blob: 006cd1706e2b1c835bf8536f93baf988f9b1ab63 (
plain)
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
|
// @file mongo/util/timer-win32-inl.h
/* Copyright 2010 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Inline function implementations for the Windows-specific implementation of the
* Timer class. Windows selects the best available timer, in its estimation, for
* measuring time at high resolution. This may be the HPET of the TSC on x86 systems,
* but is promised to be synchronized across processors, barring BIOS errors.
*
* Do not include directly. Include "mongo/util/timer.h".
*/
#pragma once
#define MONGO_TIMER_IMPL_WIN32
#include "mongo/platform/windows_basic.h"
#include "mongo/util/assert_util.h"
namespace mongo {
unsigned long long Timer::now() const {
LARGE_INTEGER i;
fassert(16161, QueryPerformanceCounter(&i));
return i.QuadPart;
}
} // namespace mongo
|
