2008-10-25 02:56:41 +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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intro.1, _exit.2, access.2, alarm.2, alloc_hugepages.2, arch_prctl.2, bind.2, chdir.2, chmod.2, chown.2, chroot.2, clock_getres.2, clock_nanosleep.2, close.2, connect.2, delete_module.2, dup.2, execve.2, exit_group.2, faccessat.2, fchmodat.2, fchownat.2, fcntl.2, fork.2, fstatat.2, fsync.2, futimesat.2, get_robust_list.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getpagesize.2, getpid.2, getresuid.2, getrlimit.2, getrusage.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, idle.2, init_module.2, intro.2, iopl.2, kcmp.2, kexec_load.2, kill.2, link.2, linkat.2, llseek.2, lookup_dcookie.2, madvise.2, mincore.2, mkdirat.2, mknodat.2, mmap.2, mmap2.2, mount.2, mprotect.2, mq_getsetattr.2, msgctl.2, msgget.2, msgop.2, msync.2, nice.2, open.2, openat.2, pause.2, perfmonctl.2, personality.2, pipe.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, quotactl.2, read.2, readahead.2, readdir.2, readlinkat.2, readv.2, reboot.2, recvmmsg.2, remap_file_pages.2, rename.2, renameat.2, rmdir.2, rt_sigqueueinfo.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, sendmmsg.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setresuid.2, setuid.2, setup.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, signal.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, splice.2, stat.2, statfs.2, stime.2, subpage_prot.2, swapon.2, symlink.2, symlinkat.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysfs.2, syslog.2, tee.2, time.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, times.2, tkill.2, umask.2, umount.2, uname.2, unlink.2, unlinkat.2, uselib.2, ustat.2, utime.2, utimensat.2, vfork.2, vhangup.2, vm86.2, vmsplice.2, wait.2, wait4.2, write.2, CPU_SET.3, INFINITY.3, abort.3, abs.3, acos.3, acosh.3, adjtime.3, aio_init.3, asin.3, asinh.3, asprintf.3, assert.3, assert_perror.3, atan.3, atan2.3, atanh.3, atexit.3, atof.3, atoi.3, basename.3, bcmp.3, bcopy.3, bindresvport.3, bsd_signal.3, bsearch.3, bstring.3, byteorder.3, bzero.3, catgets.3, catopen.3, cbrt.3, ceil.3, clearenv.3, clock.3, clock_getcpuclockid.3, closedir.3, confstr.3, copysign.3, cos.3, cosh.3, ctermid.3, ctime.3, difftime.3, dirfd.3, div.3, dl_iterate_phdr.3, dprintf.3, drand48.3, drand48_r.3, dysize.3, ecvt.3, ecvt_r.3, end.3, endian.3, erf.3, erfc.3, ether_aton.3, euidaccess.3, exit.3, exp.3, exp10.3, exp2.3, expm1.3, fabs.3, fcloseall.3, fexecve.3, ffs.3, fgetgrent.3, fgetpwent.3, finite.3, flockfile.3, floor.3, fmod.3, fnmatch.3, fopencookie.3, fpathconf.3, fpurge.3, frexp.3, fseeko.3, ftok.3, futimes.3, gcvt.3, get_nprocs_conf.3, getaddrinfo.3, getaddrinfo_a.3, getauxval.3, getcontext.3, getcwd.3, getdate.3, getdirentries.3, getdtablesize.3, getenv.3, getfsent.3, getgrent.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getifaddrs.3, getipnodebyname.3, getline.3, getlogin.3, getmntent.3, getnetent.3, getnetent_r.3, getopt.3, getprotoent.3, getprotoent_r.3, getpw.3, getpwent.3, getpwnam.3, getrpcent_r.3, gets.3, getservent.3, getservent_r.3, getumask.3, getusershell.3, getutmp.3, getw.3, glob.3, gnu_get_libc_version.3, gsignal.3, hypot.3, if_nameindex.3, if_nametoindex.3, ilogb.3, index.3, inet.3, inet_ntop.3, inet_pton.3, infnan.3, initgroups.3, insque.3, intro.3, isalpha.3, isatty.3, j0.3, ldexp.3, localeconv.3, log.3, log10.3, log1p.3, log2.3, logb.3, lrint.3, lround.3, lsearch.3, lseek64.3, makecontext.3, makedev.3, mallinfo.3, malloc.3, malloc_get_state.3, malloc_info.3, malloc_stats.3, malloc_trim.3, malloc_usable_size.3, mallopt.3, matherr.3, mcheck.3, memccpy.3, memchr.3, memcmp.3, memcpy.3, memfrob.3, memmem.3, memmove.3, memset.3, mkdtemp.3, mkfifo.3, mkfifoat.3, mkstemp.3, mktemp.3, modf.3, mq_close.3, mq_getattr.3, mq_notify.3, mq_open.3, mq_receive.3, mq_send.3, mq_unlink.3, mtrace.3, on_exit.3, opendir.3, posix_fallocate.3, posix_memalign.3, posix_openpt.3, pow.3, pow10.3, profil.3, psignal.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_cleanup_push_defer_np.3, pthread_create.3, pthread_detach.3, pthread_equal.3, pthread_exit.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_join.3, pthread_kill.3, pthread_kill_other_threads_np.3, pthread_self.