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initial check-in, version 0.5.0

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This commit is contained in:
Rich Felker
2011-02-12 00:22:29 -05:00
commit 0b44a0315b
1021 changed files with 45711 additions and 0 deletions
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28
src/thread/pthread_mutex_trylock.c Normal file
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#include "pthread_impl.h"
int pthread_mutex_trylock(pthread_mutex_t *m)
{
if (m->__type == PTHREAD_MUTEX_RECURSIVE) {
pthread_t self = pthread_self();
if (m->__owner == self) {
if ((unsigned)m->__lock >= INT_MAX) return EAGAIN;
a_inc(&m->__lock);
return 0;
}
if (a_fetch_add(&m->__lock, 1)) {
if (a_fetch_add(&m->__lock, -1)==1 && m->__waiters)
__wake(&m->__lock, 1, 0);
return EBUSY;
}
m->__owner = self;
return 0;
}
if (a_xchg(&m->__lock, 1))
if (m->__type == PTHREAD_MUTEX_ERRORCHECK
&& m->__owner == pthread_self()) return EDEADLK;
else return EBUSY;
if (m->__type == PTHREAD_MUTEX_ERRORCHECK)
m->__owner = pthread_self();
return 0;
}