44 lines
684 B
C
44 lines
684 B
C
/*
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* rwlock4.c
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*
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* Declare a static rwlock object, rdlock it, trywrlock it,
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* and then unlock it again.
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*
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* Depends on API functions:
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* pthread_rwlock_rdlock()
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* pthread_rwlock_trywrlock()
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* pthread_rwlock_unlock()
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*/
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#include "test.h"
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pthread_rwlock_t rwlock1 = PTHREAD_RWLOCK_INITIALIZER;
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static int washere = 0;
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void * func(void * arg)
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{
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assert(pthread_rwlock_trywrlock(&rwlock1) == EBUSY);
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washere = 1;
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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_rwlock_rdlock(&rwlock1) == 0);
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assert(pthread_create(&t, NULL, func, NULL) == 0);
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Sleep(2000);
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assert(pthread_rwlock_unlock(&rwlock1) == 0);
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assert(washere == 1);
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return 0;
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}
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