http://git-wip-us.apache.org/repos/asf/incubator-rocketmq-externals/blob/70ce5c77/rocketmq-cpp/src/common/FastDelegate.h ---------------------------------------------------------------------- diff --git a/rocketmq-cpp/src/common/FastDelegate.h b/rocketmq-cpp/src/common/FastDelegate.h new file mode 100644 index 0000000..b2f5035 --- /dev/null +++ b/rocketmq-cpp/src/common/FastDelegate.h @@ -0,0 +1,2626 @@ +// FastDelegate.h +// Efficient delegates in C++ that generate only two lines of asm code! +// Documentation is found at http://www.codeproject.com/cpp/FastDelegate.asp +// +// - Don Clugston, Mar 2004. +// Major contributions were made by Jody Hagins. +// History: +// 24-Apr-04 1.0 * Submitted to CodeProject. +// 28-Apr-04 1.1 * Prevent most unsafe uses of evil static function hack. +// * Improved syntax for horrible_cast (thanks Paul Bludov). +// * Tested on Metrowerks MWCC and Intel ICL (IA32) +// * Compiled, but not run, on Comeau C++ and Intel Itanium ICL. +// 27-Jun-04 1.2 * Now works on Borland C++ Builder 5.5 +// * Now works on /clr "managed C++" code on VC7, VC7.1 +// * Comeau C++ now compiles without warnings. +// * Prevent the virtual inheritance case from being used on +// VC6 and earlier, which generate incorrect code. +// * Improved warning and error messages. Non-standard hacks +// now have compile-time checks to make them safer. +// * implicit_cast used instead of static_cast in many cases. +// * If calling a const member function, a const class pointer +// can be used. +// * MakeDelegate() global helper function added to simplify +// pass-by-value. +// * Added fastdelegate.clear() +// 16-Jul-04 1.2.1* Workaround for gcc bug (const member function pointers in +// templates) +// 30-Oct-04 1.3 * Support for (non-void) return values. +// * No more workarounds in client code! +// MSVC and Intel now use a clever hack invented by John +// Dlugosz: +// - The FASTDELEGATEDECLARE workaround is no longer +// necessary. +// - No more warning messages for VC6 +// * Less use of macros. Error messages should be more +// comprehensible. +// * Added include guards +// * Added FastDelegate::empty() to test if invocation is safe +// (Thanks Neville Franks). +// * Now tested on VS 2005 Express Beta, PGI C++ +// 24-Dec-04 1.4 * Added DelegateMemento, to allow collections of disparate +// delegates. +// * <,>,<=,>= comparison operators to allow storage in ordered +// containers. +// * Substantial reduction of code size, especially the 'Closure' +// class. +// * Standardised all the compiler-specific workarounds. +// * MFP conversion now works for CodePlay (but not yet supported +// in the full code). +// * Now compiles without warnings on _any_ supported compiler, +// including BCC 5.5.1 +// * New syntax: FastDelegate< int (char *, double) >. +// 14-Feb-05 1.4.1* Now treats =0 as equivalent to .clear(), ==0 as equivalent +// to .empty(). (Thanks elfric). +// * Now tested on Intel ICL for AMD64, VS2005 Beta for AMD64 and +// Itanium. +// 30-Mar-05 1.5 * Safebool idiom: "if (dg)" is now equivalent to "if +// (!dg.empty())" +// * Fully supported by CodePlay VectorC +// * Bugfix for Metrowerks: empty() was buggy because a valid MFP +// can be 0 on MWCC! +// * More optimal assignment,== and != operators for static +// function pointers. + +#ifndef FASTDELEGATE_H +#define FASTDELEGATE_H +#if _MSC_VER > 1000 +#pragma once +#endif // _MSC_VER > 1000 + +#include <memory.h> // to allow <,> comparisons + +//////////////////////////////////////////////////////////////////////////////// +// Configuration options +// +//////////////////////////////////////////////////////////////////////////////// + +// Uncomment the following #define for optimally-sized delegates. +// In this case, the generated asm code is almost identical to the code you'd +// get +// if the compiler had native support for delegates. +// It will not work on systems where sizeof(dataptr) < sizeof(codeptr). +// Thus, it will not work for DOS compilers using the medium model. +// It will also probably fail on some DSP systems. +#define FASTDELEGATE_USESTATICFUNCTIONHACK + +// Uncomment the next line to allow function declarator syntax. +// It is automatically enabled for those compilers where it is known to work. +//#define FASTDELEGATE_ALLOW_FUNCTION_TYPE_SYNTAX + +//////////////////////////////////////////////////////////////////////////////// +// Compiler identification for workarounds +// +//////////////////////////////////////////////////////////////////////////////// + +// Compiler identification. It's not easy to identify Visual C++ because +// many vendors fraudulently define Microsoft's identifiers. +#if defined(_MSC_VER) && !defined(__MWERKS__) && !defined(__VECTOR_C) && \ + !defined(__ICL) && !defined(__BORLANDC__) +#define FASTDLGT_ISMSVC + +#if (_MSC_VER < 1300) // Many workarounds are required for VC6. +#define FASTDLGT_VC6 +#pragma warning(disable : 4786) // disable this ridiculous warning +#endif + +#endif + +// Does the compiler uses Microsoft's member function pointer structure? +// If so, it needs special treatment. +// Metrowerks CodeWarrior, Intel, and CodePlay fraudulently define Microsoft's +// identifier, _MSC_VER. We need to filter Metrowerks out. +#if defined(_MSC_VER) && !defined(__MWERKS__) +#define FASTDLGT_MICROSOFT_MFP + +#if !defined(__VECTOR_C) +// CodePlay doesn't have the __single/multi/virtual_inheritance keywords +#define FASTDLGT_HASINHERITANCE_KEYWORDS +#endif +#endif + +// Does it allow function declarator syntax? The following compilers are known +// to work: +#if defined(FASTDLGT_ISMSVC) && (_MSC_VER >= 1310) // VC 7.1 +#define FASTDELEGATE_ALLOW_FUNCTION_TYPE_SYNTAX +#endif + +// Gcc(2.95+), and versions of Digital Mars, Intel and Comeau in common use. +#if defined(__DMC__) || defined(__GNUC__) || defined(__ICL) || defined(__COMO__) +#define FASTDELEGATE_ALLOW_FUNCTION_TYPE_SYNTAX +#endif + +// It works on Metrowerks MWCC 3.2.2. From boost.Config it should work on +// earlier ones too. +#if defined(__MWERKS__) +#define FASTDELEGATE_ALLOW_FUNCTION_TYPE_SYNTAX +#endif + +#ifdef __GNUC__ // Workaround GCC bug #8271 +// At present, GCC doesn't recognize constness of MFPs in templates +#define FASTDELEGATE_GCC_BUG_8271 +#endif + +//////////////////////////////////////////////////////////////////////////////// +// General tricks used in this code +// +// (a) Error messages are generated by typdefing an array of negative size to +// generate compile-time errors. +// (b) Warning messages on MSVC are generated by declaring unused variables, and +// enabling the "variable XXX is never used" warning. +// (c) Unions are used in a few compiler-specific cases to perform illegal +// casts. +// (d) For Microsoft and Intel, when adjusting the 'this' pointer, it's cast to +// (char *) first to ensure that the correct number of *bytes* are added. +// +//////////////////////////////////////////////////////////////////////////////// +// Helper templates +// +//////////////////////////////////////////////////////////////////////////////// + +namespace fastdelegate { +namespace detail { // we'll hide the implementation details in a nested + // namespace. + +// implicit_cast< > +// I believe this was originally going to be in the C++ standard but +// was left out by accident. It's even milder than static_cast. +// I use it instead of static_cast<> to emphasize that I'm not doing +// anything nasty. +// Usage is identical to static_cast<> +template <class OutputClass, class InputClass> +inline OutputClass implicit_cast(InputClass input) { + return input; +} + +// horrible_cast< > +// This is truly evil. It completely subverts C++'s type system, allowing you +// to cast from any class to any other class. Technically, using a union +// to perform the cast is undefined behaviour (even in C). But we can see if +// it is OK by checking that the union is the same size as each of its members. +// horrible_cast<> should only be used for compiler-specific workarounds. +// Usage is identical to reinterpret_cast<>. + +// This union is declared outside the horrible_cast because BCC 5.5.1 +// can't inline a function with a nested class, and gives a warning. +template <class OutputClass, class InputClass> +union horrible_union { + OutputClass out; + InputClass in; +}; + +template <class OutputClass, class InputClass> +inline OutputClass horrible_cast(const InputClass input) { + horrible_union<OutputClass, InputClass> u; + // Cause a compile-time error if in, out and u are not the same size. + // If the compile fails here, it means the compiler has peculiar + // unions which would prevent the cast from working. + // typedef int ERROR_CantUseHorrible_cast[sizeof(InputClass)==sizeof(u) + // && sizeof(InputClass)==sizeof(OutputClass) ? 