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_setschedprio.3, pthread_sigmask.3, pthread_sigqueue.3, pthread_testcancel.3, pthread_tryjoin_np.3, pthread_yield.3, putenv.3, putpwent.3, puts.3, qecvt.3, qsort.3, raise.3, rand.3, random.3, random_r.3, re_comp.3, readdir.3, realpath.3, regex.3, remainder.3, remove.3, resolver.3, rewinddir.3, rint.3, round.3, scalb.3, scalbln.3, scandir.3, sched_getcpu.3, seekdir.3, sem_close.3, sem_destroy.3, sem_getvalue.3, sem_init.3, sem_open.3, sem_post.3, sem_unlink.3, sem_wait.3, setenv.3, setlocale.3, setlogmask.3, shm_open.3, siginterrupt.3, sigpause.3, sigqueue.3, sigset.3, sigsetops.3, sigvec.3, sigwait.3, sin.3, sinh.3, sleep.3, sockatmark.3, sqrt.3, statvfs.3, stdio_ext.3, stpcpy.3, strcasecmp.3, strcat.3, strchr.3, strcmp.3, strcoll.3, strcpy.3, strdup.3, strerror.3, strfry.3, strftime.3, string.3, strlen.3, strpbrk.3, strptime.3, strsep.3, strsignal.3, strspn.3, strstr.3, strtok.3, strtol.3, strtoul.3, strverscmp.3, strxfrm.3, swab.3, sysconf.3, syslog.3, system.3, sysv_signal.3, tan.3, tanh.3, tcgetpgrp.3, tcgetsid.3, telldir.3, tempnam.3, timegm.3, timeradd.3, tmpfile.3, tmpnam.3, toascii.3, toupper.3, trunc.3, tsearch.3, ttyslot.3, tzset.3, ulimit.3, undocumented.3, unlocked_stdio.3, usleep.3, y0.3, cpuid.4, full.4, initrd.4, mouse.4, msr.4, sd.4, st.4, acct.5, core.5, services.5, slabinfo.5, aio.7, capabilities.7, credentials.7, feature_test_macros.7, hier.7, inotify.7, libc.7, locale.7, man-pages.7, man.7, math_error.7, mq_overview.7, numa.7, path_resolution.7, pipe.7, pthreads.7, pty.7, rtld-audit.7, sem_overview.7, shm_overview.7, sigevent.7, signal.7, suffixes.7, svipc.7, termio.7, time.7, udplite.7, units.7, uri.7, sln.8: s/LICENSE_START(verbatim)/LICENSE_START(VERBATIM)/
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-10 09:29:01 +00:00
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.\" %%%LICENSE_START(VERBATIM)
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2008-10-25 02:56:41 +00:00
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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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intro.1, _exit.2, access.2, alarm.2, alloc_hugepages.2, arch_prctl.2, bind.2, chdir.2, chmod.2, chown.2, chroot.2, clock_getres.2, clock_nanosleep.2, close.2, connect.2, delete_module.2, dup.2, execve.2, exit_group.2, faccessat.2, fchmodat.2, fchownat.2, fcntl.2, fork.2, fstatat.2, fsync.2, futimesat.2, get_robust_list.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getpagesize.2, getpid.2, getresuid.2, getrlimit.2, getrusage.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, idle.2, init_module.2, intro.2, iopl.2, kcmp.2, kexec_load.2, kill.2, link.2, linkat.2, llseek.2, lookup_dcookie.2, madvise.2, mincore.2, mkdirat.2, mknodat.2, mmap.2, mmap2.2, mount.2, mprotect.2, mq_getsetattr.2, msgctl.2, msgget.2, msgop.2, msync.2, nice.2, open.2, openat.2, pause.2, perfmonctl.2, personality.2, pipe.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, quotactl.2, read.2, readahead.2, readdir.2, readlinkat.2, readv.2, reboot.2, recvmmsg.2, remap_file_pages.2, rename.2, renameat.2, rmdir.2, rt_sigqueueinfo.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, sendmmsg.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setresuid.2, setuid.2, setup.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, signal.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, splice.2, stat.2, statfs.2, stime.2, subpage_prot.2, swapon.2, symlink.2, symlinkat.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysfs.2, syslog.2, tee.2, time.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, times.2, tkill.2, umask.2, umount.2, uname.2, unlink.2, unlinkat.2, uselib.2, ustat.2, utime.2, utimensat.2, vfork.2, vhangup.2, vm86.2, vmsplice.2, wait.2, wait4.2, write.2, CPU_SET.3, INFINITY.3, abort.3, abs.3, acos.3, acosh.3, adjtime.3, aio_init.3, asin.3, asinh.3, asprintf.3, assert.3, assert_perror.3, atan.3, atan2.3, atanh.3, atexit.3, atof.3, atoi.3, basename.3, bcmp.3, bcopy.3, bindresvport.3, bsd_signal.3, bsearch.3, bstring.3, byteorder.3, bzero.3, catgets.3, catopen.3, cbrt.3, ceil.3, clearenv.3, clock.3, clock_getcpuclockid.3, closedir.3, confstr.3, copysign.3, cos.3, cosh.3, ctermid.3, ctime.3, difftime.3, dirfd.3, div.3, dl_iterate_phdr.3, dprintf.3, drand48.3, drand48_r.3, dysize.3, ecvt.3, ecvt_r.3, end.3, endian.3, erf.3, erfc.3, ether_aton.3, euidaccess.3, exit.3, exp.3, exp10.3, exp2.3, expm1.3, fabs.3, fcloseall.3, fexecve.3, ffs.3, fgetgrent.3, fgetpwent.3, finite.3, flockfile.3, floor.3, fmod.3, fnmatch.3, fopencookie.3, fpathconf.3, fpurge.3, frexp.3, fseeko.3, ftok.3, futimes.3, gcvt.3, get_nprocs_conf.3, getaddrinfo.3, getaddrinfo_a.3, getauxval.3, getcontext.3, getcwd.3, getdate.3, getdirentries.3, getdtablesize.3, getenv.3, getfsent.3, getgrent.