pthread_setschedprio — set scheduling priority of a thread
Synopsis
#include <pthread.h> int pthread_setschedprio(pthread_t thread, int prio); Compile and link with -pthread.
Description
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.)
Return Value
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.
Errors
- 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).
Versions
This function is available in glibc since version 2.3.4.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
|---|---|---|
| pthread_setschedprio() | Thread safety | MT-Safe |
Conforming to
POSIX.1-2001, POSIX.1-2008.
Notes
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).
See Also
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)
Colophon
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Referenced By
pthread_attr_setinheritsched(3), pthread_attr_setschedparam(3), pthread_attr_setschedpolicy(3), pthread_setschedparam(3), sched(7), sched_setattr(2), sched_setscheduler(2).