mirror of https://github.com/mkerrisk/man-pages
96 lines
3.2 KiB
Plaintext
96 lines
3.2 KiB
Plaintext
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.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "PTHREAD_CONDATTR_GETCLOCK" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" pthread_condattr_getclock
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.SH NAME
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pthread_condattr_getclock, pthread_condattr_setclock \- get and set
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the clock selection condition variable attribute
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(\fBADVANCED REALTIME\fP)
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.SH SYNOPSIS
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.LP
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\fB#include <pthread.h>
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.br
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.sp
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int pthread_condattr_getclock(const pthread_condattr_t *restrict\fP
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\fIattr\fP\fB,
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.br
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\ \ \ \ \ \ clockid_t *restrict\fP \fIclock_id\fP\fB);
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.br
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int pthread_condattr_setclock(pthread_condattr_t *\fP\fIattr\fP\fB,
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.br
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\ \ \ \ \ \ clockid_t\fP \fIclock_id\fP\fB); \fP
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\fB
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIpthread_condattr_getclock\fP() function shall obtain the value
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of the \fIclock\fP attribute from the attributes object
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referenced by \fIattr\fP. The \fIpthread_condattr_setclock\fP() function
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shall set the \fIclock\fP attribute in an initialized
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attributes object referenced by \fIattr\fP. If \fIpthread_condattr_setclock\fP()
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is called with a \fIclock_id\fP argument that
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refers to a CPU-time clock, the call shall fail.
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.LP
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The \fIclock\fP attribute is the clock ID of the clock that shall
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be used to measure the timeout service of \fIpthread_cond_timedwait\fP().
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The default value of the \fIclock\fP attribute
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shall refer to the system clock.
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.SH RETURN VALUE
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.LP
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If successful, the \fIpthread_condattr_getclock\fP() function shall
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return zero and store the value of the clock attribute of
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\fIattr\fP into the object referenced by the \fIclock_id\fP argument.
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Otherwise, an error number shall be returned to indicate
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the error.
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.LP
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If successful, the \fIpthread_condattr_setclock\fP() function shall
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return zero; otherwise, an error number shall be returned
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to indicate the error.
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.SH ERRORS
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.LP
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These functions may fail if:
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.TP 7
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.B EINVAL
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The value specified by \fIattr\fP is invalid.
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.sp
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.LP
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The \fIpthread_condattr_setclock\fP() function may fail if:
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.TP 7
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.B EINVAL
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The value specified by \fIclock_id\fP does not refer to a known clock,
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or is a CPU-time clock.
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.sp
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.LP
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These functions shall not return an error code of [EINTR].
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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None.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fIpthread_cond_destroy\fP() , \fIpthread_cond_timedwait\fP() , \fIpthread_condattr_destroy\fP()
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, \fIpthread_condattr_getpshared\fP() ,1 \fIpthread_condattr_init\fP()
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, \fIpthread_condattr_setpshared\fP() ,1 \fIpthread_create\fP() ,
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\fIpthread_mutex_init\fP() , the Base
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Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<pthread.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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