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Sweden-Number/windows/queue.c

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/* * Message queues related functions
*
* Copyright 1993, 1994 Alexandre Julliard
*/
#include <stdlib.h>
#include <signal.h>
#include "miscemu.h"
#include "module.h"
#include "queue.h"
#include "task.h"
#include "win.h"
#include "clipboard.h"
#include "hook.h"
#include "heap.h"
#include "thread.h"
#include "process.h"
#include <assert.h>
#include "debug.h"
#define MAX_QUEUE_SIZE 120 /* Max. size of a message queue */
static HQUEUE16 hFirstQueue = 0;
static HQUEUE16 hExitingQueue = 0;
static HQUEUE16 hmemSysMsgQueue = 0;
static MESSAGEQUEUE *sysMsgQueue = NULL;
static PERQUEUEDATA *pQDataWin16 = NULL; /* Global perQData for Win16 tasks */
static MESSAGEQUEUE *pMouseQueue = NULL; /* Queue for last mouse message */
static MESSAGEQUEUE *pKbdQueue = NULL; /* Queue for last kbd message */
HQUEUE16 hCursorQueue = 0;
HQUEUE16 hActiveQueue = 0;
/***********************************************************************
* PERQDATA_CreateInstance
*
* Creates an instance of a reference counted PERQUEUEDATA element
* for the message queue. perQData is stored globally for 16 bit tasks.
*
* Note: We don't implement perQdata exactly the same way Windows does.
* Each perQData element is reference counted since it may be potentially
* shared by multiple message Queues (via AttachThreadInput).
* We only store the current values for Active, Capture and focus windows
* currently.
*/
PERQUEUEDATA * PERQDATA_CreateInstance( )
{
PERQUEUEDATA *pQData;
BOOL16 bIsWin16 = 0;
TRACE(msg,"()\n");
/* Share a single instance of perQData for all 16 bit tasks */
if ( ( bIsWin16 = THREAD_IsWin16( THREAD_Current() ) ) )
{
/* If previously allocated, just bump up ref count */
if ( pQDataWin16 )
{
PERQDATA_Addref( pQDataWin16 );
return pQDataWin16;
}
}
/* Allocate PERQUEUEDATA from the system heap */
if (!( pQData = (PERQUEUEDATA *) HeapAlloc( SystemHeap, 0,
sizeof(PERQUEUEDATA) ) ))
return 0;
/* Initialize */
pQData->hWndCapture = pQData->hWndFocus = pQData->hWndActive = 0;
pQData->ulRefCount = 1;
pQData->nCaptureHT = HTCLIENT;
/* Note: We have an independent critical section for the per queue data
* since this may be shared by different threads. see AttachThreadInput()
*/
InitializeCriticalSection( &pQData->cSection );
/* Save perQData globally for 16 bit tasks */
if ( bIsWin16 )
pQDataWin16 = pQData;
return pQData;
}
/***********************************************************************
* PERQDATA_Addref
*
* Increment reference count for the PERQUEUEDATA instance
* Returns reference count for debugging purposes
*/
ULONG PERQDATA_Addref( PERQUEUEDATA *pQData )
{
assert(pQData != 0 );
TRACE(msg,"(): current refcount %lu ...\n", pQData->ulRefCount);
EnterCriticalSection( &pQData->cSection );
++pQData->ulRefCount;
LeaveCriticalSection( &pQData->cSection );
return pQData->ulRefCount;
}
/***********************************************************************
* PERQDATA_Release
*
* Release a reference to a PERQUEUEDATA instance.
