pthread_attr_init(3C)													     pthread_attr_init(3C)

NAME

       pthread_attr_init, pthread_attr_destroy - initialize or destroy threads attribute object

SYNOPSIS

       cc -mt [ flag... ] file... -lpthread [ library... ]
       #include <pthread.h>

       int pthread_attr_init(pthread_attr_t *attr);

       int pthread_attr_destroy(pthread_attr_t *attr);

       The  function  pthread_attr_init()  initializes a thread attributes object attr with the default value for all of the individual attributes
       used by a given implementation.

       The resulting attribute object (possibly modified by setting individual attribute values),  when  used  by  pthread_create(),  defines  the
       attributes of the thread created. A single attributes object can be used in multiple simultaneous calls to pthread_create().

       The pthread_attr_init() function initializes a thread attributes object ( attr) with the default value for each attribute as follows:

	  Attribute	      Default Value		   Meaning of Default
       contentionscope	 PTHREAD_SCOPE_PROCESS	   resource competition within process
       detachstate	 PTHREAD_CREATE_JOINABLE   joinable by other threads
       stackaddr	 NULL			   stack allocated by system
       stacksize	 NULL			   1 or 2 megabyte
       priority 	 0			   priority of the thread
       policy		 SCHED_OTHER		   determined by system
       inheritsched	 PTHREAD_EXPLICIT_SCHED    scheduling  policy  and  parameters
						   not	 inherited   but    explicitly
						   defined by the attribute object
       guardsize	 PAGESIZE		   size  of  guard area for a thread's
						   created stack

       The pthread_attr_destroy() function destroys a thread attributes object ( attr), which cannot be  reused  until	it  is	reinitialized.	An
       implementation  may  cause  pthread_attr_destroy()  to  set  attr  to  an implementation-dependent invalid value. The behavior of using the
       attribute after it has been destroyed is undefined.

       Upon successful completion, pthread_attr_init() and pthread_attr_destroy() return a value of  0. Otherwise, an error number is returned	to
       indicate the error.

       The  pthread_attr_init() function will fail if:

       ENOMEM	       Insufficient memory exists to initialize the thread attributes object.

       The  pthread_attr_destroy() function may fail if:

       EINVAL	       attr is invalid.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

       sysconf(3C),   pthread_attr_getdetachstate(3C),	 pthread_attr_getguardsize(3C),  pthread_attr_getinheritsched(3C),  pthread_attr_getsched-
       param(3C),  pthread_attr_getschedpolicy(3C),   pthread_attr_getscope(3C),   pthread_attr_getstackaddr(3C),   pthread_attr_getstacksize(3C),
       pthread_attr_setdetachstate(3C),     pthread_attr_setguardsize(3C),    pthread_attr_setinheritsched(3C),    pthread_attr_setschedparam(3C),
       pthread_attr_setschedpolicy(3C),  pthread_attr_setscope(3C),  pthread_attr_setstackaddr(3C),  pthread_attr_setstacksize(3C),   pthread_cre-
       ate(3C), attributes(5), standards(5)

								    23 Mar 2005 					     pthread_attr_init(3C)