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Fixed occasional loss of SendMessage() return value.

This commit is contained in:
Alex Korobka 1999-03-28 09:19:31 +00:00 committed by Alexandre Julliard
parent 2e23da4ad5
commit 073e3bc9e5
1 changed files with 21 additions and 14 deletions
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35
windows/message.c
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@ -673,8 +673,10 @@ static LRESULT MSG_SendMessageInterThread( HQUEUE16 hDestQueue,
if ( THREAD_IsWin16(THREAD_Current()) && THREAD_IsWin16(destQ->thdb) ) if ( THREAD_IsWin16(THREAD_Current()) && THREAD_IsWin16(destQ->thdb) )
DirectedYield16( destQ->thdb->teb.htask16 ); DirectedYield16( destQ->thdb->teb.htask16 );
/* wait for the result */ /* wait for the result, note that 16-bit apps almost always get out of
while ( !(smsg->flags & SMSG_HAVE_RESULT) ) * DirectedYield() with SMSG_HAVE_RESULT flag already set */
while ( TRUE )
{ {
/* /*
* The sequence is crucial to avoid deadlock situations: * The sequence is crucial to avoid deadlock situations:
@ -686,21 +688,26 @@ static LRESULT MSG_SendMessageInterThread( HQUEUE16 hDestQueue,
* we are guaranteed that -should we now clear the QS_SMRESULT that * we are guaranteed that -should we now clear the QS_SMRESULT that
* was signalled already by the receiver- we will not start waiting. * was signalled already by the receiver- we will not start waiting.
*/ */
QUEUE_ClearWakeBit( queue, QS_SMRESULT );
if ( !(smsg->flags & SMSG_HAVE_RESULT)
&& QUEUE_WaitBits( QS_SMRESULT, timeout ) == 0 )
{
/* return with timeout */
SetLastError( 0 );
retVal = 0;
break;
}
if ( smsg->flags & SMSG_HAVE_RESULT ) if ( smsg->flags & SMSG_HAVE_RESULT )
{ {
*pRes = smsg->lResult; got:
TRACE(sendmsg,"smResult = %08x\n", (unsigned)*pRes ); *pRes = smsg->lResult;
TRACE(sendmsg,"smResult = %08x\n", (unsigned)*pRes );
break;
}
QUEUE_ClearWakeBit( queue, QS_SMRESULT );
if ( smsg->flags & SMSG_HAVE_RESULT )
goto got;
if( QUEUE_WaitBits( QS_SMRESULT, timeout ) == 0 )
{
/* return with timeout */
SetLastError( 0 );
retVal = 0;
break;
} }
} }