* Destroy the instance if no more references exist
* Returns reference count for debugging purposes
*/
ULONG PERQDATA_Release( PERQUEUEDATA *pQData )
{
assert(pQData != 0 );
TRACE(msg,"(): current refcount %lu ...\n",
(LONG)pQData->ulRefCount );
EnterCriticalSection( &pQData->cSection );
if ( --pQData->ulRefCount == 0 )
{
LeaveCriticalSection( &pQData->cSection );
DeleteCriticalSection( &pQData->cSection );
TRACE(msg,"(): deleting PERQUEUEDATA instance ...\n" );
/* Deleting our global 16 bit perQData? */
if ( pQData == pQDataWin16 )
pQDataWin16 = 0;
/* Free the PERQUEUEDATA instance */
HeapFree( SystemHeap, 0, pQData );
return 0;
}
LeaveCriticalSection( &pQData->cSection );
return pQData->ulRefCount;
}
/***********************************************************************
* PERQDATA_GetFocusWnd
*
* Get the focus hwnd member in a threadsafe manner
*/
HWND32 PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData )
{
HWND32 hWndFocus;
assert(pQData != 0 );
EnterCriticalSection( &pQData->cSection );
hWndFocus = pQData->hWndFocus;
LeaveCriticalSection( &pQData->cSection );
return hWndFocus;
}
/***********************************************************************
* PERQDATA_SetFocusWnd
*
* Set the focus hwnd member in a threadsafe manner
*/
HWND32 PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND32 hWndFocus )
{
HWND32 hWndFocusPrv;
assert(pQData != 0 );
EnterCriticalSection( &pQData->cSection );
hWndFocusPrv = pQData->hWndFocus;
pQData->hWndFocus = hWndFocus;
LeaveCriticalSection( &pQData->cSection );
return hWndFocusPrv;
}
/***********************************************************************
* PERQDATA_GetActiveWnd
*
* Get the active hwnd member in a threadsafe manner
*/
HWND32 PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData )
{
HWND32 hWndActive;
assert(pQData != 0 );
EnterCriticalSection( &pQData->cSection );
hWndActive = pQData->hWndActive;
LeaveCriticalSection( &pQData->cSection );
return hWndActive;
}
/***********************************************************************
* PERQDATA_SetActiveWnd
*
* Set the active focus hwnd member in a threadsafe manner
*/
HWND32 PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND32 hWndActive )
{
HWND32 hWndActivePrv;
assert(pQData != 0 );
EnterCriticalSection( &pQData->cSection );
hWndActivePrv = pQData->hWndActive;
pQData->hWndActive = hWndActive;
LeaveCriticalSection( &pQData->cSection );
return hWndActivePrv;
}
/***********************************************************************
* PERQDATA_GetCaptureWnd
*
* Get the capture hwnd member in a threadsafe manner
*/
HWND32 PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData )
{
HWND32 hWndCapture;
assert(pQData != 0 );
EnterCriticalSection( &pQData->cSection );
hWndCapture = pQData->hWndCapture;
LeaveCriticalSection( &pQData->cSection );
return hWndCapture;
}
/***********************************************************************
* PERQDATA_SetCaptureWnd
*
* Set the capture hwnd member in a threadsafe manner
*/
HWND32 PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND32 hWndCapture )
{
HWND32 hWndCapturePrv;
assert(pQData != 0 );
EnterCriticalSection( &pQData->cSection );
hWndCapturePrv = pQData->hWndCapture;
pQData->hWndCapture = hWndCapture;
LeaveCriticalSection( &pQData->cSection );
return hWndCapturePrv;
}
/***********************************************************************
* PERQDATA_GetCaptureInfo
*
* Get the capture info member in a threadsafe manner
*/
INT16 PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData )
{
INT16 nCaptureHT;
assert(pQData != 0 );
EnterCriticalSection( &pQData->cSection );
nCaptureHT = pQData->nCaptureHT;
LeaveCriticalSection( &pQData->cSection );
return nCaptureHT;
}
/***********************************************************************
* PERQDATA_SetCaptureInfo
*
* Set the capture info member in a threadsafe manner
*/
INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT )
{
INT16 nCaptureHTPrv;
assert(pQData != 0 );
EnterCriticalSection( &pQData->cSection );
nCaptureHTPrv = pQData->nCaptureHT;
pQData->nCaptureHT = nCaptureHT;
LeaveCriticalSection( &pQData->cSection );
return nCaptureHTPrv;
}
/***********************************************************************
* QUEUE_Lock
*
* Function for getting a 32 bit pointer on queue strcture. For thread
* safeness programmers should use this function instead of GlobalLock to
* retrieve a pointer on the structure. QUEUE_Unlock should also be called
* when access to the queue structure is not required anymore.