1 : -1]; + u.in = input; + return u.out; +} + +//////////////////////////////////////////////////////////////////////////////// +// Workarounds +// +//////////////////////////////////////////////////////////////////////////////// + +// Backwards compatibility: This macro used to be necessary in the virtual +// inheritance +// case for Intel and Microsoft. Now it just forward-declares the class. +#define FASTDELEGATEDECLARE(CLASSNAME) class CLASSNAME; + +// Prevent use of the static function hack with the DOS medium model. +#ifdef __MEDIUM__ +#undef FASTDELEGATE_USESTATICFUNCTIONHACK +#endif + +// DefaultVoid - a workaround for 'void' templates in VC6. +// +// (1) VC6 and earlier do not allow 'void' as a default template argument. +// (2) They also doesn't allow you to return 'void' from a function. +// +// Workaround for (1): Declare a dummy type 'DefaultVoid' which we use +// when we'd like to use 'void'. We convert it into 'void' and back +// using the templates DefaultVoidToVoid<> and VoidToDefaultVoid<>. +// Workaround for (2): On VC6, the code for calling a void function is +// identical to the code for calling a non-void function in which the +// return value is never used, provided the return value is returned +// in the EAX register, rather than on the stack. +// This is true for most fundamental types such as int, enum, void *. +// Const void * is the safest option since it doesn't participate +// in any automatic conversions. But on a 16-bit compiler it might +// cause extra code to be generated, so we disable it for all compilers +// except for VC6 (and VC5). +#ifdef FASTDLGT_VC6 +// VC6 workaround +typedef const void* DefaultVoid; +#else +// On any other compiler, just use a normal void. +typedef void DefaultVoid; +#endif + +// Translate from 'DefaultVoid' to 'void'. +// Everything else is unchanged +template <class T> +struct DefaultVoidToVoid { + typedef T type; +}; + +template <> +struct DefaultVoidToVoid<DefaultVoid> { + typedef void type; +}; + +// Translate from 'void' into 'DefaultVoid' +// Everything else is unchanged +template <class T> +struct VoidToDefaultVoid { + typedef T type; +}; + +template <> +struct VoidToDefaultVoid<void> { + typedef DefaultVoid type; +}; + +//////////////////////////////////////////////////////////////////////////////// +// Fast Delegates, part 1: +// +// Conversion of member function pointer to a standard form +// +//////////////////////////////////////////////////////////////////////////////// + +// GenericClass is a fake class, ONLY used to provide a type. +// It is vitally important that it is never defined, so that the compiler +// doesn't +// think it can optimize the invocation. For example, Borland generates simpler +// code if it knows the class only uses single inheritance. + +// Compilers using Microsoft's structure need to be treated as a special case. +#ifdef FASTDLGT_MICROSOFT_MFP + +#ifdef FASTDLGT_HASINHERITANCE_KEYWORDS +// For Microsoft and Intel, we want to ensure that it's the most efficient type +// of MFP +// (4 bytes), even when the /vmg option is used. Declaring an empty class +// would give 16 byte pointers in this case.... +class __single_inheritance GenericClass; +#endif +// ...but for Codeplay, an empty class *always* gives 4 byte pointers. +// If compiled with the /clr option ("managed C++"), the JIT compiler thinks +// it needs to load GenericClass before it can call any of its functions, +// (compiles OK but crashes at runtime!), so we need to declare an +// empty class to make it happy. +// Codeplay and VC4 can't cope with the unknown_inheritance case either. +class GenericClass {}; +#else +class GenericClass; +#endif + +// The size of a single inheritance member function pointer. +const int SINGLE_MEMFUNCPTR_SIZE = sizeof(void (GenericClass::*)()); + +// SimplifyMemFunc< >::Convert() +// +// A template function that converts an arbitrary member function pointer into +// the +// simplest possible form of member function pointer, using a supplied 'this' +// pointer. +// According to the standard, this can be done legally with reinterpret_cast<>. +// For (non-standard) compilers which use member function pointers which vary +// in size +// depending on the class, we need to use knowledge of the internal structure +// of a +// member function pointer, as used by the compiler. Template specialization is +// used +// to distinguish between the sizes. Because some compilers don't support +// partial +// template specialisation, I use full specialisation of a wrapper struct. + +// general case -- don't know how to convert it. Force a compile failure +template <int N> +struct SimplifyMemFunc { + template <class X, class XFuncType, class GenericMemFuncType> + inline static GenericClass* Convert(X* pthis, XFuncType function_to_bind, + GenericMemFuncType& bound_func) { + // Unsupported member function type -- force a compile failure. + // (it's illegal to have a array with negative size). + // typedef char ERROR_Unsupported_member_function_pointer_on_this_compiler[N + // - 100]; + return 0; + } +}; + +// For compilers where all member func ptrs are the same size, everything goes +// here. +// For non-standard compilers, only single_inheritance classes go here. +template <> +struct SimplifyMemFunc<SINGLE_MEMFUNCPTR_SIZE> { + template <class X, class XFuncType, class GenericMemFuncType> + inline static GenericClass* Convert(X* pthis, XFuncType function_to_bind, + GenericMemFuncType& bound_func) { +#if defined __DMC__ + // Digital Mars doesn't allow you to cast between abitrary PMF's, + // even though the standard says you can. The 32-bit compiler lets you + // static_cast through an int, but the DOS compiler doesn't. + bound_func = horrible_cast<GenericMemFuncType>(function_to_bind); +#else + bound_func = reinterpret_cast<GenericMemFuncType>(function_to_bind); +#endif + return reinterpret_cast<GenericClass*>(pthis); + } +}; + +//////////////////////////////////////////////////////////////////////////////// +// Fast Delegates, part 1b: +// +// Workarounds for Microsoft and Intel +// +//////////////////////////////////////////////////////////////////////////////// + +// Compilers with member function pointers which violate the standard (MSVC, +// Intel, Codeplay), +// need to be treated as a special case. +#ifdef FASTDLGT_MICROSOFT_MFP + +// We use unions to perform horrible_casts. I would like to use #pragma +// pack(push, 1) +// at the start of each function for extra safety, but VC6 seems to ICE +// intermittently if you do this inside a template. + +// __multiple_inheritance classes go here +// Nasty hack for Microsoft and Intel (IA32 and Itanium) +template <> +struct SimplifyMemFunc<SINGLE_MEMFUNCPTR_SIZE + sizeof(int)> { + template <class X, class XFuncType, class GenericMemFuncType> + inline static GenericClass* Convert(X* pthis, XFuncType function_to_bind, + GenericMemFuncType& bound_func) { + // We need to use a horrible_cast to do this conversion. + // In MSVC, a multiple inheritance member pointer is internally defined as: + union { + XFuncType func; + struct { + GenericMemFuncType funcaddress; // points to the actual member function + int delta; // #BYTES to be added to the 'this' pointer + } s; + } u; + // Check that the horrible_cast will work + typedef int ERROR_CantUsehorrible_cast + [sizeof(function_to_bind) == sizeof(u.s) ? 1 : -1]; + u.func = function_to_bind; + bound_func = u.s.funcaddress; + return reinterpret_cast<GenericClass*>(reinterpret_cast<char*>(pthis) + + u.s.delta); + } +}; + +// virtual inheritance is a real nuisance. It's inefficient and complicated. +// On MSVC and Intel, there isn't enough information in the pointer itself to +// enable conversion to a closure pointer. Earlier versions of this code didn't +// work for all cases, and generated a compile-time error instead. +// But a very clever hack invented by John M. Dlugosz solves this problem. +// My code is somewhat different to his: I have no asm code, and I make no +// assumptions about the calling convention that is used. + +// In VC++ and ICL, a virtual_inheritance member pointer +// is internally defined as: +struct MicrosoftVirtualMFP { + void (GenericClass::*codeptr)(); // points to the actual member function + int delta; // #bytes to be added to the 'this' pointer + int vtable_index; // or 0 if no virtual inheritance +}; +// The CRUCIAL feature of Microsoft/Intel MFPs which we exploit is that the +// m_codeptr member is *always* called, regardless of the values of the other +// members. (This is *not* true for other compilers, eg GCC, which obtain the +// function address from the vtable if a virtual function is being called). +// Dlugosz's trick is to make the codeptr point to a probe function which +// returns the 'this' pointer that was used. + +// Define a generic class that uses virtual inheritance. +// It has a trival member function that returns the value of the 'this' pointer. +struct GenericVirtualClass : virtual public GenericClass { + typedef GenericVirtualClass* (GenericVirtualClass::*ProbePtrType)(); + GenericVirtualClass* GetThis() { return this; } +}; + +// __virtual_inheritance classes go here +template <> +struct SimplifyMemFunc<SINGLE_MEMFUNCPTR_SIZE + 2 * sizeof(int)> { + template <class X, class XFuncType, class GenericMemFuncType> + inline static GenericClass* Convert(X* pthis, XFuncType function_to_bind, + GenericMemFuncType& bound_func) { + union { + XFuncType func; + GenericClass* (X::*ProbeFunc)(); + MicrosoftVirtualMFP s; + } u; + u.func = function_to_bind; + bound_func = reinterpret_cast<GenericMemFuncType>(u.s.codeptr); + union { + GenericVirtualClass::ProbePtrType virtfunc; + MicrosoftVirtualMFP s; + } u2; + // Check that the horrible_cast<>s will work + typedef int + ERROR_CantUsehorrible_cast[sizeof(function_to_bind) == sizeof(u.s) && + sizeof(function_to_bind) == + sizeof(u.ProbeFunc) && + sizeof(u2.virtfunc) == sizeof(u2.s) + ? 