c/c++启动函数startup

标签：cpp

__declspec(noinline)
int
__tmainCRTStartup(
         void
         )
{
        int initret;
        int mainret=0;
        int managedapp;
#ifdef _WINMAIN_
        _TUCHAR *lpszCommandLine;
        STARTUPINFOW StartupInfo;

        GetStartupInfoW( &StartupInfo );
#endif  /* _WINMAIN_ */

#ifdef _M_IX86
        /*
         * Enable app termination when heap corruption is detected on
         * Windows Vista and above. This is a no-op on down-level OS's
         * and enabled by default for 64-bit processes.
         */

        if (!_NoHeapEnableTerminationOnCorruption)
        {
            HeapSetInformation(NULL, HeapEnableTerminationOnCorruption, NULL, 0);
        }
#endif  /* _M_IX86 */

        /*
         * Determine if this is a managed application
         */
        managedapp = check_managed_app();

        if ( !_heap_init() )                /* initialize heap */
            fast_error_exit(_RT_HEAPINIT);  /* write message and die */

        if( !_mtinit() )                    /* initialize multi-thread */
            fast_error_exit(_RT_THREAD);    /* write message and die */

        /* Enable buffer count checking if linking against static lib */
        _CrtSetCheckCount(TRUE);

        /*
         * Initialize the Runtime Checks stuff
         */
#ifdef _RTC
        _RTC_Initialize();
#endif  /* _RTC */
        /*
         * Guard the remainder of the initialization code and the call
         * to user's main, or WinMain, function in a __try/__except
         * statement.
         */

        __try {

            if ( _ioinit() < 0 )            /* initialize lowio */
                _amsg_exit(_RT_LOWIOINIT);

            /* get wide cmd line info */
            _tcmdln = (_TSCHAR *)GetCommandLineT();

            /* get wide environ info */
            _tenvptr = (_TSCHAR *)GetEnvironmentStringsT();

            if ( _tsetargv() < 0 )
                _amsg_exit(_RT_SPACEARG);
            if ( _tsetenvp() < 0 )
                _amsg_exit(_RT_SPACEENV);

            initret = _cinit(TRUE);                  /* do C data initialize */
            if (initret != 0)
                _amsg_exit(initret);

#ifdef _WINMAIN_

            lpszCommandLine = _twincmdln();
            mainret = _tWinMain( (HINSTANCE)&__ImageBase,         WinMain函数
                                 NULL,
                                 lpszCommandLine,
                                 StartupInfo.dwFlags & STARTF_USESHOWWINDOW
                                      ? StartupInfo.wShowWindow
                                      : SW_SHOWDEFAULT
                                );
#else  /* _WINMAIN_ */
            _tinitenv = _tenviron;
            mainret = _tmain(__argc, _targv, _tenviron);   此处才是真正的main函数
#endif  /* _WINMAIN_ */

            if ( !managedapp )
                exit(mainret);                             执行完后调用exit函数

            _cexit();                                      做善后处理

        }
        __except ( _XcptFilter(GetExceptionCode(), GetExceptionInformation()) )
        {
            /*
             * Should never reach here
             */

            mainret = GetExceptionCode();

            if ( !managedapp )
                _exit(mainret);

            _c_exit();

        } /* end of try - except */

        return mainret;
}

c/c++启动函数startup

标签：cpp

原文地址：http://blog.csdn.net/u011185633/article/details/44872669