*/
MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
{
MESSAGEQUEUE *queue;
SYSTEM_LOCK();
queue = GlobalLock16( hQueue );
if ( !queue || (queue->magic != QUEUE_MAGIC) )
{
SYSTEM_UNLOCK();
return NULL;
}
queue->lockCount++;
SYSTEM_UNLOCK();
return queue;
}
/***********************************************************************
* QUEUE_Unlock
*
* Use with QUEUE_Lock to get a thread safe acces to message queue
* structure
*/
void QUEUE_Unlock( MESSAGEQUEUE *queue )
{
if (queue)
{
SYSTEM_LOCK();
if ( --queue->lockCount == 0 )
{
DeleteCriticalSection ( &queue->cSection );
if (queue->hEvent)
CloseHandle( queue->hEvent );
GlobalFree16( queue->self );
}
SYSTEM_UNLOCK();
}
}
/***********************************************************************
* QUEUE_DumpQueue
*/
void QUEUE_DumpQueue( HQUEUE16 hQueue )
{
MESSAGEQUEUE *pq;
if (!(pq = (MESSAGEQUEUE*) QUEUE_Lock( hQueue )) )
{
WARN(msg, "%04x is not a queue handle\n", hQueue );
return;
}
DUMP( "next: %12.4x Intertask SendMessage:\n"
"thread: %10p ----------------------\n"
"hWnd: %12.8x\n"
"firstMsg: %8p msg: %11.8x\n"
"lastMsg: %8p wParam: %10.8x\n"
"msgCount: %8.4x lParam: %10.8x\n"
"lockCount: %7.4x lRet: %12.8x\n"
"wWinVer: %9.4x ISMH: %10.4x\n"
"paints: %10.4x hSendTask: %5.4x\n"
"timers: %10.4x hPrevSend: %5.4x\n"
"wakeBits: %8.4x\n"
"wakeMask: %8.4x\n"
"hCurHook: %8.4x\n",
pq->next, pq->thdb, pq->hWnd32, pq->firstMsg, pq->msg32,
pq->lastMsg, pq->wParam32, pq->msgCount, (unsigned)pq->lParam,
(unsigned)pq->lockCount, (unsigned)pq->SendMessageReturn,
pq->wWinVersion, pq->InSendMessageHandle,
pq->wPaintCount, pq->hSendingTask, pq->wTimerCount,
pq->hPrevSendingTask, pq->wakeBits, pq->wakeMask, pq->hCurHook);
QUEUE_Unlock( pq );
}
/***********************************************************************
* QUEUE_WalkQueues
*/
void QUEUE_WalkQueues(void)
{
char module[10];
HQUEUE16 hQueue = hFirstQueue;
DUMP( "Queue Msgs Thread Task Module\n" );
while (hQueue)
{
MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
if (!queue)
{
WARN( msg, "Bad queue handle %04x\n", hQueue );
return;
}
if (!GetModuleName( queue->thdb->process->task, module, sizeof(module )))
strcpy( module, "???" );
DUMP( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
queue->thdb, queue->thdb->process->task, module );
hQueue = queue->next;
QUEUE_Unlock( queue );
}
DUMP( "\n" );
}
/***********************************************************************
* QUEUE_IsExitingQueue
*/
BOOL32 QUEUE_IsExitingQueue( HQUEUE16 hQueue )
{
return (hExitingQueue && (hQueue == hExitingQueue));
}
/***********************************************************************
* QUEUE_SetExitingQueue
*/
void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
{
hExitingQueue = hQueue;
}
/***********************************************************************
* QUEUE_CreateMsgQueue
*
* Creates a message queue. Doesn't link it into queue list!
*/
static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
{
HQUEUE16 hQueue;
MESSAGEQUEUE * msgQueue;
TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
TRACE(msg,"(): Creating message queue...\n");
if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
sizeof(MESSAGEQUEUE) )))
return 0;
msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
if ( !msgQueue )
return 0;
msgQueue->self = hQueue;
msgQueue->wakeBits = msgQueue->changeBits = QS_SMPARAMSFREE;
msgQueue->wWinVersion = pTask ? pTask->version : 0;
InitializeCriticalSection( &msgQueue->cSection );
MakeCriticalSectionGlobal( &msgQueue->cSection );
/* Create an Event object for waiting on message, used by win32 thread
only */
if ( !THREAD_IsWin16( THREAD_Current() ) )
{
msgQueue->hEvent = CreateEvent32A( NULL, FALSE, FALSE, NULL);
if (msgQueue->hEvent == 0)
{
WARN(msg, "CreateEvent32A is not able to create an event object");
return 0;
}
msgQueue->hEvent = ConvertToGlobalHandle( msgQueue->hEvent );
}
else
msgQueue->hEvent = 0;
msgQueue->lockCount = 1;
msgQueue->magic = QUEUE_MAGIC;
/* Create and initialize our per queue data */
msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
return hQueue;
}
/***********************************************************************
* QUEUE_DeleteMsgQueue
*
* Unlinks and deletes a message queue.
*
* Note: We need to mask asynchronous events to make sure PostMessage works
* even in the signal handler.
