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OSAtomicEnqueue operation implementation
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libmac/libc/OSAtomic.cpp
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libmac/libc/OSAtomic.cpp
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// http://i.stack.imgur.com/FSBA3.png
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void OSAtomicEnqueue(OSQueueHead *list, void *_new, size_t offset)
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{
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LIBC_STUB();
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long* newNext = reinterpret_cast<long*>(reinterpret_cast<char*>(_new) + offset);
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*newNext = 0;
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// If the queue is not empty
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if (!__sync_bool_compare_and_swap(list->p, 0, _new))
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{
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void* prevTop = __sync_lock_test_and_set(list->p, _new);
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*newNext = prevTop; // FIXME: this place may cause races with OSAtomicDequeue
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}
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}
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void* OSAtomicDequeue(OSQueueHead *list, size_t offset)