/* Wait
* waits for a thread to exit
*
* "status" [ OUT ] - return parameter for thread's exit code
*/
LIB_EXPORT rc_t CC KThreadWait ( KThread *self, rc_t *out )
{
DWORD wait_res;
if ( self == NULL )
return RC ( rcPS, rcThread, rcWaiting, rcSelf, rcNull );
/* prevent multiple waiters */
if ( atomic32_test_and_set ( & self -> waiting, 0, 1 ) != 0 )
return RC ( rcPS, rcThread, rcWaiting, rcThread, rcBusy );
wait_res = WaitForSingleObject( self->thread_handle, INFINITE );
/* release waiter lock */
atomic32_set ( & self -> waiting, 0 );
switch( wait_res )
{
case WAIT_FAILED :
return RC ( rcPS, rcThread, rcWaiting, rcNoObj, rcUnknown );
}
/*
switch ( status )
{
case 0:
break;
case ESRCH:
return RC ( rcPS, rcThread, rcWaiting, rcThread, rcDestroyed );
case EINVAL:
return RC ( rcPS, rcThread, rcWaiting, rcThread, rcDetached );
case EDEADLK:
return RC ( rcPS, rcThread, rcWaiting, rcThread, rcDeadlock );
default:
return RC ( rcPS, rcThread, rcWaiting, rcNoObj, rcUnknown );
}
*/
self -> join = false;
/*
if ( td == PTHREAD_CANCELED )
self -> rc = RC ( rcPS, rcThread, rcWaiting, rcThread, rcCanceled );
*/
if ( out != NULL )
* out = self -> rc;
return 0;
}
/* 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;
}
