PTHREAD_ATTR_GETINHERITSCHED(3C) Standard C Library Functions

NAME

pthread_attr_getinheritsched, pthread_attr_setinheritsched - get or
set inheritsched attribute

SYNOPSIS

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

int pthread_attr_getinheritsched(const pthread_attr_t *restrict attr,
int *restrict inheritsched);


int pthread_attr_setinheritsched(pthread_attr_t *attr, int inheritsched);

DESCRIPTION

The functions pthread_attr_setinheritsched() and
pthread_attr_getinheritsched(), respectively, set and get the
inheritsched attribute in the attr argument.


When the attribute objects are used by pthread_create(), the
inheritsched attribute determines how the other scheduling attributes
of the created thread are to be set:

PTHREAD_INHERIT_SCHED
Specifies that the scheduling policy and
associated attributes are to be inherited
from the creating thread, and the
scheduling attributes in this attr
argument are to be ignored.


PTHREAD_EXPLICIT_SCHED
Specifies that the scheduling policy and
associated attributes are to be set to the
corresponding values from this attribute
object.


The symbols PTHREAD_INHERIT_SCHED and PTHREAD_EXPLICIT_SCHED are
defined in the header <pthread.h>.

RETURN VALUES

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

ERRORS

The pthread_attr_setinheritsched() or pthread_attr_getinheritsched()
functions may fail if:

EINVAL
attr or inheritsched 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_getschedparam(3C), pthread_attr_init(3C),
pthread_attr_setschedpolicy(3C), pthread_attr_setscope(3C),
pthread_create(3C), pthread_setschedparam(3C), attributes(7),
standards(7)

March 23, 2005
PTHREAD_ATTR_GETINHERITSCHED(3C)