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getifaddrs.3, getipnodebyname.3, getline.3, getlogin.3, getmntent.3, getnetent.3, getnetent_r.3, getopt.3, getprotoent.3, getprotoent_r.3, getpw.3, getpwent.3, getpwnam.3, getrpcent_r.3, gets.3, getservent.3, getservent_r.3, getumask.3, getusershell.3, getutmp.3, getw.3, glob.3, gnu_get_libc_version.3, gsignal.3, hypot.3, if_nameindex.3, if_nametoindex.3, ilogb.3, index.3, inet.3, inet_ntop.3, inet_pton.3, infnan.3, initgroups.3, insque.3, intro.3, isalpha.3, isatty.3, j0.3, ldexp.3, localeconv.3, log.3, log10.3, log1p.3, log2.3, logb.3, lrint.3, lround.3, lsearch.3, lseek64.3, makecontext.3, makedev.3, mallinfo.3, malloc.3, malloc_get_state.3, malloc_info.3, malloc_stats.3, malloc_trim.3, malloc_usable_size.3, mallopt.3, matherr.3, mcheck.3, memccpy.3, memchr.3, memcmp.3, memcpy.3, memfrob.3, memmem.3, memmove.3, memset.3, mkdtemp.3, mkfifo.3, mkfifoat.3, mkstemp.3, mktemp.3, modf.3, mq_close.3, mq_getattr.3, mq_notify.3, mq_open.3, mq_receive.3, mq_send.3, mq_unlink.3, mtrace.3, on_exit.3, opendir.3, posix_fallocate.3, posix_memalign.3, posix_openpt.3, pow.3, pow10.3, profil.3, psignal.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_cleanup_push_defer_np.3, pthread_create.3, pthread_detach.3, pthread_equal.3, pthread_exit.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_join.3, pthread_kill.3, pthread_kill_other_threads_np.3, pthread_self.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_setschedprio.3, pthread_sigmask.3, pthread_sigqueue.3, pthread_testcancel.3, pthread_tryjoin_np.3, pthread_yield.3, putenv.3, putpwent.3, puts.3, qecvt.3, qsort.3, raise.3, rand.3, random.3, random_r.3, re_comp.3, readdir.3, realpath.3, regex.3, remainder.3, remove.3, resolver.3, rewinddir.3, rint.3, round.3, scalb.3, scalbln.3, scandir.3, sched_getcpu.3, seekdir.3, sem_close.3, sem_destroy.3, sem_getvalue.3, sem_init.3, sem_open.3, sem_post.3, sem_unlink.3, sem_wait.3, setenv.3, setlocale.3, setlogmask.3, shm_open.3, siginterrupt.3, sigpause.3, sigqueue.3, sigset.3, sigsetops.3, sigvec.3, sigwait.3, sin.3, sinh.3, sleep.3, sockatmark.3, sqrt.3, statvfs.3, stdio_ext.3, stpcpy.3, strcasecmp.3, strcat.3, strchr.3, strcmp.3, strcoll.3, strcpy.3, strdup.3, strerror.3, strfry.3, strftime.3, string.3, strlen.3, strpbrk.3, strptime.3, strsep.3, strsignal.3, strspn.3, strstr.3, strtok.3, strtol.3, strtoul.3, strverscmp.3, strxfrm.3, swab.3, sysconf.3, syslog.3, system.3, sysv_signal.3, tan.3, tanh.3, tcgetpgrp.3, tcgetsid.3, telldir.3, tempnam.3, timegm.3, timeradd.3, tmpfile.3, tmpnam.3, toascii.3, toupper.3, trunc.3, tsearch.3, ttyslot.3, tzset.3, ulimit.3, undocumented.3, unlocked_stdio.3, usleep.3, y0.3, cpuid.4, full.4, initrd.4, mouse.4, msr.4, sd.4, st.4, acct.5, core.5, services.5, slabinfo.5, aio.7, capabilities.7, credentials.7, feature_test_macros.7, hier.7, inotify.7, libc.7, locale.7, man-pages.7, man.7, math_error.7, mq_overview.7, numa.7, path_resolution.7, pipe.7, pthreads.7, pty.7, rtld-audit.7, sem_overview.7, shm_overview.7, sigevent.7, signal.7, suffixes.7, svipc.7, termio.7, time.7, udplite.7, units.7, uri.7, sln.8: Global fix: Add LICENSE_START(verbatim)
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-10 09:28:40 +00:00
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.\" %%%LICENSE_END
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2008-10-25 02:56:41 +00:00
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.\"
