lyx_mirror/src/frontends/qt4/InGuiThread.h
Peter Kümmel ad51a8e88e bind makes a copy of the arguments by default. This is secure if the
bound object survives the existance of the arguments, but it also breaks
"change by non-const reference"  parameter passing, like in
Alert::askForString. Here the arguments exists the whole bound function
call so we could pass by refernce.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@35789 a592a061-630c-0410-9148-cb99ea01b6c8
2010-10-23 00:06:22 +00:00

177 lines
3.0 KiB
C++

// -*- C++ -*-
/**
* \file InGuiThread.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Peter Kümmel
*
* Full author contact details are available in file CREDITS.
*/
#ifndef INGUITHREAD_H
#define INGUITHREAD_H
#include <QMutex>
#include <QObject>
#include <QWaitCondition>
#include "support/bind.h"
#include "support/functional.h"
namespace lyx {
namespace frontend {
class IntoGuiThreadMover : public QObject
{
Q_OBJECT
protected:
IntoGuiThreadMover();
void callInGuiThread();
Q_SIGNALS:
void triggerFunctionCall();
private Q_SLOTS:
void doFunctionCall();
private:
virtual void synchronousFunctionCall() = 0;
QWaitCondition condition_;
QMutex sync_mutex_;
};
template<class R>
class InGuiThread : private IntoGuiThreadMover
{
public:
InGuiThread() {}
template<class F>
R call(F f)
{
func_ = f;
callInGuiThread();
return return_value_;
}
template<class F, class P1>
R call(F f, P1& p1)
{
return call(bind(f, ref(p1)));
}
template<class F, class P1, class P2>
R call(F f, P1& p1, P2& p2)
{
return call(bind(f, ref(p1), ref(p2)));
}
template<class F, class P1, class P2, class P3>
R call(F f, P1& p1, P2& p2, P3& p3)
{
return call(bind(f, ref(p1), ref(p2), ref(p3)));
}
template<class F, class P1, class P2, class P3, class P4>
R call(F f, P1& p1, P2& p2, P3& p3, P4& p4)
{
return call(bind(f, ref(p1), ref(p2), ref(p3), ref(p4)));
}
/*
...
*/
template<class F, class P1, class P2, class P3, class P4, class P5, class P6, class P7, class P8>
R call(F f, P1& p1, P2& p2, P3& p3, P4& p4, P5& p5, P6& p6, P7& p7, P8& p8)
{
return call(bind(f, ref(p1), ref(p2), ref(p3), ref(p4), ref(p5), ref(p6), ref(p7), ref(p8)));
}
private:
void synchronousFunctionCall()
{
return_value_ = func_();
}
private:
R return_value_;
function<R()> func_;
};
// void specialisation
template<>
class InGuiThread<void> : private IntoGuiThreadMover
{
public:
InGuiThread() {}
template<class F>
void call(F f)
{
func_ = f;
callInGuiThread();
}
template<class F, class P1>
void call(F f, P1& p1)
{
call(bind(f, ref(p1)));
}
template<class F, class P1, class P2>
void call(F f, P1& p1, P2& p2)
{
call(bind(f, ref(p1), ref(p2)));
}
template<class F, class P1, class P2, class P3>
void call(F f, P1& p1, P2& p2, P3& p3)
{
call(bind(f, ref(p1), ref(p2), ref(p3)));
}
template<class F, class P1, class P2, class P3, class P4>
void call(F f, P1& p1, P2& p2, P3& p3, P4& p4)
{
call(bind(f, ref(p1), ref(p2), ref(p3), ref(p4)));
}
/*
...
*/
template<class F, class P1, class P2, class P3, class P4, class P5, class P6, class P7, class P8>
void call(F f, P1& p1, P2& p2, P3& p3, P4& p4, P5& p5, P6& p6, P7& p7, P8& p8)
{
call(bind(f, ref(p1), ref(p2), ref(p3), ref(p4), ref(p5), ref(p6), ref(p7), ref(p8)));
}
private:
void synchronousFunctionCall()
{
func_();
}
private:
function<void()> func_;
};
} // namespace frontend
} // namespace lyx
#endif // INGUITHREAD_H