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
|
/*****************************************************************************
Copyright (c) 2013, 2014, Facebook, Inc. All Rights Reserved.
Copyright (c) 2014, 2018, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/********************************************************************//**
@file include/ut0timer.h
Timer routines
Created 30/07/2014 Jan Lindström jan.lindstrom@skysql.com
modified from https://github.com/facebook/mysql-5.6/commit/c75a413edeb96eb99bf11d7269bdfea06f96d6b6
*************************************************************************/
#ifndef ut0timer_h
#define ut0timer_h
#include "univ.i"
/* Current timer stats */
extern struct my_timer_unit_info ut_timer;
/**************************************************************//**
Function pointer to point selected timer function.
@return timer current value */
extern ulonglong (*ut_timer_now)(void);
/**************************************************************//**
Sets up the data required for use of my_timer_* functions.
Selects the best timer by high frequency, and tight resolution.
Points my_timer_now() to the selected timer function.
Initializes my_timer struct to contain the info for selected timer.*/
UNIV_INTERN
void ut_init_timer(void);
/**************************************************************//**
Convert native timer units in a ulonglong into microseconds in a double
@return time in microseconds */
UNIV_INLINE
double
ut_timer_to_microseconds(
/*=====================*/
ulonglong when); /*!< in: time where to calculate */
/**************************************************************//**
Convert microseconds in a double to native timer units in a ulonglong
@return time in microseconds */
UNIV_INLINE
ulonglong
ut_microseconds_to_timer(
/*=====================*/
ulonglong when); /*!< in: time where to calculate */
#ifndef UNIV_NONINL
#include "ut0timer.ic"
#endif
#endif
|