1 + : -1]; + // Unfortunately, taking the address of a MF prevents it from being inlined, + // so + // this next line can't be completely optimised away by the compiler. + u2.virtfunc = &GenericVirtualClass::GetThis; + u.s.codeptr = u2.s.codeptr; + return (pthis->*u.ProbeFunc)(); + } +}; + +#if (_MSC_VER < 1300) + +// Nasty hack for Microsoft Visual C++ 6.0 +// unknown_inheritance classes go here +// There is a compiler bug in MSVC6 which generates incorrect code in this +// case!! +template <> +struct SimplifyMemFunc<SINGLE_MEMFUNCPTR_SIZE + 3 * sizeof(int)> { + template <class X, class XFuncType, class GenericMemFuncType> + inline static GenericClass* Convert(X* pthis, XFuncType function_to_bind, + GenericMemFuncType& bound_func) { + // There is an apalling but obscure compiler bug in MSVC6 and earlier: + // vtable_index and 'vtordisp' are always set to 0 in the + // unknown_inheritance case! + // This means that an incorrect function could be called!!! + // Compiling with the /vmg option leads to potentially incorrect code. + // This is probably the reason that the IDE has a user interface for + // specifying + // the /vmg option, but it is disabled - you can only specify /vmg on + // the command line. In VC1.5 and earlier, the compiler would ICE if it ever + // encountered this situation. + // It is OK to use the /vmg option if /vmm or /vms is specified. + + // Fortunately, the wrong function is only called in very obscure cases. + // It only occurs when a derived class overrides a virtual function declared + // in a virtual base class, and the member function + // points to the *Derived* version of that function. The problem can be + // completely averted in 100% of cases by using the *Base class* for the + // member fpointer. Ie, if you use the base class as an interface, you'll + // stay out of trouble. + // Occasionally, you might want to point directly to a derived class + // function + // that isn't an override of a base class. In this case, both vtable_index + // and 'vtordisp' are zero, but a virtual_inheritance pointer will be + // generated. + // We can generate correct code in this case. To prevent an incorrect call + // from + // ever being made, on MSVC6 we generate a warning, and call a function to + // make the program crash instantly. + typedef char ERROR_VC6CompilerBug[-100]; + return 0; + } +}; + +#else + +// Nasty hack for Microsoft and Intel (IA32 and Itanium) +// unknown_inheritance classes go here +// This is probably the ugliest bit of code I've ever written. Look at the +// casts! +// There is a compiler bug in MSVC6 which prevents it from using this code. +template <> +struct SimplifyMemFunc<SINGLE_MEMFUNCPTR_SIZE + 3 * sizeof(int)> { + template <class X, class XFuncType, class GenericMemFuncType> + inline static GenericClass* Convert(X* pthis, XFuncType function_to_bind, + GenericMemFuncType& bound_func) { + // The member function pointer is 16 bytes long. We can't use a normal cast, + // but + // we can use a union to do the conversion. + union { + XFuncType func; + // In VC++ and ICL, an unknown_inheritance member pointer + // is internally defined as: + struct { + GenericMemFuncType + m_funcaddress; // points to the actual member function + int delta; // #bytes to be added to the 'this' pointer + int vtordisp; // #bytes to add to 'this' to find the vtable + int vtable_index; // or 0 if no virtual inheritance + } s; + } u; + // Check that the horrible_cast will work + typedef int + ERROR_CantUsehorrible_cast[sizeof(XFuncType) == sizeof(u.s) ? 1 : -1]; + u.func = function_to_bind; + bound_func = u.s.funcaddress; + int virtual_delta = 0; + if (u.s.vtable_index) { // Virtual inheritance is used + // First, get to the vtable. + // It is 'vtordisp' bytes from the start of the class. + const int* vtable = *reinterpret_cast<const int* const*>( + reinterpret_cast<const char*>(pthis) + u.s.vtordisp); + + // 'vtable_index' tells us where in the table we should be looking. + virtual_delta = + u.s.vtordisp + + *reinterpret_cast<const int*>(reinterpret_cast<const char*>(vtable) + + u.s.vtable_index); + } + // The int at 'virtual_delta' gives us the amount to add to 'this'. + // Finally we can add the three components together. Phew! + return reinterpret_cast<GenericClass*>(reinterpret_cast<char*>(pthis) + + u.s.delta + virtual_delta); + }; +}; +#endif // MSVC 7 and greater + +#endif // MS/Intel hacks + +} // namespace detail + +//////////////////////////////////////////////////////////////////////////////// +// Fast Delegates, part 2: +// +// Define the delegate storage, and cope with static functions +// +//////////////////////////////////////////////////////////////////////////////// + +// DelegateMemento -- an opaque structure which can hold an arbitary delegate. +// It knows nothing about the calling convention or number of arguments used by +// the function pointed to. +// It supplies comparison operators so that it can be stored in STL collections. +// It cannot be set to anything other than null, nor invoked directly: +// it must be converted to a specific delegate. + +// Implementation: +// There are two possible implementations: the Safe method and the Evil method. +// DelegateMemento - Safe version +// +// This implementation is standard-compliant, but a bit tricky. +// A static function pointer is stored inside the class. +// Here are the valid values: +// +-- Static pointer --+--pThis --+-- pMemFunc-+-- Meaning------+ +// | 0 | 0 | 0 | Empty | +// | !=0 |(dontcare)| Invoker | Static function| +// | 0 | !=0 | !=0* | Method call | +// +--------------------+----------+------------+----------------+ +// * For Metrowerks, this can be 0. (first virtual function in a +// single_inheritance class). +// When stored stored inside a specific delegate, the 'dontcare' entries are +// replaced +// with a reference to the delegate itself. This complicates the = and == +// operators +// for the delegate class. + +// DelegateMemento - Evil version +// +// For compilers where data pointers are at least as big as code pointers, it is +// possible to store the function pointer in the this pointer, using another +// horrible_cast. In this case the DelegateMemento implementation is simple: +// +--pThis --+-- pMemFunc-+-- Meaning---------------------+ +// | 0 | 0 | Empty | +// | !=0 | !=0* | Static function or method call| +// +----------+------------+-------------------------------+ +// * For Metrowerks, this can be 0. (first virtual function in a +// single_inheritance class). +// Note that the Sun C++ and MSVC documentation explicitly state that they +// support static_cast between void * and function pointers. + +class DelegateMemento { + protected: + // the data is protected, not private, because many + // compilers have problems with template friends. + typedef void (detail::GenericClass::*GenericMemFuncType)(); // arbitrary MFP. + detail::GenericClass* m_pthis; + GenericMemFuncType m_pFunction; + +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + typedef void (*GenericFuncPtr)(); // arbitrary code pointer + GenericFuncPtr m_pStaticFunction; +#endif + + public: +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + DelegateMemento() : m_pthis(0), m_pFunction(0), m_pStaticFunction(0){}; + void clear() { + m_pthis = 0; + m_pFunction = 0; + m_pStaticFunction = 0; + } +#else + DelegateMemento() : m_pthis(0), m_pFunction(0){}; + void clear() { + m_pthis = 0; + m_pFunction = 0; + } +#endif + public: +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + inline bool IsEqual(const DelegateMemento& x) const { + // We have to cope with the static function pointers as a special case + if (m_pFunction != x.m_pFunction) return false; + // the static function ptrs must either both be equal, or both be 0. + if (m_pStaticFunction != x.m_pStaticFunction) return false; + if (m_pStaticFunction != 0) + return m_pthis == x.m_pthis; + else + return true; + } +#else // Evil Method + inline bool IsEqual(const DelegateMemento& x) const { + return m_pthis == x.m_pthis && m_pFunction == x.m_pFunction; + } +#endif + // Provide a strict weak ordering for DelegateMementos. + inline bool IsLess(const DelegateMemento& right) const { +// deal with static function pointers first +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + if (m_pStaticFunction != 0 || right.m_pStaticFunction != 0) + return m_pStaticFunction < right.m_pStaticFunction; +#endif + if (m_pthis != right.m_pthis) return m_pthis < right.m_pthis; + // There are no ordering operators for member function pointers, + // but we can fake one by comparing each byte. The resulting ordering is + // arbitrary (and compiler-dependent), but it permits storage in ordered STL + // containers. + return memcmp(&m_pFunction, &right.m_pFunction, sizeof(m_pFunction)) < 0; + } + // BUGFIX (Mar 2005): + // We can't just compare m_pFunction because on Metrowerks, + // m_pFunction can be zero even if the delegate is not empty! + inline bool operator!