/************************************************* * Mutex Source File * * (C) 1999-2007 The Botan Project * *************************************************/ #include #include namespace Botan { /************************************************* * Mutex_Holder Constructor * *************************************************/ Mutex_Holder::Mutex_Holder(Mutex* m) : mux(m) { if(!mux) throw Invalid_Argument("Mutex_Holder: Argument was NULL"); mux->lock(); } /************************************************* * Mutex_Holder Destructor * *************************************************/ Mutex_Holder::~Mutex_Holder() { mux->unlock(); } /************************************************* * Named_Mutex_Holder Constructor * *************************************************/ Named_Mutex_Holder::Named_Mutex_Holder(const std::string& name) : mutex_name(name) { global_state().get_named_mutex(mutex_name)->lock(); } /************************************************* * Named_Mutex_Holder Destructor * *************************************************/ Named_Mutex_Holder::~Named_Mutex_Holder() { global_state().get_named_mutex(mutex_name)->unlock(); } /************************************************* * Default Mutex Factory * *************************************************/ Mutex* Default_Mutex_Factory::make() { class Default_Mutex : public Mutex { public: class Mutex_State_Error : public Internal_Error { public: Mutex_State_Error(const std::string& where) : Internal_Error("Default_Mutex::" + where + ": " + "Mutex is already " + where + "ed") {} }; void lock() { if(locked) throw Mutex_State_Error("lock"); locked = true; } void unlock() { if(!locked) throw Mutex_State_Error("unlock"); locked = false; } Default_Mutex() { locked = false; } private: bool locked; }; return new Default_Mutex; } }