PTHREAD_CONDATTR_DESTROY(P) POSIX Programmer's Manual PTHREAD_CONDATTR_DESTROY(P)
pthread_condattr_destroy, pthread_condattr_init - destroy and initialize the condition
variable attributes object
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 implementa-
Results are undefined if pthread_condattr_init() is called specifying an already initial-
ized attr attributes object.
After a condition variable attributes object has been used to initialize one or more con-
dition variables, any function affecting the attributes object (including destruction)
shall not affect any previously initialized condition variables.
This volume of IEEE Std 1003.1-2001 requires two attributes, the clock attribute and the
Additional attributes, their default values, and the names of the associated functions to
get and set those attribute values are implementation-defined.
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_destroy() function may fail if:
EINVAL The value specified by attr is invalid.
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.
See pthread_attr_init() and pthread_mutex_init() .
A process-shared attribute has been defined for condition variables for the same reason it
has been defined for mutexes.
pthread_attr_destroy() , pthread_cond_destroy() , pthread_condattr_getpshared() ,
pthread_create() , pthread_mutex_destroy() , the Base Definitions volume of
IEEE Std 1003.1-2001, <pthread.h>
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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 PTHREAD_CONDATTR_DESTROY(P)