() const { // Is it bound to anything? + return m_pthis == 0 && m_pFunction == 0; + } + inline bool empty() const { // Is it bound to anything? + return m_pthis == 0 && m_pFunction == 0; + } + + public: + DelegateMemento& operator=(const DelegateMemento& right) { + SetMementoFrom(right); + return *this; + } + inline bool operator<(const DelegateMemento& right) { return IsLess(right); } + inline bool operator>(const DelegateMemento& right) { + return right.IsLess(*this); + } + DelegateMemento(const DelegateMemento& right) + : m_pthis(right.m_pthis), + m_pFunction(right.m_pFunction) +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + , + m_pStaticFunction(right.m_pStaticFunction) +#endif + { + } + + protected: + void SetMementoFrom(const DelegateMemento& right) { + m_pFunction = right.m_pFunction; + m_pthis = right.m_pthis; +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + m_pStaticFunction = right.m_pStaticFunction; +#endif + } +}; + +// ClosurePtr<> +// +// A private wrapper class that adds function signatures to DelegateMemento. +// It's the class that does most of the actual work. +// The signatures are specified by: +// GenericMemFunc: must be a type of GenericClass member function pointer. +// StaticFuncPtr: must be a type of function pointer with the same signature +// as GenericMemFunc. +// UnvoidStaticFuncPtr: is the same as StaticFuncPtr, except on VC6 +// where it never returns void (returns DefaultVoid instead). + +// An outer class, FastDelegateN<>, handles the invoking and creates the +// necessary typedefs. +// This class does everything else. + +namespace detail { + +template <class GenericMemFunc, class StaticFuncPtr, class UnvoidStaticFuncPtr> +class ClosurePtr : public DelegateMemento { + public: + // These functions are for setting the delegate to a member function. + + // Here's the clever bit: we convert an arbitrary member function into a + // standard form. XMemFunc should be a member function of class X, but I can't + // enforce that here. It needs to be enforced by the wrapper class. + template <class X, class XMemFunc> + inline void bindmemfunc(X* pthis, XMemFunc function_to_bind) { + m_pthis = SimplifyMemFunc<sizeof(function_to_bind)>::Convert( + pthis, function_to_bind, m_pFunction); +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + m_pStaticFunction = 0; +#endif + } + // For const member functions, we only need a const class pointer. + // Since we know that the member function is const, it's safe to + // remove the const qualifier from the 'this' pointer with a const_cast. + // VC6 has problems if we just overload 'bindmemfunc', so we give it a + // different name. + template <class X, class XMemFunc> + inline void bindconstmemfunc(const X* pthis, XMemFunc function_to_bind) { + m_pthis = SimplifyMemFunc<sizeof(function_to_bind)>::Convert( + const_cast<X*>(pthis), function_to_bind, m_pFunction); +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + m_pStaticFunction = 0; +#endif + } +#ifdef FASTDELEGATE_GCC_BUG_8271 // At present, GCC doesn't recognize constness + // of MFPs in templates + template <class X, class XMemFunc> + inline void bindmemfunc(const X* pthis, XMemFunc function_to_bind) { + bindconstmemfunc(pthis, function_to_bind); +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + m_pStaticFunction = 0; +#endif + } +#endif + // These functions are required for invoking the stored function + inline GenericClass* GetClosureThis() const { return m_pthis; } + inline GenericMemFunc GetClosureMemPtr() const { + return reinterpret_cast<GenericMemFunc>(m_pFunction); + } + +// There are a few ways of dealing with static function pointers. +// There's a standard-compliant, but tricky method. +// There's also a straightforward hack, that won't work on DOS compilers using +// the +// medium memory model. It's so evil that I can't recommend it, but I've +// implemented it anyway because it produces very nice asm code. + +#if !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + + // ClosurePtr<> - Safe version + // + // This implementation is standard-compliant, but a bit tricky. + // I store the function pointer inside the class, and the delegate then + // points to itself. Whenever the delegate is copied, these self-references + // must be transformed, and this complicates the = and == operators. + public: + // The next two functions are for operator ==, =, and the copy constructor. + // We may need to convert the m_pthis pointers, so that + // they remain as self-references. + template <class DerivedClass> + inline void CopyFrom(DerivedClass* pParent, const DelegateMemento& x) { + SetMementoFrom(x); + if (m_pStaticFunction != 0) { + // transform self references... + m_pthis = reinterpret_cast<GenericClass*>(pParent); + } + } + // For static functions, the 'static_function_invoker' class in the parent + // will be called. The parent then needs to call GetStaticFunction() to find + // out + // the actual function to invoke. + template <class DerivedClass, class ParentInvokerSig> + inline void bindstaticfunc(DerivedClass* pParent, + ParentInvokerSig static_function_invoker, + StaticFuncPtr function_to_bind) { + if (function_to_bind == 0) { // cope with assignment to 0 + m_pFunction = 0; + } else { + bindmemfunc(pParent, static_function_invoker); + } + m_pStaticFunction = reinterpret_cast<GenericFuncPtr>(function_to_bind); + } + inline UnvoidStaticFuncPtr GetStaticFunction() const { + return reinterpret_cast<UnvoidStaticFuncPtr>(m_pStaticFunction); + } +#else + + // ClosurePtr<> - Evil version + // + // For compilers where data pointers are at least as big as code pointers, it + // is + // possible to store the function pointer in the this pointer, using another + // horrible_cast. Invocation isn't any faster, but it saves 4 bytes, and + // speeds up comparison and assignment. If C++ provided direct language + // support + // for delegates, they would produce asm code that was almost identical to + // this. + // Note that the Sun C++ and MSVC documentation explicitly state that they + // support static_cast between void * and function pointers. + + template <class DerivedClass> + inline void CopyFrom(DerivedClass* pParent, const DelegateMemento& right) { + SetMementoFrom(right); + } + // For static functions, the 'static_function_invoker' class in the parent + // will be called. The parent then needs to call GetStaticFunction() to find + // out + // the actual function to invoke. + // ******** EVIL, EVIL CODE! ******* + template <class DerivedClass, class ParentInvokerSig> + inline void bindstaticfunc(DerivedClass* pParent, + ParentInvokerSig static_function_invoker, + StaticFuncPtr function_to_bind) { + if (function_to_bind == 0) { // cope with assignment to 0 + m_pFunction = 0; + } else { + // We'll be ignoring the 'this' pointer, but we need to make sure we pass + // a valid value to bindmemfunc(). + bindmemfunc(pParent, static_function_invoker); + } + + // WARNING! Evil hack. We store the function in the 'this' pointer! + // Ensure that there's a compilation failure if function pointers + // and data pointers have different sizes. + // If you get this error, you need to #undef + // FASTDELEGATE_USESTATICFUNCTIONHACK. + // typedef int ERROR_CantUseEvilMethod[sizeof(GenericClass*) == + // sizeof(function_to_bind) ? 1 : -1]; + m_pthis = horrible_cast<GenericClass*>(function_to_bind); + // MSVC, SunC++ and DMC accept the following (non-standard) code: + // m_pthis = static_cast<GenericClass *>(static_cast<void + // *>(function_to_bind)); + // BCC32, Comeau and DMC accept this method. MSVC7.1 needs __int64 instead + // of long + // m_pthis = reinterpret_cast<GenericClass + // *>(reinterpret_cast<long>(function_to_bind)); + } + // ******** EVIL, EVIL CODE! ******* + // This function will be called with an invalid 'this' pointer!! + // We're just returning the 'this' pointer, converted into + // a function pointer! + inline UnvoidStaticFuncPtr GetStaticFunction() const { + // Ensure that there's a compilation failure if function pointers + // and data pointers have different sizes. + // If you get this error, you need to #undef + // FASTDELEGATE_USESTATICFUNCTIONHACK. + // typedef int ERROR_CantUseEvilMethod[sizeof(UnvoidStaticFuncPtr) == + // sizeof(this) ? 