hey all I am applying a volatile keyword on IntPtr like this private volatile IntPtr mNativeCancelRequest; And compiling against Mono 2.4 I get this error. error CS0677: `mNativeCancelRequest': A volatile field cannot be of the type `System.IntPtr' This seems like a bug according to the standard. As it explicitly allow this to be done. Is this a bug in the gmcs compiler ? Should I file a bug report ?
Thanks Raj 10.5.3 Volatile fields When a field-declaration includes a volatile modifier, the fields introduced by that declaration are volatile fields. For non-volatile fields, optimization techniques that reorder instructions can lead to unexpected and unpredictable results in multi-threaded programs that access fields without synchronization such as that provided by the lock-statement (§8.12). These optimizations can be performed by the compiler, by the runtime system, or by hardware. For volatile fields, such reordering optimizations are restricted: A read of a volatile field is called a volatile read. A volatile read has “acquire semantics”; that is, it is guaranteed to occur prior to any references to memory that occur after it in the instruction sequence. A write of a volatile field is called a volatile write. A volatile write has “release semantics”; that is, it is guaranteed to happen after any memory references prior to the write instruction in the instruction sequence. These restrictions ensure that all threads will observe volatile writes performed by any other thread in the order in which they were performed. A conforming implementation is not required to provide a single total ordering of volatile writes as seen from all threads of execution. The type of a volatile field must be one of the following: A reference-type. The type byte, sbyte, short, ushort, int, uint, char, float, bool, System.IntPtr, or System.UIntPtr. An enum-type having an enum base type of byte, sbyte, short, ushort, int, or uint. -- View this message in context: http://www.nabble.com/Applying-volatile-keyword-on-IntPtr-tp24076358p24076358.html Sent from the Mono - General mailing list archive at Nabble.com. _______________________________________________ Mono-list maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-list
