vlc | branch: master | Rémi Denis-Courmont <[email protected]> | Thu Jun 25 23:57:25 2015 +0300| [a7a70e8163e04244d733f4745dc8cbbc7502b830] | committer: Rémi Denis-Courmont
include: restore Intel intrinsics replacement for C11 atomics > http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=a7a70e8163e04244d733f4745dc8cbbc7502b830 --- include/vlc_atomic.h | 159 ++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 155 insertions(+), 4 deletions(-) diff --git a/include/vlc_atomic.h b/include/vlc_atomic.h index 7b60d79..920d9ca 100644 --- a/include/vlc_atomic.h +++ b/include/vlc_atomic.h @@ -27,11 +27,162 @@ */ # ifndef __cplusplus -# if (__STDC_VERSION__ >= 201112L) && defined(__STDC_NO_ATOMICS__) -# error Atomic operations required! -# endif +# if (__STDC_VERSION__ >= 201112L) && !defined (__STDC_NO_ATOMICS__) /*** Native C11 atomics ***/ -# include <stdatomic.h> +# include <stdatomic.h> + +# else +/*** Intel/GCC atomics ***/ + +# define ATOMIC_FLAG_INIT false + +# define ATOMIC_VAR_INIT(value) (value) + +# define atomic_init(obj, value) \ + do { *(obj) = (value); } while(0) + +# define kill_dependency(y) \ + ((void)0) + +# define atomic_thread_fence(order) \ + __sync_synchronize() + +# define atomic_signal_fence(order) \ + ((void)0) + +# define atomic_is_lock_free(obj) \ + false + +typedef bool atomic_flag; +typedef bool atomic_bool; +typedef char atomic_char; +typedef signed char atomic_schar; +typedef unsigned char atomic_uchar; +typedef short atomic_short; +typedef unsigned short atomic_ushort; +typedef int atomic_int; +typedef unsigned int atomic_uint; +typedef long atomic_long; +typedef unsigned long atomic_ulong; +typedef long long atomic_llong; +typedef unsigned long long atomic_ullong; +//typedef char16_t atomic_char16_t; +//typedef char32_t atomic_char32_t; +typedef wchar_t atomic_wchar_t; +typedef int_least8_t atomic_int_least8_t; +typedef uint_least8_t atomic_uint_least8_t; +typedef int_least16_t atomic_int_least16_t; +typedef uint_least16_t atomic_uint_least16_t; +typedef int_least32_t atomic_int_least32_t; +typedef uint_least32_t atomic_uint_least32_t; +typedef int_least64_t atomic_int_least64_t; +typedef uint_least64_t atomic_uint_least64_t; +typedef int_fast8_t atomic_int_fast8_t; +typedef uint_fast8_t atomic_uint_fast8_t; +typedef int_fast16_t atomic_int_fast16_t; +typedef uint_fast16_t atomic_uint_fast16_t; +typedef int_fast32_t atomic_int_fast32_t; +typedef uint_fast32_t atomic_uint_fast32_t; +typedef int_fast64_t atomic_int_fast64_t; +typedef uint_fast64_t atomic_uint_fast64_t; +typedef intptr_t atomic_intptr_t; +typedef uintptr_t atomic_uintptr_t; +typedef size_t atomic_size_t; +typedef ptrdiff_t atomic_ptrdiff_t; +typedef intmax_t atomic_intmax_t; +typedef uintmax_t atomic_uintmax_t; + +# define atomic_store(object,desired) \ + do { \ + *(object) = (desired); \ + __sync_synchronize(); \ + } while (0) + +# define atomic_store_explicit(object,desired,order) \ + atomic_store(object,desired) + +# define atomic_load(object) \ + (__sync_synchronize(), *(object)) + +# define atomic_load_explicit(object,order) \ + atomic_load(object) + +# define atomic_exchange(object,desired) \ +({ \ + typeof (object) _obj = (object); \ + typeof (*object) _old; \ + do \ + _old = atomic_load(_obj); \ + while (!__sync_bool_compare_and_swap(_obj, _old, (desired))); \ + _old; \ +}) + +# define atomic_exchange_explicit(object,desired,order) \ + atomic_exchange(object,desired) + +# define atomic_compare_exchange(object,expected,desired) \ +({ \ + typeof (object) _exp = (expected); \ + typeof (*object) _old = *_exp; \ + *_exp = __sync_val_compare_and_swap((object), _old, (desired)); \ + *_exp == _old; \ +}) + +# define atomic_compare_exchange_strong(object,expected,desired) \ + atomic_compare_exchange(object, expected, desired) + +# define atomic_compare_exchange_strong_explicit(object,expected,desired,order) \ + atomic_compare_exchange_strong(object, expected, desired) + +# define atomic_compare_exchange_weak(object,expected,desired) \ + atomic_compare_exchange(object, expected, desired) + +# define atomic_compare_exchange_weak_explicit(object,expected,desired,order) \ + atomic_compare_exchange_weak(object, expected, desired) + +# define atomic_fetch_add(object,operand) \ + __sync_fetch_and_add(object, operand) + +# define atomic_fetch_add_explicit(object,operand,order) \ + atomic_fetch_add(object,operand) + +# define atomic_fetch_sub(object,operand) \ + __sync_fetch_and_sub(object, operand) + +# define atomic_fetch_sub_explicit(object,operand,order) \ + atomic_fetch_sub(object,operand) + +# define atomic_fetch_or(object,operand) \ + __sync_fetch_and_or(object, operand) + +# define atomic_fetch_or_explicit(object,operand,order) \ + atomic_fetch_or(object,operand) + +# define atomic_fetch_xor(object,operand) \ + __sync_fetch_and_sub(object, operand) + +# define atomic_fetch_xor_explicit(object,operand,order) \ + atomic_fetch_sub(object,operand) + +# define atomic_fetch_and(object,operand) \ + __sync_fetch_and_and(object, operand) + +# define atomic_fetch_and_explicit(object,operand,order) \ + atomic_fetch_and(object,operand) + +# define atomic_flag_test_and_set(object) \ + atomic_exchange(object, true) + +# define atomic_flag_test_and_set_explicit(object,order) \ + atomic_flag_test_and_set(object) + +# define atomic_flag_clear(object) \ + atomic_store(object, false) + +# define atomic_flag_clear_explicit(object,order) \ + atomic_flag_clear(object) + +# endif /* !C11 */ typedef atomic_uint_least32_t vlc_atomic_float; 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