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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <svsys.h>
#include <win/saldata.hxx>
#include <win/saltimer.h>
#include <win/salinst.h>
static void CALLBACK SalTimerProc(PVOID pParameter, BOOLEAN bTimerOrWaitFired);
// See http://msdn.microsoft.com/en-us/library/windows/desktop/ms687003%28v=vs.85%29.aspx
// (and related pages) for details about the Timer Queues.
// in order to prevent concurrent execution of ImplSalStartTimer and double
// deletion of timer (which is extremely likely, given that
// INVALID_HANDLE_VALUE waits for the callback to run on the main thread),
// this must run on the main thread too
void ImplSalStopTimer()
{
SalData *const pSalData = GetSalData();
assert( !pSalData->mpFirstInstance || pSalData->mnAppThreadId == GetCurrentThreadId() );
HANDLE hTimer = pSalData->mnTimerId;
if (hTimer)
{
pSalData->mnTimerId = nullptr;
DeleteTimerQueueTimer(nullptr, hTimer, INVALID_HANDLE_VALUE);
}
// remove all pending SAL_MSG_TIMER_CALLBACK messages
// we always have to do this, since ImplSalStartTimer with 0ms just queues
// a new SAL_MSG_TIMER_CALLBACK message
// PM_QS_POSTMESSAGE is needed, so we don't process the SendMessage from DoYield!
MSG aMsg;
int nMsgCount = 0;
while ( PeekMessageW(&aMsg, nullptr, SAL_MSG_TIMER_CALLBACK,
SAL_MSG_TIMER_CALLBACK, PM_REMOVE | PM_NOYIELD | PM_QS_POSTMESSAGE) )
nMsgCount++;
assert( nMsgCount <= 1 );
}
void ImplSalStartTimer( sal_uLong nMS )
{
SalData* pSalData = GetSalData();
assert( !pSalData->mpFirstInstance || pSalData->mnAppThreadId == GetCurrentThreadId() );
// DueTime parameter is a DWORD, which is always an unsigned 32bit
if (nMS > SAL_MAX_UINT32)
nMS = SAL_MAX_UINT32;
// cannot change a one-shot timer, so delete it and create a new one
ImplSalStopTimer();
// keep the scheduler running, if a 0ms timer / Idle is scheduled
pSalData->mbOnIdleRunScheduler = ( 0 == nMS );
// probably WT_EXECUTEONLYONCE is not needed, but it enforces Period
// to be 0 and should not hurt; also see
// https://www.microsoft.com/msj/0499/pooling/pooling.aspx
CreateTimerQueueTimer(&pSalData->mnTimerId, nullptr, SalTimerProc, nullptr,
nMS, 0, WT_EXECUTEINTIMERTHREAD | WT_EXECUTEONLYONCE);
}
WinSalTimer::~WinSalTimer()
{
Stop();
}
void WinSalTimer::Start( sal_uLong nMS )
{
SalData* pSalData = GetSalData();
if ( pSalData->mpFirstInstance && pSalData->mnAppThreadId != GetCurrentThreadId() )
{
BOOL const ret = PostMessageW(pSalData->mpFirstInstance->mhComWnd,
SAL_MSG_STARTTIMER, 0, (LPARAM)GetTickCount() + nMS);
SAL_WARN_IF(0 == ret, "vcl", "ERROR: PostMessage() failed!");
}
else
ImplSalStartTimer( nMS );
}
void WinSalTimer::Stop()
{
SalData* pSalData = GetSalData();
if ( pSalData->mpFirstInstance && pSalData->mnAppThreadId != GetCurrentThreadId() )
{
BOOL const ret = PostMessageW(pSalData->mpFirstInstance->mhComWnd,
SAL_MSG_STOPTIMER, 0, 0);
SAL_WARN_IF(0 == ret, "vcl", "ERROR: PostMessage() failed!");
}
else
ImplSalStopTimer();
}
/** This gets invoked from a Timer Queue thread.
Don't acquire the SolarMutex to avoid deadlocks, just wake up the main thread
at better resolution than 10ms.
*/
static void CALLBACK SalTimerProc(PVOID, BOOLEAN)
{
__try
{
SalData* pSalData = GetSalData();
// always post message when the timer fires, we will remove the ones
// that happened during execution of the callback later directly from
// the message queue
BOOL const ret = PostMessageW(pSalData->mpFirstInstance->mhComWnd,
SAL_MSG_TIMER_CALLBACK, 0, 0);
#if OSL_DEBUG_LEVEL > 0
if (0 == ret) // SEH prevents using SAL_WARN here?
fputs("ERROR: PostMessage() failed!", stderr);
#endif
}
__except(WinSalInstance::WorkaroundExceptionHandlingInUSER32Lib(GetExceptionCode(), GetExceptionInformation()))
{
}
}
/** Called in the main thread.
We assured that by posting the message from the SalTimeProc only, the real
call then happens when the main thread gets SAL_MSG_TIMER_CALLBACK.
*/
void EmitTimerCallback()
{
// Test for MouseLeave
SalTestMouseLeave();
ImplSVData *pSVData = ImplGetSVData();
if ( ! pSVData->maSchedCtx.mpSalTimer )
return;
ImplSalYieldMutexAcquireWithWait();
pSVData->maSchedCtx.mpSalTimer->CallCallback();
ImplSalYieldMutexRelease();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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