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