NAME
pthread_attr_getinheritsched,
pthread_attr_setinheritsched —
get and set
“inheritsched” attribute
LIBRARY
library “libpthread”
SYNOPSIS
#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
Thepthread_attr_getinheritsched()
and
pthread_attr_setinheritsched()
functions get and set, respectively, the inherit scheduler attribute,
inheritsched, in the attr object.
The inheritsched parameter specifies whether a tread
created by using attr will obtain its scheduling
attributes directly from attr or whether it will inherit
these from the calling thread.
Two values are possible for inheritsched:
PTHREAD_INHERIT_SCHED- The thread scheduling attributes will be inherited from the creating thread and the ones in attr are ignored.
PTHREAD_EXPLICIT_SCHED- The thread scheduling attributes will be set to the corresponding values in attr.
The following thread scheduling attributes are affected by inheritsched:
- Scheduling policy; see pthread_attr_setschedpolicy(3).
- Scheduling parameter; see pthread_attr_getschedparam(3).
- Scheduling contention scope; see pthread_attr_getscope(3).
RETURN VALUES
If successful, both functions return 0. Otherwise, an error number is returned to indicate the error.
COMPATIBILITY
The standard leaves it unspecified which (if any) is the default inherit scheduler attribute in a newly initialized attribute object.
ERRORS
No errors are defined for
pthread_attr_getinheritsched().
The pthread_attr_setinheritsched()
function may fail if:
- [
EINVAL] - The value specified by inheritsched is invalid.
SEE ALSO
STANDARDS
Both functions conform to IEEE Std 1003.1-2008 (“POSIX.1”).