pthread_setschedprio - set scheduling priority of a thread
#include <pthread.h>
int pthread_setschedprio(pthread_t thread, int prio);
Compile and link with -pthread.
The
pthread_setschedprio() function sets the scheduling priority of the
thread
thread to the value specified in
prio. (By contrast
pthread_setschedparam(3) changes both the scheduling policy and
priority of a thread.)
On success, this function returns 0; on error, it returns a nonzero error
number. If
pthread_setschedprio() fails, the scheduling priority of
thread is not changed.
- EINVAL
- prio is not valid for the scheduling policy of the specified
thread.
- EPERM
- The caller does not have appropriate privileges to set the specified
priority.
- ESRCH
- No thread with the ID thread could be found.
POSIX.1 also documents an
ENOTSUP ("attempt was made to set the
priority to an unsupported value") error for
pthread_setschedparam(3).
This function is available in glibc since version 2.3.4.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| pthread_setschedprio () |
Thread safety |
MT-Safe |
POSIX.1-2001, POSIX.1-2008.
For a description of the permissions required to, and the effect of, changing a
thread's scheduling priority, and details of the permitted ranges for
priorities in each scheduling policy, see
sched(7).
getrlimit(2),
sched_get_priority_min(2),
pthread_attr_init(3),
pthread_attr_setinheritsched(3),
pthread_attr_setschedparam(3),
pthread_attr_setschedpolicy(3),
pthread_create(3),
pthread_self(3),
pthread_setschedparam(3),
pthreads(7),
sched(7)