On Dec 6, 2011, at 5:28 PM, koko wrote: > In windows we have: > > LONG volatile Mylock = 0; > InterlockedIncrement(&Mylock); > InterlockedDecrement(&Mylock); > > > What should these be replaced with for OSX as in : > > #ifndef MAC > LONG volatile Mylock = 0; > #else > // Mac > #endif > > > void SetLock() > { > // EnterCriticalSection(&m_cs); > #ifndef MAC > while(Mylock){Sleep(0);}; // Give up timeslice > InterlockedIncrement(&Mylock); > #else > // Mac > #endif > } > > > void FreeLock() > { > // LeaveCriticalSection(&m_cs); > #ifndef MAC > InterlockedDecrement(&Mylock); > #else > // Mac > #endif > }
Well, the use of atomic operations to implement a lock is pretty poor code. You should use a real locking primitive to achieve that. In Cocoa, look at NSLock and/or NSRecursiveLock. If you can't rely on Cocoa, use pthread's mutexes. Read this <https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Multithreading/ThreadSafety/ThreadSafety.html> to learn more about synchronization primitives. If you just want atomic increment and decrement, that page has a link to the man page for the relevant functions. But don't do a blind reimplementation of the poor code you're porting. Use the proper synchronization primitives. Regards, Ken _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com