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
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
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.
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