1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
// boost thread_clock.cpp -----------------------------------------------------------//
// Copyright 2010 Vicente J. Botet Escriba
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
// See http://www.boost.org/libs/chrono for documentation.
//--------------------------------------------------------------------------------------//
#ifndef BOOST_CHRONO_DETAIL_INLINED_WIN_THREAD_CLOCK_HPP
#define BOOST_CHRONO_DETAIL_INLINED_WIN_THREAD_CLOCK_HPP
#include <boost/chrono/config.hpp>
#include <boost/chrono/thread_clock.hpp>
#include <cassert>
#include <boost/assert.hpp>
#include <boost/detail/winapi/get_last_error.hpp>
#include <boost/detail/winapi/get_current_thread.hpp>
#include <boost/detail/winapi/get_thread_times.hpp>
namespace boost
{
namespace chrono
{
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
thread_clock::time_point thread_clock::now( system::error_code & ec )
{
// note that Windows uses 100 nanosecond ticks for FILETIME
boost::detail::winapi::FILETIME_ creation, exit, user_time, system_time;
if ( boost::detail::winapi::GetThreadTimes(
boost::detail::winapi::GetCurrentThread (), &creation, &exit,
&system_time, &user_time ) )
{
duration user = duration(
((static_cast<duration::rep>(user_time.dwHighDateTime) << 32)
| user_time.dwLowDateTime) * 100 );
duration system = duration(
((static_cast<duration::rep>(system_time.dwHighDateTime) << 32)
| system_time.dwLowDateTime) * 100 );
if (!BOOST_CHRONO_IS_THROWS(ec))
{
ec.clear();
}
return time_point(system+user);
}
else
{
if (BOOST_CHRONO_IS_THROWS(ec))
{
boost::throw_exception(
system::system_error(
boost::detail::winapi::GetLastError(),
BOOST_CHRONO_SYSTEM_CATEGORY,
"chrono::thread_clock" ));
}
else
{
ec.assign( boost::detail::winapi::GetLastError(), BOOST_CHRONO_SYSTEM_CATEGORY );
return thread_clock::time_point(duration(0));
}
}
}
#endif
thread_clock::time_point thread_clock::now() BOOST_NOEXCEPT
{
// note that Windows uses 100 nanosecond ticks for FILETIME
boost::detail::winapi::FILETIME_ creation, exit, user_time, system_time;
if ( boost::detail::winapi::GetThreadTimes(
boost::detail::winapi::GetCurrentThread (), &creation, &exit,
&system_time, &user_time ) )
{
duration user = duration(
((static_cast<duration::rep>(user_time.dwHighDateTime) << 32)
| user_time.dwLowDateTime) * 100 );
duration system = duration(
((static_cast<duration::rep>(system_time.dwHighDateTime) << 32)
| system_time.dwLowDateTime) * 100 );
return time_point(system+user);
}
else
{
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
return time_point();
}
}
} // namespace chrono
} // namespace boost
#endif
|