1 : -1]; + return horrible_cast<UnvoidStaticFuncPtr>(this); + } +#endif // !defined(FASTDELEGATE_USESTATICFUNCTIONHACK) + + // Does the closure contain this static function? + inline bool IsEqualToStaticFuncPtr(StaticFuncPtr funcptr) { + if (funcptr == 0) return empty(); + // For the Evil method, if it doesn't actually contain a static function, + // this will return an arbitrary + // value that is not equal to any valid function pointer. + else + return funcptr == reinterpret_cast<StaticFuncPtr>(GetStaticFunction()); + } +}; + +} // namespace detail + +//////////////////////////////////////////////////////////////////////////////// +// Fast Delegates, part 3: +// +// Wrapper classes to ensure type safety +// +//////////////////////////////////////////////////////////////////////////////// + +// Once we have the member function conversion templates, it's easy to make the +// wrapper classes. So that they will work with as many compilers as possible, +// the classes are of the form +// FastDelegate3<int, char *, double> +// They can cope with any combination of parameters. The max number of +// parameters +// allowed is 8, but it is trivial to increase this limit. +// Note that we need to treat const member functions seperately. +// All this class does is to enforce type safety, and invoke the delegate with +// the correct list of parameters. + +// Because of the weird rule about the class of derived member function +// pointers, +// you sometimes need to apply a downcast to the 'this' pointer. +// This is the reason for the use of "implicit_cast<X*>(pthis)" in the code +// below. +// If CDerivedClass is derived from CBaseClass, but doesn't override +// SimpleVirtualFunction, +// without this trick you'd need to write: +// MyDelegate(static_cast<CBaseClass *>(&d), +// &CDerivedClass::SimpleVirtualFunction); +// but with the trick you can write +// MyDelegate(&d, &CDerivedClass::SimpleVirtualFunction); + +// RetType is the type the compiler uses in compiling the template. For VC6, +// it cannot be void. DesiredRetType is the real type which is returned from +// all of the functions. It can be void. + +// Implicit conversion to "bool" is achieved using the safe_bool idiom, +// using member data pointers (MDP). This allows "if (dg)..." syntax +// Because some compilers (eg codeplay) don't have a unique value for a zero +// MDP, an extra padding member is added to the SafeBool struct. +// Some compilers (eg VC6) won't implicitly convert from 0 to an MDP, so +// in that case the static function constructor is not made explicit; this +// allows "if (dg==0) ..." to compile. + +// N=0 +template <class RetType = detail::DefaultVoid> +class FastDelegate0 { + private: + typedef typename detail::DefaultVoidToVoid<RetType>::type DesiredRetType; + typedef DesiredRetType (*StaticFunctionPtr)(); + typedef RetType (*UnvoidStaticFunctionPtr)(); + typedef RetType (detail::GenericClass::*GenericMemFn)(); + typedef detail::ClosurePtr<GenericMemFn, StaticFunctionPtr, + UnvoidStaticFunctionPtr> + ClosureType; + ClosureType m_Closure; + + public: + // Typedefs to aid generic programming + typedef FastDelegate0 type; + + // Construction and comparison functions + FastDelegate0() { clear(); } + FastDelegate0(const FastDelegate0& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + void operator=(const FastDelegate0& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + bool operator==(const FastDelegate0& x) const { + return m_Closure.IsEqual(x.m_Closure); + } + bool operator!=(const FastDelegate0& x) const { + return !m_Closure.IsEqual(x.m_Closure); + } + bool operator<(const FastDelegate0& x) const { + return m_Closure.IsLess(x.m_Closure); + } + bool operator>(const FastDelegate0& x) const { + return x.m_Closure.IsLess(m_Closure); + } + // Binding to non-const member functions + template <class X, class Y> + FastDelegate0(Y* pthis, DesiredRetType (X::*function_to_bind)()) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + template <class X, class Y> + inline void bind(Y* pthis, DesiredRetType (X::*function_to_bind)()) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + // Binding to const member functions. + template <class X, class Y> + FastDelegate0(const Y* pthis, DesiredRetType (X::*function_to_bind)() const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + template <class X, class Y> + inline void bind(const Y* pthis, + DesiredRetType (X::*function_to_bind)() const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + // Static functions. We convert them into a member function call. + // This constructor also provides implicit conversion + FastDelegate0(DesiredRetType (*function_to_bind)()) { + bind(function_to_bind); + } + // for efficiency, prevent creation of a temporary + void operator=(DesiredRetType (*function_to_bind)()) { + bind(function_to_bind); + } + inline void bind(DesiredRetType (*function_to_bind)()) { + m_Closure.bindstaticfunc(this, &FastDelegate0::InvokeStaticFunction, + function_to_bind); + } + // Invoke the delegate + RetType operator()() const { + return (m_Closure.GetClosureThis()->*(m_Closure.GetClosureMemPtr()))(); + } + // Implicit conversion to "bool" using the safe_bool idiom + private: + typedef struct SafeBoolStruct { + int a_data_pointer_to_this_is_0_on_buggy_compilers; + StaticFunctionPtr m_nonzero; + } UselessTypedef; + typedef StaticFunctionPtr SafeBoolStruct::*unspecified_bool_type; + + public: + operator unspecified_bool_type() const { + return empty() ? 0 : &SafeBoolStruct::m_nonzero; + } + // necessary to allow ==0 to work despite the safe_bool idiom + inline bool operator==(StaticFunctionPtr funcptr) { + return m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!=(StaticFunctionPtr funcptr) { + return !m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!() const { // Is it bound to anything? + return !m_Closure; + } + inline bool empty() const { return !m_Closure; } + void clear() { m_Closure.clear(); } + // Conversion to and from the DelegateMemento storage class + const DelegateMemento& GetMemento() { return m_Closure; } + void SetMemento(const DelegateMemento& any) { m_Closure.CopyFrom(this, any); } + + private: // Invoker for static functions + RetType InvokeStaticFunction() const { + return (*(m_Closure.GetStaticFunction()))(); + } +}; + +// N=1 +template <class Param1, class RetType = detail::DefaultVoid> +class FastDelegate1 { + private: + typedef typename detail::DefaultVoidToVoid<RetType>::type DesiredRetType; + typedef DesiredRetType (*StaticFunctionPtr)(Param1 p1); + typedef RetType (*UnvoidStaticFunctionPtr)(Param1 p1); + typedef RetType (detail::GenericClass::*GenericMemFn)(Param1 p1); + typedef detail::ClosurePtr<GenericMemFn, StaticFunctionPtr, + UnvoidStaticFunctionPtr> + ClosureType; + ClosureType m_Closure; + + public: + // Typedefs to aid generic programming + typedef FastDelegate1 type; + + // Construction and comparison functions + FastDelegate1() { clear(); } + FastDelegate1(const FastDelegate1& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + void operator=(const FastDelegate1& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + bool operator==(const FastDelegate1& x) const { + return m_Closure.IsEqual(x.m_Closure); + } + bool operator!=(const FastDelegate1& x) const { + return !m_Closure.IsEqual(x.m_Closure); + } + bool operator<(const FastDelegate1& x) const { + return m_Closure.IsLess(x.m_Closure); + } + bool operator>(const FastDelegate1& x) const { + return x.m_Closure.IsLess(m_Closure); + } + // Binding to non-const member functions + template <class X, class Y> + FastDelegate1(Y* pthis, DesiredRetType (X::*function_to_bind)(Param1 p1)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + template <class X, class Y> + inline void bind(Y* pthis, DesiredRetType (X::*function_to_bind)(Param1 p1)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + // Binding to const member functions. + template <class X, class Y> + FastDelegate1(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1) const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + template <class X, class Y> + inline void bind(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1) const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + // Static functions. We convert them into a member function call. + // This constructor also provides implicit conversion + FastDelegate1(DesiredRetType (*function_to_bind)(Param1 p1)) { + bind(function_to_bind); + } + // for efficiency, prevent creation of a temporary + void operator=(DesiredRetType (*function_to_bind)(Param1 p1)) { + bind(function_to_bind); + } + inline void bind(DesiredRetType (*function_to_bind)(Param1 p1)) { + m_Closure.bindstaticfunc(this, &FastDelegate1::InvokeStaticFunction, + function_to_bind); + } + // Invoke the delegate + RetType operator()(Param1 p1) const { + return (m_Closure.GetClosureThis()->*(m_Closure.GetClosureMemPtr()))(p1); + } + // Implicit conversion to "bool" using the safe_bool idiom + private: + typedef struct SafeBoolStruct { + int a_data_pointer_to_this_is_0_on_buggy_compilers; + StaticFunctionPtr m_nonzero; + } UselessTypedef; + typedef StaticFunctionPtr SafeBoolStruct::*unspecified_bool_type; + + public: + operator unspecified_bool_type() const { + return empty() ? 0 : &SafeBoolStruct::m_nonzero; + } + // necessary to allow ==0 to work despite the safe_bool idiom + inline bool operator==(StaticFunctionPtr funcptr) { + return m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!=(StaticFunctionPtr funcptr) { + return !m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!