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PTHREAD_CONDATTR_DESTROY(P)	    POSIX Programmer's Manual	      PTHREAD_CONDATTR_DESTROY(P)

NAME
       pthread_condattr_destroy,  pthread_condattr_init  -  destroy  and initialize the condition
       variable attributes object

SYNOPSIS
       #include <pthread.h>

       int pthread_condattr_destroy(pthread_condattr_t *attr);
       int pthread_condattr_init(pthread_condattr_t *attr);

DESCRIPTION
       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-
       tion.

       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
       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.

RETURN VALUE
       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.

ERRORS
       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.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       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.

FUTURE DIRECTIONS
       None.

SEE ALSO
       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>

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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003		      PTHREAD_CONDATTR_DESTROY(P)
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