Import SDL release-1.2.15

Change-Id: I505c4aea24325cad475f217db5589814b4c75dbf

1 files changed, 152 insertions, 0 deletions

diff --git a/distrib/sdl-1.2.15/src/timer/macos/SDL_MPWtimer.c b/distrib/sdl-1.2.15/src/timer/macos/SDL_MPWtimer.c
new file mode 100644
index 0000000..114b6c7
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/timer/macos/SDL_MPWtimer.c
@@ -0,0 +1,152 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 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_MACOS
+
+#include <Types.h>
+#include <Timer.h>
+#include <OSUtils.h>
+#include <Gestalt.h>
+#include <Processes.h>
+
+#include <LowMem.h>
+
+#include "SDL_timer.h"
+#include "../SDL_timer_c.h"
+
+#define MS_PER_TICK	(1000/60)		/* MacOS tick = 1/60 second */
+
+/* Note: This is only a step above the original 1/60s implementation.
+ *       For a good implementation, see FastTimes.[ch], by Matt Slot.
+ */
+#define USE_MICROSECONDS
+#define WideTo64bit(w)	(*(UInt64 *) &(w))
+
+UInt64 start;
+
+void SDL_StartTicks(void)
+{
+#ifdef USE_MICROSECONDS
+	UnsignedWide now;
+	
+	Microseconds(&now);
+	start = WideTo64bit(now);
+#else
+	/* FIXME: Should we implement a wrapping algorithm, like Win32? */
+#endif
+}
+
+Uint32 SDL_GetTicks(void)
+{
+#ifdef USE_MICROSECONDS
+	UnsignedWide now;
+	
+	Microseconds(&now);
+	return (Uint32)((WideTo64bit(now)-start)/1000);
+#else
+	return(LMGetTicks()*MS_PER_TICK);
+#endif
+}
+
+void SDL_Delay(Uint32 ms)
+{
+#ifdef USE_MICROSECONDS
+	Uint32 end_ms;
+	
+	end_ms = SDL_GetTicks() + ms;
+	do {
+		/* FIXME: Yield CPU? */ ;
+	} while ( SDL_GetTicks() < end_ms );
+#else
+	UInt32		unused; /* MJS */
+	Delay(ms/MS_PER_TICK, &unused);
+#endif
+}
+
+
+/* Data to handle a single periodic alarm */
+typedef struct _ExtendedTimerRec
+{
+	TMTask		     tmTask;
+	ProcessSerialNumber  taskPSN;
+} ExtendedTimerRec, *ExtendedTimerPtr;
+
+static ExtendedTimerRec gExtendedTimerRec;
+
+
+int SDL_SYS_TimerInit(void)
+{
+	/* We don't need a setup? */
+	return(0);
+}
+
+void SDL_SYS_TimerQuit(void)
+{
+	/* We don't need a cleanup? */
+	return;
+}
+
+/* Our Stub routine to set up and then call the real routine. */
+pascal void TimerCallbackProc(TMTaskPtr tmTaskPtr)
+{
+	Uint32 ms;
+
+	WakeUpProcess(&((ExtendedTimerPtr) tmTaskPtr)->taskPSN);
+
+	ms = SDL_alarm_callback(SDL_alarm_interval);
+	if ( ms ) {
+		SDL_alarm_interval = ROUND_RESOLUTION(ms);
+		PrimeTime((QElemPtr)&gExtendedTimerRec.tmTask,
+		          SDL_alarm_interval);
+	} else {
+		SDL_alarm_interval = 0;
+	}
+}
+
+int SDL_SYS_StartTimer(void)
+{
+	/*
+	 * Configure the global structure that stores the timing information.
+	 */
+	gExtendedTimerRec.tmTask.qLink = NULL;
+	gExtendedTimerRec.tmTask.qType = 0;
+	gExtendedTimerRec.tmTask.tmAddr = NewTimerUPP(TimerCallbackProc);
+	gExtendedTimerRec.tmTask.tmCount = 0;
+	gExtendedTimerRec.tmTask.tmWakeUp = 0;
+	gExtendedTimerRec.tmTask.tmReserved = 0;
+	GetCurrentProcess(&gExtendedTimerRec.taskPSN);
+
+	/* Install the task record */
+	InsXTime((QElemPtr)&gExtendedTimerRec.tmTask);
+
+	/* Go! */
+	PrimeTime((QElemPtr)&gExtendedTimerRec.tmTask, SDL_alarm_interval);
+	return(0);
+}
+
+void SDL_SYS_StopTimer(void)
+{
+	RmvTime((QElemPtr)&gExtendedTimerRec.tmTask);
+}
+
+#endif /* SDL_TIMER_MACOS */