--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/riscos/SDL_systhread.c	Fri Sep 17 13:20:10 2004 +0000
@@ -0,0 +1,149 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2004 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+/* RISC OS version based on pthreads linux source */
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+#include "SDL_systhread.h"
+
+#ifdef DISABLE_THREADS
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	SDL_SetError("Threads have not been compiled into this version of the library");
+	return(-1);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return(0);
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	return;
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	return;
+}
+
+#else
+
+#include <signal.h>
+
+/* List of signals to mask in the subthreads */
+static int sig_list[] = {
+	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
+	SIGVTALRM, SIGPROF, 0
+};
+
+#include <pthread.h>
+
+int riscos_using_threads = 0;
+Uint32 riscos_main_thread = 0; /* Thread running events */
+
+static void *RunThread(void *data)
+{
+	SDL_RunThread(data);
+	pthread_exit((void*)0);
+	return((void *)0);		/* Prevent compiler warning */
+}
+
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	pthread_attr_t type;
+
+	/* Set the thread attributes */
+	if ( pthread_attr_init(&type) != 0 ) {
+		SDL_SetError("Couldn't initialize pthread attributes");
+		return(-1);
+	}
+	pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
+
+	/* Create the thread and go! */
+	if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) {
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+
+        if (riscos_using_threads == 0)
+        {
+           riscos_using_threads = 1;
+           riscos_main_thread = SDL_ThreadID();
+        }
+      
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	int i;
+	sigset_t mask;
+
+	/* Mask asynchronous signals for this thread */
+	sigemptyset(&mask);
+	for ( i=0; sig_list[i]; ++i ) {
+		sigaddset(&mask, sig_list[i]);
+	}
+	pthread_sigmask(SIG_BLOCK, &mask, 0);
+	
+#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
+	/* Allow ourselves to be asynchronously cancelled */
+	{ int oldstate;
+		pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
+	}
+#endif
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return((Uint32)pthread_self());
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	pthread_join(thread->handle, 0);
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
+	pthread_cancel(thread->handle);
+#else
+	pthread_kill(thread->handle, SIGKILL);
+#endif
+}
+
+#endif