pthread_setschedparam man page on FreeBSD

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PTHREAD_SCHEDPARAM(3)	 BSD Library Functions Manual	 PTHREAD_SCHEDPARAM(3)

NAME
     pthread_setschedparam, pthread_getschedparam — thread scheduling parame‐
     ter manipulation

LIBRARY
     POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS
     #include <pthread.h>

     int
     pthread_setschedparam(pthread_t thread, int policy,
	 const struct sched_param *param);

     int
     pthread_getschedparam(pthread_t thread, int *policy,
	 struct sched_param *param);

DESCRIPTION
     The pthread_setschedparam() and pthread_getschedparam() functions set and
     get the scheduling parameters of individual threads.  The scheduling pol‐
     icy for a thread can either be SCHED_FIFO (first in, first out), SCHED_RR
     (round-robin), or SCHED_OTHER (timesharing).  Valid thread priorities
     (accessed via param->sched_priority) must be within the range returned by
     the sched_get_priority_min(2) and sched_get_priority_max(2) system calls.

RETURN VALUES
     If successful, these functions return 0.  Otherwise, an error number is
     returned to indicate the error.

ERRORS
     The pthread_setschedparam() function will fail if:

     [EINVAL]		Invalid value for policy.

     [ENOTSUP]		Invalid value for scheduling parameters.

     [ESRCH]		Non-existent thread thread.

     The pthread_getschedparam() function will fail if:

     [ESRCH]		Non-existent thread thread.

SEE ALSO
     sched_get_priority_max(2), sched_get_priority_min(2)

STANDARDS
     The pthread_setschedparam() and pthread_getschedparam() functions conform
     to Version 2 of the Single UNIX Specification (“SUSv2”).

BSD			       October 16, 2006				   BSD
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