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/* 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];
}
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