timer_delete.c

来自「glibc 库, 不仅可以学习使用库函数,还可以学习函数的具体实现,是提高功力的」· C语言 代码 · 共 46 行

/* Copyright (C) 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <[e-mail]>, 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,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <shlib-compat.h>
#include "compat-timer.h"


#define timer_delete_alias __timer_delete_new
#include "../timer_delete.c"

#undef timer_delete
versioned_symbol (librt, __timer_delete_new, timer_delete, GLIBC_2_3_3);


#if SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_3_3)
int
__timer_delete_old (int timerid)
{
  int res = __timer_delete_new (__compat_timer_list[timerid]);

  if (res == 0)
    /* Successful timer deletion, now free the index.  We only need to
       store a word and that better be atomic.  */
    __compat_timer_list[timerid] = NULL;

  return res;
}
compat_symbol (librt, __timer_delete_old, timer_delete, GLIBC_2_2);
#endif