71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/*
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* mutex7e.c
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*
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* Tests PTHREAD_MUTEX_ERRORCHECK mutex type.
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* Thread locks and then trylocks mutex (attempted recursive lock).
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* Trylock should fail with an EBUSY error.
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* The second unlock attempt should fail with an EPERM error.
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*
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* Depends on API functions:
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* pthread_create()
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* pthread_join()
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* pthread_mutexattr_init()
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* pthread_mutexattr_destroy()
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* pthread_mutexattr_settype()
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* pthread_mutexattr_gettype()
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* pthread_mutex_init()
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* pthread_mutex_destroy()
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* pthread_mutex_lock()
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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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static pthread_mutexattr_t mxAttr;
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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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assert(pthread_mutex_unlock(&mutex) == EPERM);
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return (void *) 555;
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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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int result = 0;
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int mxType = -1;
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assert(pthread_mutexattr_init(&mxAttr) == 0);
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assert(pthread_mutexattr_settype(&mxAttr, PTHREAD_MUTEX_ERRORCHECK) == 0);
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assert(pthread_mutexattr_gettype(&mxAttr, &mxType) == 0);
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assert(mxType == PTHREAD_MUTEX_ERRORCHECK);
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assert(pthread_mutex_init(&mutex, &mxAttr) == 0);
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assert(pthread_create(&t, NULL, locker, NULL) == 0);
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assert(pthread_join(t, (void **) &result) == 0);
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assert(result == 555);
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assert(lockCount == 2);
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assert(pthread_mutex_destroy(&mutex) == 0);
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assert(pthread_mutexattr_destroy(&mxAttr) == 0);
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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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