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202e256aa0471de4e20d21696b312191e6fa703a
[oweals/musl.git]
/
src
/
thread
/
pthread_rwlock_trywrlock.c
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#include "pthread_impl.h"
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int pthread_rwlock_trywrlock(pthread_rwlock_t *rw)
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{
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if (a_xchg(&rw->_rw_wrlock, 1))
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return EBUSY;
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if (rw->_rw_readers) {
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a_store(&rw->_rw_wrlock, 0);
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return EBUSY;
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}
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rw->_rw_owner = pthread_self()->tid;
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return 0;
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}