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
|
// @file mongo/util/timer-inl.h
/* Copyright 2010 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
/**
* Inline function implementations for the Timer class. This file simply selects
* the platform-appropriate inline functions to include.
*
* This file should only be included through timer-inl.h, which selects the
* particular implementation based on target platform.
*/
#pragma once
#if defined(MONGO_HAVE_HEADER_UNISTD_H)
#include <unistd.h>
#endif
#if defined(_WIN32)
// On Windows, prefer the Windows-specific implementation, which employs QueryPerformanceCounter.
#include "mongo/util/timer-win32-inl.h"
#elif defined(_POSIX_TIMERS) and _POSIX_TIMERS > 0 and defined(_POSIX_MONOTONIC_CLOCK) and _POSIX_MONOTONIC_CLOCK > 0
// On systems that support the POSIX clock_gettime function, and the "monotonic" clock,
// use those.
#include "mongo/util/timer-posixclock-inl.h"
#else
// If all else fails, fall back to a generic implementation. Performance may suffer.
#include "mongo/util/timer-generic-inl.h"
#endif
|
