1 | /***************************************************************************** |
2 | |
3 | Copyright (c) 2013, 2014, Facebook, Inc. All Rights Reserved. |
4 | Copyright (c) 2014, SkySQL Ab. All Rights Reserved. |
5 | |
6 | This program is free software; you can redistribute it and/or modify it under |
7 | the terms of the GNU General Public License as published by the Free Software |
8 | Foundation; version 2 of the License. |
9 | |
10 | This program is distributed in the hope that it will be useful, but WITHOUT |
11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
12 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU General Public License along with |
15 | this program; if not, write to the Free Software Foundation, Inc., |
16 | 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA |
17 | |
18 | *****************************************************************************/ |
19 | |
20 | /********************************************************************//** |
21 | @file include/ut0timer.ic |
22 | Timer rountines |
23 | |
24 | Created 30/07/2014 Jan Lindström jan.lindstrom@skysql.com |
25 | modified from https://github.com/facebook/mysql-5.6/commit/c75a413edeb96eb99bf11d7269bdfea06f96d6b6 |
26 | *************************************************************************/ |
27 | |
28 | /**************************************************************//** |
29 | Return time passed since time then, automatically adjusted |
30 | for the estimated timer overhead. |
31 | @return time passed since "then" */ |
32 | UNIV_INLINE |
33 | ulonglong |
34 | ut_timer_since( |
35 | /*===========*/ |
36 | ulonglong then) /*!< in: time where to calculate */ |
37 | { |
38 | return (ut_timer_now() - then) - ut_timer.overhead; |
39 | } |
40 | |
41 | /**************************************************************//** |
42 | Get time passed since "then", and update then to now |
43 | @return time passed sinche "then" */ |
44 | UNIV_INLINE |
45 | ulonglong |
46 | ut_timer_since_and_update( |
47 | /*======================*/ |
48 | ulonglong *then) /*!< in: time where to calculate */ |
49 | { |
50 | ulonglong now = ut_timer_now(); |
51 | ulonglong ret = (now - (*then)) - ut_timer.overhead; |
52 | *then = now; |
53 | return ret; |
54 | } |
55 | |
56 | /**************************************************************//** |
57 | Convert native timer units in a ulonglong into seconds in a double |
58 | @return time in a seconds */ |
59 | UNIV_INLINE |
60 | double |
61 | ut_timer_to_seconds( |
62 | /*=================*/ |
63 | ulonglong when) /*!< in: time where to calculate */ |
64 | { |
65 | double ret = (double)(when); |
66 | ret /= (double)(ut_timer.frequency); |
67 | return ret; |
68 | } |
69 | |
70 | /**************************************************************//** |
71 | Convert native timer units in a ulonglong into milliseconds in a double |
72 | @return time in milliseconds */ |
73 | UNIV_INLINE |
74 | double |
75 | ut_timer_to_milliseconds( |
76 | /*=====================*/ |
77 | ulonglong when) /*!< in: time where to calculate */ |
78 | { |
79 | double ret = (double)(when); |
80 | ret *= 1000.0; |
81 | ret /= (double)(ut_timer.frequency); |
82 | return ret; |
83 | } |
84 | |
85 | /**************************************************************//** |
86 | Convert native timer units in a ulonglong into microseconds in a double |
87 | @return time in microseconds */ |
88 | UNIV_INLINE |
89 | double |
90 | ut_timer_to_microseconds( |
91 | /*=====================*/ |
92 | ulonglong when) /*!< in: time where to calculate */ |
93 | { |
94 | double ret = (double)(when); |
95 | ret *= 1000000.0; |
96 | ret /= (double)(ut_timer.frequency); |
97 | return ret; |
98 | } |
99 | |
100 | /**************************************************************//** |
101 | Convert microseconds in a double to native timer units in a ulonglong |
102 | @return time in microseconds */ |
103 | UNIV_INLINE |
104 | ulonglong |
105 | ut_microseconds_to_timer( |
106 | /*=====================*/ |
107 | ulonglong when) /*!< in: time where to calculate */ |
108 | { |
109 | double ret = (double)when; |
110 | ret *= (double)(ut_timer.frequency); |
111 | ret /= 1000000.0; |
112 | return (ulonglong)ret; |
113 | } |
114 | |