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bind.2, chmod.2, chown.2, chroot.2, clock_getres.2, clone.2, connect.2, dup.2, fallocate.2, get_mempolicy.2, getpeername.2, getpriority.2, getsockname.2, getsockopt.2, gettimeofday.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, kill.2, mbind.2, mmap.2, mount.2, mprotect.2, nfsservctl.2, nice.2, open.2, perf_event_open.2, pipe.2, pkey_alloc.2, prctl.2, ptrace.2, quotactl.2, remap_file_pages.2, sched_setscheduler.2, set_mempolicy.2, signal.2, signalfd.2, swapon.2, sync_file_range.2, syscalls.2, timer_create.2, timerfd_create.2, utime.2, utimensat.2, wait.2, atof.3, ctime.3, errno.3, fclose.3, fflush.3, insque.3, malloc_get_state.3, mallopt.3, mbsnrtowcs.3, mq_close.3, mq_open.3, mq_receive.3, mq_send.3, printf.3, pthread_attr_init.3, pthread_create.3, pthread_setaffinity_np.3, ptsname.3, remainder.3, strtod.3, tgamma.3, timegm.3, tmpnam.3, ttyname.3, console_ioctl.4, elf.5, filesystems.5, proc.5, utmp.5, capabilities.7, cgroups.7, credentials.7, ddp.7, feature_test_macros.7, fifo.7, inotify.7, libc.7, mount_namespaces.7, namespaces.7, netlink.7, pid_namespaces.7, pkeys.7, shm_overview.7, standards.7, uri.7, user_namespaces.7: tstamp
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-12-12 09:45:24 +00:00
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.TH PTHREAD_ATTR_INIT 3 2016-12-12 "Linux" "Linux Programmer's Manual"
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2008-10-25 02:56:41 +00:00
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.SH NAME
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pthread_attr_init, pthread_attr_destroy \- initialize and destroy
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thread attributes object
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.SH SYNOPSIS
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.nf
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.B #include <pthread.h>
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.BI "int pthread_attr_init(pthread_attr_t *" attr );
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.BI "int pthread_attr_destroy(pthread_attr_t *" attr );
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.sp
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Compile and link with \fI\-pthread\fP.
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add_key.2, keyctl.2, request_key.2, offsetof.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_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_cleanup_push_defer_np.3, pthread_equal.3, pthread_exit.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_self.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedparam.3, pthread_setschedprio.3, pthread_testcancel.3: Global formatting fix: balance .nf/.fi pairs
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2012-03-12 15:37:22 +00:00
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.fi
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2008-10-25 02:56:41 +00:00
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.SH DESCRIPTION
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The
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.BR pthread_attr_init ()
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function initializes the thread attributes object pointed to by
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.IR attr
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with default attribute values.
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After this call, individual attributes of the object can be set
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|
|
using various related functions (listed under SEE ALSO),
|
|
|
|
and then the object can be used in one or more
|
|
|
|
.BR pthread_create (3)
|
|
|
|
calls that create threads.
|
|
|
|
|
2008-10-29 20:43:44 +00:00
|
|
|
Calling
|
2008-10-25 02:56:41 +00:00
|
|
|
.BR pthread_attr_init ()
|
|
|
|
on a thread attributes object that has already been initialized
|
|
|
|
results in undefined behavior.
|
|
|
|
|
|
|
|
When a thread attributes object is no longer required,
|
|
|
|
it should be destroyed using the
|
|
|
|
.BR pthread_attr_destroy ()
|
|
|
|
function.
|
|
|
|
Destroying a thread attributes object has no effect
|
|
|
|
on threads that were created using that object.
|
|
|
|
|
|
|
|
Once a thread attributes object has been destroyed,
|
|
|
|
it can be reinitialized using
|
|
|
|
.BR pthread_attr_init ().
|
|
|
|
Any other use of a destroyed thread attributes object
|
|
|
|
has undefined results.
|
|
|
|
.SH RETURN VALUE
|
|
|
|
On success, these functions return 0;
|
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
|
|
|
on error, they return a nonzero error number.
