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 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 *************************************************************/



#include <svpm.h>

#define _SV_SALTIMER_CXX
#include <os2/saldata.hxx>
#include <os2/saltimer.h>
#include <os2/salinst.h>

// =======================================================================

// Maximale Periode
#define MAX_SYSPERIOD	  65533
#define IDTIMER				10

// =======================================================================

void ImplSalStartTimer( ULONG nMS, sal_Bool bMutex )
{
	SalData*	pSalData = GetSalData();

	// Periode darf nicht zu gross sein, da OS2 2.11 mit USHORT arbeitet
	// Remenber the time of the timer
	pSalData->mnTimerMS = nMS;
	if ( !bMutex )
		pSalData->mnTimerOrgMS = nMS;

	// Periode darf nicht zu gross sein, da Windows mit USHORT arbeitet
	if ( nMS > MAX_SYSPERIOD )
		nMS = MAX_SYSPERIOD;

	// Gibt es einen Timer, dann zerstoren
	if ( pSalData->mnTimerId )
		WinStopTimer( pSalData->mhAB, pSalData->mpFirstInstance->mhComWnd, pSalData->mnTimerId );

	// Make a new timer with new period
	pSalData->mnTimerId = WinStartTimer( pSalData->mhAB, pSalData->mpFirstInstance->mhComWnd, IDTIMER, nMS );
	pSalData->mnNextTimerTime = pSalData->mnLastEventTime + nMS;
}

// -----------------------------------------------------------------------

Os2SalTimer::~Os2SalTimer()
{
}

// -----------------------------------------------------------------------

void Os2SalTimer::Start( ULONG nMS )
{
	// Um auf Main-Thread umzuschalten
	SalData* pSalData = GetSalData();
	if ( pSalData->mpFirstInstance )
	{
		if ( pSalData->mnAppThreadId != GetCurrentThreadId() )
			WinPostMsg( pSalData->mpFirstInstance->mhComWnd, SAL_MSG_STARTTIMER, 0, (MPARAM)nMS );
		else
			WinSendMsg( pSalData->mpFirstInstance->mhComWnd, SAL_MSG_STARTTIMER, 0, (MPARAM)nMS );
	}
	else
		ImplSalStartTimer( nMS, FALSE);
}

// -----------------------------------------------------------------------

void Os2SalTimer::Stop()
{
	SalData*	pSalData = GetSalData();

	// Exitstiert ein Timer, dann diesen zerstoeren
	if ( pSalData->mnTimerId ) {
		WinStopTimer( pSalData->mhAB, pSalData->mpFirstInstance->mhComWnd, pSalData->mnTimerId );
		pSalData->mnTimerId = 0;
		pSalData->mnNextTimerTime = 0;
	}
}

// -----------------------------------------------------------------------

void SalTimerProc( HWND, UINT, UINT nId, ULONG )
{
	SalData* pSalData = GetSalData();
	ImplSVData* pSVData = ImplGetSVData();

	// Test for MouseLeave
	SalTestMouseLeave();

	bool bRecursive = pSalData->mbInTimerProc && (nId != SALTIMERPROC_RECURSIVE);
	if ( pSVData->mpSalTimer && ! bRecursive )
	{
		// Try to acquire the mutex. If we don't get the mutex then we
		// try this a short time later again.
		if ( ImplSalYieldMutexTryToAcquire() )
		{
			bRecursive = pSalData->mbInTimerProc && (nId != SALTIMERPROC_RECURSIVE);
			if ( pSVData->mpSalTimer && ! bRecursive )
			{
				pSalData->mbInTimerProc = TRUE;
				pSVData->mpSalTimer->CallCallback();
				pSalData->mbInTimerProc = FALSE;
				ImplSalYieldMutexRelease();

				// Run the timer in the correct time, if we start this
				// with a small timeout, because we don't get the mutex
				if ( pSalData->mnTimerId &&
					(pSalData->mnTimerMS != pSalData->mnTimerOrgMS) )
					ImplSalStartTimer( pSalData->mnTimerOrgMS, FALSE );
			}
		}
		else
			ImplSalStartTimer( 10, TRUE );
	}

}