diff options
Diffstat (limited to '05/musl-0.6.0/src/thread/pthread_rwlock_trywrlock.c')
| -rw-r--r-- | 05/musl-0.6.0/src/thread/pthread_rwlock_trywrlock.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/05/musl-0.6.0/src/thread/pthread_rwlock_trywrlock.c b/05/musl-0.6.0/src/thread/pthread_rwlock_trywrlock.c new file mode 100644 index 0000000..1bcf7c9 --- /dev/null +++ b/05/musl-0.6.0/src/thread/pthread_rwlock_trywrlock.c @@ -0,0 +1,13 @@ +#include "pthread_impl.h" + +int pthread_rwlock_trywrlock(pthread_rwlock_t *rw) +{ + if (a_xchg(&rw->_rw_wrlock, 1)) + return EAGAIN; + if (rw->_rw_readers) { + a_store(&rw->_rw_wrlock, 0); + return EAGAIN; + } + rw->_rw_owner = pthread_self()->tid; + return 0; +} |