() const { // Is it bound to anything? + return !m_Closure; + } + inline bool empty() const { return !m_Closure; } + void clear() { m_Closure.clear(); } + // Conversion to and from the DelegateMemento storage class + const DelegateMemento& GetMemento() { return m_Closure; } + void SetMemento(const DelegateMemento& any) { m_Closure.CopyFrom(this, any); } + + private: // Invoker for static functions + RetType InvokeStaticFunction(Param1 p1) const { + return (*(m_Closure.GetStaticFunction()))(p1); + } +}; + +// N=2 +template <class Param1, class Param2, class RetType = detail::DefaultVoid> +class FastDelegate2 { + private: + typedef typename detail::DefaultVoidToVoid<RetType>::type DesiredRetType; + typedef DesiredRetType (*StaticFunctionPtr)(Param1 p1, Param2 p2); + typedef RetType (*UnvoidStaticFunctionPtr)(Param1 p1, Param2 p2); + typedef RetType (detail::GenericClass::*GenericMemFn)(Param1 p1, Param2 p2); + typedef detail::ClosurePtr<GenericMemFn, StaticFunctionPtr, + UnvoidStaticFunctionPtr> + ClosureType; + ClosureType m_Closure; + + public: + // Typedefs to aid generic programming + typedef FastDelegate2 type; + + // Construction and comparison functions + FastDelegate2() { clear(); } + FastDelegate2(const FastDelegate2& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + void operator=(const FastDelegate2& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + bool operator==(const FastDelegate2& x) const { + return m_Closure.IsEqual(x.m_Closure); + } + bool operator!=(const FastDelegate2& x) const { + return !m_Closure.IsEqual(x.m_Closure); + } + bool operator<(const FastDelegate2& x) const { + return m_Closure.IsLess(x.m_Closure); + } + bool operator>(const FastDelegate2& x) const { + return x.m_Closure.IsLess(m_Closure); + } + // Binding to non-const member functions + template <class X, class Y> + FastDelegate2(Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + template <class X, class Y> + inline void bind(Y* pthis, DesiredRetType (X::*function_to_bind)(Param1 p1, + Param2 p2)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + // Binding to const member functions. + template <class X, class Y> + FastDelegate2(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2) + const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + template <class X, class Y> + inline void bind(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2) + const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + // Static functions. We convert them into a member function call. + // This constructor also provides implicit conversion + FastDelegate2(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2)) { + bind(function_to_bind); + } + // for efficiency, prevent creation of a temporary + void operator=(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2)) { + bind(function_to_bind); + } + inline void bind(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2)) { + m_Closure.bindstaticfunc(this, &FastDelegate2::InvokeStaticFunction, + function_to_bind); + } + // Invoke the delegate + RetType operator()(Param1 p1, Param2 p2) const { + return (m_Closure.GetClosureThis()->*(m_Closure.GetClosureMemPtr()))(p1, + p2); + } + // Implicit conversion to "bool" using the safe_bool idiom + private: + typedef struct SafeBoolStruct { + int a_data_pointer_to_this_is_0_on_buggy_compilers; + StaticFunctionPtr m_nonzero; + } UselessTypedef; + typedef StaticFunctionPtr SafeBoolStruct::*unspecified_bool_type; + + public: + operator unspecified_bool_type() const { + return empty() ? 0 : &SafeBoolStruct::m_nonzero; + } + // necessary to allow ==0 to work despite the safe_bool idiom + inline bool operator==(StaticFunctionPtr funcptr) { + return m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!=(StaticFunctionPtr funcptr) { + return !m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!() const { // Is it bound to anything? + return !m_Closure; + } + inline bool empty() const { return !m_Closure; } + void clear() { m_Closure.clear(); } + // Conversion to and from the DelegateMemento storage class + const DelegateMemento& GetMemento() { return m_Closure; } + void SetMemento(const DelegateMemento& any) { m_Closure.CopyFrom(this, any); } + + private: // Invoker for static functions + RetType InvokeStaticFunction(Param1 p1, Param2 p2) const { + return (*(m_Closure.GetStaticFunction()))(p1, p2); + } +}; + +// N=3 +template <class Param1, class Param2, class Param3, + class RetType = detail::DefaultVoid> +class FastDelegate3 { + private: + typedef typename detail::DefaultVoidToVoid<RetType>::type DesiredRetType; + typedef DesiredRetType (*StaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3); + typedef RetType (*UnvoidStaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3); + typedef RetType (detail::GenericClass::*GenericMemFn)(Param1 p1, Param2 p2, + Param3 p3); + typedef detail::ClosurePtr<GenericMemFn, StaticFunctionPtr, + UnvoidStaticFunctionPtr> + ClosureType; + ClosureType m_Closure; + + public: + // Typedefs to aid generic programming + typedef FastDelegate3 type; + + // Construction and comparison functions + FastDelegate3() { clear(); } + FastDelegate3(const FastDelegate3& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + void operator=(const FastDelegate3& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + bool operator==(const FastDelegate3& x) const { + return m_Closure.IsEqual(x.m_Closure); + } + bool operator!=(const FastDelegate3& x) const { + return !m_Closure.IsEqual(x.m_Closure); + } + bool operator<(const FastDelegate3& x) const { + return m_Closure.IsLess(x.m_Closure); + } + bool operator>(const FastDelegate3& x) const { + return x.m_Closure.IsLess(m_Closure); + } + // Binding to non-const member functions + template <class X, class Y> + FastDelegate3(Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + template <class X, class Y> + inline void bind(Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + // Binding to const member functions. + template <class X, class Y> + FastDelegate3(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3) const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + template <class X, class Y> + inline void bind(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3) const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + // Static functions. We convert them into a member function call. + // This constructor also provides implicit conversion + FastDelegate3(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3)) { + bind(function_to_bind); + } + // for efficiency, prevent creation of a temporary + void operator=(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3)) { + bind(function_to_bind); + } + inline void bind(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3)) { + m_Closure.bindstaticfunc(this, &FastDelegate3::InvokeStaticFunction, + function_to_bind); + } + // Invoke the delegate + RetType operator()(Param1 p1, Param2 p2, Param3 p3) const { + return (m_Closure.GetClosureThis()->*(m_Closure.GetClosureMemPtr()))(p1, p2, + p3); + } + // Implicit conversion to "bool" using the safe_bool idiom + private: + typedef struct SafeBoolStruct { + int a_data_pointer_to_this_is_0_on_buggy_compilers; + StaticFunctionPtr m_nonzero; + } UselessTypedef; + typedef StaticFunctionPtr SafeBoolStruct::*unspecified_bool_type; + + public: + operator unspecified_bool_type() const { + return empty() ? 0 : &SafeBoolStruct::m_nonzero; + } + // necessary to allow ==0 to work despite the safe_bool idiom + inline bool operator==(StaticFunctionPtr funcptr) { + return m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!=(StaticFunctionPtr funcptr) { + return !m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!() const { // Is it bound to anything? + return !m_Closure; + } + inline bool empty() const { return !m_Closure; } + void clear() { m_Closure.clear(); } + // Conversion to and from the DelegateMemento storage class + const DelegateMemento& GetMemento() { return m_Closure; } + void SetMemento(const DelegateMemento& any) { m_Closure.CopyFrom(this, any); } + + private: // Invoker for static functions + RetType InvokeStaticFunction(Param1 p1, Param2 p2, Param3 p3) const { + return (*(m_Closure.GetStaticFunction()))(p1, p2, p3); + } +}; + +// N=4 +template <class Param1, class Param2, class Param3, class Param4, + class RetType = detail::DefaultVoid> +class FastDelegate4 { + private: + typedef typename detail::DefaultVoidToVoid<RetType>::type DesiredRetType; + typedef DesiredRetType (*StaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4); + typedef RetType (*UnvoidStaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4); + typedef RetType (detail::GenericClass::*GenericMemFn)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4); + typedef detail::ClosurePtr<GenericMemFn, StaticFunctionPtr, + UnvoidStaticFunctionPtr> + ClosureType; + ClosureType m_Closure; + + public: + // Typedefs to aid generic programming + typedef FastDelegate4 type; + + // Construction and comparison functions + FastDelegate4() { clear(); } + FastDelegate4(const FastDelegate4& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + void operator=(const FastDelegate4& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + bool operator==(const FastDelegate4& x) const { + return m_Closure.IsEqual(x.m_Closure); + } + bool operator!