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fix broken spinlock due to miscompilation

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actually this trick also seems to have made the uncontended case slower.
This commit is contained in:
Rich Felker 2011-03-28 22:22:54 -04:00
commit 117581ca69
1 changed files with 1 additions and 1 deletions
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2
src/thread/pthread_spin_lock.c
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@ -2,6 +2,6 @@
int pthread_spin_lock(pthread_spinlock_t *s) int pthread_spin_lock(pthread_spinlock_t *s)
{ {
while (*s || a_xchg(s, 1)); while (a_xchg(s, 1));
return 0; return 0;
} }