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path: root/src/thread/pthread_rwlock_timedwrlock.c
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Diffstat (limited to 'src/thread/pthread_rwlock_timedwrlock.c')
-rw-r--r--src/thread/pthread_rwlock_timedwrlock.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/thread/pthread_rwlock_timedwrlock.c b/src/thread/pthread_rwlock_timedwrlock.c
new file mode 100644
index 00000000..9f749648
--- /dev/null
+++ b/src/thread/pthread_rwlock_timedwrlock.c
@@ -0,0 +1,17 @@
+#include "pthread_impl.h"
+
+int pthread_rwlock_timedwrlock(pthread_rwlock_t *rw, const struct timespec *at)
+{
+ int nr, *p, w=0;
+ while (pthread_rwlock_trywrlock(rw)==EAGAIN) {
+ if (!w) a_inc(&rw->__waiters), w++;
+ if ((nr=rw->__readers)) p = &rw->__readers;
+ else nr=1, p = &rw->__wrlock;
+ if (__timedwait(p, nr, CLOCK_REALTIME, at, 0)==ETIMEDOUT) {
+ if (w) a_dec(&rw->__waiters);
+ return ETIMEDOUT;
+ }
+ }
+ if (w) a_dec(&rw->__waiters);
+ return 0;
+}