=(const FastDelegate4& x) const { + return !m_Closure.IsEqual(x.m_Closure); + } + bool operator<(const FastDelegate4& x) const { + return m_Closure.IsLess(x.m_Closure); + } + bool operator>(const FastDelegate4& x) const { + return x.m_Closure.IsLess(m_Closure); + } + // Binding to non-const member functions + template <class X, class Y> + FastDelegate4(Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + template <class X, class Y> + inline void bind(Y* pthis, DesiredRetType (X::*function_to_bind)( + Param1 p1, Param2 p2, Param3 p3, Param4 p4)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + // Binding to const member functions. + template <class X, class Y> + FastDelegate4(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4) + const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + template <class X, class Y> + inline void bind(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4) + const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + // Static functions. We convert them into a member function call. + // This constructor also provides implicit conversion + FastDelegate4(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4)) { + bind(function_to_bind); + } + // for efficiency, prevent creation of a temporary + void operator=(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4)) { + bind(function_to_bind); + } + inline void bind(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4)) { + m_Closure.bindstaticfunc(this, &FastDelegate4::InvokeStaticFunction, + function_to_bind); + } + // Invoke the delegate + RetType operator()(Param1 p1, Param2 p2, Param3 p3, Param4 p4) const { + return (m_Closure.GetClosureThis()->*(m_Closure.GetClosureMemPtr()))( + p1, p2, p3, p4); + } + // Implicit conversion to "bool" using the safe_bool idiom + private: + typedef struct SafeBoolStruct { + int a_data_pointer_to_this_is_0_on_buggy_compilers; + StaticFunctionPtr m_nonzero; + } UselessTypedef; + typedef StaticFunctionPtr SafeBoolStruct::*unspecified_bool_type; + + public: + operator unspecified_bool_type() const { + return empty() ? 0 : &SafeBoolStruct::m_nonzero; + } + // necessary to allow ==0 to work despite the safe_bool idiom + inline bool operator==(StaticFunctionPtr funcptr) { + return m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!=(StaticFunctionPtr funcptr) { + return !m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!() const { // Is it bound to anything? + return !m_Closure; + } + inline bool empty() const { return !m_Closure; } + void clear() { m_Closure.clear(); } + // Conversion to and from the DelegateMemento storage class + const DelegateMemento& GetMemento() { return m_Closure; } + void SetMemento(const DelegateMemento& any) { m_Closure.CopyFrom(this, any); } + + private: // Invoker for static functions + RetType InvokeStaticFunction(Param1 p1, Param2 p2, Param3 p3, + Param4 p4) const { + return (*(m_Closure.GetStaticFunction()))(p1, p2, p3, p4); + } +}; + +// N=5 +template <class Param1, class Param2, class Param3, class Param4, class Param5, + class RetType = detail::DefaultVoid> +class FastDelegate5 { + private: + typedef typename detail::DefaultVoidToVoid<RetType>::type DesiredRetType; + typedef DesiredRetType (*StaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4, Param5 p5); + typedef RetType (*UnvoidStaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4, Param5 p5); + typedef RetType (detail::GenericClass::*GenericMemFn)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5); + typedef detail::ClosurePtr<GenericMemFn, StaticFunctionPtr, + UnvoidStaticFunctionPtr> + ClosureType; + ClosureType m_Closure; + + public: + // Typedefs to aid generic programming + typedef FastDelegate5 type; + + // Construction and comparison functions + FastDelegate5() { clear(); } + FastDelegate5(const FastDelegate5& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + void operator=(const FastDelegate5& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + bool operator==(const FastDelegate5& x) const { + return m_Closure.IsEqual(x.m_Closure); + } + bool operator!=(const FastDelegate5& x) const { + return !m_Closure.IsEqual(x.m_Closure); + } + bool operator<(const FastDelegate5& x) const { + return m_Closure.IsLess(x.m_Closure); + } + bool operator>(const FastDelegate5& x) const { + return x.m_Closure.IsLess(m_Closure); + } + // Binding to non-const member functions + template <class X, class Y> + FastDelegate5(Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + template <class X, class Y> + inline void bind(Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + // Binding to const member functions. + template <class X, class Y> + FastDelegate5(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5) const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + template <class X, class Y> + inline void bind(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5) const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + // Static functions. We convert them into a member function call. + // This constructor also provides implicit conversion + FastDelegate5(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5)) { + bind(function_to_bind); + } + // for efficiency, prevent creation of a temporary + void operator=(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5)) { + bind(function_to_bind); + } + inline void bind(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5)) { + m_Closure.bindstaticfunc(this, &FastDelegate5::InvokeStaticFunction, + function_to_bind); + } + // Invoke the delegate + RetType operator()(Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5) const { + return (m_Closure.GetClosureThis()->*(m_Closure.GetClosureMemPtr()))( + p1, p2, p3, p4, p5); + } + // Implicit conversion to "bool" using the safe_bool idiom + private: + typedef struct SafeBoolStruct { + int a_data_pointer_to_this_is_0_on_buggy_compilers; + StaticFunctionPtr m_nonzero; + } UselessTypedef; + typedef StaticFunctionPtr SafeBoolStruct::*unspecified_bool_type; + + public: + operator unspecified_bool_type() const { + return empty() ? 0 : &SafeBoolStruct::m_nonzero; + } + // necessary to allow ==0 to work despite the safe_bool idiom + inline bool operator==(StaticFunctionPtr funcptr) { + return m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!=(StaticFunctionPtr funcptr) { + return !m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!() const { // Is it bound to anything? + return !m_Closure; + } + inline bool empty() const { return !m_Closure; } + void clear() { m_Closure.clear(); } + // Conversion to and from the DelegateMemento storage class + const DelegateMemento& GetMemento() { return m_Closure; } + void SetMemento(const DelegateMemento& any) { m_Closure.CopyFrom(this, any); } + + private: // Invoker for static functions + RetType InvokeStaticFunction(Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5) const { + return (*(m_Closure.GetStaticFunction()))(p1, p2, p3, p4, p5); + } +}; + +// N=6 +template <class Param1, class Param2, class Param3, class Param4, class Param5, + class Param6, class RetType = detail::DefaultVoid> +class FastDelegate6 { + private: + typedef typename detail::DefaultVoidToVoid<RetType>::type DesiredRetType; + typedef DesiredRetType (*StaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4, Param5 p5, Param6 p6); + typedef RetType (*UnvoidStaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4, Param5 p5, Param6 p6); + typedef RetType (detail::GenericClass::*GenericMemFn)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6); + typedef detail::ClosurePtr<GenericMemFn, StaticFunctionPtr, + UnvoidStaticFunctionPtr> + ClosureType; + ClosureType m_Closure; + + public: + // Typedefs to aid generic programming + typedef FastDelegate6 type; + + // Construction and comparison functions + FastDelegate6() { clear(); } + FastDelegate6(const FastDelegate6& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + void operator=(const FastDelegate6& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + bool operator==(const FastDelegate6& x) const { + return m_Closure.IsEqual(x.m_Closure); + } + bool operator!=(const FastDelegate6& x) const { + return !m_Closure.IsEqual(x.m_Closure); + } + bool operator<(const FastDelegate6& x) const { + return m_Closure.IsLess(x.m_Closure); + } + bool operator>(const FastDelegate6& x) const { + return x.m_Closure.IsLess(m_Closure); + } + // Binding to non-const member functions + template <class X, class Y> + FastDelegate6(Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + template <class X, class Y> + inline void bind(Y* pthis, DesiredRetType (X::*function_to_bind)( + Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5, Param6 p6)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + // Binding to const member functions. + template <class X, class Y> + FastDelegate6(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6) + const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + template <class X, class Y> + inline void bind(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6) + const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + // Static functions. We convert them into a member function call. + // This constructor also provides implicit conversion + FastDelegate6(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6)) { + bind(function_to_bind); + } + // for efficiency, prevent creation of a temporary + void operator=(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6)) { + bind(function_to_bind); + } + inline void bind(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6)) { + m_Closure.bindstaticfunc(this, &FastDelegate6::InvokeStaticFunction, + function_to_bind); + } + // Invoke the delegate + RetType operator()(Param1 p1, Param2 p2, Param3 p3, Param4 p4, Param5 p5, + Param6 p6) const { + return (m_Closure.GetClosureThis()->*(m_Closure.GetClosureMemPtr()))( + p1, p2, p3, p4, p5, p6); + } + // Implicit conversion to "bool" using the safe_bool idiom + private: + typedef struct SafeBoolStruct { + int a_data_pointer_to_this_is_0_on_buggy_compilers; + StaticFunctionPtr m_nonzero; + } UselessTypedef; + typedef StaticFunctionPtr SafeBoolStruct::*unspecified_bool_type; + + public: + operator unspecified_bool_type() const { + return empty() ? 