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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 .
*/
#ifndef INCLUDED_VCL_INC_SALTIMER_HXX
#define INCLUDED_VCL_INC_SALTIMER_HXX
#include <sal/config.h>
#include <vcl/dllapi.h>
#include "salwtype.hxx"
/*
* note: there will be only a single instance of SalTimer
* SalTimer originally had only static methods, but
* this needed to be virtualized for the sal plugin migration
*/
class VCL_PLUGIN_PUBLIC SalTimer
{
SALTIMERPROC m_pProc;
public:
SalTimer() : m_pProc( nullptr ) {}
virtual ~SalTimer() COVERITY_NOEXCEPT_FALSE;
// AutoRepeat and Restart
virtual void Start( sal_uInt64 nMS ) = 0;
virtual void Stop() = 0;
// Callbacks (indepen in \sv\source\app\timer.cxx)
void SetCallback( SALTIMERPROC pProc )
{
m_pProc = pProc;
}
void CallCallback()
{
if( m_pProc )
m_pProc();
}
};
class VersionedEvent
{
/**
* The "additional event data" members on macOS are integers, so we can't
* use an unsigned integer and rely on the defined unsigned overflow in
* InvalidateEvent().
*/
sal_Int32 m_nEventVersion;
bool m_bIsValidVersion;
public:
VersionedEvent() : m_nEventVersion( 0 ), m_bIsValidVersion( false ) {}
sal_Int32 GetNextEventVersion()
{
InvalidateEvent();
m_bIsValidVersion = true;
return m_nEventVersion;
}
void InvalidateEvent()
{
if ( m_bIsValidVersion )
{
if ( m_nEventVersion == SAL_MAX_INT32 )
m_nEventVersion = 0;
else
++m_nEventVersion;
m_bIsValidVersion = false;
}
}
bool ExistsValidEvent() const
{
return m_bIsValidVersion;
}
bool IsValidEventVersion( const sal_Int32 nEventVersion ) const
{
return m_bIsValidVersion && nEventVersion == m_nEventVersion;
}
};
#endif // INCLUDED_VCL_INC_SALTIMER_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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