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pthread_schedparam(3)

NAME

     pthread_setschedparam, pthread_getschedparam -- thread scheduling parame-
     ter manipulation

LIBRARY

     Reentrant C Library (libc_r, -lc_r)
     POSIX Threads Library (libpthread, -lpthread)
     1:1 Threading Library (libthr, -lthr)

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) or
     SCHED_RR (round-robin).  The thread priority (accessed via
     param->sched_priority) must be at least PTHREAD_MIN_PRIORITY and no more
     than PTHREAD_MAX_PRIORITY.

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.

STANDARDS

     The pthread_setschedparam() and pthread_getschedparam() functions conform
     to Version 2 of the Single UNIX Specification (``SUSv2'')

FreeBSD 5.4			  May 1, 2000			   FreeBSD 5.4

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