pthread_condattr_destroy

       ize 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 vari-
       able  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 vari-
       able  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 initial-
       ize one  or  more  condition  variables,  any  function  affecting  the
       attributes  object  (including destruction) shall not affect any previ-
       ously 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 asso-
       ciated functions to get and set those attribute values are  implementa-
       tion-defined.

RETURN VALUE
       If   successful,   the   pthread_condattr_destroy()   and  pthread_con-
       dattr_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.



       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_con-
       dattr_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 original Standard can be  obtained  online
       at http://www.opengroup.org/unix/online.html .



IEEE/The Open Group                  2003          PTHREAD_CONDATTR_DESTROY(P)