diff options
Diffstat (limited to 'src/thread/pthread_rwlock_trywrlock.c')
| -rw-r--r-- | src/thread/pthread_rwlock_trywrlock.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/thread/pthread_rwlock_trywrlock.c b/src/thread/pthread_rwlock_trywrlock.c new file mode 100644 index 00000000..c029b874 --- /dev/null +++ b/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->__wrlock, 1)) + return EAGAIN; + if (rw->__readers) { + a_store(&rw->__wrlock, 0); + return EAGAIN; + } + rw->__owner = pthread_self()->tid; + return 0; +} |