mirror of
https://github.com/fluencelabs/musl
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df7d0dfb9c
The intent of this is to avoid name space pollution of the C threads implementation. This has two sides to it. First we have to provide symbols that wouldn't pollute the name space for the C threads implementation. Second we have to clean up some internal uses of POSIX functions such that they don't implicitly drag in such symbols.
35 lines
921 B
C
35 lines
921 B
C
#include "pthread_impl.h"
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int __pthread_mutex_timedlock(pthread_mutex_t *restrict m, const struct timespec *restrict at)
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{
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if ((m->_m_type&15) == PTHREAD_MUTEX_NORMAL
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&& !a_cas(&m->_m_lock, 0, EBUSY))
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return 0;
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int r, t, priv = (m->_m_type & 128) ^ 128;
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r = pthread_mutex_trylock(m);
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if (r != EBUSY) return r;
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int spins = 100;
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while (spins-- && m->_m_lock && !m->_m_waiters) a_spin();
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while ((r=pthread_mutex_trylock(m)) == EBUSY) {
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if (!(r=m->_m_lock) || ((r&0x40000000) && (m->_m_type&4)))
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continue;
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if ((m->_m_type&3) == PTHREAD_MUTEX_ERRORCHECK
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&& (r&0x7fffffff) == __pthread_self()->tid)
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return EDEADLK;
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a_inc(&m->_m_waiters);
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t = r | 0x80000000;
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a_cas(&m->_m_lock, r, t);
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r = __timedwait(&m->_m_lock, t, CLOCK_REALTIME, at, 0, 0, priv);
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a_dec(&m->_m_waiters);
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if (r && r != EINTR) break;
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}
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return r;
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}
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weak_alias(__pthread_mutex_timedlock, pthread_mutex_timedlock);
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