--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/libsdl-trunk/src/timer/riscos/SDL_systimer.c	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,233 @@
+/*
+    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"
+
+#ifdef SDL_TIMER_RISCOS
+
+#include <stdio.h>
+#include <time.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include "SDL_timer.h"
+#include "../SDL_timer_c.h"
+
+#if SDL_THREADS_DISABLED
+/* Timer  SDL_arraysize(Timer ),start/reset time */
+static Uint32 timerStart;
+/* Timer running function */
+void RISCOS_CheckTimer();
+#else
+#include <pthread.h>
+extern Uint32 riscos_main_thread;
+extern int riscos_using_threads;
+extern Uint32 SDL_ThreadID();
+extern Uint32 SDL_EventThreadID(void);
+#endif
+
+
+extern void RISCOS_BackgroundTasks(void);
+
+/* The first ticks value of the application */
+clock_t start;
+
+void SDL_StartTicks(void)
+{
+	/* Set first ticks value */
+	start = clock();
+}
+
+Uint32 SDL_GetTicks (void)
+{
+	clock_t ticks;
+
+	ticks=clock()-start;
+
+
+#if CLOCKS_PER_SEC == 1000
+
+	return(ticks);
+
+#elif CLOCKS_PER_SEC == 100
+
+	return (ticks * 10);
+
+#else
+
+	return ticks*(1000/CLOCKS_PER_SEC);
+
+#endif
+
+}
+
+void SDL_Delay (Uint32 ms)
+{
+    Uint32 now,then,elapsed;
+#if !SDL_THREADS_DISABLED
+    int is_event_thread;
+    if (riscos_using_threads)
+    {
+       is_event_thread = 0;
+       if (SDL_EventThreadID())
+       {
+          if (SDL_EventThreadID() == SDL_ThreadID()) is_event_thread = 1;
+       } else if (SDL_ThreadID() == riscos_main_thread) is_event_thread = 1;
+    } else is_event_thread = 1;
+#endif
+
+        /*TODO: Next version of Unixlib may allow us to use usleep here */
+        /*      for non event threads */
+
+	/* Set the timeout interval - Linux only needs to do this once */
+	then = SDL_GetTicks();
+
+	do {
+		/* Do background tasks required while sleeping as we are not multithreaded */
+#if SDL_THREADS_DISABLED
+		RISCOS_BackgroundTasks();
+#else
+		/* For threaded build only run background tasks in event thread */
+		if (is_event_thread) RISCOS_BackgroundTasks();
+#endif
+
+		/* Calculate the time interval left (in case of interrupt) */
+		now = SDL_GetTicks();
+		elapsed = (now-then);
+		then = now;
+		if ( elapsed >= ms ) {
+			break;
+		}
+		ms -= elapsed;
+#if !SDL_THREADS_DISABLED
+            /* Need to yield to let other threads have a go */
+            if (riscos_using_threads) pthread_yield();
+#endif
+
+	} while ( 1 );
+}
+
+#if SDL_THREADS_DISABLED
+
+/* Non-threaded version of timer */
+
+int SDL_SYS_TimerInit(void)
+{
+	return(0);
+}
+
+void SDL_SYS_TimerQuit(void)
+{
+	SDL_SetTimer(0, NULL);
+}
+
+int SDL_SYS_StartTimer(void)
+{
+	timerStart = SDL_GetTicks();
+
+	return(0);
+}
+
+void SDL_SYS_StopTimer(void)
+{
+	/* Don't need to do anything as we use SDL_timer_running
+	   to detect if we need to check the timer */
+}
+
+
+void RISCOS_CheckTimer()
+{
+	if (SDL_timer_running && SDL_GetTicks() - timerStart >= SDL_alarm_interval)
+	{
+		Uint32 ms;
+
+		ms = SDL_alarm_callback(SDL_alarm_interval);
+		if ( ms != SDL_alarm_interval )
+		{
+			if ( ms )
+			{
+				SDL_alarm_interval = ROUND_RESOLUTION(ms);
+			} else
+			{
+				SDL_alarm_interval = 0;
+				SDL_timer_running = 0;
+			}
+		}
+		if (SDL_alarm_interval) timerStart = SDL_GetTicks();
+	}
+}
+
+#else
+
+/* Threaded version of timer - based on code for linux */
+
+#include "SDL_thread.h"
+
+/* Data to handle a single periodic alarm */
+static int timer_alive = 0;
+static SDL_Thread *timer = NULL;
+
+static int RunTimer(void *unused)
+{
+	while ( timer_alive ) {
+		if ( SDL_timer_running ) {
+			SDL_ThreadedTimerCheck();
+		}
+		SDL_Delay(1);
+	}
+	return(0);
+}
+
+/* This is only called if the event thread is not running */
+int SDL_SYS_TimerInit(void)
+{
+	timer_alive = 1;
+	timer = SDL_CreateThread(RunTimer, NULL);
+	if ( timer == NULL )
+		return(-1);
+	return(SDL_SetTimerThreaded(1));
+}
+
+void SDL_SYS_TimerQuit(void)
+{
+	timer_alive = 0;
+	if ( timer ) {
+		SDL_WaitThread(timer, NULL);
+		timer = NULL;
+	}
+}
+
+int SDL_SYS_StartTimer(void)
+{
+	SDL_SetError("Internal logic error: RISC OS uses threaded timer");
+	return(-1);
+}
+
+void SDL_SYS_StopTimer(void)
+{
+	return;
+}
+
+#endif /* SDL_THREADS_DISABLED */
+
+#endif /* SDL_TIMER_RISCOS */