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Diffstat (limited to 'pthread_rwlock_destroy.c')
-rw-r--r--pthread_rwlock_destroy.c169
1 files changed, 86 insertions, 83 deletions
diff --git a/pthread_rwlock_destroy.c b/pthread_rwlock_destroy.c
index f759ed0..63d0cfd 100644
--- a/pthread_rwlock_destroy.c
+++ b/pthread_rwlock_destroy.c
@@ -41,100 +41,103 @@
#include "implement.h"
int
-pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
+pthread_rwlock_destroy (pthread_rwlock_t * rwlock)
{
- pthread_rwlock_t rwl;
- int result = 0, result1 = 0, result2 = 0;
+ pthread_rwlock_t rwl;
+ int result = 0, result1 = 0, result2 = 0;
- if (rwlock == NULL || *rwlock == NULL)
- {
- return EINVAL;
- }
+ if (rwlock == NULL || *rwlock == NULL)
+ {
+ return EINVAL;
+ }
- if (*rwlock != PTHREAD_RWLOCK_INITIALIZER)
- {
- rwl = *rwlock;
+ if (*rwlock != PTHREAD_RWLOCK_INITIALIZER)
+ {
+ rwl = *rwlock;
- if (rwl->nMagic != PTW32_RWLOCK_MAGIC)
- {
- return EINVAL;
- }
+ if (rwl->nMagic != PTW32_RWLOCK_MAGIC)
+ {
+ return EINVAL;
+ }
- if ((result = pthread_mutex_lock(&(rwl->mtxExclusiveAccess))) != 0)
- {
- return result;
- }
+ 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 ((result =
+ pthread_mutex_lock (&(rwl->mtxSharedAccessCompleted))) != 0)
+ {
+ (void) pthread_mutex_unlock (&(rwl->mtxExclusiveAccess));
+ return result;
+ }
- /*
- * Check whether any threads own/wait for the lock (wait for ex.access);
- * report "BUSY" if so.
- */
- 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;
+ /*
+ * Check whether any threads own/wait for the lock (wait for ex.access);
+ * report "BUSY" if so.
+ */
+ 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->mtxSharedAccessCompleted))) != 0)
+ {
+ pthread_mutex_unlock (&rwl->mtxExclusiveAccess);
+ return result;
+ }
- if ((result = pthread_mutex_unlock(&(rwl->mtxExclusiveAccess))) != 0)
- {
- return result;
- }
+ if ((result =
+ pthread_mutex_unlock (&(rwl->mtxExclusiveAccess))) != 0)
+ {
+ return result;
+ }
- *rwlock = NULL; /* Invalidate rwlock before anything else */
- result = pthread_cond_destroy(&(rwl->cndSharedAccessCompleted));
- result1 = pthread_mutex_destroy(&(rwl->mtxSharedAccessCompleted));
- result2 = pthread_mutex_destroy(&(rwl->mtxExclusiveAccess));
- (void) free(rwl);
- }
- }
- else
- {
- /*
- * See notes in ptw32_rwlock_check_need_init() above also.
- */
- EnterCriticalSection(&ptw32_rwlock_test_init_lock);
+ *rwlock = NULL; /* Invalidate rwlock before anything else */
+ result = pthread_cond_destroy (&(rwl->cndSharedAccessCompleted));
+ result1 = pthread_mutex_destroy (&(rwl->mtxSharedAccessCompleted));
+ result2 = pthread_mutex_destroy (&(rwl->mtxExclusiveAccess));
+ (void) free (rwl);
+ }
+ }
+ else
+ {
+ /*
+ * See notes in ptw32_rwlock_check_need_init() above also.
+ */
+ EnterCriticalSection (&ptw32_rwlock_test_init_lock);
- /*
- * Check again.
- */
- if (*rwlock == PTHREAD_RWLOCK_INITIALIZER)
- {
- /*
- * This is all we need to do to destroy a statically
- * initialised rwlock that has not yet been used (initialised).
- * If we get to here, another thread
- * waiting to initialise this rwlock will get an EINVAL.
- */
- *rwlock = NULL;
- }
- else
- {
- /*
- * The rwlock has been initialised while we were waiting
- * so assume it's in use.
- */
- result = EBUSY;
- }
+ /*
+ * Check again.
+ */
+ if (*rwlock == PTHREAD_RWLOCK_INITIALIZER)
+ {
+ /*
+ * This is all we need to do to destroy a statically
+ * initialised rwlock that has not yet been used (initialised).
+ * If we get to here, another thread
+ * waiting to initialise this rwlock will get an EINVAL.
+ */
+ *rwlock = NULL;
+ }
+ else
+ {
+ /*
+ * The rwlock has been initialised while we were waiting
+ * so assume it's in use.
+ */
+ result = EBUSY;
+ }
- LeaveCriticalSection(&ptw32_rwlock_test_init_lock);
- }
+ LeaveCriticalSection (&ptw32_rwlock_test_init_lock);
+ }
- return ((result != 0) ? result : ((result1 != 0) ? result1 : result2));
+ return ((result != 0) ? result : ((result1 != 0) ? result1 : result2));
}