*/
BOOL32 QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
{
MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
HQUEUE16 senderQ;
HQUEUE16 *pPrev;
TRACE(msg,"(): Deleting message queue %04x\n", hQueue);
if (!hQueue || !msgQueue)
{
WARN(msg, "invalid argument.\n");
return 0;
}
msgQueue->magic = 0;
if( hCursorQueue == hQueue ) hCursorQueue = 0;
if( hActiveQueue == hQueue ) hActiveQueue = 0;
/* flush sent messages */
senderQ = msgQueue->hSendingTask;
while( senderQ )
{
MESSAGEQUEUE* sq = (MESSAGEQUEUE*)QUEUE_Lock(senderQ);
if( !sq ) break;
sq->SendMessageReturn = 0L;
QUEUE_SetWakeBit( sq, QS_SMRESULT );
senderQ = sq->hPrevSendingTask;
QUEUE_Unlock(sq);
}
SYSTEM_LOCK();
/* Release per queue data if present */
if ( msgQueue->pQData )
{
PERQDATA_Release( msgQueue->pQData );
msgQueue->pQData = 0;
}
/* remove the message queue from the global link list */
pPrev = &hFirstQueue;
while (*pPrev && (*pPrev != hQueue))
{
MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
/* sanity check */
if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
{
/* HQUEUE link list is corrupted, try to exit gracefully */
WARN( msg, "HQUEUE link list corrupted!\n");
pPrev = 0;
break;
}
pPrev = &msgQ->next;
}
if (pPrev && *pPrev) *pPrev = msgQueue->next;
msgQueue->self = 0;
SYSTEM_UNLOCK();
/* free up resource used by MESSAGEQUEUE strcture */
msgQueue->lockCount--;
QUEUE_Unlock( msgQueue );
return 1;
}
/***********************************************************************
* QUEUE_CreateSysMsgQueue
*
* Create the system message queue, and set the double-click speed.
* Must be called only once.
*/
BOOL32 QUEUE_CreateSysMsgQueue( int size )
{
/* Note: We dont need perQ data for the system message queue */
if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
return FALSE;
sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
return TRUE;
}
/***********************************************************************
* QUEUE_GetSysQueue
*/
MESSAGEQUEUE *QUEUE_GetSysQueue(void)
{
return sysMsgQueue;
}
/***********************************************************************
* QUEUE_Wait
*/
static void QUEUE_Wait( DWORD wait_mask )
{
if ( THREAD_IsWin16( THREAD_Current() ) )
WaitEvent( 0 );
else
{
TRACE(msg, "current task is 32-bit, calling SYNC_DoWait\n");
MsgWaitForMultipleObjects( 0, NULL, FALSE, INFINITE32, wait_mask );
}
}
/***********************************************************************
* QUEUE_SetWakeBit
*
* See "Windows Internals", p.449
*/
void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
{
TRACE(msg,"queue = %04x (wm=%04x), bit = %04x\n",
queue->self, queue->wakeMask, bit );
if (bit & QS_MOUSE) pMouseQueue = queue;
if (bit & QS_KEY) pKbdQueue = queue;
queue->changeBits |= bit;
queue->wakeBits |= bit;
if (queue->wakeMask & bit)
{
queue->wakeMask = 0;
/* Wake up thread waiting for message */
if ( THREAD_IsWin16( queue->thdb ) )
PostEvent( queue->thdb->process->task );
else
{
SetEvent( queue->hEvent );
}
}
}
/***********************************************************************
* QUEUE_ClearWakeBit
*/
void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
{
queue->changeBits &= ~bit;
queue->wakeBits &= ~bit;
}
/***********************************************************************
* QUEUE_WaitBits
*
* See "Windows Internals", p.447
*/
void QUEUE_WaitBits( WORD bits )
{
MESSAGEQUEUE *queue;
TRACE(msg,"q %04x waiting for %04x\n", GetFastQueue(), bits);
for (;;)
{
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return;
if (queue->changeBits & bits)
{
/* One of the bits is set; we can return */
queue->wakeMask = 0;
QUEUE_Unlock( queue );
return;
}
if (queue->wakeBits & QS_SENDMESSAGE)
{
/* Process the sent message immediately */
queue->wakeMask = 0;
QUEUE_ReceiveMessage( queue );
QUEUE_Unlock( queue );
continue; /* nested sm crux */
}
queue->wakeMask = bits | QS_SENDMESSAGE;
if(queue->changeBits & bits)
{
QUEUE_Unlock( queue );
continue;
}
TRACE(msg,"%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
QUEUE_Wait( queue->wakeMask );
QUEUE_Unlock( queue );
}
}
/***********************************************************************
* QUEUE_ReceiveMessage
*
* This routine is called when a sent message is waiting for the queue.
