blob: 104997fcf8daf3482e611a84d57304c85c441e10 (
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
|
/**
* @file rtems/posix/time.h
*
* This defines the interface to implementation helper routines related
* to POSIX time types.
*/
/*
* COPYRIGHT (c) 1989-2011.
* 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.com/license/LICENSE.
*/
#ifndef _RTEMS_POSIX_TIME_H
#define _RTEMS_POSIX_TIME_H
#include <rtems/score/timespec.h>
#include <rtems/score/watchdog.h>
/**
* @brief Absolute Timeout Conversion Results
*
* This enumeration defines the possible results of converting
* an absolute time used for timeouts to POSIX blocking calls to
* a number of ticks.
*/
typedef enum {
/** The timeout is invalid. */
POSIX_ABSOLUTE_TIMEOUT_INVALID,
/** The timeout represents a time that is in the past. */
POSIX_ABSOLUTE_TIMEOUT_IS_IN_PAST,
/** The timeout represents a time that is equal to the current time. */
POSIX_ABSOLUTE_TIMEOUT_IS_NOW,
/** The timeout represents a time that is in the future. */
POSIX_ABSOLUTE_TIMEOUT_IS_IN_FUTURE,
} POSIX_Absolute_timeout_conversion_results_t;
/**
* @brief Convert Absolute Timeout to Ticks
*
* This method takes an absolute time being used as a timeout
* to a blocking directive, validates it and returns the number
* of corresponding clock ticks for use by the SuperCore.
*
* @param[in] abstime is the timeout
* @param[in] ticks_out will contain the number of ticks
*
* @return This method returns the number of ticks in @a ticks_out
* and a status value indicating whether the absolute time
* is valid, in the past, equal to the current time or in
* the future as it should be.
*/
POSIX_Absolute_timeout_conversion_results_t _POSIX_Absolute_timeout_to_ticks(
const struct timespec *abstime,
Watchdog_Interval *ticks_out
);
#endif
|
