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///////////////////////////////////////////////////////////////////////////////
// Name: wx/recguard.h
// Purpose: declaration and implementation of wxRecursionGuard class
// Author: Vadim Zeitlin
// Modified by:
// Created: 14.08.2003
// RCS-ID: $Id: recguard.h 61508 2009-07-23 20:30:22Z VZ $
// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_RECGUARD_H_
#define _WX_RECGUARD_H_
#include "wx/defs.h"
// ----------------------------------------------------------------------------
// wxRecursionGuardFlag is used with wxRecursionGuard
// ----------------------------------------------------------------------------
typedef int wxRecursionGuardFlag;
// ----------------------------------------------------------------------------
// wxRecursionGuard is the simplest way to protect a function from reentrancy
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxRecursionGuard
{
public:
wxRecursionGuard(wxRecursionGuardFlag& flag)
: m_flag(flag)
{
m_isInside = flag++ != 0;
}
~wxRecursionGuard()
{
wxASSERT_MSG( m_flag > 0, wxT("unbalanced wxRecursionGuards!?") );
m_flag--;
}
bool IsInside() const { return m_isInside; }
private:
wxRecursionGuardFlag& m_flag;
// true if the flag had been already set when we were created
bool m_isInside;
};
#endif // _WX_RECGUARD_H_
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