pthread_setschedprio - set scheduling priority of a thread

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ pthread_setschedprio()                                                      │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       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.)

EINVALprio 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).

       glibc 2.3.4.  POSIX.1-2001.

       POSIX threads library (libpthread, -lpthread)

       pthread_setschedprio - set scheduling priority of a thread

       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).

       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.

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)

Linux man-pages 6.9.1                              2024-05-02                            pthread_setschedprio(3)

       POSIX.1-2008.

#include<pthread.h>intpthread_setschedprio(pthread_tthread,intprio);