view src/thread/os2/SDL_systhread.c @ 2349:0381047f2210 gsoc2008_iphone

The class SDL_uikitappdelegate acts as the UIApplicationDelegate for an iPhone SDL project. This class is reponsible for application control flow, including initial setup of working directory, forwarding command line arguments to the user's main function, and handling application termination.
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Thu, 17 Jul 2008 22:29:37 +0000
parents c121d94672cb
children 4436464c4f51
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/*
    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
*/
#include "SDL_config.h"

/* OS/2 thread management routines for SDL */

#include <process.h>
#define INCL_DOSERRORS
#define INCL_DOSPROCESS
#include <os2.h>

#include "SDL_thread.h"
#include "../SDL_systhread.h"
#include "../SDL_thread_c.h"

typedef struct ThreadStartParms
{
    void *args;
    pfnSDL_CurrentEndThread pfnCurrentEndThread;
} tThreadStartParms, *pThreadStartParms;

static void
threadfunc(void *pparm)
{
    pThreadStartParms pThreadParms = pparm;
    pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;

    // Call the thread function!
    SDL_RunThread(pThreadParms->args);

    // Get the current endthread we have to use!
    if (pThreadParms) {
        pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
        SDL_free(pThreadParms);
    }
    // Call endthread!
    if (pfnCurrentEndThread)
        (*pfnCurrentEndThread) ();
}

int
SDL_SYS_CreateThread(SDL_Thread * thread, void *args,
                     pfnSDL_CurrentBeginThread pfnBeginThread,
                     pfnSDL_CurrentEndThread pfnEndThread)
{
    pThreadStartParms pThreadParms = SDL_malloc(sizeof(tThreadStartParms));
    if (!pThreadParms) {
        SDL_SetError("Not enough memory to create thread");
        return (-1);
    }
    // Save the function which we will have to call to clear the RTL of calling app!
    pThreadParms->pfnCurrentEndThread = pfnEndThread;
    // Also save the real parameters we have to pass to thread function
    pThreadParms->args = args;
    // Start the thread using the runtime library of calling app!
    thread->threadid = thread->handle =
        (*pfnBeginThread) (threadfunc, NULL, 512 * 1024, pThreadParms);
    if ((int) thread->threadid <= 0) {
        SDL_SetError("Not enough resources to create thread");
        return (-1);
    }
    return (0);
}

void
SDL_SYS_SetupThread(void)
{
    return;
}

DECLSPEC Uint32 SDLCALL
SDL_ThreadID(void)
{
    PTIB tib;
    DosGetInfoBlocks(&tib, NULL);
    return ((Uint32) (tib->tib_ptib2->tib2_ultid));
}

void
SDL_SYS_WaitThread(SDL_Thread * thread)
{
    TID tid = thread->handle;
    DosWaitThread(&tid, DCWW_WAIT);
}

/* 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)
{
    DosKillThread(thread->handle);
}

/* vi: set ts=4 sw=4 expandtab: */