2021-01-02 19:32:25 +00:00
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/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
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2003-03-25 20:41:26 +00:00
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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2012-02-09 23:18:22 +00:00
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License along with the GNU C Library; see the file COPYING.LIB. If
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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
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not, see <https://www.gnu.org/licenses/>. */
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2003-03-25 20:41:26 +00:00
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#include <errno.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <sysdep.h>
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#include <internaltypes.h>
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2021-06-22 07:50:27 +00:00
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#include <pthreadP.h>
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2003-03-25 20:41:26 +00:00
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#include "kernel-posix-timers.h"
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2005-04-27 08:03:47 +00:00
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#include "kernel-posix-cpu-timers.h"
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2021-06-28 07:51:00 +00:00
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#include <shlib-compat.h>
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2003-03-25 20:41:26 +00:00
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int
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2021-06-28 07:51:00 +00:00
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___timer_create (clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
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2003-03-25 20:41:26 +00:00
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{
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2012-08-16 14:03:43 +00:00
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{
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clockid_t syscall_clockid = (clock_id == CLOCK_PROCESS_CPUTIME_ID
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? MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED)
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: clock_id == CLOCK_THREAD_CPUTIME_ID
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? MAKE_THREAD_CPUCLOCK (0, CPUCLOCK_SCHED)
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: clock_id);
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/* If the user wants notification via a thread we need to handle
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this special. */
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if (evp == NULL
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|| __builtin_expect (evp->sigev_notify != SIGEV_THREAD, 1))
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{
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struct sigevent local_evp;
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if (evp == NULL)
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{
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/* The kernel has to pass up the timer ID which is a
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userlevel object. Therefore we cannot leave it up to
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the kernel to determine it. */
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local_evp.sigev_notify = SIGEV_SIGNAL;
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local_evp.sigev_signo = SIGALRM;
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2020-10-05 20:30:05 +00:00
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local_evp.sigev_value.sival_ptr = NULL;
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2012-08-16 14:03:43 +00:00
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evp = &local_evp;
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}
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kernel_timer_t ktimerid;
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2020-10-05 20:30:05 +00:00
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if (INLINE_SYSCALL_CALL (timer_create, syscall_clockid, evp,
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&ktimerid) == -1)
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return -1;
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2012-08-16 14:03:43 +00:00
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2020-10-05 20:30:05 +00:00
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*timerid = kernel_timer_to_timerid (ktimerid);
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2012-08-16 14:03:43 +00:00
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}
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else
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{
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/* Create the helper thread. */
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2021-06-28 07:51:00 +00:00
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__pthread_once (&__timer_helper_once, __timer_start_helper_thread);
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2021-06-25 08:51:31 +00:00
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if (__timer_helper_tid == 0)
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2012-08-16 14:03:43 +00:00
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{
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/* No resources to start the helper thread. */
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__set_errno (EAGAIN);
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2003-03-26 09:41:23 +00:00
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return -1;
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2012-08-16 14:03:43 +00:00
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}
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2020-10-05 20:30:05 +00:00
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struct timer *newp = malloc (sizeof (struct timer));
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2012-08-16 14:03:43 +00:00
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if (newp == NULL)
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return -1;
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/* Copy the thread parameters the user provided. */
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newp->sival = evp->sigev_value;
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newp->thrfunc = evp->sigev_notify_function;
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/* We cannot simply copy the thread attributes since the
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implementation might keep internal information for
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each instance. */
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2021-06-28 07:51:00 +00:00
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__pthread_attr_init (&newp->attr);
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2012-08-16 14:03:43 +00:00
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if (evp->sigev_notify_attributes != NULL)
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{
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struct pthread_attr *nattr;
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struct pthread_attr *oattr;
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nattr = (struct pthread_attr *) &newp->attr;
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oattr = (struct pthread_attr *) evp->sigev_notify_attributes;
