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736618054c
Default mutex type is PTHREAD_MUTEX_NORMAL. Attempting to unlock an unowned mutex of that type is specified as undefined behaviour, not returning EPERM. mutex7e verfies that attempting to unlock an unowned mutex of type PTHREAD_MUTEX_ERRORCHECK returns EPERM.
50 lines
868 B
C
50 lines
868 B
C
/*
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* mutex7.c
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*
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* Test the default (type not set) mutex type.
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* Should be the same as PTHREAD_MUTEX_NORMAL.
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* Thread locks then trylocks mutex (attempted recursive lock).
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* The thread should lock first time and EBUSY second time.
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*
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* Depends on API functions:
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* pthread_mutex_lock()
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* pthread_mutex_trylock()
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* pthread_mutex_unlock()
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*/
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#include "test.h"
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static int lockCount = 0;
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static pthread_mutex_t mutex;
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void * locker(void * arg)
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{
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assert(pthread_mutex_lock(&mutex) == 0);
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lockCount++;
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assert(pthread_mutex_trylock(&mutex) == EBUSY);
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lockCount++;
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assert(pthread_mutex_unlock(&mutex) == 0);
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return 0;
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}
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int
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main()
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{
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pthread_t t;
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assert(pthread_mutex_init(&mutex, NULL) == 0);
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assert(pthread_create(&t, NULL, locker, NULL) == 0);
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Sleep(1000);
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assert(lockCount == 2);
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exit(0);
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/* Never reached */
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return 0;
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}
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