26 lines
708 B
C
26 lines
708 B
C
#include "pthread_impl.h"
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int __pthread_rwlock_timedrdlock(pthread_rwlock_t *restrict rw, const struct timespec *restrict at)
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{
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int r, t;
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r = pthread_rwlock_tryrdlock(rw);
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if (r != EBUSY) return r;
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int spins = 100;
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while (spins-- && rw->_rw_lock && !rw->_rw_waiters) a_spin();
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while ((r=__pthread_rwlock_tryrdlock(rw))==EBUSY) {
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if (!(r=rw->_rw_lock) || (r&0x7fffffff)!=0x7fffffff) continue;
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t = r | 0x80000000;
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a_inc(&rw->_rw_waiters);
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a_cas(&rw->_rw_lock, r, t);
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r = __timedwait(&rw->_rw_lock, t, CLOCK_REALTIME, at, rw->_rw_shared^128);
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a_dec(&rw->_rw_waiters);
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if (r && r != EINTR) return r;
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}
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return r;
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}
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weak_alias(__pthread_rwlock_timedrdlock, pthread_rwlock_timedrdlock);
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