*/
void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
{
MESSAGEQUEUE *senderQ = NULL;
HQUEUE16 prevSender = 0;
QSMCTRL* prevCtrlPtr = NULL;
LRESULT result = 0;
TRACE(msg, "ReceiveMessage, queue %04x\n", queue->self );
if (!(queue->wakeBits & QS_SENDMESSAGE) ||
!(senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask)))
{ TRACE(msg,"\trcm: nothing to do\n"); return; }
if( !senderQ->hPrevSendingTask )
QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE ); /* no more sent messages */
/* Save current state on stack */
prevSender = queue->InSendMessageHandle;
prevCtrlPtr = queue->smResultCurrent;
/* Remove sending queue from the list */
queue->InSendMessageHandle = queue->hSendingTask;
queue->smResultCurrent = senderQ->smResultInit;
queue->hSendingTask = senderQ->hPrevSendingTask;
TRACE(msg, "\trcm: smResultCurrent = %08x, prevCtrl = %08x\n",
(unsigned)queue->smResultCurrent, (unsigned)prevCtrlPtr );
QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
TRACE(msg, "\trcm: calling wndproc - %08x %08x %08x %08x\n",
senderQ->hWnd32, senderQ->msg32,
senderQ->wParam32, (unsigned)senderQ->lParam );
if (IsWindow32( senderQ->hWnd32 ))
{
WND *wndPtr = WIN_FindWndPtr( senderQ->hWnd32 );
DWORD extraInfo = queue->GetMessageExtraInfoVal;
queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
if (senderQ->flags & QUEUE_SM_WIN32)
{
TRACE(msg, "\trcm: msg is Win32\n" );
if (senderQ->flags & QUEUE_SM_UNICODE)
result = CallWindowProc32W( wndPtr->winproc,
senderQ->hWnd32, senderQ->msg32,
senderQ->wParam32, senderQ->lParam );
else
result = CallWindowProc32A( wndPtr->winproc,
senderQ->hWnd32, senderQ->msg32,
senderQ->wParam32, senderQ->lParam );
}
else /* Win16 message */
result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
(HWND16) senderQ->hWnd32,
(UINT16) senderQ->msg32,
LOWORD (senderQ->wParam32),
senderQ->lParam );
queue->GetMessageExtraInfoVal = extraInfo; /* Restore extra info */
TRACE(msg,"\trcm: result = %08x\n", (unsigned)result );
}
else WARN(msg, "\trcm: bad hWnd\n");
QUEUE_Unlock( senderQ );
/* Return the result to the sender task */
ReplyMessage16( result );
queue->InSendMessageHandle = prevSender;
queue->smResultCurrent = prevCtrlPtr;
TRACE(msg,"done!\n");
}
/***********************************************************************
* QUEUE_FlushMessage
*
* Try to reply to all pending sent messages on exit.
*/
void QUEUE_FlushMessages( HQUEUE16 hQueue )
{
MESSAGEQUEUE *queue = (MESSAGEQUEUE*)QUEUE_Lock( hQueue );
if( queue )
{
MESSAGEQUEUE *senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask );
QSMCTRL* CtrlPtr = queue->smResultCurrent;
TRACE(msg,"Flushing queue %04x:\n", hQueue );
while( senderQ )
{
if( !CtrlPtr )
CtrlPtr = senderQ->smResultInit;
TRACE(msg,"\tfrom queue %04x, smResult %08x\n", queue->hSendingTask, (unsigned)CtrlPtr );
if( !(queue->hSendingTask = senderQ->hPrevSendingTask) )
QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
queue->smResultCurrent = CtrlPtr;
while( senderQ->wakeBits & QS_SMRESULT ) OldYield();
senderQ->SendMessageReturn = 0;
senderQ->smResult = queue->smResultCurrent;
QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
QUEUE_Unlock( senderQ );
senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask );
CtrlPtr = NULL;
}
queue->InSendMessageHandle = 0;
QUEUE_Unlock( queue );
}
}
/***********************************************************************
* QUEUE_AddMsg
*
* Add a message to the queue. Return FALSE if queue is full.
*/
BOOL32 QUEUE_AddMsg( HQUEUE16 hQueue, MSG32 *msg, DWORD extraInfo )
{
MESSAGEQUEUE *msgQueue;
QMSG *qmsg;
if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
/* allocate new message in global heap for now */
if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
{
QUEUE_Unlock( msgQueue );
return 0;
}
EnterCriticalSection( &msgQueue->cSection );
/* Store message */
qmsg->msg = *msg;
qmsg->extraInfo = extraInfo;
/* insert the message in the link list */
qmsg->nextMsg = 0;
qmsg->prevMsg = msgQueue->lastMsg;
if (msgQueue->lastMsg)
msgQueue->lastMsg->nextMsg = qmsg;
/* update first and last anchor in message queue */
msgQueue->lastMsg = qmsg;
if (!msgQueue->firstMsg)
msgQueue->firstMsg = qmsg;
msgQueue->msgCount++;
LeaveCriticalSection( &msgQueue->cSection );
QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
QUEUE_Unlock( msgQueue );
return TRUE;
}
/***********************************************************************
* QUEUE_FindMsg
*
* Find a message matching the given parameters. Return -1 if none available.
