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- #include <stdlib.h>
- #include <errno.h>
- #include <limits.h>
- #include "pthread.h"
- #include "implement.h"
- int
- pthread_rwlock_destroy (pthread_rwlock_t * rwlock)
- {
- pthread_rwlock_t rwl;
- int result = 0, result1 = 0, result2 = 0;
- if (rwlock == NULL || *rwlock == NULL)
- {
- return EINVAL;
- }
- if (*rwlock != PTHREAD_RWLOCK_INITIALIZER)
- {
- rwl = *rwlock;
- if (rwl->nMagic != PTE_RWLOCK_MAGIC)
- {
- return EINVAL;
- }
- if ((result = pthread_mutex_lock (&(rwl->mtxExclusiveAccess))) != 0)
- {
- return result;
- }
- if ((result =
- pthread_mutex_lock (&(rwl->mtxSharedAccessCompleted))) != 0)
- {
- (void) pthread_mutex_unlock (&(rwl->mtxExclusiveAccess));
- return result;
- }
-
- if (rwl->nExclusiveAccessCount > 0
- || rwl->nSharedAccessCount > rwl->nCompletedSharedAccessCount)
- {
- result = pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted));
- result1 = pthread_mutex_unlock (&(rwl->mtxExclusiveAccess));
- result2 = EBUSY;
- }
- else
- {
- rwl->nMagic = 0;
- if ((result =
- pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted))) != 0)
- {
- pthread_mutex_unlock (&rwl->mtxExclusiveAccess);
- return result;
- }
- if ((result =
- pthread_mutex_unlock (&(rwl->mtxExclusiveAccess))) != 0)
- {
- return result;
- }
- *rwlock = NULL;
- result = pthread_cond_destroy (&(rwl->cndSharedAccessCompleted));
- result1 = pthread_mutex_destroy (&(rwl->mtxSharedAccessCompleted));
- result2 = pthread_mutex_destroy (&(rwl->mtxExclusiveAccess));
- (void) free (rwl);
- }
- }
- else
- {
-
- pte_osMutexLock (pte_rwlock_test_init_lock);
-
- if (*rwlock == PTHREAD_RWLOCK_INITIALIZER)
- {
-
- *rwlock = NULL;
- }
- else
- {
-
- result = EBUSY;
- }
- pte_osMutexUnlock(pte_rwlock_test_init_lock);
- }
- return ((result != 0) ? result : ((result1 != 0) ? result1 : result2));
- }
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