/* Seal
* indicate that the queue has been closed off
* meaning there will be no further push operations
* if "writes" is true, and no further pop operations
* otherwise.
*/
LIB_EXPORT rc_t CC KQueueSeal ( KQueue *self )
{
rc_t rc = 0;
QMSG ( "%s[%p] called\n", __func__, self );
if ( self == NULL )
return RC ( rcCont, rcQueue, rcFreezing, rcSelf, rcNull );
if ( atomic32_test_and_set ( & self -> sealed, 1, 0 ) == 0 )
{
#if 1
QMSG ( "%s[%p]: acquiring write lock ( %p )\n", __func__, self, self -> wl );
rc = KLockAcquire ( self -> wl );
if ( rc == 0 )
{
QMSG ( "%s[%p]: canceling write semaphore...\n", __func__, self );
rc = KSemaphoreCancel ( self -> wc );
QMSG ( "%s[%p]: ...done, rc = %R.\n", __func__, self, rc );
KLockUnlock ( self -> wl );
if ( rc == 0 )
{
QMSG ( "%s[%p]: acquiring read lock ( %p )\n", __func__, self, self -> rl );
rc = KLockAcquire ( self -> rl );
if ( rc == 0 )
{
QMSG ( "%s[%p]: canceling read semaphore...\n", __func__, self );
rc = KSemaphoreCancel ( self -> rc );
QMSG ( "%s[%p]: ...done, rc = %R.\n", __func__, self, rc );
KLockUnlock ( self -> rl );
}
}
}
#endif
}
return rc;
}
/* Seal
* indicate that the queue has been closed off
* meaning there will be no further push operations
* if "writes" is true, and no further pop operations
* otherwise.
*/
LIB_EXPORT rc_t CC KQueueSeal ( KQueue *self )
{
rc_t rc = 0;
QMSG ( "%s called\n", __func__ );
if ( self == NULL )
return RC ( rcCont, rcQueue, rcFreezing, rcSelf, rcNull );
self -> sealed = true;
#if 0
QMSG ( "%s: acquiring write lock ( %p )\n", __func__, self -> wl );
rc = KLockAcquire ( self -> wl );
if ( rc == 0 )
{
QMSG ( "%s: canceling write semaphore...\n", __func__ );
rc = KSemaphoreCancel ( self -> wc );
QMSG ( "%s: ...done, rc = %R.\n", __func__, rc );
KLockUnlock ( self -> wl );
if ( rc == 0 )
{
QMSG ( "%s: acquiring read lock ( %p )\n", __func__, self -> rl );
rc = KLockAcquire ( self -> rl );
if ( rc == 0 )
{
QMSG ( "%s: canceling read semaphore...\n", __func__ );
rc = KSemaphoreCancel ( self -> rc );
QMSG ( "%s: ...done, rc = %R.\n", __func__, rc );
KLockUnlock ( self -> rl );
}
}
}
#endif
return rc;
}
