48 lines
996 B
C
48 lines
996 B
C
#include "LockFreeLIFO.h"
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#include "foundation/atomics.h"
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/* win32 implementation */
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void lifo_init(lifo_t *lifo)
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{
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lifo->head = 0;
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lifo->aba = 0;
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}
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#if 0 // defined in LockFreeLIFO.asm
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void lifo_push(lifo_t *lifo, queue_node_t *cl)
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{
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queue_node_t *new_head = cl;
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queue_node_t *old_head = 0;
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do
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{
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old_head = (queue_node_t *)lifo->head;
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new_head->Next = old_head;
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} while (!nx_atomic_cmpxchg_pointer(old_head, new_head, (void * volatile *)&lifo->head));
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}
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queue_node_t *lifo_pop(lifo_t *lifo)
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{
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lifo_t old_head, new_head;
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do
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{
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old_head = *lifo;
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if (!old_head.head)
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return 0;
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new_head.head = old_head.head->Next;
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new_head.aba = old_head.aba+1;
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} while (!nx_atomic_cmpxchg2(*(int64_t *)&old_head, *(int64_t *)&new_head, (volatile int64_t *)&lifo->head));
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return (queue_node_t *)old_head.head;
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}
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#endif
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queue_node_t *lifo_malloc(size_t bytes)
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{
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return _aligned_malloc(bytes, MEMORY_ALLOCATION_ALIGNMENT);
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}
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void lifo_free(queue_node_t *ptr)
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{
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_aligned_free(ptr);
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} |