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/*
* mutex7d.c
*
* Test the default (type not set) mutex type.
* Should be the same as PTHREAD_MUTEX_ERRORCHECK.
* Thread locks then trylocks mutex (attempted recursive lock).
* The thread should lock first time and EBUSY second time.
*
* Depends on API functions:
* pthread_mutex_lock()
* pthread_mutex_trylock()
* pthread_mutex_unlock()
*/
#include "test.h"
static int lockCount = 0;
static pthread_mutex_t mutex;
void * locker(void * arg)
{
assert(pthread_mutex_lock(&mutex) == 0);
lockCount++;
assert(pthread_mutex_trylock(&mutex) == EBUSY);
lockCount++;
assert(pthread_mutex_unlock(&mutex) == 0);
assert(pthread_mutex_unlock(&mutex) == EPERM);
return 0;
}
int
main()
{
int result = 0;
pthread_t t;
assert(pthread_mutex_init(&mutex, NULL) == 0);
assert(pthread_create(&t, NULL, locker, NULL) == 0);
assert(pthread_join(t, (void **) &result) == 0);
assert(lockCount == 2);
exit(0);
/* Never reached */
return 0;
}
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