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server: use gcc builtin for atomic get/set bit

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This commit is contained in:
Christophe Fergeau 2011-04-22 13:31:48 +02:00
parent 1caee1f216
commit f88dc6eecb
1 changed files with 4 additions and 2 deletions
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6
server/red_worker.h
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@ -23,12 +23,14 @@
static inline void set_bit(int index, uint32_t *addr)
{
__asm__ __volatile__ ("lock btsl %1, %0": : "m" (*addr), "r" (index));
uint32_t mask = 1 << index;
__sync_or_and_fetch(addr, mask);
}
static inline void clear_bit(int index, uint32_t *addr)
{
__asm__ __volatile__ ("lock btrl %1, %0": : "m" (*addr), "r" (index));
uint32_t mask = ~(1 << index);
__sync_and_and_fetch(addr, mask);
}
static inline int test_bit(int index, uint32_t val)