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#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) {
if (mutex->kind==PTHREAD_MUTEX_ERRORCHECK_NP)
return EDEADLK;
if (mutex->kind==PTHREAD_MUTEX_RECURSIVE_NP) {
++(mutex->count);
return 0;
}
}
/* wait for mutex to free */
__pthread_lock(&(mutex->lock));
mutex->owner=this;
return 0;
}
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