#ifndef OPENMW_COMPONENTS_MISC_GUARDED_H #define OPENMW_COMPONENTS_MISC_GUARDED_H #include <mutex> #include <memory> #include <condition_variable> namespace Misc { template <class T> class Locked { public: Locked(std::mutex& mutex, T& value) : mLock(mutex), mValue(value) {} T& get() const { return mValue.get(); } T* operator ->() const { return std::addressof(get()); } T& operator *() const { return get(); } private: std::unique_lock<std::mutex> mLock; std::reference_wrapper<T> mValue; }; template <class T> class ScopeGuarded { public: ScopeGuarded() : mMutex() , mValue() {} ScopeGuarded(const T& value) : mMutex() , mValue(value) {} ScopeGuarded(T&& value) : mMutex() , mValue(std::move(value)) {} template <class ... Args> ScopeGuarded(Args&& ... args) : mMutex() , mValue(std::forward<Args>(args) ...) {} ScopeGuarded(const ScopeGuarded& other) : mMutex() , mValue(other.lock().get()) {} ScopeGuarded(ScopeGuarded&& other) : mMutex() , mValue(std::move(other.lock().get())) {} Locked<T> lock() { return Locked<T>(mMutex, mValue); } Locked<const T> lockConst() { return Locked<const T>(mMutex, mValue); } template <class Predicate> void wait(std::condition_variable& cv, Predicate&& predicate) { std::unique_lock<std::mutex> lock(mMutex); cv.wait(lock, [&] { return predicate(mValue); }); } private: std::mutex mMutex; T mValue; }; } #endif