src/lib/platform/util/timeutils.h

   1 #pragma once
   2 /*
   3  * This file is part of the libCEC(R) library.
   4  *
   5  * libCEC(R) is Copyright (C) 2011-2012 Pulse-Eight Limited.  All rights reserved.
   6  * libCEC(R) is an original work, containing original code.
   7  *
   8  * libCEC(R) is a trademark of Pulse-Eight Limited.
   9  *
  10  * This program is dual-licensed; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  *
  24  *
  25  * Alternatively, you can license this library under a commercial license,
  26  * please contact Pulse-Eight Licensing for more information.
  27  *
  28  * For more information contact:
  29  * Pulse-Eight Licensing       <license@pulse-eight.com>
  30  *     http://www.pulse-eight.com/
  31  *     http://www.pulse-eight.net/
  32  */
  33
  34 #include "../os.h"
  35
  36 #if defined(__APPLE__)
  37 #include <mach/mach_time.h>
  38 #include <CoreVideo/CVHostTime.h>
  39 #elif defined(__WINDOWS__)
  40 #include <time.h>
  41 #else
  42 #include <sys/time.h>
  43 #endif
  44
  45 namespace PLATFORM
  46 {
  47   #if defined(__WINDOWS__)
  48   struct timezone
  49   {
  50     int tz_minuteswest;
  51     int tz_dsttime;
  52   };
  53
  54   #define usleep(t) Sleep((DWORD)(t)/1000)
  55
  56   inline int gettimeofday(struct timeval *pcur_time, struct timezone *tz)
  57   {
  58     if (pcur_time == NULL)
  59     {
  60       SetLastError(EFAULT);
  61       return -1;
  62     }
  63     struct _timeb current;
  64
  65     _ftime(&current);
  66
  67     pcur_time->tv_sec = (long) current.time;
  68     pcur_time->tv_usec = current.millitm * 1000L;
  69     if (tz)
  70     {
  71       tz->tz_minuteswest = current.timezone;    /* minutes west of Greenwich  */
  72       tz->tz_dsttime = current.dstflag;       /* type of dst correction  */
  73     }
  74     return 0;
  75   }
  76   #endif
  77
  78   inline int64_t GetTimeMs()
  79   {
  80   #if defined(__APPLE__)
  81     return (int64_t) (CVGetCurrentHostTime() * 1000 / CVGetHostClockFrequency());
  82   #elif defined(__WINDOWS__)
  83     time_t rawtime;
  84     time(&rawtime);
  85
  86     LARGE_INTEGER tickPerSecond;
  87     LARGE_INTEGER tick;
  88     if (QueryPerformanceFrequency(&tickPerSecond))
  89     {
  90       QueryPerformanceCounter(&tick);
  91       return (int64_t) (tick.QuadPart / 1000.);
  92     }
  93     return -1;
  94   #else
  95     timeval time;
  96     gettimeofday(&time, NULL);
  97     return (int64_t) (time.tv_sec * 1000 + time.tv_usec / 1000);
  98   #endif
  99   }
 100
 101   template <class T>
 102   inline T GetTimeSec()
 103   {
 104     return (T)GetTimeMs() / (T)1000.0;
 105   }
 106
 107   class CTimeout
 108   {
 109   public:
 110     CTimeout(uint32_t iTime) :
 111       m_iTarget(GetTimeMs() + iTime) {}
 112
 113     uint64_t TimeLeft(void) const
 114     {
 115       uint64_t iNow = GetTimeMs();
 116       return (iNow > m_iTarget) ? 0 : m_iTarget - iNow;
 117     }
 118
 119   private:
 120     uint64_t m_iTarget;
 121   };
 122 };