|
2008-10-25 02:56:41 +00:00
|
|
|
.SH ERRORS
|
2015-04-18 08:37:50 +00:00
|
|
|
POSIX.1 documents an
|
2008-10-25 02:56:41 +00:00
|
|
|
.B ENOMEM
|
|
|
|
error for
|
|
|
|
.BR pthread_attr_init ();
|
|
|
|
on Linux these functions always succeed
|
|
|
|
(but portable and future-proof applications should nevertheless
|
|
|
|
handle a possible error return).
|
2015-05-20 10:00:05 +00:00
|
|
|
.SH ATTRIBUTES
|
|
|
|
For an explanation of the terms used in this section, see
|
|
|
|
.BR attributes (7).
|
ctime.3, error.3, getmntent.3, getnetent_r.3, getrpcent_r.3, getservent_r.3, pthread_attr_init.3, pthread_getattr_np.3, pthread_tryjoin_np.3, rpc.3, setaliasent.3, setenv.3, unlocked_stdio.3: srcfix: Eliminate some groff warnings
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-06-24 15:19:21 +00:00
|
|
|
.ad l
|
2015-05-20 10:00:05 +00:00
|
|
|
.TS
|
|
|
|
allbox;
|
|
|
|
lbw22 lb lb
|
|
|
|
l l l.
|
|
|
|
Interface Attribute Value
|
|
|
|
T{
|
|
|
|
.BR pthread_attr_init (),
|
|
|
|
.BR pthread_attr_destroy ()
|
|
|
|
T} Thread safety MT-Safe
|
|
|
|
.TE
|
ctime.3, error.3, getmntent.3, getnetent_r.3, getrpcent_r.3, getservent_r.3, pthread_attr_init.3, pthread_getattr_np.3, pthread_tryjoin_np.3, rpc.3, setaliasent.3, setenv.3, unlocked_stdio.3: srcfix: Eliminate some groff warnings
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-06-24 15:19:21 +00:00
|
|
|
.ad
|
2008-10-25 02:56:41 +00:00
|
|
|
.SH CONFORMING TO
|
2015-04-18 08:37:50 +00:00
|
|
|
POSIX.1-2001, POSIX.1-2008.
|
2008-10-25 02:56:41 +00:00
|
|
|
.SH NOTES
|
|
|
|
The
|
|
|
|
.I pthread_attr_t
|
|
|
|
type should be treated as opaque:
|
|
|
|
any access to the object other than via pthreads functions
|
execve.2, fallocate.2, futex.2, sched_rr_get_interval.2, select_tut.2, shmget.2, timer_getoverrun.2, times.2, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_cleanup_push_defer_np.3, pthread_getattr_np.3, pthread_self.3, pthread_setaffinity_np.3, pthread_tryjoin_np.3, sem_open.3, stdin.3, rtc.4, tty_ioctl.4, unix.7: Global fix: s/non-portable/nonportable/
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 16:46:09 +00:00
|
|
|
is nonportable and produces undefined results.
|
2008-10-25 02:56:41 +00:00
|
|
|
.SH EXAMPLE
|
|
|
|
The program below optionally makes use of
|
|
|
|
.BR pthread_attr_init ()
|
|
|
|
and various related functions to initialize a thread attributes
|
|
|
|
object that is used to create a single thread.
|
|
|
|
Once created, the thread uses the
|
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
|
|
|
.BR pthread_getattr_np (3)
|
accept.2, execve.2, futimesat.2, getresuid.2, getrlimit.2, madvise.2, mq_getsetattr.2, msgctl.2, nice.2, open.2, poll.2, setresuid.2, shmctl.2, sigaction.2, times.2, utimensat.2, __setfpucw.3, atoi.3, endian.3, err.3, euidaccess.3, fenv.3, fopencookie.3, fpurge.3, getgrouplist.3, getutmp.3, j0.3, lgamma.3, netlink.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_cleanup_push_defer_np.3, pthread_getattr_np.3, pthread_kill_other_threads_np.3, pthread_setaffinity_np.3, pthread_tryjoin_np.3, pthread_yield.3, random_r.3, readdir.3, rtnetlink.3, scanf.3, setenv.3, significand.3, sigsetops.3, strerror.3, strstr.3, sysv_signal.3, termios.3, timegm.3, unlocked_stdio.3, y0.3, locale.5, bootparam.7, feature_test_macros.7, ip.7, locale.7, pthreads.7, rtld-audit.7, nscd.8: Global fix: s/non-standard/nonstandard/
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 16:37:52 +00:00
|
|
|
function (a nonstandard GNU extension) to retrieve the thread's
|
2008-10-25 02:56:41 +00:00
|
|
|
attributes, and then displays those attributes.
|
|
|
|
|
|
|
|
If the program is run with no command-line argument,
|
|
|
|
then it passes NULL as the
|
|
|
|
.I attr
|
|
|
|
argument of
|
|
|
|
.BR pthread_create (3),
|
|
|
|
so that the thread is created with default attributes.
