mirror of
https://github.com/fluencelabs/musl
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400c5e5c83
to deal with the fact that the public headers may be used with pre-c99 compilers, __restrict is used in place of restrict, and defined appropriately for any supported compiler. we also avoid the form [restrict] since older versions of gcc rejected it due to a bug in the original c99 standard, and instead use the form *restrict.
24 lines
423 B
C
24 lines
423 B
C
#include <semaphore.h>
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#include "pthread_impl.h"
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static void cleanup(void *p)
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{
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a_dec(p);
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}
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int sem_timedwait(sem_t *restrict sem, const struct timespec *restrict at)
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{
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while (sem_trywait(sem)) {
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int r;
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a_inc(sem->__val+1);
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a_cas(sem->__val, 0, -1);
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r = __timedwait(sem->__val, -1, CLOCK_REALTIME, at, cleanup, sem->__val+1, 0);
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a_dec(sem->__val+1);
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if (r) {
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errno = r;
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return -1;
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}
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}
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return 0;
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}
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