*/
QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND32 hwnd, int first, int last )
{
QMSG* qmsg;
EnterCriticalSection( &msgQueue->cSection );
if (!msgQueue->msgCount)
qmsg = 0;
else if (!hwnd && !first && !last)
qmsg = msgQueue->firstMsg;
else
{
/* look in linked list for message matching first and last criteria */
for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
{
MSG32 *msg = &(qmsg->msg);
if (!hwnd || (msg->hwnd == hwnd))
{
if (!first && !last)
break; /* found it */
if ((msg->message >= first) && (msg->message <= last))
break; /* found it */
}
}
}
LeaveCriticalSection( &msgQueue->cSection );
return qmsg;
}
/***********************************************************************
* QUEUE_RemoveMsg
*
* Remove a message from the queue (pos must be a valid position).
*/
void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
{
EnterCriticalSection( &msgQueue->cSection );
/* set the linked list */
if (qmsg->prevMsg)
qmsg->prevMsg->nextMsg = qmsg->nextMsg;
if (qmsg->nextMsg)
qmsg->nextMsg->prevMsg = qmsg->prevMsg;
if (msgQueue->firstMsg == qmsg)
msgQueue->firstMsg = qmsg->nextMsg;
if (msgQueue->lastMsg == qmsg)
msgQueue->lastMsg = qmsg->prevMsg;
/* deallocate the memory for the message */
HeapFree( SystemHeap, 0, qmsg );
msgQueue->msgCount--;
if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
LeaveCriticalSection( &msgQueue->cSection );
}
/***********************************************************************
* QUEUE_WakeSomeone
*
* Wake a queue upon reception of a hardware event.
*/
static void QUEUE_WakeSomeone( UINT32 message )
{
WND* wndPtr = NULL;
WORD wakeBit;
HWND32 hwnd;
HQUEUE16 hQueue = 0;
MESSAGEQUEUE *queue = NULL;
if (hCursorQueue)
hQueue = hCursorQueue;
if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
{
wakeBit = QS_KEY;
if( hActiveQueue )
hQueue = hActiveQueue;
}
else
{
wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
if( (hwnd = GetCapture32()) )
if( (wndPtr = WIN_FindWndPtr( hwnd )) )
{
hQueue = wndPtr->hmemTaskQ;
}
}
if( (hwnd = GetSysModalWindow16()) )
{
if( (wndPtr = WIN_FindWndPtr( hwnd )) )
hQueue = wndPtr->hmemTaskQ;
}
if (hQueue)
queue = QUEUE_Lock( hQueue );
if( !queue )
{
queue = QUEUE_Lock( hFirstQueue );
while( queue )
{
if (queue->wakeMask & wakeBit) break;
QUEUE_Unlock(queue);
queue = QUEUE_Lock( queue->next );
}
if( !queue )
{
WARN(msg, "couldn't find queue\n");
return;
}
}
QUEUE_SetWakeBit( queue, wakeBit );
QUEUE_Unlock( queue );
}
/***********************************************************************
* hardware_event
*
* Add an event to the system message queue.
* Note: the position is relative to the desktop window.
