2008-11-06 19:15:45 +00:00
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.\" Copyright (c) 2008 Linux Foundation, written by Michael Kerrisk
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.\" <mtk.manpages@gmail.com>
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\"
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.TH PTHREAD_SETSCHEDPRIO 3 2008-11-06 "Linux" "Linux Programmer's Manual"
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.SH NAME
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pthread_setschedprio \- set scheduling priority of a thread
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.SH SYNOPSIS
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.nf
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.B #include <pthread.h>
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.BI "pthread_setschedprio(pthread_t " thread ", int " prio );
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.sp
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Compile and link with \fI\-pthread\fP.
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.SH DESCRIPTION
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The
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.BR pthread_setschedprio ()
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function sets the scheduling priority of the thread
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.I thread
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to the value specified in
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.IR prio .
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(By contrast
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.BR pthread_setschedparam (3)
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changes both the scheduling policy and priority of a thread.)
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.\" FIXME . nptl/pthread_setschedprio.c has the following
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.\" /* If the thread should have higher priority because of some
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.\" PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */
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.\" Eventually (perhaps after writing the mutexattr pages), we
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.\" may want to add something on the topic to this page.
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.\" nptl/pthread_setschedparam.c has a similar case.
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.SH RETURN VALUE
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On success, this function returns 0;
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intro.1, time.1, adjtimex.2, capget.2, eventfd.2, fcntl.2, getrlimit.2, getsockopt.2, gettimeofday.2, intro.2, ioctl_list.2, ioperm.2, mlock.2, pivot_root.2, poll.2, prctl.2, ptrace.2, sched_setscheduler.2, select_tut.2, semget.2, sigaltstack.2, signalfd.2, sysctl.2, timer_settime.2, timerfd_create.2, wait.2, CPU_SET.3, argz_add.3, assert_perror.3, atexit.3, backtrace.3, bcmp.3, clearenv.3, ctime.3, dl_iterate_phdr.3, dlopen.3, ecvt.3, errno.3, error.3, ether_aton.3, exit.3, fenv.3, ferror.3, finite.3, flockfile.3, fnmatch.3, fpathconf.3, fpclassify.3, ftime.3, ftok.3, ftw.3, fwide.3, getaddrinfo.3, gethostbyname.3, getlogin.3, getnameinfo.3, getnetent.3, getopt.3, getprotoent.3, getrpcent.3, getservent.3, glob.3, hsearch.3, inet.3, isalpha.3, iswalnum.3, iswalpha.3, iswblank.3, iswcntrl.3, iswctype.3, iswdigit.3, iswgraph.3, iswlower.3, iswprint.3, iswpunct.3, iswspace.3, iswupper.3, iswxdigit.3, longjmp.3, lsearch.3, malloc.3, matherr.3, mblen.3, mbsinit.3, mbtowc.3, on_exit.3, printf.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_equal.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedparam.3, pthread_setschedprio.3, ptsname.3, putenv.3, putgrent.3, raise.3, rcmd.3, regex.3, rexec.3, rpc.3, rpmatch.3, rtnetlink.3, scandir.3, sem_init.3, setaliasent.3, setbuf.3, setenv.3, setjmp.3, signbit.3, stdio_ext.3, strtod.3, strtol.3, strtoul.3, system.3, termios.3, timeradd.3, tzset.3, ualarm.3, wctomb.3, xdr.3, st.4, tty_ioctl.4, core.5, elf.5, proc.5, bootparam.7, capabilities.7, icmp.7, ip.7, ipv6.7, math_error.7, mdoc.samples.7, mq_overview.7, pthreads.7, raw.7, regex.7, socket.7, tcp.7, tzselect.8: Global fix: s/non-zero/nonzero/
The tendency in English, as prescribed in style guides like
Chicago MoS, is towards removing hyphens after prefixes
like "non-" etc.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-01-16 16:40:55 +00:00
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on error, it returns a nonzero error number.
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2008-11-06 19:15:45 +00:00
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If
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.BR pthread_setschedprio ()
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fails, the scheduling priority of
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.I thread
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is not changed.
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.SH ERRORS
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.TP
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.B EINVAL
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.I prio
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is not valid for the scheduling policy of the specified thread.
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.TP
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.B EPERM
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The caller does not have appropriate privileges
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to set the specified priority.
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.TP
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.B ESRCH
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No thread with the ID
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.I thread
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could be found.
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.PP
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POSIX.1-2001 also documents an
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.B ENOTSUP
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("attempt was made to set the priority
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to an unsupported value") error for
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Changes, clone.2, mount.2, nanosleep.2, sigaltstack.2, statfs.2, timer_settime.2, ctime.3, fmemopen.3, nl_langinfo.3, posix_memalign.3, pthread_attr_init.3, pthread_setaffinity_np.3, pthread_setschedprio.3, pthread_testcancel.3, setjmp.3, sigwait.3, tty_ioctl.4, epoll.7, posixoptions.7, unix.7: Add section number to references to functions documented in other pages
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-11-01 07:07:28 +00:00
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.BR pthread_setschedparam (3).
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2008-11-06 19:15:45 +00:00
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.SH VERSIONS
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This function is available in glibc since version 2.3.4.
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.SH CONFORMING TO
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POSIX.1-2001.
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.SH NOTES
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For a description of the permissions required to, and the effect of,
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changing a thread's scheduling priority,
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and details of the permitted ranges for priorities
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in each scheduling policy, see
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.BR sched_setscheduler (2).
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.SH SEE ALSO
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.BR getrlimit (2),
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.BR sched_get_priority_min (2),
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.BR sched_setscheduler (2),
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.BR pthread_attr_init (3),
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.BR pthread_attr_setinheritsched (3),
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.BR pthread_attr_setschedparam (3),
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.BR pthread_attr_setschedpolicy (3),
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.BR pthread_create (3),
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.BR pthread_self (3),
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clock_nanosleep.2, getpriority.2, kexec_load.2, nanosleep.2, nice.2, sched_setaffinity.2, timer_create.2, timer_delete.2, timer_settime.2, utime.2, btowc.3, futimes.3, log.3, pthread_attr_setguardsize.3, pthread_kill_other_threads_np.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setschedparam.3, pthread_setschedprio.3, pthread_tryjoin_np.3, strcoll.3, strcpy.3, string.3, strxfrm.3, networks.5, aio.7, sigevent.7, udplite.7: SEE ALSO: Place entries in correct order
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-11-01 05:34:26 +00:00
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.BR pthread_setschedparam (3),
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2008-11-06 19:15:45 +00:00
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.BR pthreads (7)
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