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PTHREAD_CONDATTR_GETCLOCK
Section: POSIX Programmer's Manual (3P)
Updated: 2003
Index
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PROLOG
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
NAME
pthread_condattr_getclock, pthread_condattr_setclock - get and set
the clock selection condition variable attribute
(ADVANCED REALTIME)
SYNOPSIS
#include <pthread.h>
int pthread_condattr_getclock(const pthread_condattr_t *restrict
attr,
clockid_t *restrict clock_id);
int pthread_condattr_setclock(pthread_condattr_t *attr,
clockid_t clock_id);
DESCRIPTION
The pthread_condattr_getclock() function shall obtain the value
of the clock attribute from the attributes object
referenced by attr. The pthread_condattr_setclock() function
shall set the clock attribute in an initialized
attributes object referenced by attr. If pthread_condattr_setclock()
is called with a clock_id argument that
refers to a CPU-time clock, the call shall fail.
The clock attribute is the clock ID of the clock that shall
be used to measure the timeout service of pthread_cond_timedwait().
The default value of the clock attribute
shall refer to the system clock.
RETURN VALUE
If successful, the pthread_condattr_getclock() function shall
return zero and store the value of the clock attribute of
attr into the object referenced by the clock_id argument.
Otherwise, an error number shall be returned to indicate
the error.
If successful, the pthread_condattr_setclock() function shall
return zero; otherwise, an error number shall be returned
to indicate the error.
ERRORS
These functions may fail if:
- EINVAL
-
The value specified by attr is invalid.
The pthread_condattr_setclock() function may fail if:
- EINVAL
-
The value specified by clock_id does not refer to a known clock,
or is a CPU-time clock.
These functions shall not return an error code of [EINTR].
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
pthread_cond_destroy(), pthread_cond_timedwait(), pthread_condattr_destroy(),
pthread_condattr_getpshared(), pthread_condattr_init(),
pthread_condattr_setpshared(), pthread_create(),
pthread_mutex_init(), the Base
Definitions volume of IEEE Std 1003.1-2001, <pthread.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .
Index
- PROLOG
-
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- EXAMPLES
-
- APPLICATION USAGE
-
- RATIONALE
-
- FUTURE DIRECTIONS
-
- SEE ALSO
-
- COPYRIGHT
-
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