blob: 0c3ade9e8f80793249668564059bf1ae172ebb71 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
#include <unistd.h>
#include <sched.h>
#include <errno.h>
#include <pthread.h>
#include "thread_internal.h"
/* will never return EINVAL ! */
int pthread_mutex_lock(pthread_mutex_t *mutex)
{
_pthread_descr this;
__THREAD_INIT();
this = __thread_self();
if (this!=mutex->owner) {
/* wait for mutex to free */
__pthread_lock(&(mutex->lock));
mutex->owner=this;
}
else if (mutex->kind==PTHREAD_MUTEX_ERRORCHECK_NP)
{
(*(__errno_location()))=EDEADLK;
return -1;
}
if (mutex->kind==PTHREAD_MUTEX_RECURSIVE_NP) ++(mutex->count);
return 0;
}
|