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85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
/*=========================================================================
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Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
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Language: C++
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Date: $Date$
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Version: $Revision$
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Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
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See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notices for more information.
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=========================================================================*/
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#ifndef cmVariableWatch_h
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#define cmVariableWatch_h
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#include "cmStandardIncludes.h"
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class cmMakefile;
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/** \class cmVariableWatch
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* \brief Helper class for watching of variable accesses.
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*
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* Calls function when variable is accessed
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*/
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class cmVariableWatch
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{
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public:
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typedef void (*WatchMethod)(const std::string& variable, int access_type,
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void* client_data, const char* newValue, const cmMakefile* mf);
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cmVariableWatch();
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~cmVariableWatch();
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/**
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* Add watch to the variable
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*/
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void AddWatch(const std::string& variable, WatchMethod method,
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void* client_data=0);
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void RemoveWatch(const std::string& variable, WatchMethod method);
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/**
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* This method is called when variable is accessed
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*/
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void VariableAccessed(const std::string& variable, int access_type,
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const char* newValue, const cmMakefile* mf) const;
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/**
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* Different access types.
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*/
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enum
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{
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VARIABLE_READ_ACCESS = 0,
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UNKNOWN_VARIABLE_READ_ACCESS,
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ALLOWED_UNKNOWN_VARIABLE_READ_ACCESS,
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VARIABLE_MODIFIED_ACCESS,
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VARIABLE_REMOVED_ACCESS,
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NO_ACCESS
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};
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/**
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* Return the access as string
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*/
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static const char* GetAccessAsString(int access_type);
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protected:
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struct Pair
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{
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WatchMethod Method;
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void* ClientData;
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Pair() : Method(0), ClientData(0) {}
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};
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typedef std::vector< Pair > VectorOfPairs;
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typedef std::map<cmStdString, VectorOfPairs > StringToVectorOfPairs;
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StringToVectorOfPairs WatchMap;
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};
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#endif
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