diff options
Diffstat (limited to '05/musl-0.6.0/src/thread/pthread_mutex_unlock.c')
| -rw-r--r-- | 05/musl-0.6.0/src/thread/pthread_mutex_unlock.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/05/musl-0.6.0/src/thread/pthread_mutex_unlock.c b/05/musl-0.6.0/src/thread/pthread_mutex_unlock.c new file mode 100644 index 0000000..0275eb5 --- /dev/null +++ b/05/musl-0.6.0/src/thread/pthread_mutex_unlock.c @@ -0,0 +1,19 @@ +#include "pthread_impl.h" + +int pthread_mutex_unlock(pthread_mutex_t *m) +{ + if (m->_m_type == PTHREAD_MUTEX_RECURSIVE) { + if (a_fetch_add(&m->_m_lock, -1)==1 && m->_m_waiters) + __wake(&m->_m_lock, 1, 0); + return 0; + } + + if (m->_m_type == PTHREAD_MUTEX_ERRORCHECK + && m->_m_owner != pthread_self()->tid) + return EPERM; + + m->_m_owner = 0; + m->_m_lock = 0; + if (m->_m_waiters) __wake(&m->_m_lock, 1, 0); + return 0; +} |