mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-05 11:11:04 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
187 lines
5.4 KiB
C
187 lines
5.4 KiB
C
/* Copyright (C) 2003-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public License as
|
|
published by the Free Software Foundation; either version 2.1 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <sysdep.h>
|
|
#include <internaltypes.h>
|
|
#include <pthreadP.h>
|
|
#include "kernel-posix-timers.h"
|
|
#include "kernel-posix-cpu-timers.h"
|
|
#include <shlib-compat.h>
|
|
|
|
int
|
|
___timer_create (clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
|
|
{
|
|
{
|
|
clockid_t syscall_clockid = (clock_id == CLOCK_PROCESS_CPUTIME_ID
|
|
? MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED)
|
|
: clock_id == CLOCK_THREAD_CPUTIME_ID
|
|
? MAKE_THREAD_CPUCLOCK (0, CPUCLOCK_SCHED)
|
|
: clock_id);
|
|
|
|
/* If the user wants notification via a thread we need to handle
|
|
this special. */
|
|
if (evp == NULL
|
|
|| __builtin_expect (evp->sigev_notify != SIGEV_THREAD, 1))
|
|
{
|
|
struct sigevent local_evp;
|
|
|
|
if (evp == NULL)
|
|
{
|
|
/* The kernel has to pass up the timer ID which is a
|
|
userlevel object. Therefore we cannot leave it up to
|
|
the kernel to determine it. */
|
|
local_evp.sigev_notify = SIGEV_SIGNAL;
|
|
local_evp.sigev_signo = SIGALRM;
|
|
local_evp.sigev_value.sival_ptr = NULL;
|
|
|
|
evp = &local_evp;
|
|
}
|
|
|
|
kernel_timer_t ktimerid;
|
|
if (INLINE_SYSCALL_CALL (timer_create, syscall_clockid, evp,
|
|
&ktimerid) == -1)
|
|
return -1;
|
|
|
|
*timerid = kernel_timer_to_timerid (ktimerid);
|
|
}
|
|
else
|
|
{
|
|
/* Create the helper thread. */
|
|
__pthread_once (&__timer_helper_once, __timer_start_helper_thread);
|
|
if (__timer_helper_tid == 0)
|
|
{
|
|
/* No resources to start the helper thread. */
|
|
__set_errno (EAGAIN);
|
|
return -1;
|
|
}
|
|
|
|
struct timer *newp = malloc (sizeof (struct timer));
|
|
if (newp == NULL)
|
|
return -1;
|
|
|
|
/* Copy the thread parameters the user provided. */
|
|
newp->sival = evp->sigev_value;
|
|
newp->thrfunc = evp->sigev_notify_function;
|
|
|
|
/* We cannot simply copy the thread attributes since the
|
|
implementation might keep internal information for
|
|
each instance. */
|
|
__pthread_attr_init (&newp->attr);
|
|
if (evp->sigev_notify_attributes != NULL)
|
|
{
|
|
struct pthread_attr *nattr;
|
|
struct pthread_attr *oattr;
|
|
|
|
nattr = (struct pthread_attr *) &newp->attr;
|
|
oattr = (struct pthread_attr *) evp->sigev_notify_attributes;
|
|
|
|
nattr->schedparam = oattr->schedparam;
|
|
nattr->schedpolicy = oattr->schedpolicy;
|
|
nattr->flags = oattr->flags;
|
|
nattr->guardsize = oattr->guardsize;
|
|
nattr->stackaddr = oattr->stackaddr;
|
|
nattr->stacksize = oattr->stacksize;
|
|
}
|
|
|
|
/* In any case set the detach flag. */
|
|
__pthread_attr_setdetachstate (&newp->attr, PTHREAD_CREATE_DETACHED);
|
|
|
|
/* Create the event structure for the kernel timer. */
|
|
struct sigevent sev =
|
|
{ .sigev_value.sival_ptr = newp,
|
|
.sigev_signo = SIGTIMER,
|
|
.sigev_notify = SIGEV_SIGNAL | SIGEV_THREAD_ID,
|
|
._sigev_un = { ._pad = { [0] = __timer_helper_tid } } };
|
|
|
|
/* Create the timer. */
|
|
int res;
|
|
res = INTERNAL_SYSCALL_CALL (timer_create, syscall_clockid, &sev,
|
|
&newp->ktimerid);
|
|
if (INTERNAL_SYSCALL_ERROR_P (res))
|
|
{
|
|
free (newp);
|
|
__set_errno (INTERNAL_SYSCALL_ERRNO (res));
|
|
return -1;
|
|
}
|
|
|
|
/* Add to the queue of active timers with thread delivery. */
|
|
__pthread_mutex_lock (&__timer_active_sigev_thread_lock);
|
|
newp->next = __timer_active_sigev_thread;
|
|
__timer_active_sigev_thread = newp;
|
|
__pthread_mutex_unlock (&__timer_active_sigev_thread_lock);
|
|
|
|
*timerid = timer_to_timerid (newp);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
versioned_symbol (libc, ___timer_create, timer_create, GLIBC_2_34);
|
|
libc_hidden_ver (___timer_create, __timer_create)
|
|
|
|
#if TIMER_T_WAS_INT_COMPAT
|
|
# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_3_3, GLIBC_2_34)
|
|
compat_symbol (librt, ___timer_create, timer_create, GLIBC_2_3_3);
|
|
# endif
|
|
|
|
# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_3_3)
|
|
timer_t __timer_compat_list[OLD_TIMER_MAX];
|
|
|
|
int
|
|
__timer_create_old (clockid_t clock_id, struct sigevent *evp, int *timerid)
|
|
{
|
|
timer_t newp;
|
|
|
|
int res = __timer_create (clock_id, evp, &newp);
|
|
if (res == 0)
|
|
{
|
|
int i;
|
|
for (i = 0; i < OLD_TIMER_MAX; ++i)
|
|
if (__timer_compat_list[i] == NULL
|
|
&& ! atomic_compare_and_exchange_bool_acq (&__timer_compat_list[i],
|
|
newp, NULL))
|
|
{
|
|
*timerid = i;
|
|
break;
|
|
}
|
|
|
|
if (__glibc_unlikely (i == OLD_TIMER_MAX))
|
|
{
|
|
/* No free slot. */
|
|
__timer_delete (newp);
|
|
__set_errno (EINVAL);
|
|
res = -1;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
compat_symbol (librt, __timer_create_old, timer_create, GLIBC_2_2);
|
|
# endif /* OTHER_SHLIB_COMPAT */
|
|
|
|
#else /* !TIMER_T_WAS_INT_COMPAT */
|
|
# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_34)
|
|
compat_symbol (librt, ___timer_create, timer_create, GLIBC_2_2);
|
|
# endif
|
|
#endif /* !TIMER_T_WAS_INT_COMPAT */
|