Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  1. // chrono -*- C++ -*-
  2.  
  3. // Copyright (C) 2008-2013 Free Software Foundation, Inc.
  4. //
  5. // This file is part of the GNU ISO C++ Library.  This library is free
  6. // software; you can redistribute it and/or modify it under the
  7. // terms of the GNU General Public License as published by the
  8. // Free Software Foundation; either version 3, or (at your option)
  9. // any later version.
  10.  
  11. // This library is distributed in the hope that it will be useful,
  12. // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14. // GNU General Public License for more details.
  15.  
  16. // Under Section 7 of GPL version 3, you are granted additional
  17. // permissions described in the GCC Runtime Library Exception, version
  18. // 3.1, as published by the Free Software Foundation.
  19.  
  20. // You should have received a copy of the GNU General Public License and
  21. // a copy of the GCC Runtime Library Exception along with this program;
  22. // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23. // <http://www.gnu.org/licenses/>.
  24.  
  25. #include <bits/c++config.h>
  26. #include <chrono>
  27.  
  28. #ifdef _GLIBCXX_USE_C99_STDINT_TR1
  29.  
  30. // Conditional inclusion of sys/time.h for gettimeofday
  31. #if !defined(_GLIBCXX_USE_CLOCK_MONOTONIC) && \
  32.     !defined(_GLIBCXX_USE_CLOCK_REALTIME) && \
  33.      defined(_GLIBCXX_USE_GETTIMEOFDAY)
  34. #include <sys/time.h>
  35. #endif
  36.  
  37. #ifdef _GLIBCXX_USE_CLOCK_GETTIME_SYSCALL
  38. #include <unistd.h>
  39. #include <sys/syscall.h>
  40. #endif
  41.  
  42. namespace std _GLIBCXX_VISIBILITY(default)
  43. {
  44.   namespace chrono
  45.   {
  46.   _GLIBCXX_BEGIN_NAMESPACE_VERSION
  47.  
  48.     // XXX GLIBCXX_ABI Deprecated
  49.     inline namespace _V2 {
  50.  
  51.     constexpr bool system_clock::is_steady;
  52.  
  53.     system_clock::time_point
  54.     system_clock::now() noexcept
  55.     {
  56. #ifdef _GLIBCXX_USE_CLOCK_REALTIME
  57.       timespec tp;
  58.       // -EINVAL, -EFAULT
  59. #ifdef _GLIBCXX_USE_CLOCK_GETTIME_SYSCALL
  60.       syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
  61. #else
  62.       clock_gettime(CLOCK_REALTIME, &tp);
  63. #endif
  64.       return time_point(duration(chrono::seconds(tp.tv_sec)
  65.                                  + chrono::nanoseconds(tp.tv_nsec)));
  66. #elif defined(_GLIBCXX_USE_GETTIMEOFDAY)
  67.       timeval tv;
  68.       // EINVAL, EFAULT
  69.       gettimeofday(&tv, 0);
  70.       return time_point(duration(chrono::seconds(tv.tv_sec)
  71.                                  + chrono::microseconds(tv.tv_usec)));
  72. #else
  73.       std::time_t __sec = std::time(0);
  74.       return system_clock::from_time_t(__sec);
  75. #endif
  76.     }
  77.  
  78.    
  79.     constexpr bool steady_clock::is_steady;
  80.  
  81.     steady_clock::time_point
  82.     steady_clock::now() noexcept
  83.     {
  84. #ifdef _GLIBCXX_USE_CLOCK_MONOTONIC
  85.       timespec tp;
  86.       // -EINVAL, -EFAULT
  87. #ifdef _GLIBCXX_USE_CLOCK_GETTIME_SYSCALL
  88.       syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
  89. #else
  90.       clock_gettime(CLOCK_MONOTONIC, &tp);
  91. #endif
  92.       return time_point(duration(chrono::seconds(tp.tv_sec)
  93.                                  + chrono::nanoseconds(tp.tv_nsec)));
  94. #else
  95.       return time_point(system_clock::now().time_since_epoch());
  96. #endif
  97.     }
  98.  
  99.   } // end inline namespace _V2
  100.  
  101.   _GLIBCXX_END_NAMESPACE_VERSION
  102.   } // namespace chrono
  103. } // namespace std
  104.  
  105. #endif // _GLIBCXX_USE_C99_STDINT_TR1
  106.