Wanesa's ddopreload.exe

// ddopreload.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"


//#pragma optimize( "", off )
unsigned char __declspec(noinline) readMapFile( void * k, DWORD i )
{
    return *((unsigned char *)k+i);
}
//#pragma optimize( "", on )

void cleanupMemory() {
    _tprintf_s(_T("Allocating space for cache...\n"));
    HANDLE hmap = CreateFileMapping(0,0,PAGE_READWRITE,0,1280*1024*1024,0);
    void *p = MapViewOfFile(hmap,FILE_MAP_ALL_ACCESS,0,0,0);
    for (DWORD i = 0; i < 1280*1024*1024; i+=1024) {
        *((unsigned char *)p+i) = 1;
    }
    UnmapViewOfFile(p);
    CloseHandle(hmap);
}

void preloadFile(LPCTSTR fname) {

    HANDLE h = CreateFile(fname,GENERIC_READ,FILE_SHARE_READ|FILE_SHARE_WRITE,0,OPEN_EXISTING,0,0);
    if (h == 0 || h == INVALID_HANDLE_VALUE) {
        _ftprintf_s(stderr,_T("Can't open file '%s'\n"),fname);
        return;
    }
    HANDLE hmap = CreateFileMapping(h,0,PAGE_READONLY ,0,0,0);
    CloseHandle(h);
    if (hmap == 0 || hmap == INVALID_HANDLE_VALUE)
    {
        _ftprintf_s(stderr,_T("Can't open mapping for file '%s'\n"),fname);
        return;
    }
    void *k = MapViewOfFile(hmap,FILE_MAP_READ ,0,0,0);
    if (k == 0) {
        _ftprintf_s(stderr,_T("Can't map file '%s'\n"),fname);
        CloseHandle(hmap);
        return;
    }

    MEMORY_BASIC_INFORMATION inf;
    VirtualQuery(k,&inf,sizeof(inf));
    _tprintf_s(_T("Preloading file: '%s' (%u KiB)\n"),fname,inf.RegionSize/1024);
    byte b = 0;
    for (DWORD i = 0; i < inf.RegionSize; i+=1024) {
        b = b ^ readMapFile(k,i);

    }

    CloseHandle(hmap);
    printf("Done: %d\n",b);
}

int _tmain(int argc, _TCHAR* argv[])
{
    STARTUPINFO nfo;
    ZeroMemory(&nfo,sizeof(nfo));
    PROCESS_INFORMATION pi;
    nfo.cb = sizeof(nfo);
    CreateProcess(_T("TurbineLauncher.exe"),_T("TurbineLauncher.exe -invoker"),0,0,0,0,0,0,&nfo,&pi);
    WaitForInputIdle(pi.hProcess,INFINITE);
    cleanupMemory();
    preloadFile(_T("dndclient.exe"));
//  preloadFile(_T("client_surface.dat"));
//  preloadFile(_T("client_local_English.dat"));
//  preloadFile(_T("client_general.dat"));
    preloadFile(_T("client_gamelogic.dat"));
/*  preloadFile(_T("client_map_1.dat"));
    preloadFile(_T("client_map_2.dat"));
    preloadFile(_T("client_mesh.dat"));
    preloadFile(_T("client_cell_2.dat"));
    preloadFile(_T("client_cell_1.dat"));*/
}