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ae5e97a005
They are unused, but if someone used them they would lead to problems since they would copy the internal raw pointers and the destructor would cause double delete
87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#ifndef cmVariableWatch_h
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#define cmVariableWatch_h
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#include "cmConfigure.h" // IWYU pragma: keep
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#include <map>
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#include <memory> // IWYU pragma: keep
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#include <string>
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#include <vector>
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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,
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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 = nullptr, DeleteData delete_data = nullptr);
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void RemoveWatch(const std::string& variable, WatchMethod method,
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void* client_data = nullptr);
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/**
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* This method is called when variable is accessed
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*/
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bool 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 = nullptr;
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void* ClientData = nullptr;
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DeleteData DeleteDataCall = nullptr;
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~Pair()
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{
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if (this->DeleteDataCall && this->ClientData) {
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this->DeleteDataCall(this->ClientData);
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}
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}
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Pair() = default;
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Pair(const Pair&) = delete;
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Pair& operator=(const Pair&) = delete;
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};
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typedef std::vector<std::shared_ptr<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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