90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License 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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typedef void (*DeleteData)(void* client_data);
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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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bool AddWatch(const std::string& variable, WatchMethod method,
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void* client_data=0, DeleteData delete_data=0);
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void RemoveWatch(const std::string& variable, WatchMethod method,
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void* client_data=0);
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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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UNKNOWN_VARIABLE_DEFINED_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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DeleteData DeleteDataCall;
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Pair() : Method(0), ClientData(0), DeleteDataCall(0) {}
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~Pair()
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{
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if (this->DeleteDataCall && this->ClientData)
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{
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this->DeleteDataCall(this->ClientData);
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}
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}
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};
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typedef std::vector< Pair* > VectorOfPairs;
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typedef std::map<std::string, VectorOfPairs > StringToVectorOfPairs;
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StringToVectorOfPairs WatchMap;
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};
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#endif
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