mirror of
https://github.com/MariaDB/server.git
synced 2025-01-31 11:01:52 +01:00
67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/*****************************************************************************
|
|
|
|
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 */
|
|
|
|
#include "ut0timer.ic"
|
|
|
|
#endif
|