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nattr->schedparam = oattr->schedparam;
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nattr->schedpolicy = oattr->schedpolicy;
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nattr->flags = oattr->flags;
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nattr->guardsize = oattr->guardsize;
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nattr->stackaddr = oattr->stackaddr;
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nattr->stacksize = oattr->stacksize;
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}
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/* In any case set the detach flag. */
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2021-06-28 07:51:00 +00:00
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__pthread_attr_setdetachstate (&newp->attr, PTHREAD_CREATE_DETACHED);
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2012-08-16 14:03:43 +00:00
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/* Create the event structure for the kernel timer. */
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struct sigevent sev =
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{ .sigev_value.sival_ptr = newp,
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.sigev_signo = SIGTIMER,
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.sigev_notify = SIGEV_SIGNAL | SIGEV_THREAD_ID,
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2021-06-25 08:51:31 +00:00
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._sigev_un = { ._pad = { [0] = __timer_helper_tid } } };
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2012-08-16 14:03:43 +00:00
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/* Create the timer. */
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int res;
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2020-10-05 20:30:05 +00:00
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res = INTERNAL_SYSCALL_CALL (timer_create, syscall_clockid, &sev,
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&newp->ktimerid);
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if (INTERNAL_SYSCALL_ERROR_P (res))
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2012-08-16 14:03:43 +00:00
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{
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2020-10-05 20:30:05 +00:00
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free (newp);
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__set_errno (INTERNAL_SYSCALL_ERRNO (res));
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return -1;
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2012-08-16 14:03:43 +00:00
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}
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2020-10-05 20:30:05 +00:00
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/* Add to the queue of active timers with thread delivery. */
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2021-06-28 07:51:00 +00:00
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__pthread_mutex_lock (&__timer_active_sigev_thread_lock);
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2021-06-25 08:51:31 +00:00
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newp->next = __timer_active_sigev_thread;
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__timer_active_sigev_thread = newp;
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2021-06-28 07:51:00 +00:00
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__pthread_mutex_unlock (&__timer_active_sigev_thread_lock);
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2012-08-16 14:03:43 +00:00
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2020-10-05 20:30:05 +00:00
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*timerid = timer_to_timerid (newp);
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2012-08-16 14:03:43 +00:00
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}
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}
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2020-10-05 20:30:05 +00:00
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return 0;
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2003-03-25 20:41:26 +00:00
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}
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2021-06-28 07:51:00 +00:00
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versioned_symbol (libc, ___timer_create, timer_create, GLIBC_2_34);
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libc_hidden_ver (___timer_create, __timer_create)
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#if TIMER_T_WAS_INT_COMPAT
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# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_3_3, GLIBC_2_34)
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compat_symbol (librt, ___timer_create, timer_create, GLIBC_2_3_3);
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# endif
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# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_3_3)
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2021-06-28 07:51:01 +00:00
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timer_t __timer_compat_list[OLD_TIMER_MAX];
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2021-06-28 07:51:00 +00:00
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int
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__timer_create_old (clockid_t clock_id, struct sigevent *evp, int *timerid)
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{
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timer_t newp;
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int res = __timer_create (clock_id, evp, &newp);
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if (res == 0)
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{
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int i;
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for (i = 0; i < OLD_TIMER_MAX; ++i)
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if (__timer_compat_list[i] == NULL
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&& ! atomic_compare_and_exchange_bool_acq (&__timer_compat_list[i],
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newp, NULL))
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{
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*timerid = i;
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break;
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}
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if (__glibc_unlikely (i == OLD_TIMER_MAX))
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{
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/* No free slot. */
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__timer_delete (newp);
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__set_errno (EINVAL);
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res = -1;
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}
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}
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return res;
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}
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compat_symbol (librt, __timer_create_old, timer_create, GLIBC_2_2);
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# endif /* OTHER_SHLIB_COMPAT */
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#else /* !TIMER_T_WAS_INT_COMPAT */
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# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_34)
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compat_symbol (librt, ___timer_create, timer_create, GLIBC_2_2);
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# endif
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#endif /* !TIMER_T_WAS_INT_COMPAT */
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