pthread_condattr_init (3p) - Linux Man Pages
pthread_condattr_init: destroy and initialize
PROLOGThis manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
pthread_condattr_destroy, pthread_condattr_init - destroy and initialize the condition variable attributes object
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 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 variables.
This volume of IEEE Std 1003.1-2001 requires two attributes, the clock attribute and the process-shared attribute.
The pthread_condattr_destroy() function may fail if:
The value specified by attr is invalid.
The pthread_condattr_init() function shall fail if:
Insufficient memory exists to initialize the condition variable attributes
These functions shall not return an error code of [EINTR].
See pthread_attr_init() and pthread_mutex_init().
COPYRIGHTPortions 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 .