73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
/*
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* mutex6n.c
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*
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* Tests PTHREAD_MUTEX_NORMAL mutex type.
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* Thread locks mutex twice (recursive lock).
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* The thread should deadlock.
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*
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* Depends on API functions:
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* pthread_create()
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* pthread_mutexattr_init()
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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_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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/* Should wait here (deadlocked) */
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assert(pthread_mutex_lock(&mutex) == 0);
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lockCount++;
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assert(pthread_mutex_unlock(&mutex) == 0);
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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 mxType = -1;
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assert(pthread_mutexattr_init(&mxAttr) == 0);
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assert(pthread_mutexattr_settype(&mxAttr, PTHREAD_MUTEX_NORMAL) == 0);
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assert(pthread_mutexattr_gettype(&mxAttr, &mxType) == 0);
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assert(mxType == PTHREAD_MUTEX_NORMAL);
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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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Sleep(1000);
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assert(lockCount == 1);
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/*
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* Should succeed even though we don't own the lock
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* because FAST mutexes don't check ownership.
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*/
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assert(pthread_mutex_unlock(&mutex) == 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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