|
|
|
|
Running the program on Linux/x86-32 with the NPTL threading implementation,
|
|
|
|
we see the following:
|
|
|
|
|
|
|
|
.in +4n
|
|
|
|
.nf
|
|
|
|
.\" Results from glibc 2.8, SUSE 11.0; Oct 2008
|
2014-11-14 17:33:23 +00:00
|
|
|
.RB "$" " ulimit \-s" " # No stack limit ==> default stack size is 2MB"
|
2008-10-25 02:56:41 +00:00
|
|
|
unlimited
|
eventfd.2, execve.2, getdents.2, ioprio_set.2, mprotect.2, signalfd.2, timerfd_create.2, wait.2, backtrace.3, clock_getcpuclockid.3, end.3, fmemopen.3, fopencookie.3, frexp.3, getdate.3, getgrouplist.3, getprotoent_r.3, getservent_r.3, gnu_get_libc_version.3, inet.3, inet_pton.3, makecontext.3, malloc.3, matherr.3, offsetof.3, pthread_attr_init.3, pthread_create.3, pthread_getattr_np.3, sem_wait.3, strftime.3, strtok.3, strtol.3, core.5, proc.5, cpuset.7, mq_overview.7: Global fix: Format user input in shell sessions in boldface
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2008-10-28 15:37:22 +00:00
|
|
|
.RB "$" " ./a.out"
|
2008-10-25 02:56:41 +00:00
|
|
|
Thread attributes:
|
|
|
|
Detach state = PTHREAD_CREATE_JOINABLE
|
|
|
|
Scope = PTHREAD_SCOPE_SYSTEM
|
|
|
|
Inherit scheduler = PTHREAD_INHERIT_SCHED
|
|
|
|
Scheduling policy = SCHED_OTHER
|
|
|
|
Scheduling priority = 0
|
|
|
|
Guard size = 4096 bytes
|
|
|
|
Stack address = 0x40196000
|
|
|
|
Stack size = 0x201000 bytes
|
|
|
|
.fi
|
|
|
|
.in
|
|
|
|
|
|
|
|
When we supply a stack size as a command-line argument,
|
|
|
|
the program initializes a thread attributes object,
|
|
|
|
sets various attributes in that object,
|
|
|
|
and passes a pointer to the object in the call to
|
|
|
|
.BR pthread_create (3).
|
|
|
|
Running the program on Linux/x86-32 with the NPTL threading implementation,
|
|
|
|
we see the following:
|
|
|
|
|
|
|
|
.in +4n
|
|
|
|
.nf
|
|
|
|
.\" Results from glibc 2.8, SUSE 11.0; Oct 2008
|
eventfd.2, execve.2, getdents.2, ioprio_set.2, mprotect.2, signalfd.2, timerfd_create.2, wait.2, backtrace.3, clock_getcpuclockid.3, end.3, fmemopen.3, fopencookie.3, frexp.3, getdate.3, getgrouplist.3, getprotoent_r.3, getservent_r.3, gnu_get_libc_version.3, inet.3, inet_pton.3, makecontext.3, malloc.3, matherr.3, offsetof.3, pthread_attr_init.3, pthread_create.3, pthread_getattr_np.3, sem_wait.3, strftime.3, strtok.3, strtol.3, core.5, proc.5, cpuset.7, mq_overview.7: Global fix: Format user input in shell sessions in boldface
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2008-10-28 15:37:22 +00:00
|
|
|
.RB "$" " ./a.out 0x3000000"
|
2008-10-25 02:56:41 +00:00
|
|
|
posix_memalign() allocated at 0x40197000
|
|
|
|
Thread attributes:
|
|
|
|
Detach state = PTHREAD_CREATE_DETACHED
|
|
|
|
Scope = PTHREAD_SCOPE_SYSTEM
|
|
|
|
Inherit scheduler = PTHREAD_EXPLICIT_SCHED
|
|
|
|
Scheduling policy = SCHED_OTHER
|
|
|
|
Scheduling priority = 0
|
|
|
|
Guard size = 0 bytes
|
|
|
|
Stack address = 0x40197000
|
|
|
|
Stack size = 0x3000000 bytes
|
|
|
|
.fi
|
|
|
|
.in
|
eventfd.2, getdents.2, mprotect.2, signalfd.2, timerfd_create.2, wait.2, backtrace.3, clock_getcpuclockid.3, end.3, fmemopen.3, fopencookie.3, getdate.3, getgrouplist.3, getprotoent_r.3, getservent_r.3, gnu_get_libc_version.3, inet.3, inet_pton.3, makecontext.3, matherr.3, offsetof.3, pthread_attr_init.3, pthread_create.3, pthread_getattr_np.3, sem_wait.3, strtol.3, core.5: global fix: Add ".SS Program source" to EXAMPLE
Add ".SS Program source" to clearly distinguish shell session and
descriptive text from actual program code.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2008-10-28 15:51:05 +00:00
|
|
|
.SS Program source
|
eventfd.2, getdents.2, mprotect.2, signalfd.2, timerfd_create.2, wait.2, backtrace.3, clock_getcpuclockid.3, end.3, fmemopen.3, fopencookie.3, frexp.3, getaddrinfo.3, getdate.3, getgrouplist.3, getprotoent_r.3, getservent_r.3, gnu_get_libc_version.3, inet.3, inet_pton.3, makecontext.3, matherr.3, offsetof.3, pthread_attr_init.3, pthread_create.3, pthread_getattr_np.3, sem_wait.3, strftime.3, strtok.3, strtol.3, core.5: srcfix
s/\.R " "/\\\&/ as a way of getting a blank line after a .SS heading.
