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.
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.
The behavior is undefined if the value specified by the attr argument
to pthread_condattr_getclock() or pthread_condattr_setclock() does
not refer to an initialized condition variable attributes object.
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
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.
If an implementation detects that the value specified by the attr
argument to pthread_condattr_getclock() or
pthread_condattr_setclock() does not refer to an initialized
condition variable attributes object, it is recommended that the
function should fail and report an [EINVAL] error.
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) 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.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the
source files to man page format. To report such errors, see
IEEE/The Open Group 2013 PTHREAD_CONDATTR_GETCLOCK(3P)