0 : &SafeBoolStruct::m_nonzero; + } + // necessary to allow ==0 to work despite the safe_bool idiom + inline bool operator==(StaticFunctionPtr funcptr) { + return m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!=(StaticFunctionPtr funcptr) { + return !m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!() const { // Is it bound to anything? + return !m_Closure; + } + inline bool empty() const { return !m_Closure; } + void clear() { m_Closure.clear(); } + // Conversion to and from the DelegateMemento storage class + const DelegateMemento& GetMemento() { return m_Closure; } + void SetMemento(const DelegateMemento& any) { m_Closure.CopyFrom(this, any); } + + private: // Invoker for static functions + RetType InvokeStaticFunction(Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5, Param6 p6) const { + return (*(m_Closure.GetStaticFunction()))(p1, p2, p3, p4, p5, p6); + } +}; + +// N=7 +template <class Param1, class Param2, class Param3, class Param4, class Param5, + class Param6, class Param7, class RetType = detail::DefaultVoid> +class FastDelegate7 { + private: + typedef typename detail::DefaultVoidToVoid<RetType>::type DesiredRetType; + typedef DesiredRetType (*StaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4, Param5 p5, Param6 p6, + Param7 p7); + typedef RetType (*UnvoidStaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4, Param5 p5, Param6 p6, + Param7 p7); + typedef RetType (detail::GenericClass::*GenericMemFn)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6, + Param7 p7); + typedef detail::ClosurePtr<GenericMemFn, StaticFunctionPtr, + UnvoidStaticFunctionPtr> + ClosureType; + ClosureType m_Closure; + + public: + // Typedefs to aid generic programming + typedef FastDelegate7 type; + + // Construction and comparison functions + FastDelegate7() { clear(); } + FastDelegate7(const FastDelegate7& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + void operator=(const FastDelegate7& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + bool operator==(const FastDelegate7& x) const { + return m_Closure.IsEqual(x.m_Closure); + } + bool operator!=(const FastDelegate7& x) const { + return !m_Closure.IsEqual(x.m_Closure); + } + bool operator<(const FastDelegate7& x) const { + return m_Closure.IsLess(x.m_Closure); + } + bool operator>(const FastDelegate7& x) const { + return x.m_Closure.IsLess(m_Closure); + } + // Binding to non-const member functions + template <class X, class Y> + FastDelegate7(Y* pthis, DesiredRetType (X::*function_to_bind)( + Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5, Param6 p6, Param7 p7)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + template <class X, class Y> + inline void bind(Y* pthis, DesiredRetType (X::*function_to_bind)( + Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5, Param6 p6, Param7 p7)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + // Binding to const member functions. + template <class X, class Y> + FastDelegate7(const Y* pthis, DesiredRetType (X::*function_to_bind)( + Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5, Param6 p6, Param7 p7) const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + template <class X, class Y> + inline void bind(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6, + Param7 p7) const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + // Static functions. We convert them into a member function call. + // This constructor also provides implicit conversion + FastDelegate7(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6, + Param7 p7)) { + bind(function_to_bind); + } + // for efficiency, prevent creation of a temporary + void operator=(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6, + Param7 p7)) { + bind(function_to_bind); + } + inline void bind(DesiredRetType (*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6, + Param7 p7)) { + m_Closure.bindstaticfunc(this, &FastDelegate7::InvokeStaticFunction, + function_to_bind); + } + // Invoke the delegate + RetType operator()(Param1 p1, Param2 p2, Param3 p3, Param4 p4, Param5 p5, + Param6 p6, Param7 p7) const { + return (m_Closure.GetClosureThis()->*(m_Closure.GetClosureMemPtr()))( + p1, p2, p3, p4, p5, p6, p7); + } + // Implicit conversion to "bool" using the safe_bool idiom + private: + typedef struct SafeBoolStruct { + int a_data_pointer_to_this_is_0_on_buggy_compilers; + StaticFunctionPtr m_nonzero; + } UselessTypedef; + typedef StaticFunctionPtr SafeBoolStruct::*unspecified_bool_type; + + public: + operator unspecified_bool_type() const { + return empty() ? 0 : &SafeBoolStruct::m_nonzero; + } + // necessary to allow ==0 to work despite the safe_bool idiom + inline bool operator==(StaticFunctionPtr funcptr) { + return m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!=(StaticFunctionPtr funcptr) { + return !m_Closure.IsEqualToStaticFuncPtr(funcptr); + } + inline bool operator!() const { // Is it bound to anything? + return !m_Closure; + } + inline bool empty() const { return !m_Closure; } + void clear() { m_Closure.clear(); } + // Conversion to and from the DelegateMemento storage class + const DelegateMemento& GetMemento() { return m_Closure; } + void SetMemento(const DelegateMemento& any) { m_Closure.CopyFrom(this, any); } + + private: // Invoker for static functions + RetType InvokeStaticFunction(Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5, Param6 p6, Param7 p7) const { + return (*(m_Closure.GetStaticFunction()))(p1, p2, p3, p4, p5, p6, p7); + } +}; + +// N=8 +template <class Param1, class Param2, class Param3, class Param4, class Param5, + class Param6, class Param7, class Param8, + class RetType = detail::DefaultVoid> +class FastDelegate8 { + private: + typedef typename detail::DefaultVoidToVoid<RetType>::type DesiredRetType; + typedef DesiredRetType (*StaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4, Param5 p5, Param6 p6, + Param7 p7, Param8 p8); + typedef RetType (*UnvoidStaticFunctionPtr)(Param1 p1, Param2 p2, Param3 p3, + Param4 p4, Param5 p5, Param6 p6, + Param7 p7, Param8 p8); + typedef RetType (detail::GenericClass::*GenericMemFn)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6, + Param7 p7, Param8 p8); + typedef detail::ClosurePtr<GenericMemFn, StaticFunctionPtr, + UnvoidStaticFunctionPtr> + ClosureType; + ClosureType m_Closure; + + public: + // Typedefs to aid generic programming + typedef FastDelegate8 type; + + // Construction and comparison functions + FastDelegate8() { clear(); } + FastDelegate8(const FastDelegate8& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + void operator=(const FastDelegate8& x) { + m_Closure.CopyFrom(this, x.m_Closure); + } + bool operator==(const FastDelegate8& x) const { + return m_Closure.IsEqual(x.m_Closure); + } + bool operator!=(const FastDelegate8& x) const { + return !m_Closure.IsEqual(x.m_Closure); + } + bool operator<(const FastDelegate8& x) const { + return m_Closure.IsLess(x.m_Closure); + } + bool operator>(const FastDelegate8& x) const { + return x.m_Closure.IsLess(m_Closure); + } + // Binding to non-const member functions + template <class X, class Y> + FastDelegate8(Y* pthis, DesiredRetType (X::*function_to_bind)( + Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5, Param6 p6, Param7 p7, Param8 p8)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + template <class X, class Y> + inline void bind(Y* pthis, DesiredRetType (X::*function_to_bind)( + Param1 p1, Param2 p2, Param3 p3, Param4 p4, + Param5 p5, Param6 p6, Param7 p7, Param8 p8)) { + m_Closure.bindmemfunc(detail::implicit_cast<X*>(pthis), function_to_bind); + } + // Binding to const member functions. + template <class X, class Y> + FastDelegate8(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6, + Param7 p7, Param8 p8) + const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + template <class X, class Y> + inline void bind(const Y* pthis, + DesiredRetType (X::*function_to_bind)(Param1 p1, Param2 p2, + Param3 p3, Param4 p4, + Param5 p5, Param6 p6, + Param7 p7, Param8 p8) + const) { + m_Closure.bindconstmemfunc(detail::implicit_cast<const X*>(pthis), + function_to_bind); + } + // Static functions. We convert them into a member
<TRUNCATED>
