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//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// DESCRIPTION:
// Main program, simply calls D_DoomMain high level loop.
//
#include "config.h"
#include <stdio.h>
#include "SDL.h"
#include "doomtype.h"
#include "i_system.h"
#include "m_argv.h"
//
// D_DoomMain()
// Not a globally visible function, just included for source reference,
// calls all startup code, parses command line options.
//
void D_DoomMain (void);
#if defined(_WIN32_WCE)
// Windows CE? I doubt it even supports SMP..
static void LockCPUAffinity(void)
{
}
#elif defined(_WIN32)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
typedef BOOL (WINAPI *SetAffinityFunc)(HANDLE hProcess, DWORD mask);
// This is a bit more complicated than it really needs to be. We really
// just need to call the SetProcessAffinityMask function, but that
// function doesn't exist on systems before Windows 2000. Instead,
// dynamically look up the function and call the pointer to it. This
// way, the program will run on older versions of Windows (Win9x, etc.)
static void LockCPUAffinity(void)
{
HMODULE kernel32_dll;
SetAffinityFunc SetAffinity;
// Find the kernel interface DLL.
kernel32_dll = LoadLibrary("kernel32.dll");
if (kernel32_dll == NULL)
{
// This should never happen...
fprintf(stderr, "Failed to load kernel32.dll\n");
return;
}
// Find the SetProcessAffinityMask function.
SetAffinity = (SetAffinityFunc)GetProcAddress(kernel32_dll, "SetProcessAffinityMask");
// If the function was not found, we are on an old (Win9x) system
// that doesn't have this function. That's no problem, because
// those systems don't support SMP anyway.
if (SetAffinity != NULL)
{
if (!SetAffinity(GetCurrentProcess(), 1))
{
fprintf(stderr, "Failed to set process affinity (%d)\n",
(int) GetLastError());
}
}
}
#elif defined(HAVE_SCHED_SETAFFINITY)
#include <unistd.h>
#include <sched.h>
// Unix (Linux) version:
static void LockCPUAffinity(void)
{
#ifdef CPU_SET
cpu_set_t set;
CPU_ZERO(&set);
CPU_SET(0, &set);
sched_setaffinity(getpid(), sizeof(set), &set);
#else
unsigned long mask = 1;
sched_setaffinity(getpid(), sizeof(mask), &mask);
#endif
}
#else
#warning No known way to set processor affinity on this platform.
#warning You may experience crashes due to SDL_mixer.
static void LockCPUAffinity(void)
{
fprintf(stderr,
"WARNING: No known way to set processor affinity on this platform.\n"
" You may experience crashes due to SDL_mixer.\n");
}
#endif
int main(int argc, char **argv)
{
// save arguments
myargc = argc;
myargv = argv;
// Only schedule on a single core, if we have multiple
// cores. This is to work around a bug in SDL_mixer.
LockCPUAffinity();
M_FindResponseFile();
// start doom
D_DoomMain ();
return 0;
}
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