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Diffstat (limited to '')
-rw-r--r-- | libc-top-half/musl/src/thread/pthread_mutex_consistent.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/thread/pthread_mutex_consistent.c b/libc-top-half/musl/src/thread/pthread_mutex_consistent.c new file mode 100644 index 0000000..27c74e5 --- /dev/null +++ b/libc-top-half/musl/src/thread/pthread_mutex_consistent.c @@ -0,0 +1,14 @@ +#include "pthread_impl.h" +#include "atomic.h" + +int pthread_mutex_consistent(pthread_mutex_t *m) +{ + int old = m->_m_lock; + int own = old & 0x3fffffff; + if (!(m->_m_type & 4) || !own || !(old & 0x40000000)) + return EINVAL; + if (own != __pthread_self()->tid) + return EPERM; + a_and(&m->_m_lock, ~0x40000000); + return 0; +} |