(Suggested by Sam Varshavchik <mrsam@courier-mta.com>)
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2008-11-05 01:42:45 +00:00
|
|
|
\&
|
2008-10-25 02:56:41 +00:00
|
|
|
.nf
|
|
|
|
#define _GNU_SOURCE /* To get pthread_getattr_np() declaration */
|
|
|
|
#include <pthread.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
#include <errno.h>
|
|
|
|
|
2008-11-11 13:35:25 +00:00
|
|
|
#define handle_error_en(en, msg) \\
|
|
|
|
do { errno = en; perror(msg); exit(EXIT_FAILURE); } while (0)
|
2008-10-25 02:56:41 +00:00
|
|
|
|
|
|
|
static void
|
|
|
|
display_pthread_attr(pthread_attr_t *attr, char *prefix)
|
|
|
|
{
|
|
|
|
int s, i;
|
|
|
|
size_t v;
|
|
|
|
void *stkaddr;
|
|
|
|
struct sched_param sp;
|
|
|
|
|
|
|
|
s = pthread_attr_getdetachstate(attr, &i);
|
|
|
|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
|
|
handle_error_en(s, "pthread_attr_getdetachstate");
|
2008-10-25 02:56:41 +00:00
|
|
|
printf("%sDetach state = %s\\n", prefix,
|
|
|
|
(i == PTHREAD_CREATE_DETACHED) ? "PTHREAD_CREATE_DETACHED" :
|
|
|
|
(i == PTHREAD_CREATE_JOINABLE) ? "PTHREAD_CREATE_JOINABLE" :
|
|
|
|
"???");
|
|
|
|
|
|
|
|
s = pthread_attr_getscope(attr, &i);
|
|
|
|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
|
|
handle_error_en(s, "pthread_attr_getscope");
|
2008-10-25 02:56:41 +00:00
|
|
|
printf("%sScope = %s\\n", prefix,
|
|
|
|
(i == PTHREAD_SCOPE_SYSTEM) ? "PTHREAD_SCOPE_SYSTEM" :
|
|
|
|
(i == PTHREAD_SCOPE_PROCESS) ? "PTHREAD_SCOPE_PROCESS" :
|
|
|
|
"???");
|
|
|
|
|
|
|
|
s = pthread_attr_getinheritsched(attr, &i);
|
|
|
|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
|
|
handle_error_en(s, "pthread_attr_getinheritsched");
|
2008-10-25 02:56:41 +00:00
|
|
|
printf("%sInherit scheduler = %s\\n", prefix,
|
|
|
|
(i == PTHREAD_INHERIT_SCHED) ? "PTHREAD_INHERIT_SCHED" :
|
|
|
|
(i == PTHREAD_EXPLICIT_SCHED) ? "PTHREAD_EXPLICIT_SCHED" :
|
|
|
|
"???");
|
|
|
|
|
|
|
|
s = pthread_attr_getschedpolicy(attr, &i);
|
|
|
|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
|
|
handle_error_en(s, "pthread_attr_getschedpolicy");
|
2008-10-25 02:56:41 +00:00
|
|
|
printf("%sScheduling policy = %s\\n", prefix,
|
|
|
|
(i == SCHED_OTHER) ? "SCHED_OTHER" :
|
|
|
|
(i == SCHED_FIFO) ? "SCHED_FIFO" :
|
|
|
|
(i == SCHED_RR) ? "SCHED_RR" :
|
|
|
|
"???");
|
|
|
|
|
|
|
|
s = pthread_attr_getschedparam(attr, &sp);
|
|
|
|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
|
|
handle_error_en(s, "pthread_attr_getschedparam");
|
2008-10-25 02:56:41 +00:00
|
|
|
printf("%sScheduling priority = %d\\n", prefix, sp.sched_priority);
|
|
|
|
|
|
|
|
s = pthread_attr_getguardsize(attr, &v);
|
|
|
|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
|
|
handle_error_en(s, "pthread_attr_getguardsize");
|
2008-10-25 02:56:41 +00:00
|
|
|
printf("%sGuard size = %d bytes\\n", prefix, v);
|
|
|
|
|
|
|
|
s = pthread_attr_getstack(attr, &stkaddr, &v);
|
|
|
|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
|
|
handle_error_en(s, "pthread_attr_getstack");
|
2008-10-25 02:56:41 +00:00
|
|
|
printf("%sStack address = %p\\n", prefix, stkaddr);
|
2015-05-19 06:58:10 +00:00
|
|
|
printf("%sStack size = 0x%zx bytes\\n", prefix, v);
|
2008-10-25 02:56:41 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void *
|
|
|
|
thread_start(void *arg)
|
|
|
|
{
|
|
|
|
int s;
|
|
|
|
pthread_attr_t gattr;
|
|
|
|
|
|
|
|
/* pthread_getattr_np() is a non\-standard GNU extension that
|
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retrieves the attributes of the thread specified in its
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first argument */
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s = pthread_getattr_np(pthread_self(), &gattr);
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if (s != 0)
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2008-11-11 13:35:25 +00:00
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handle_error_en(s, "pthread_getattr_np");
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2008-10-25 02:56:41 +00:00
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printf("Thread attributes:\\n");
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display_pthread_attr(&gattr, "\\t");
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exit(EXIT_SUCCESS); /* Terminate all threads */
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}
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int
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main(int argc, char *argv[])
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{
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pthread_t thr;
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pthread_attr_t attr;
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pthread_attr_t *attrp; /* NULL or &attr */
