/* 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 <errno.h>

#include <stdlib.h>

#include <time.h>

#include <sysdep.h>

#include "kernel-posix-timers.h"

#ifdef timer_delete_alias

# define timer_delete timer_delete_alias

#endif

int

timer_delete (timer_t timerid)

{

#undef timer_delete

  struct timer *kt = (struct timer *) timerid;

  /* Delete the kernel timer object.  */

  int res = INLINE_SYSCALL (timer_delete, 1, kt->ktimerid);

  if (res == 0)

    {

      if (kt->sigev_notify == SIGEV_THREAD)

	{

	  /* Remove the timer from the list.  */

	  pthread_mutex_lock (&__active_timer_sigev_thread_lock);

	  if (__active_timer_sigev_thread == kt)

	    __active_timer_sigev_thread = kt->next;

	  else

	    {

	      struct timer *prevp = __active_timer_sigev_thread;

	      while (prevp->next != NULL)

		if (prevp->next == kt)

		  {

		    prevp->next = kt->next;

		    break;

		  }

		else

		  prevp = prevp->next;

	    }

	  pthread_mutex_unlock (&__active_timer_sigev_thread_lock);

	}

      /* Free the memory.  */

      (void) free (kt);

      return 0;

    }

  /* The kernel timer is not known or something else bad happened.

     Return the error.  */

  return -1;

}