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/*
* mutex6d.c
*
* Tests PTHREAD_MUTEX_DEFAULT mutex type.
* Thread locks mutex twice (recursive lock).
* The thread should deadlock.
*
* Depends on API functions:
* pthread_create()
* pthread_mutexattr_init()
* pthread_mutexattr_settype()
* pthread_mutexattr_gettype()
* pthread_mutex_init()
* pthread_mutex_lock()
* pthread_mutex_unlock()
*/
#include "test.h"
static int lockCount = 0;
static pthread_mutex_t mutex;
static pthread_mutexattr_t mxAttr;
void * locker(void * arg)
{
assert(pthread_mutex_lock(&mutex) == 0);
lockCount++;
/* Should wait here (deadlocked) */
assert(pthread_mutex_lock(&mutex) == 0);
lockCount++;
assert(pthread_mutex_unlock(&mutex) == 0);
return (void *) 555;
}
int
main()
{
pthread_t t;
int mxType = -1;
assert(pthread_mutexattr_init(&mxAttr) == 0);
assert(pthread_mutexattr_settype(&mxAttr, PTHREAD_MUTEX_DEFAULT) == 0);
assert(pthread_mutexattr_gettype(&mxAttr, &mxType) == 0);
assert(mxType == PTHREAD_MUTEX_NORMAL);
assert(pthread_mutex_init(&mutex, &mxAttr) == 0);
assert(pthread_create(&t, NULL, locker, NULL) == 0);
Sleep(1000);
assert(lockCount == 1);
/*
* Should succeed even though we don't own the lock
* because FAST mutexes don't check ownership.
*/
assert(pthread_mutex_unlock(&mutex) == 0);
Sleep (1000);
assert(lockCount == 2);
exit(0);
/* Never reached */
return 0;
}
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