blob: e5ec4115434a011bf94877d96653c72d48efe194 (
plain) (
blame)
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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/**
* @file
*
* @brief Get Process Times
* @ingroup libcsupport
*/
/*
* COPYRIGHT (c) 1989-2013.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
/*
* Needed to get the prototype for this newlib helper method
*/
#define _COMPILING_NEWLIB
#include <rtems.h>
#include <sys/times.h>
#include <time.h>
#include <sys/time.h>
#include <errno.h>
#include <rtems/seterr.h>
#include <rtems/score/todimpl.h>
#include <rtems/score/timestamp.h>
#include <rtems/score/threadimpl.h>
/**
* POSIX 1003.1b 4.5.2 - Get Process Times
*/
clock_t _times(
struct tms *ptms
)
{
rtems_interval ticks, us_per_tick;
Thread_Control *executing;
if ( !ptms )
rtems_set_errno_and_return_minus_one( EFAULT );
/*
* This call does not depend on TOD being initialized and can't fail.
*/
ticks = rtems_clock_get_ticks_since_boot();
us_per_tick = rtems_configuration_get_microseconds_per_tick();
/*
* RTEMS technically has no notion of system versus user time
* since there is no separation of OS from application tasks.
* But we can at least make a distinction between the number
* of ticks since boot and the number of ticks executed by this
* this thread.
*/
{
Timestamp_Control per_tick;
uint32_t ticks_of_executing;
uint32_t fractional_ticks;
Per_CPU_Control *cpu_self;
_Timestamp_Set(
&per_tick,
rtems_configuration_get_microseconds_per_tick() /
TOD_MICROSECONDS_PER_SECOND,
(rtems_configuration_get_nanoseconds_per_tick() %
TOD_NANOSECONDS_PER_SECOND)
);
cpu_self = _Thread_Dispatch_disable();
executing = _Thread_Executing;
_Thread_Update_cpu_time_used(
executing,
&_Thread_Time_of_last_context_switch
);
_Timestamp_Divide(
&executing->cpu_time_used,
&per_tick,
&ticks_of_executing,
&fractional_ticks
);
_Thread_Dispatch_enable( cpu_self );
ptms->tms_utime = ticks_of_executing * us_per_tick;
}
ptms->tms_stime = ticks * us_per_tick;
ptms->tms_cutime = 0;
ptms->tms_cstime = 0;
return ticks * us_per_tick;
}
/**
* times() system call wrapper for _times() above.
*/
clock_t times(
struct tms *ptms
)
{
return _times( ptms );
}
#if defined(RTEMS_NEWLIB)
#include <reent.h>
/**
* This is the Newlib dependent reentrant version of times().
*/
clock_t _times_r(
struct _reent *ptr __attribute__((unused)),
struct tms *ptms
)
{
return _times( ptms );
}
#endif
|
