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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef _VOS_EXECABL_HXX_
#define _VOS_EXECABL_HXX_
# include <vos/types.hxx>
# include <vos/refernce.hxx>
namespace vos
{
/** IExecutable
The IExecutable-interface is to be understood as wrapper around
your application-code, which allows it to be executed asynchronously.
Wether you want real asynchronous behaviour or just pseudo-multitasking
depends on which kind of execution-service you use to execute your executable.
(E.g. Threadpool/Fiberpool)
@author Bernd Hofner
@version 0.1
*/
class IExecutable : public NAMESPACE_VOS(IReference)
{
public:
/** Overload to implement your functionality.
Return True, if you want "execute()" to be called again.
*/
virtual sal_Bool SAL_CALL execute()= 0;
/** If you use blocking calls within your execute-function,
you should provide here a means to unblock cleanly.
@Return False if you are not able to unblock the
thread.
*/
virtual sal_Bool SAL_CALL unblock()= 0;
/**
STL demands this operators if you want to place
IExecutables per value in collections.
*/
virtual sal_Bool SAL_CALL operator<(const IExecutable&) const= 0;
virtual sal_Bool SAL_CALL operator>(const IExecutable&) const= 0;
virtual sal_Bool SAL_CALL operator==(const IExecutable&) const= 0;
virtual sal_Bool SAL_CALL operator!=(const IExecutable&) const= 0;
};
/** OExecutable
added default impl. of IReferenceCounter
*/
class OExecutable : public NAMESPACE_VOS(IExecutable),
public NAMESPACE_VOS(OReference)
{
public:
virtual ~OExecutable()
{
}
/*
Since the dominance of the OReferenceCounter impl.
of the IReferenceCounter is not granted, delegate
the methods to this branch of the diamond-shaped
inheritance tree.
*/
virtual RefCount SAL_CALL acquire()
{
return OReference::acquire();
}
virtual RefCount SAL_CALL release()
{
return OReference::release();
}
virtual RefCount SAL_CALL referenced() const
{
return OReference::referenced();
}
/** Default implementation of unblock does nothing.
*/
virtual sal_Bool SAL_CALL unblock() { return sal_True; }
/**
STL demands this operators if you want to place
IExecutables per value in collections.
Use a default implementation of the comparison-operators
here without a correct semantic.
*/
virtual sal_Bool SAL_CALL operator<(const IExecutable&) const
{
return sal_False;
}
virtual sal_Bool SAL_CALL operator>(const IExecutable&) const
{
return sal_False;
}
virtual sal_Bool SAL_CALL operator==(const IExecutable&) const
{
return sal_True;
}
virtual sal_Bool SAL_CALL operator!=(const IExecutable&) const
{
return sal_False;
}
};
}
#endif // _VOS_EXECABL_HXX_
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