PTHREAD_ATTR_GETSCHEDPARAM(3) Library Functions Manual PTHREAD_ATTR_GETSCHEDPARAM(3)
NAME
pthread_attr_getschedparamget and set scheduling attributes
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread.h>
int
pthread_attr_getschedparam(const pthread_attr_t * restrict attr, struct sched_param * restrict param);
int
pthread_attr_setschedparam(pthread_attr_t *attr, const struct sched_param *param);
int
pthread_attr_getschedpolicy(const pthread_attr_t * restrict attr, int * restrict policy);
int
pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);
DESCRIPTION
The pthread_attr_getschedparam() and pthread_attr_setschedparam() functions obtain and set the scheduling parameter attribute in the attr object. The sched_param structure is defined in <sched.h>. At minimum this structure contains only a single member, sched_priority. Refer to pthread_schedparam(3) and sched(3) for additional details.
 
The pthread_attr_getschedpolicy() and pthread_attr_setschedpolicy() functions get and set the scheduling policy attribute, policy, in the attr object. The supported values of policy are the same ones listed in pthread_schedparam(3).
RETURN VALUES
If successful, all described functions return 0. Otherwise, an error number is returned to indicate the error.
ERRORS
The pthread_attr_getschedparam() function may fail if:
[EINVAL]
An invalid parameter was specified.
 
The pthread_attr_setschedparam() function may fail if:
[EINVAL]
An invalid parameter was specified.
[ENOMEM]
There was insufficient memory.
 
The pthread_attr_setschedpolicy() function may fail if:
[ENOMEM]
There was insufficient memory.
[ENOTSUP]
An unsupported policy was specified.
 
No errors are defined for pthread_attr_getschedpolicy().
SEE ALSO
STANDARDS
These functions conform to IEEE Std 1003.1-2008 (“POSIX.1”).