View of xos/usr/lib/ld-so/initfini.c

/* Copyright (C) 2008  Emmanuel Varoquaux
 
   This file is part of XOS.
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
   This program 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 General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
#include "initfini.h"
 
#include "object_info.h"
 
void initfini_list_init(struct initfini_list_struct *initfini_list)
{
  initfini_list->first = NULL;
  initfini_list->last = NULL;
}
 
void initfini_list_push_back(struct initfini_list_struct *initfini_list, struct object_info_struct *object_info)
{
  object_info->initfini_previous = initfini_list->last;
  object_info->initfini_next = NULL;
  if (initfini_list->last)
    initfini_list->last->initfini_next = object_info;
  else
    initfini_list->first = object_info;
  initfini_list->last = object_info;
}
 
struct object_info_struct *initfini_list_pop_front(struct initfini_list_struct *initfini_list)
{
  struct object_info_struct *object_info;
 
  if (initfini_list->first) {
    object_info = initfini_list->first;
    initfini_list->first = object_info->initfini_next;
    if (object_info->initfini_next)
      object_info->initfini_next->initfini_previous = NULL;
    else
      initfini_list->last = NULL;
    return object_info;
  }
  else
    return NULL;
}
 
void initfini_list_remove(struct initfini_list_struct *initfini_list, struct object_info_struct *object_info)
{
  if (object_info->initfini_previous)
    object_info->initfini_previous->initfini_next = object_info->initfini_next;
  else
    initfini_list->first = object_info->initfini_next;
  if (object_info->initfini_next)
    object_info->initfini_next->initfini_previous = object_info->initfini_previous;
  else
    initfini_list->last = object_info->initfini_previous;
}