SDL-mirror/src/thread/win32/SDL_systhread.c

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/

/* Win32 thread management routines for SDL */

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

#ifndef _WIN32_WCE
#include <process.h>
#endif

#include "SDL_error.h"
#include "SDL_thread.h"
#include "SDL_systhread.h"


static unsigned __stdcall RunThread(void *data)
{
	SDL_RunThread(data);
	return(0);
}

int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
{
	unsigned threadid;

	/*
	 * Avoid CreateThread: https://bugzilla.libsdl.org/show_bug.cgi?id=22
	 *
	 * have to use _beginthreadex if we want the returned handle
	 * to be accessible after the thread exits
	 * threads created with _beginthread auto-close the handle
	 * Windows CE still use CreateThread.
	 */
#ifdef _WIN32_WCE
	thread->handle = CreateThread(NULL, 0, RunThread, args, 0, &threadid);
#else
	thread->handle = (SYS_ThreadHandle) _beginthreadex(NULL, 0, RunThread,
			args, 0, &threadid);
#endif
	if (thread->handle == NULL) {
		SDL_SetError("Not enough resources to create thread");
		return(-1);
	}
	return(0);
}

void SDL_SYS_SetupThread(void)
{
	return;
}

Uint32 SDL_ThreadID(void)
{
	return((Uint32)GetCurrentThreadId());
}

void SDL_SYS_WaitThread(SDL_Thread *thread)
{
	WaitForSingleObject(thread->handle, INFINITE);
	CloseHandle(thread->handle);
}

/* WARNING: This function is really a last resort.
 * Threads should be signaled and then exit by themselves.
 * TerminateThread() doesn't perform stack and DLL cleanup.
 */
void SDL_SYS_KillThread(SDL_Thread *thread)
{
	TerminateThread(thread->handle, FALSE);
}