MRS_MemReport.h

//Memory Leak Checker - "MemReport" by Chris Armitt
//Programmer and Co-Founder of indie game dev team Molten Rock Studios
/*
    Make sure you include this header file into every one of your header files and the file where your application
    entry point is. (i.e. void main, or int main)

    In your entry point, before anything else, have 'MRS_MemReport::GetInstance()',
    This will call the constructor of the singleton, setting up the logger.

    At the end of your entry point, put 'MRS_MemReport::GetInstance().Report()'
    and this will print all the memory leaks found within the program.

    Example:

    #include "MRS_MemReport.h"
    int main()
    {
        MRS_MemReport::GetInstance();

        //Application processing stuff

        MRS_MemReport::GetInstance().Report()
        return 0;
    }

    Once your application has ended, check the output window in your visual studio to see if you have any memory leaks,
    if you do, it will tell you where they are!

    !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    !!!
    !!!     Warning: It might return false positives on memory leaks if you have static classes or static based singletons
    !!!     instiantate objects and rely on their destructors to clean up. To avoid this, add a shutdown function for each
    !!!     of these classes and have the function contain the cleanup code. Make sure you call these shutdown functions
    !!!     before you call 'MRS_MemReport::GetInstance().Report()'
    !!!
    !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
*/

#ifdef _DEBUG
    #ifndef _MRS_MEMREPORT_H

        #define _MRS_MEMREPORT_H

        #include <map>
        #include <sstream>
        #include <Windows.h>

        #pragma warning(disable: 4291)

        struct MRS_AllocInfo
        {
        public:
            std::string     filename;
            int             line;

            MRS_AllocInfo(std::string fn, int ln)
            {
                filename    = fn;
                line        = ln;
            }
        };

        class MRS_MemReport
        {
        private:
            std::map<void *, MRS_AllocInfo> m_Leaks;
            MRS_MemReport();

        public:
            ~MRS_MemReport();
            static MRS_MemReport & GetInstance();
            static bool s_bLog;

            void LogNew(void* ptr, std::string file, int line);
            void LogDelete( void* ptr );

            void Report();
        };

        void * operator new( unsigned int size, const char *filename, int line );
        void   operator delete( void *ptr );
        void   operator delete[]( void *ptr );

        #undef new
        #define new new(__FILE__, __LINE__)

    #endif //#ifndef _MRS_MEMREPORT_H
#endif