/* Copyright (C) 2003-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.

   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 <http://www.gnu.org/licenses/>.  */

#include <pthread.h>

#include <setjmp.h>

#include <signal.h>

#include <sys/types.h>

/* Nonzero if the system calls are not available.  */

extern int __no_posix_timers attribute_hidden;

/* Callback to start helper thread.  */

extern void __start_helper_thread (void) attribute_hidden;

/* Control variable for helper thread creation.  */

extern pthread_once_t __helper_once attribute_hidden;

/* TID of the helper thread.  */

extern pid_t __helper_tid attribute_hidden;

/* List of active SIGEV_THREAD timers.  */

extern struct timer *__active_timer_sigev_thread attribute_hidden;

/* Lock for the __active_timer_sigev_thread.  */

extern pthread_mutex_t __active_timer_sigev_thread_lock attribute_hidden;

/* Type of timers in the kernel.  */

typedef int kernel_timer_t;

/* Internal representation of timer.  */

struct timer

{

  /* Notification mechanism.  */

  int sigev_notify;

  /* Timer ID returned by the kernel.  */

  kernel_timer_t ktimerid;

  /* All new elements must be added after ktimerid.  And if the thrfunc

     element is not the third element anymore the memory allocation in

     timer_create needs to be changed.  */

  /* Parameters for the thread to be started for SIGEV_THREAD.  */

  void (*thrfunc) (sigval_t);

  sigval_t sival;

  pthread_attr_t attr;

  /* Next element in list of active SIGEV_THREAD timers.  */

  struct timer *next;

};