PTHREAD_CONDATTR_DESTROY(P)POSIX Programmer's ManuaPTHREAD_CONDATTR_DESTROY(P) NAME pthread_condattr_destroy, pthread_condattr_init - destroy and initial- ize the condition variable attributes object SYNOPSIS #include 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. 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_con- dattr_getpshared() , pthread_create() , pthread_mutex_destroy() , the Base Definitions volume of IEEE Std 1003.1-2001, 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)