*/
void hardware_event( WORD message, WORD wParam, LONG lParam,
int xPos, int yPos, DWORD time, DWORD extraInfo )
{
MSG32 *msg;
QMSG *qmsg = sysMsgQueue->lastMsg;
int mergeMsg = 0;
if (!sysMsgQueue) return;
/* Merge with previous event if possible */
if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
{
msg = &(sysMsgQueue->lastMsg->msg);
if ((msg->message == message) && (msg->wParam == wParam))
{
/* Merge events */
qmsg = sysMsgQueue->lastMsg;
mergeMsg = 1;
}
}
if (!mergeMsg)
{
/* Should I limit the number of message in
the system message queue??? */
/* Don't merge allocate a new msg in the global heap */
if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
return;
/* put message at the end of the linked list */
qmsg->nextMsg = 0;
qmsg->prevMsg = sysMsgQueue->lastMsg;
if (sysMsgQueue->lastMsg)
sysMsgQueue->lastMsg->nextMsg = qmsg;
/* set last and first anchor index in system message queue */
sysMsgQueue->lastMsg = qmsg;
if (!sysMsgQueue->firstMsg)
sysMsgQueue->firstMsg = qmsg;
sysMsgQueue->msgCount++;
}
/* Store message */
msg = &(qmsg->msg);
msg->hwnd = 0;
msg->message = message;
msg->wParam = wParam;
msg->lParam = lParam;
msg->time = time;
msg->pt.x = xPos;
msg->pt.y = yPos;
qmsg->extraInfo = extraInfo;
QUEUE_WakeSomeone( message );
}
/***********************************************************************
* QUEUE_GetQueueTask
*/
HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
{
HTASK16 hTask = 0;
MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
if (queue)
{
hTask = queue->thdb->process->task;
QUEUE_Unlock( queue );
}
return hTask;
}
/***********************************************************************
* QUEUE_IncPaintCount
*/
void QUEUE_IncPaintCount( HQUEUE16 hQueue )
{
MESSAGEQUEUE *queue;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
queue->wPaintCount++;
QUEUE_SetWakeBit( queue, QS_PAINT );
QUEUE_Unlock( queue );
}
/***********************************************************************
* QUEUE_DecPaintCount
*/
void QUEUE_DecPaintCount( HQUEUE16 hQueue )
{
MESSAGEQUEUE *queue;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
queue->wPaintCount--;
if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
QUEUE_Unlock( queue );
}
/***********************************************************************
* QUEUE_IncTimerCount
*/
void QUEUE_IncTimerCount( HQUEUE16 hQueue )
{
MESSAGEQUEUE *queue;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
queue->wTimerCount++;
QUEUE_SetWakeBit( queue, QS_TIMER );
QUEUE_Unlock( queue );
}
/***********************************************************************
* QUEUE_DecTimerCount
*/
void QUEUE_DecTimerCount( HQUEUE16 hQueue )
{
MESSAGEQUEUE *queue;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
queue->wTimerCount--;
if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
QUEUE_Unlock( queue );
}
/***********************************************************************
* PostQuitMessage16 (USER.6)
*/
void WINAPI PostQuitMessage16( INT16 exitCode )
{
PostQuitMessage32( exitCode );
}
/***********************************************************************
* PostQuitMessage32 (USER32.421)
*
* PostQuitMessage() posts a message to the system requesting an
* application to terminate execution. As a result of this function,
* the WM_QUIT message is posted to the application, and
* PostQuitMessage() returns immediately. The exitCode parameter
* specifies an application-defined exit code, which appears in the
* _wParam_ parameter of the WM_QUIT message posted to the application.
*
* CONFORMANCE
*
* ECMA-234, Win32
*/
void WINAPI PostQuitMessage32( INT32 exitCode )
{
MESSAGEQUEUE *queue;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return;
queue->wPostQMsg = TRUE;
queue->wExitCode = (WORD)exitCode;
QUEUE_Unlock( queue );
}
/***********************************************************************
* GetWindowTask16 (USER.224)
*/
HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
{
WND *wndPtr = WIN_FindWndPtr( hwnd );
if (!wndPtr) return 0;
return QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
}
/***********************************************************************
* GetWindowThreadProcessId (USER32.313)
*/
DWORD WINAPI GetWindowThreadProcessId( HWND32 hwnd, LPDWORD process )
{
HTASK16 htask;
TDB *tdb;
WND *wndPtr = WIN_FindWndPtr( hwnd );
if (!wndPtr) return 0;
htask=QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
tdb = (TDB*)GlobalLock16(htask);
if (!tdb || !tdb->thdb) return 0;
if (process) *process = PDB_TO_PROCESS_ID( tdb->thdb->process );
return THDB_TO_THREAD_ID( tdb->thdb );
}
/***********************************************************************
* SetMessageQueue16 (USER.266)
*/
BOOL16 WINAPI SetMessageQueue16( INT16 size )
{
return SetMessageQueue32( size );
}
/***********************************************************************
* SetMessageQueue32 (USER32.494)
*/
BOOL32 WINAPI SetMessageQueue32( INT32 size )
{
/* now obsolete the message queue will be expanded dynamically
