projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | // |
| 2 | // high_res_clock.hpp | |
| 3 | // ~~~~~~~~~~~~~~~~~~ | |
| 4 | // | |
| b32b8144 | 5 | // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| 7c673cae FG |
6 | // |
| 7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 9 | // | |
| 10 | ||
| 11 | #ifndef HIGH_RES_CLOCK_HPP | |
| 12 | #define HIGH_RES_CLOCK_HPP | |
| 13 | ||
| 14 | #include <boost/config.hpp> | |
| 15 | #include <boost/cstdint.hpp> | |
| 16 | ||
| 17 | #if defined(BOOST_ASIO_WINDOWS) | |
| 18 | ||
| 19 | inline boost::uint64_t high_res_clock() | |
| 20 | { | |
| 21 | LARGE_INTEGER i; | |
| 22 | QueryPerformanceCounter(&i); | |
| 23 | return i.QuadPart; | |
| 24 | } | |
| 25 | ||
| 26 | #elif defined(__GNUC__) && defined(__x86_64__) | |
| 27 | ||
| 28 | inline boost::uint64_t high_res_clock() | |
| 29 | { | |
| 30 | unsigned long low, high; | |
| 31 | __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high)); | |
| 32 | return (((boost::uint64_t)high) << 32) | low; | |
| 33 | } | |
| 34 | ||
| 35 | #else | |
| 36 | ||
| 37 | #include <boost/date_time/posix_time/posix_time_types.hpp> | |
| 38 | ||
| 39 | inline boost::uint64_t high_res_clock() | |
| 40 | { | |
| 41 | boost::posix_time::ptime now = | |
| 42 | boost::posix_time::microsec_clock::universal_time(); | |
| 43 | ||
| 44 | boost::posix_time::ptime epoch( | |
| 45 | boost::gregorian::date(1970, 1, 1), | |
| 46 | boost::posix_time::seconds(0)); | |
| 47 | ||
| 48 | return (now - epoch).total_microseconds(); | |
| 49 | } | |
| 50 | ||
| 51 | #endif | |
| 52 | ||
| 53 | #endif // HIGH_RES_CLOCK_HPP |