diff options
Diffstat (limited to 'backends/platform/psp/rtc.cpp')
-rw-r--r-- | backends/platform/psp/rtc.cpp | 87 |
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]; +} + |