PSP: moved RTC to singleton to allow usage by classes other than Osystem

svn-id: r50116

1 files changed, 87 insertions, 0 deletions

diff --git a/backends/platform/psp/rtc.cpp b/backends/platform/psp/rtc.cpp
new file mode 100644
index 0000000000..57edea7e49
--- /dev/null
+++ b/backends/platform/psp/rtc.cpp
@@ -0,0 +1,87 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/trunk/backends/platform/psp/osys_psp.cpp $
+ * $Id: osys_psp.cpp 49903 2010-06-16 09:04:27Z Bluddy $
+ *
+ */
+
+#include <time.h> 
+#include <psptypes.h>
+#include <psprtc.h>
+ 
+#include "common/scummsys.h" 
+#include "backends/platform/psp/rtc.h" 
+ 
+//#define __PSP_DEBUG_FUNCS__	/* For debugging function calls */
+//#define __PSP_DEBUG_PRINT__	/* For debug printouts */
+
+#include "backends/platform/psp/trace.h"
+
+
+// Class PspRtc ---------------------------------------------------------------
+DECLARE_SINGLETON(PspRtc)
+
+void PspRtc::init() {						// init our starting ticks
+	uint32 ticks[2];
+	sceRtcGetCurrentTick((u64 *)ticks);
+
+	_startMillis = ticks[0]/1000;
+	_startMicros = ticks[0];
+	//_lastMillis = ticks[0]/1000;	//debug - only when we don't subtract startMillis
+}
+
+#define MS_LOOP_AROUND 4294967				/* We loop every 2^32 / 1000 = 71 minutes */
+#define MS_LOOP_CHECK  60000				/* Threading can cause weird mixups without this */
+
+// Note that after we fill up 32 bits ie 50 days we'll loop back to 0, which may cause 
+// unpredictable results
+uint32 PspRtc::getMillis() {
+	uint32 ticks[2];
+	
+	sceRtcGetCurrentTick((u64 *)ticks);		// can introduce weird thread delays
+	
+	uint32 millis = ticks[0]/1000;
+	millis -= _startMillis;					// get ms since start of program
+
+	if ((int)_lastMillis - (int)millis > MS_LOOP_CHECK) {		// we must have looped around
+		if (_looped == false) {					// check to make sure threads do this once
+			_looped = true;
+			_milliOffset += MS_LOOP_AROUND;		// add the needed offset
+			PSP_DEBUG_PRINT("looping around. last ms[%d], curr ms[%d]\n", _lastMillis, millis);
+		}	
+	} else {
+		_looped = false;
+	}
+	
+	_lastMillis = millis;	
+	
+	return millis + _milliOffset;
+}
+
+uint32 PspRtc::getMicros() {
+	uint32 ticks[2];
+	
+	sceRtcGetCurrentTick((u64 *)ticks);
+	ticks[0] -= _startMicros;
+	
+	return ticks[0]; 
+}
+