r_thread.c

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/*
Copyright(c) 1997-2001 Id Software, Inc.
Copyright(c) 2006 Quake2World.

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.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#include "r_local.h"
#include "../../ports/system.h"

#include <unistd.h>
#include <SDL_thread.h>

renderer_threadstate_t r_threadstate;

#define THREAD_SLEEP_INTERVAL 100

int R_RunThread (void *p)
{
    Com_DPrintf(DEBUG_RENDERER, "R_RunThread: %d\n", SDL_ThreadID());

    while (r_threads->integer) {
        if (!refdef.ready) {
            Sys_Sleep(THREAD_SLEEP_INTERVAL);
            continue;
        }

        /* the renderer is up, so busy-wait for it */
        while (r_threadstate.state != THREAD_BSP)
            Sys_Sleep(0);

        R_SetupFrustum();

        /* draw brushes on current worldlevel */
        R_GetLevelSurfaceLists();

        r_threadstate.state = THREAD_RENDERER;
    }

    return 0;
}

void R_ShutdownThreads (void)
{
    if (r_threadstate.thread)
        SDL_KillThread(r_threadstate.thread);

    r_threadstate.thread = NULL;
}

void R_InitThreads (void)
{
    r_threadstate.thread = SDL_CreateThread(R_RunThread, NULL);
}