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