Rich Felker
e882756311
this allows sys/types.h to provide the pthread types, as required by POSIX. this design also facilitates forcing ABI-compatible sizes in the arch-specific alltypes.h, while eliminating the need for developers changing the internals of the pthread types to poke around with arch-specific headers they may not be able to test.
18 lines
470 B
C
18 lines
470 B
C
#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->_rw_waiters), w++;
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if ((nr=rw->_rw_readers)) p = &rw->_rw_readers;
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else nr=1, p = &rw->_rw_wrlock;
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if (__timedwait(p, nr, CLOCK_REALTIME, at, 0)==ETIMEDOUT) {
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if (w) a_dec(&rw->_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->_rw_waiters);
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return 0;
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}
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