src/thread/riscos/SDL_systhread.c
author Sam Lantinga <slouken@libsdl.org>
Fri, 17 Sep 2004 13:20:10 +0000
changeset 955 d74fbf56f2f6
child 1312 c9b51268668f
permissions -rw-r--r--
Date: Fri, 25 Jun 2004 13:29:15 +0100 From: "alan buckley" Subject: Modification for RISC OS version of SDL Ive attached a zip file with the changes to this email, it contains the following: The file sdldiff.txt is the output from cvs diff u. . The directory thread/riscos contains all the new files to support threading. Readme.riscos is a new readme file to add.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2004 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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/* RISC OS version based on pthreads linux source */
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#ifdef SAVE_RCSID
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static char rcsid =
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 "@(#) $Id$";
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#endif
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#include "SDL_error.h"
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#include "SDL_thread.h"
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#include "SDL_systhread.h"
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#ifdef DISABLE_THREADS
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int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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{
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	SDL_SetError("Threads have not been compiled into this version of the library");
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	return(-1);
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}
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void SDL_SYS_SetupThread(void)
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{
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	return;
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}
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Uint32 SDL_ThreadID(void)
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{
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	return(0);
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}
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void SDL_SYS_WaitThread(SDL_Thread *thread)
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{
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	return;
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}
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void SDL_SYS_KillThread(SDL_Thread *thread)
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{
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	return;
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}
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#else
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#include <signal.h>
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/* List of signals to mask in the subthreads */
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static int sig_list[] = {
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	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
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	SIGVTALRM, SIGPROF, 0
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};
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#include <pthread.h>
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int riscos_using_threads = 0;
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Uint32 riscos_main_thread = 0; /* Thread running events */
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static void *RunThread(void *data)
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{
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	SDL_RunThread(data);
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	pthread_exit((void*)0);
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	return((void *)0);		/* Prevent compiler warning */
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}
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int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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{
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	pthread_attr_t type;
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	/* Set the thread attributes */
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	if ( pthread_attr_init(&type) != 0 ) {
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		SDL_SetError("Couldn't initialize pthread attributes");
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		return(-1);
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	}
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	pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
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	/* Create the thread and go! */
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	if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) {
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		SDL_SetError("Not enough resources to create thread");
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		return(-1);
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	}
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        if (riscos_using_threads == 0)
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        {
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           riscos_using_threads = 1;
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           riscos_main_thread = SDL_ThreadID();
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        }
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	return(0);
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}
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void SDL_SYS_SetupThread(void)
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{
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	int i;
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	sigset_t mask;
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	/* Mask asynchronous signals for this thread */
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	sigemptyset(&mask);
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	for ( i=0; sig_list[i]; ++i ) {
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		sigaddset(&mask, sig_list[i]);
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	}
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	pthread_sigmask(SIG_BLOCK, &mask, 0);
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#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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	/* Allow ourselves to be asynchronously cancelled */
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	{ int oldstate;
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		pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
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	}
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#endif
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}
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Uint32 SDL_ThreadID(void)
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{
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	return((Uint32)pthread_self());
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}
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void SDL_SYS_WaitThread(SDL_Thread *thread)
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{
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	pthread_join(thread->handle, 0);
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}
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void SDL_SYS_KillThread(SDL_Thread *thread)
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{
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#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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	pthread_cancel(thread->handle);
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#else
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	pthread_kill(thread->handle, SIGKILL);
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#endif
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}
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#endif