projects / thirdparty / gcc.git / blame
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| 15e38d0d CF |
1 | // chrono -*- C++ -*- |
| 2 | ||
| 3 | // Copyright (C) 2008 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 2, 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 | // You should have received a copy of the GNU General Public License along | |
| 17 | // with this library; see the file COPYING. If not, write to the Free | |
| 18 | // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, | |
| 19 | // USA. | |
| 20 | ||
| 21 | // As a special exception, you may use this file as part of a free software | |
| 22 | // library without restriction. Specifically, if other files instantiate | |
| 23 | // templates or use macros or inline functions from this file, or you compile | |
| 24 | // this file and link it with other files to produce an executable, this | |
| 25 | // file does not by itself cause the resulting executable to be covered by | |
| 26 | // the GNU General Public License. This exception does not however | |
| 27 | // invalidate any other reasons why the executable file might be covered by | |
| 28 | // the GNU General Public License. | |
| 29 | ||
| 30 | #include <chrono> | |
| 31 | ||
| 32 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 | |
| 33 | ||
| 34 | // conditional inclusion of sys/time.h for gettimeofday | |
| 35 | #if !defined(_GLIBCXX_USE_CLOCK_MONOTONIC) && \ | |
| 36 | !defined(_GLIBCXX_USE_CLOCK_REALTIME) && \ | |
| 37 | defined(_GLIBCXX_USE_GETTIMEOFDAY) | |
| 38 | #include <sys/time.h> | |
| 39 | #endif | |
| 40 | ||
| 41 | namespace std | |
| 42 | { | |
| 43 | namespace chrono | |
| 44 | { | |
| 45 | const bool system_clock::is_monotonic; | |
| 46 | ||
| 47 | system_clock::time_point | |
| 48 | system_clock::now() | |
| 49 | { | |
| 50 | #ifdef _GLIBCXX_USE_CLOCK_MONOTONIC | |
| 51 | timespec tp; | |
| 52 | // -EINVAL, -EFAULT | |
| 53 | clock_gettime(CLOCK_MONOTONIC, &tp); | |
| 54 | return time_point(duration(chrono::seconds(tp.tv_sec) | |
| 55 | + chrono::nanoseconds(tp.tv_nsec))); | |
| 56 | #elif defined(_GLIBCXX_USE_CLOCK_REALTIME) | |
| 57 | timespec tp; | |
| 58 | // -EINVAL, -EFAULT | |
| 59 | clock_gettime(CLOCK_REALTIME, &tp); | |
| 60 | return time_point(duration(chrono::seconds(tp.tv_sec) | |
| 61 | + chrono::nanoseconds(tp.tv_nsec))); | |
| 62 | #elif defined(_GLIBCXX_USE_GETTIMEOFDAY) | |
| 63 | timeval tv; | |
| 64 | // EINVAL, EFAULT | |
| 65 | gettimeofday(&tv, NULL); | |
| 66 | return time_point(duration(chrono::seconds(tv.tv_sec) | |
| 67 | + chrono::microseconds(tv.tv_usec))); | |
| 68 | #else | |
| 69 | std::time_t __sec = std::time(0); | |
| 70 | return system_clock::from_time_t(__sec); | |
| 71 | #endif | |
| 72 | } | |
| 73 | } | |
| 74 | } | |
| 75 | ||
| 76 | #endif // _GLIBCXX_USE_C99_STDINT_TR1 |