WinUtility.hpp

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#ifndef GOSU_WINUTILITY_HPP
#define GOSU_WINUTILITY_HPP

#include <windows.h>
#include <Gosu/Platform.hpp>
#include <boost/function.hpp>
#include <boost/shared_ptr.hpp>
#include <string>

namespace Gosu
{
    namespace Win
    {
        HINSTANCE instance();

        void handleMessage();

        void processMessages();

        void registerMessageHook(const boost::function<bool (MSG&)>& hook);
        
        GOSU_NORETURN void throwLastError(const std::string& action = "");

        template<typename T>
        inline T check(T valToCheck, const std::string& action = "")
        {
            if (!valToCheck)
                throwLastError(action);
            return valToCheck;
        }

        // IMPR: Why can't I use mem_fn for releasing objects even though it is
        // shown like that in the shared_ptr documentation?
        template<typename T>
        void releaseComPtr(T* ptr)
        {
            ptr->Release();
        }

        template<typename T>
        inline boost::shared_ptr<T> shareComPtr(T* ptr)
        {
            return boost::shared_ptr<T>(ptr, releaseComPtr<T>);
        }

        std::wstring appFilename();

        std::wstring appDirectory();
    }
}

#endif

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