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PTHREAD_CONDATTR_DESTROY(3P)SIX Programmer's ManualREAD_CONDATTR_DESTROY(3P)
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.
pthread_condattr_destroy, pthread_condattr_init — destroy and
initialize the condition variable attributes object
#include <pthread.h>
int pthread_condattr_destroy(pthread_condattr_t *attr);
int pthread_condattr_init(pthread_condattr_t *attr);
The pthread_condattr_destroy() function shall destroy a condition
variable attributes object; the object becomes, in effect,
uninitialized. An implementation may cause pthread_condattr_destroy()
to set the object referenced by attr to an invalid value. A destroyed
attr attributes object can be reinitialized using
pthread_condattr_init(); the results of otherwise referencing the
object after it has been destroyed are undefined.
The pthread_condattr_init() function shall initialize a condition
variable attributes object attr with the default value for all of the
attributes defined by the implementation.
Results are undefined if pthread_condattr_init() is called specifying
an already initialized attr attributes object.
After a condition variable attributes object has been used to
initialize one or more condition variables, any function affecting
the attributes object (including destruction) shall not affect any
previously initialized condition variables.
This volume of POSIX.1‐2008 requires two attributes, the clock
attribute and the process-shared attribute.
Additional attributes, their default values, and the names of the
associated functions to get and set those attribute values are
implementation-defined.
The behavior is undefined if the value specified by the attr argument
to pthread_condattr_destroy() does not refer to an initialized
condition variable attributes object.
If successful, the pthread_condattr_destroy() and
pthread_condattr_init() functions shall return zero; otherwise, an
error number shall be returned to indicate the error.
The pthread_condattr_init() function shall fail if:
ENOMEM Insufficient memory exists to initialize the condition
variable attributes object.
These functions shall not return an error code of [EINTR].
The following sections are informative.
None.
None.
A process-shared attribute has been defined for condition variables
for the same reason it has been defined for mutexes.
If an implementation detects that the value specified by the attr
argument to pthread_condattr_destroy() does not refer to an
initialized condition variable attributes object, it is recommended
that the function should fail and report an [EINVAL] error.
See also pthread_attr_destroy(3p) and pthread_mutex_destroy(3p).
None.
pthread_attr_destroy(3p), pthread_cond_destroy(3p),
pthread_condattr_getpshared(3p), pthread_create(3p),
pthread_mutex_destroy(3p)
The Base Definitions volume of POSIX.1‐2008, pthread.h(0p)
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
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 PTHREAD_CONDATTR_DESTROY(3P)
Pages that refer to this page: pthread.h(0p), pthread_condattr_getclock(3p), pthread_condattr_getpshared(3p), pthread_condattr_init(3p)