diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 13:54:38 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 13:54:38 +0000 |
commit | 8c1ab65c0f548d20b7f177bdb736daaf603340e1 (patch) | |
tree | df55b7e75bf43f2bf500845b105afe3ac3a5157e /libc-top-half/musl/src/thread/pthread_rwlock_timedwrlock.c | |
parent | Initial commit. (diff) | |
download | wasi-libc-upstream/0.0_git20221206.8b7148f.tar.xz wasi-libc-upstream/0.0_git20221206.8b7148f.zip |
Adding upstream version 0.0~git20221206.8b7148f.upstream/0.0_git20221206.8b7148f
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'libc-top-half/musl/src/thread/pthread_rwlock_timedwrlock.c')
-rw-r--r-- | libc-top-half/musl/src/thread/pthread_rwlock_timedwrlock.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/thread/pthread_rwlock_timedwrlock.c b/libc-top-half/musl/src/thread/pthread_rwlock_timedwrlock.c new file mode 100644 index 0000000..d77706e --- /dev/null +++ b/libc-top-half/musl/src/thread/pthread_rwlock_timedwrlock.c @@ -0,0 +1,25 @@ +#include "pthread_impl.h" + +int __pthread_rwlock_timedwrlock(pthread_rwlock_t *restrict rw, const struct timespec *restrict at) +{ + int r, t; + + r = pthread_rwlock_trywrlock(rw); + if (r != EBUSY) return r; + + int spins = 100; + while (spins-- && rw->_rw_lock && !rw->_rw_waiters) a_spin(); + + while ((r=__pthread_rwlock_trywrlock(rw))==EBUSY) { + if (!(r=rw->_rw_lock)) continue; + t = r | 0x80000000; + a_inc(&rw->_rw_waiters); + a_cas(&rw->_rw_lock, r, t); + r = __timedwait(&rw->_rw_lock, t, CLOCK_REALTIME, at, rw->_rw_shared^128); + a_dec(&rw->_rw_waiters); + if (r && r != EINTR) return r; + } + return r; +} + +weak_alias(__pthread_rwlock_timedwrlock, pthread_rwlock_timedwrlock); |