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#include "pthread_impl.h" int pthread_mutex_unlock(pthread_mutex_t *m) { pthread_t self; int waiters = m->_m_waiters; int cont; int robust = 0; if (m->_m_type != PTHREAD_MUTEX_NORMAL) { if (!m->_m_lock) return EPERM; self = pthread_self(); if ((m->_m_lock&0x1fffffff) != self->tid) return EPERM; if ((m->_m_type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count) return m->_m_count--, 0; if (m->_m_type >= 4) { robust = 1; self->robust_list.pending = &m->_m_next; *(void **)m->_m_prev = m->_m_next; if (m->_m_next) ((void **)m->_m_next)[-1] = m->_m_prev; } } cont = a_swap(&m->_m_lock, 0); if (robust) self->robust_list.pending = 0; if (waiters || cont<0) __wake(&m->_m_lock, 1, 0); return 0; } |