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https://github.com/fluencelabs/musl
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18 lines
458 B
C
18 lines
458 B
C
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#include "pthread_impl.h"
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int pthread_rwlock_timedwrlock(pthread_rwlock_t *rw, const struct timespec *at)
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{
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int nr, *p, w=0;
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while (pthread_rwlock_trywrlock(rw)==EAGAIN) {
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if (!w) a_inc(&rw->__waiters), w++;
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if ((nr=rw->__readers)) p = &rw->__readers;
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else nr=1, p = &rw->__wrlock;
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if (__timedwait(p, nr, CLOCK_REALTIME, at, 0)==ETIMEDOUT) {
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if (w) a_dec(&rw->__waiters);
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return ETIMEDOUT;
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}
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}
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if (w) a_dec(&rw->__waiters);
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return 0;
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}
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