as necessary */
/* access the queue to create it if it's not existing */
GetFastQueue();
return TRUE;
}
/***********************************************************************
* InitThreadInput (USER.409)
*/
HQUEUE16 WINAPI InitThreadInput( WORD unknown, WORD flags )
{
HQUEUE16 hQueue;
MESSAGEQUEUE *queuePtr;
THDB *thdb = THREAD_Current();
if (!thdb)
return 0;
hQueue = thdb->teb.queue;
if ( !hQueue )
{
/* Create thread message queue */
if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
{
WARN(msg, "failed!\n");
return FALSE;
}
/* Link new queue into list */
queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
queuePtr->thdb = THREAD_Current();
SYSTEM_LOCK();
SetThreadQueue( 0, hQueue );
thdb->teb.queue = hQueue;
queuePtr->next = hFirstQueue;
hFirstQueue = hQueue;
SYSTEM_UNLOCK();
QUEUE_Unlock( queuePtr );
}
return hQueue;
}
/***********************************************************************
* GetQueueStatus16 (USER.334)
*/
DWORD WINAPI GetQueueStatus16( UINT16 flags )
{
MESSAGEQUEUE *queue;
DWORD ret;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
ret = MAKELONG( queue->changeBits, queue->wakeBits );
queue->changeBits = 0;
QUEUE_Unlock( queue );
return ret & MAKELONG( flags, flags );
}
/***********************************************************************
* GetQueueStatus32 (USER32.283)
*/
DWORD WINAPI GetQueueStatus32( UINT32 flags )
{
MESSAGEQUEUE *queue;
DWORD ret;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
ret = MAKELONG( queue->changeBits, queue->wakeBits );
queue->changeBits = 0;
QUEUE_Unlock( queue );
return ret & MAKELONG( flags, flags );
}
/***********************************************************************
* GetInputState16 (USER.335)
*/
BOOL16 WINAPI GetInputState16(void)
{
return GetInputState32();
}
/***********************************************************************
* WaitForInputIdle (USER32.577)
*/
DWORD WINAPI WaitForInputIdle (HANDLE32 hProcess, DWORD dwTimeOut)
{
FIXME (msg, "(hProcess=%d, dwTimeOut=%ld): stub\n", hProcess, dwTimeOut);
return WAIT_TIMEOUT;
}
/***********************************************************************
* GetInputState32 (USER32.244)
*/
BOOL32 WINAPI GetInputState32(void)
{
MESSAGEQUEUE *queue;
BOOL32 ret;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() )))
return FALSE;
ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
QUEUE_Unlock( queue );
return ret;
}
/***********************************************************************
* UserYield (USER.332)
*/
void WINAPI UserYield(void)
{
TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
if ( !THREAD_IsWin16( THREAD_Current() ) )
{
FIXME(task, "called for Win32 thread (%04x)!\n", THREAD_Current()->teb_sel);
QUEUE_Unlock( queue );
return;
}
/* Handle sent messages */
while (queue && (queue->wakeBits & QS_SENDMESSAGE))
QUEUE_ReceiveMessage( queue );
QUEUE_Unlock( queue );
OldYield();
queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
while (queue && (queue->wakeBits & QS_SENDMESSAGE))
QUEUE_ReceiveMessage( queue );
QUEUE_Unlock( queue );
}
/***********************************************************************
* GetMessagePos (USER.119) (USER32.272)
*
* The GetMessagePos() function returns a long value representing a
* cursor position, in screen coordinates, when the last message
* retrieved by the GetMessage() function occurs. The x-coordinate is
* in the low-order word of the return value, the y-coordinate is in
* the high-order word. The application can use the MAKEPOINT()
* macro to obtain a POINT structure from the return value.
*
* For the current cursor position, use GetCursorPos().
*
* RETURNS
*
* Cursor position of last message on success, zero on failure.
*
* CONFORMANCE
*
* ECMA-234, Win32
*
*/
DWORD WINAPI GetMessagePos(void)
{
MESSAGEQUEUE *queue;
DWORD ret;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
ret = queue->GetMessagePosVal;
QUEUE_Unlock( queue );
return ret;
}
/***********************************************************************
* GetMessageTime (USER.120) (USER32.273)
*
* GetMessageTime() returns the message time for the last message
* retrieved by the function. The time is measured in milliseconds with
* the same offset as GetTickCount().
*
* Since the tick count wraps, this is only useful for moderately short
* relative time comparisons.
*
* RETURNS
*
* Time of last message on success, zero on failure.
*
* CONFORMANCE
*
* ECMA-234, Win32
*
*/
LONG WINAPI GetMessageTime(void)
{
MESSAGEQUEUE *queue;
LONG ret;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
ret = queue->GetMessageTimeVal;
QUEUE_Unlock( queue );
return ret;
}
/***********************************************************************
* GetMessageExtraInfo (USER.288) (USER32.271)
*/
LONG WINAPI GetMessageExtraInfo(void)
{
MESSAGEQUEUE *queue;
LONG ret;
if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
ret = queue->GetMessageExtraInfoVal;
QUEUE_Unlock( queue );
return ret;
}
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