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rt: Move generic implementation from sysdeps/pthread to rt

Browse Source 
The pthread-based implementation is the generic one.  Replacing
the stubs makes it clear that they do not have to be adjusted for
the libpthread move.

Result of:

    git mv -f sysdeps/pthread/aio_misc.h sysdeps/generic/
    git mv sysdeps/pthread/timer_routines.c sysdeps/htl/
    git mv -f sysdeps/pthread/{aio,lio,timer}_*.c rt/

Followed by manual adjustment of the #include paths in
sysdeps/unix/sysv/linux/wordsize-64, and a move of the version
definitions formerly in sysdeps/pthread/Versions.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2021-06-22 09:50:27 +02:00
parent ae830b2d9f
commit daa3fc9bff
44 changed files with 2019 additions and 2546 deletions
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156
rt/timer_create.c
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@ -1,10 +1,11 @@
/* Copyright (C) 1999-2021 Free Software Foundation, Inc.
/* Copyright (C) 2000-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
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.
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
@ -12,17 +13,154 @@
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; if not, see
<https://www.gnu.org/licenses/>. */
License along with the GNU C Library; see the file COPYING.LIB. If
not, see <https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <signal.h>
#include <pthread.h>
#include <time.h>
#include <unistd.h>
#include "posix-timer.h"
/* Create new per-process timer using CLOCK. */
int
timer_create (clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
{
__set_errno (ENOSYS);
return -1;
int retval = -1;
struct timer_node *newtimer = NULL;
struct thread_node *thread = NULL;
if (0
#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
|| clock_id == CLOCK_PROCESS_CPUTIME_ID
#endif
#if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0
|| clock_id == CLOCK_THREAD_CPUTIME_ID
#endif
)
{
/* We don't allow timers for CPU clocks. At least not in the
moment. */
__set_errno (ENOTSUP);
return -1;
}
if (clock_id != CLOCK_REALTIME)
{
__set_errno (EINVAL);
return -1;
}
pthread_once (&__timer_init_once_control, __timer_init_once);
if (__timer_init_failed)
{
__set_errno (ENOMEM);
return -1;
}
pthread_mutex_lock (&__timer_mutex);
newtimer = __timer_alloc ();
if (__glibc_unlikely (newtimer == NULL))
{
__set_errno (EAGAIN);
goto unlock_bail;
}
if (evp != NULL)
newtimer->event = *evp;
else
{
newtimer->event.sigev_notify = SIGEV_SIGNAL;
newtimer->event.sigev_signo = SIGALRM;
newtimer->event.sigev_value.sival_ptr = newtimer;
newtimer->event.sigev_notify_function = 0;
}
newtimer->event.sigev_notify_attributes = &newtimer->attr;
newtimer->creator_pid = getpid ();
switch (__builtin_expect (newtimer->event.sigev_notify, SIGEV_SIGNAL))
{
case SIGEV_NONE:
case SIGEV_SIGNAL:
/* We have a global thread for delivering timed signals.
If it is not running, try to start it up. */
thread = &__timer_signal_thread_rclk;
if (! thread->exists)
{
if (__builtin_expect (__timer_thread_start (thread),
1) < 0)
{
__set_errno (EAGAIN);
goto unlock_bail;
}
}
break;
case SIGEV_THREAD:
/* Copy over thread attributes or set up default ones. */
if (evp->sigev_notify_attributes)
newtimer->attr = *(pthread_attr_t *) evp->sigev_notify_attributes;
else
pthread_attr_init (&newtimer->attr);
/* Ensure thread attributes call for deatched thread. */
pthread_attr_setdetachstate (&newtimer->attr, PTHREAD_CREATE_DETACHED);
/* Try to find existing thread having the right attributes. */
thread = __timer_thread_find_matching (&newtimer->attr, clock_id);
/* If no existing thread has these attributes, try to allocate one. */
if (thread == NULL)
thread = __timer_thread_alloc (&newtimer->attr, clock_id);
/* Out of luck; no threads are available. */
if (__glibc_unlikely (thread == NULL))
{
__set_errno (EAGAIN);
goto unlock_bail;
}
/* If the thread is not running already, try to start it. */
if (! thread->exists
&& __builtin_expect (! __timer_thread_start (thread), 0))
{
__set_errno (EAGAIN);
goto unlock_bail;
}
break;
default:
__set_errno (EINVAL);
goto unlock_bail;
}
newtimer->clock = clock_id;
newtimer->abstime = 0;
newtimer->armed = 0;
newtimer->thread = thread;
*timerid = timer_ptr2id (newtimer);
retval = 0;
if (__builtin_expect (retval, 0) == -1)
{
unlock_bail:
if (thread != NULL)
__timer_thread_dealloc (thread);
if (newtimer != NULL)
{
timer_delref (newtimer);
__timer_dealloc (newtimer);
}
}
pthread_mutex_unlock (&__timer_mutex);
return retval;
}
stub_warning (timer_create)