Sistemi operativi - Syscall pthread_attr_init

pthread_attr_init

The Single UNIX ® Specification, Version 2

Copyright © 1997 The Open Group

NAME

pthread_attr_init, pthread_attr_destroy - initialise and destroy threads attribute object

SYNOPSIS

#include <pthread.h>
int pthread_attr_init(pthread_attr_t *attr);
int pthread_attr_destroy(pthread_attr_t *attr);

DESCRIPTION

The function pthread_attr_init() initialises 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_destroy() function is used to destroy a thread attributes object. An implementation may cause pthread_attr_destroy() to set attr to an

implementation-dependentinvalid value. The behaviour of using the attribute after it has been destroyed is undefined.

RETURN VALUE

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.

ERRORS

The pthread_attr_init() function will fail if:

• [ENOMEM] Insufficient memory exists to initialise the thread attributes object.

These functions will not return an error code of [EINTR].

EXAMPLES

None.

APPLICATION USAGE

None.

FUTURE DIRECTIONS

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