PTHREAD_ATTR_GETSCOPE(3C) Standard C Library Functions

NAME

pthread_attr_getscope, pthread_attr_setscope - get or set
contentionscope attribute

SYNOPSIS

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

int pthread_attr_getscope(const pthread_attr_t *restrict attr,
int *restrict contentionscope);


int pthread_attr_setscope(pthread_attr_t *attr, int contentionscope);

DESCRIPTION

The pthread_attr_setscope() and pthread_attr_getscope() functions are
used to set and get the contentionscope attribute in the attr object.


The contentionscope attribute can have the value
PTHREAD_SCOPE_SYSTEM, signifying system scheduling contention scope,
or PTHREAD_SCOPE_PROCESS, signifying process scheduling contention
scope.


The symbols PTHREAD_SCOPE_SYSTEM and PTHREAD_SCOPE_PROCESS are
defined by the header <pthread.h>.

RETURN VALUES

If successful, the pthread_attr_setscope() and
pthread_attr_getscope() functions return 0. Otherwise, an error
number is returned to indicate the error.

ERRORS

The pthread_attr_setscope(), or pthread_attr_getscope(), function may
fail if:

EINVAL
attr or contentionscope is invalid.

USAGE

After these attributes have been set, a thread can be created with
the specified attributes using pthread_create(). Using these routines
does not affect the current running thread.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


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

SEE ALSO

pthread_attr_init(3C), pthread_attr_setinheritsched(3C),
pthread_attr_setschedparam(3C), pthread_attr_setschedpolicy(3C),
pthread_create(3C), pthread_setschedparam(3C), attributes(7),
standards(7)

March 23, 2005 PTHREAD_ATTR_GETSCOPE(3C)