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int s;
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attrp = NULL;
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/* If a command\-line argument was supplied, use it to set the
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stack\-size attribute and set a few other thread attributes,
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and set attrp pointing to thread attributes object */
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if (argc > 1) {
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int stack_size;
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void *sp;
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attrp = &attr;
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s = pthread_attr_init(&attr);
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if (s != 0)
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2008-11-11 13:35:25 +00:00
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handle_error_en(s, "pthread_attr_init");
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2008-10-25 02:56:41 +00:00
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s = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
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if (s != 0)
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2008-11-11 13:35:25 +00:00
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handle_error_en(s, "pthread_attr_setdetachstate");
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2008-10-25 02:56:41 +00:00
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s = pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
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if (s != 0)
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2008-11-11 13:35:25 +00:00
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handle_error_en(s, "pthread_attr_setinheritsched");
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2008-10-25 02:56:41 +00:00
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stack_size = strtoul(argv[1], NULL, 0);
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s = posix_memalign(&sp, sysconf(_SC_PAGESIZE), stack_size);
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if (s != 0)
|
2008-11-11 13:35:25 +00:00
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handle_error_en(s, "posix_memalign");
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2008-10-25 02:56:41 +00:00
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printf("posix_memalign() allocated at %p\\n", sp);
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|
s = pthread_attr_setstack(&attr, sp, stack_size);
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|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
|
|
handle_error_en(s, "pthread_attr_setstack");
|
2008-10-25 02:56:41 +00:00
|
|
|
}
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|
s = pthread_create(&thr, attrp, &thread_start, NULL);
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|
|
|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
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|
handle_error_en(s, "pthread_create");
|
2008-10-25 02:56:41 +00:00
|
|
|
|
|
|
|
if (attrp != NULL) {
|
|
|
|
s = pthread_attr_destroy(attrp);
|
|
|
|
if (s != 0)
|
2008-11-11 13:35:25 +00:00
|
|
|
handle_error_en(s, "pthread_attr_destroy");
|
2008-10-25 02:56:41 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
pause(); /* Terminates when other thread calls exit() */
|
|
|
|
}
|
|
|
|
.fi
|
|
|
|
.SH SEE ALSO
|
sched_get_priority_max.2, sched_setparam.2, sched_setaffinity.2, sched_setscheduler.2, timer_create.2, malloc.3, pthread_attr_init.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_getattr_np.3, pthread_cancel.3, pthread_create.3, pthread_setschedparam.3, pthread_setschedprio.3, aio.7, time.7: Global ffix: disable justification and hyphenation in SEE ALSO
For a better visual result, disable justification and hyphenation
in SEE ALSO where page names are long.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2012-09-25 04:34:17 +00:00
|
|
|
.ad l
|
|
|
|
.nh
|
2008-10-25 02:56:41 +00:00
|
|
|
.BR pthread_attr_setaffinity_np (3),
|
|
|
|
.BR pthread_attr_setdetachstate (3),
|
|
|
|
.BR pthread_attr_setguardsize (3),
|
|
|
|
.BR pthread_attr_setinheritsched (3),
|
|
|
|
.BR pthread_attr_setschedparam (3),
|
|
|
|
.BR pthread_attr_setschedpolicy (3),
|
|
|
|
.BR pthread_attr_setscope (3),
|
|
|
|
.BR pthread_attr_setstack (3),
|
|
|
|
.BR pthread_attr_setstackaddr (3),
|
|
|
|
.BR pthread_attr_setstacksize (3),
|
|
|
|
.BR pthread_create (3),
|
|
|
|
.BR pthread_getattr_np (3),
|
2016-08-24 04:40:07 +00:00
|
|
|
.BR pthread_setattr_default_np (3),
|
2008-10-25 02:56:41 +00:00
|
|
|
.BR pthreads (7)
|