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remove implicit include of sys/sysmacros.h from sys/types.h
[musl]
/
src
/
thread
/
pthread_mutex_unlock.c
diff --git
a/src/thread/pthread_mutex_unlock.c
b/src/thread/pthread_mutex_unlock.c
index
02da92a
..
b66423e
100644
(file)
--- a/
src/thread/pthread_mutex_unlock.c
+++ b/
src/thread/pthread_mutex_unlock.c
@@
-7,13
+7,19
@@
int __pthread_mutex_unlock(pthread_mutex_t *m)
int cont;
int type = m->_m_type & 15;
int priv = (m->_m_type & 128) ^ 128;
int cont;
int type = m->_m_type & 15;
int priv = (m->_m_type & 128) ^ 128;
+ int new = 0;
+ int old;
if (type != PTHREAD_MUTEX_NORMAL) {
self = __pthread_self();
if (type != PTHREAD_MUTEX_NORMAL) {
self = __pthread_self();
- if ((m->_m_lock&0x7fffffff) != self->tid)
+ old = m->_m_lock;
+ int own = old & 0x3fffffff;
+ if (own != self->tid)
return EPERM;
if ((type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count)
return m->_m_count--, 0;
return EPERM;
if ((type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count)
return m->_m_count--, 0;
+ if ((type&4) && (old&0x40000000))
+ new = 0x7fffffff;
if (!priv) {
self->robust_list.pending = &m->_m_next;
__vm_lock();
if (!priv) {
self->robust_list.pending = &m->_m_next;
__vm_lock();
@@
-24,7
+30,16
@@
int __pthread_mutex_unlock(pthread_mutex_t *m)
if (next != &self->robust_list.head) *(volatile void *volatile *)
((char *)next - sizeof(void *)) = prev;
}
if (next != &self->robust_list.head) *(volatile void *volatile *)
((char *)next - sizeof(void *)) = prev;
}
- cont = a_swap(&m->_m_lock, (type & 8) ? 0x40000000 : 0);
+ if (type&8) {
+ if (old<0 || a_cas(&m->_m_lock, old, new)!=old) {
+ if (new) a_store(&m->_m_waiters, -1);
+ __syscall(SYS_futex, &m->_m_lock, FUTEX_UNLOCK_PI|priv);
+ }
+ cont = 0;
+ waiters = 0;
+ } else {
+ cont = a_swap(&m->_m_lock, new);
+ }
if (type != PTHREAD_MUTEX_NORMAL && !priv) {
self->robust_list.pending = 0;
__vm_unlock();
if (type != PTHREAD_MUTEX_NORMAL && !priv) {
self->robust_list.pending = 0;
__vm_unlock();