df15168cf8
prior to version 1.1.0, the difference between pthread_self (the public function) and __pthread_self (the internal macro or inline function) was that the former would lazily initialize the thread pointer if it was not already initialized, whereas the latter would crash in this case. since lazy initialization is no longer supported, use of pthread_self no longer makes sense; it simply generates larger, slower code.
37 lines
847 B
C
37 lines
847 B
C
#include "pthread_impl.h"
|
|
|
|
void __vm_lock_impl(int);
|
|
void __vm_unlock_impl(void);
|
|
|
|
int pthread_mutex_unlock(pthread_mutex_t *m)
|
|
{
|
|
pthread_t self;
|
|
int waiters = m->_m_waiters;
|
|
int cont;
|
|
int robust = 0;
|
|
|
|
if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
|
|
if (!m->_m_lock)
|
|
return EPERM;
|
|
self = __pthread_self();
|
|
if ((m->_m_lock&0x1fffffff) != self->tid)
|
|
return EPERM;
|
|
if ((m->_m_type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count)
|
|
return m->_m_count--, 0;
|
|
if (m->_m_type >= 4) {
|
|
robust = 1;
|
|
self->robust_list.pending = &m->_m_next;
|
|
*(void **)m->_m_prev = m->_m_next;
|
|
if (m->_m_next) ((void **)m->_m_next)[-1] = m->_m_prev;
|
|
__vm_lock_impl(+1);
|
|
}
|
|
}
|
|
cont = a_swap(&m->_m_lock, 0);
|
|
if (robust) {
|
|
self->robust_list.pending = 0;
|
|
__vm_unlock_impl();
|
|
}
|
|
if (waiters || cont<0)
|
|
__wake(&m->_m_lock, 1, 0);
|
|
return 0;
|
|
}
|