MacOS platform support.

Engine/source/platformMac/macTime.mm

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+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#import <CoreServices/CoreServices.h>
+#import <mach/mach_time.h>
+#import "platform/platformTimer.h"
+#import <time.h>
+#import <unistd.h>
+
+//--------------------------------------
+
+static U32 sgCurrentTime = 0;
+
+//--------------------------------------
+void Platform::getLocalTime(LocalTime &lt)
+{
+   struct tm systime;
+   time_t long_time;
+
+   /// Get time as long integer.
+   time( &long_time );
+   /// Convert to local time, thread safe.
+   localtime_r( &long_time, &systime );
+   
+   /// Fill the return struct
+   lt.sec      = systime.tm_sec;
+   lt.min      = systime.tm_min;
+   lt.hour     = systime.tm_hour;
+   lt.month    = systime.tm_mon;
+   lt.monthday = systime.tm_mday;
+   lt.weekday  = systime.tm_wday;
+   lt.year     = systime.tm_year;
+   lt.yearday  = systime.tm_yday;
+   lt.isdst    = systime.tm_isdst;
+}   
+
+String Platform::localTimeToString( const LocalTime &lt )
+{
+   tm systime;
+   
+   systime.tm_sec    = lt.sec;
+   systime.tm_min    = lt.min;
+   systime.tm_hour   = lt.hour;
+   systime.tm_mon    = lt.month;
+   systime.tm_mday   = lt.monthday;
+   systime.tm_wday   = lt.weekday;
+   systime.tm_year   = lt.year;
+   systime.tm_yday   = lt.yearday;
+   systime.tm_isdst  = lt.isdst;
+
+   return asctime( &systime );
+}
+
+/// Gets the time in seconds since the Epoch
+U32 Platform::getTime()
+{
+   time_t epoch_time;
+   time( &epoch_time );
+   return epoch_time;
+}   
+
+/// Gets the time in milliseconds since some epoch. In this case, system start time.
+/// Storing milliseconds in a U32 overflows every 49.71 days
+U32 Platform::getRealMilliseconds()
+{
+   const uint32_t oneMillion = 1000000;
+   static mach_timebase_info_data_t s_timebase_info;
+   
+   if (s_timebase_info.denom == 0) {
+      (void) mach_timebase_info(&s_timebase_info);
+   }
+   
+   // mach_absolute_time() returns billionth of seconds,
+   // so divide by one million to get milliseconds
+   return (U32)((mach_absolute_time() * s_timebase_info.numer) / (oneMillion * s_timebase_info.denom));
+}
+
+U32 Platform::getVirtualMilliseconds()
+{
+   return sgCurrentTime;   
+}   
+
+void Platform::advanceTime(U32 delta)
+{
+   sgCurrentTime += delta;
+}   
+
+/// Asks the operating system to put the process to sleep for at least ms milliseconds
+void Platform::sleep(U32 ms)
+{
+    // note: this will overflow if you want to sleep for more than 49 days. just so ye know.
+    usleep( ms * 1000 );
+}
+
+//----------------------------------------------------------------------------------
+PlatformTimer* PlatformTimer::create()
+{
+   return new DefaultPlatformTimer;
+}
+
+void Platform::fileToLocalTime(const FileTime & ft, LocalTime * lt)
+{
+   if(!lt)
+      return;
+      
+   time_t long_time = ft;
+
+   struct tm systime;
+
+   /// Convert to local time, thread safe.
+   localtime_r( &long_time, &systime );
+   
+   /// Fill the return struct
+   lt->sec      = systime.tm_sec;
+   lt->min      = systime.tm_min;
+   lt->hour     = systime.tm_hour;
+   lt->month    = systime.tm_mon;
+   lt->monthday = systime.tm_mday;
+   lt->weekday  = systime.tm_wday;
+   lt->year     = systime.tm_year;
+   lt->yearday  = systime.tm_yday;
+   lt->isdst    = systime.tm_isdst;
+}
+