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 "env.h"
  35 #include "lib/platform/os.h"
  36
  37 #if defined(__APPLE__)
  38 #include <mach/mach_time.h>
  39 #include <CoreVideo/CVHostTime.h>
  40 #elif defined(__WINDOWS__)
  41 #include <time.h>
  42 #else
  43 #include <time.h>
  44 #include <sys/time.h>
  45 #endif
  46
  47 namespace PLATFORM
  48 {
  49   #if defined(__WINDOWS__)
  50   struct timezone
  51   {
  52     int tz_minuteswest;
  53     int tz_dsttime;
  54   };
  55
  56   #define usleep(t) Sleep((DWORD)(t)/1000)
  57
  58   inline int gettimeofday(struct timeval *pcur_time, struct timezone *tz)
  59   {
  60     if (pcur_time == NULL)
  61     {
  62       SetLastError(EFAULT);
  63       return -1;
  64     }
  65     struct _timeb current;
  66
  67     _ftime(&current);
  68
  69     pcur_time->tv_sec = (long) current.time;
  70     pcur_time->tv_usec = current.millitm * 1000L;
  71     if (tz)
  72     {
  73       tz->tz_minuteswest = current.timezone;    /* minutes west of Greenwich  */
  74       tz->tz_dsttime = current.dstflag;       /* type of dst correction  */
  75     }
  76     return 0;
  77   }
  78   #endif
  79
  80   inline int64_t GetTimeMs()
  81   {
  82   #if defined(__APPLE__)
  83     return (int64_t) (CVGetCurrentHostTime() / (int64_t)(CVGetHostClockFrequency() * 0.001));
  84   #elif defined(__WINDOWS__)
  85     LARGE_INTEGER tickPerSecond;
  86     LARGE_INTEGER tick;
  87     if (QueryPerformanceFrequency(&tickPerSecond))
  88     {
  89       QueryPerformanceCounter(&tick);
  90       return (int64_t) (tick.QuadPart / (tickPerSecond.QuadPart / 1000.));
  91     }
  92     return -1;
  93   #else
  94     timespec time;
  95     clock_gettime(CLOCK_MONOTONIC, &time);
  96     return (int64_t)time.tv_sec * 1000 + time.tv_nsec / 1000000;
  97   #endif
  98   }
  99
 100   template <class T>
 101   inline T GetTimeSec()
 102   {
 103     return (T)GetTimeMs() / (T)1000.0;
 104   }
 105
 106   class CTimeout
 107   {
 108   public:
 109     CTimeout(void) : m_iTarget(0) {}
 110     CTimeout(uint32_t iTimeout) { Init(iTimeout); }
 111
 112     bool IsSet(void) const       { return m_iTarget > 0; }
 113     void Init(uint32_t iTimeout) { m_iTarget = GetTimeMs() + iTimeout; }
 114
 115     uint32_t TimeLeft(void) const
 116     {
 117       uint64_t iNow = GetTimeMs();
 118       return (iNow > m_iTarget) ? 0 : (uint32_t)(m_iTarget - iNow);
 119     }
 120
 121   private:
 122     uint64_t m_iTarget;
 123   };
 124 };