.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved .TH "PTHREAD_CONDATTR_DESTROY" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" .\" pthread_condattr_destroy .SH NAME pthread_condattr_destroy, pthread_condattr_init \- destroy and initialize the condition variable attributes object .SH SYNOPSIS .LP \fB#include .br .sp int pthread_condattr_destroy(pthread_condattr_t *\fP\fIattr\fP\fB); .br int pthread_condattr_init(pthread_condattr_t *\fP\fIattr\fP\fB); \fP \fB .br \fP .SH DESCRIPTION .LP The \fIpthread_condattr_destroy\fP() function shall destroy a condition variable attributes object; the object becomes, in effect, uninitialized. An implementation may cause \fIpthread_condattr_destroy\fP() to set the object referenced by \fIattr\fP to an invalid value. A destroyed \fIattr\fP attributes object can be reinitialized using \fIpthread_condattr_init\fP(); the results of otherwise referencing the object after it has been destroyed are undefined. .LP The \fIpthread_condattr_init\fP() function shall initialize a condition variable attributes object \fIattr\fP with the default value for all of the attributes defined by the implementation. .LP Results are undefined if \fIpthread_condattr_init\fP() is called specifying an already initialized \fIattr\fP attributes object. .LP 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. .LP This volume of IEEE\ Std\ 1003.1-2001 requires two attributes, the \fIclock\fP attribute and the \fIprocess-shared\fP attribute. .LP Additional attributes, their default values, and the names of the associated functions to get and set those attribute values are implementation-defined. .SH RETURN VALUE .LP If successful, the \fIpthread_condattr_destroy\fP() and \fIpthread_condattr_init\fP() functions shall return zero; otherwise, an error number shall be returned to indicate the error. .SH ERRORS .LP The \fIpthread_condattr_destroy\fP() function may fail if: .TP 7 .B EINVAL The value specified by \fIattr\fP is invalid. .sp .LP The \fIpthread_condattr_init\fP() function shall fail if: .TP 7 .B ENOMEM Insufficient memory exists to initialize the condition variable attributes object. .sp .LP These functions shall not return an error code of [EINTR]. .LP \fIThe following sections are informative.\fP .SH EXAMPLES .LP None. .SH APPLICATION USAGE .LP None. .SH RATIONALE .LP See \fIpthread_attr_init\fP() and \fIpthread_mutex_init\fP() . .LP A \fIprocess-shared\fP attribute has been defined for condition variables for the same reason it has been defined for mutexes. .SH FUTURE DIRECTIONS .LP None. .SH SEE ALSO .LP \fIpthread_attr_destroy\fP() , \fIpthread_cond_destroy\fP() , \fIpthread_condattr_getpshared\fP() , \fIpthread_create\fP() , \fIpthread_mutex_destroy\fP() , the Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI\fP .SH 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 .