glib/gtrashstack.c

   1 /* GLIB - Library of useful routines for C programming
   2  * Copyright (C) 1995-1998  Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GLib Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "config.h"
  28
  29 /**
  30  * SECTION:trash_stack
  31  * @title: Trash Stacks
  32  * @short_description: maintain a stack of unused allocated memory chunks
  33  *
  34  * A #GTrashStack is an efficient way to keep a stack of unused allocated
  35  * memory chunks. Each memory chunk is required to be large enough to hold
  36  * a #gpointer. This allows the stack to be maintained without any space
  37  * overhead, since the stack pointers can be stored inside the memory chunks.
  38  *
  39  * There is no function to create a #GTrashStack. A %NULL #GTrashStack*
  40  * is a perfectly valid empty stack.
  41  */
  42
  43 /**
  44  * GTrashStack:
  45  * @next: pointer to the previous element of the stack,
  46  *     gets stored in the first <literal>sizeof (gpointer)</literal>
  47  *     bytes of the element
  48  *
  49  * Each piece of memory that is pushed onto the stack
  50  * is cast to a <structname>GTrashStack*</structname>.
  51  */
  52
  53 /**
  54  * g_trash_stack_push:
  55  * @stack_p: a #GTrashStack
  56  * @data_p: the piece of memory to push on the stack
  57  *
  58  * Pushes a piece of memory onto a #GTrashStack.
  59  */
  60
  61 /**
  62  * g_trash_stack_pop:
  63  * @stack_p: a #GTrashStack
  64  *
  65  * Pops a piece of memory off a #GTrashStack.
  66  *
  67  * Returns: the element at the top of the stack
  68  */
  69
  70 /**
  71  * g_trash_stack_peek:
  72  * @stack_p: a #GTrashStack
  73  *
  74  * Returns the element at the top of a #GTrashStack
  75  * which may be %NULL.
  76  *
  77  * Returns: the element at the top of the stack
  78  */
  79
  80 /**
  81  * g_trash_stack_height:
  82  * @stack_p: a #GTrashStack
  83  *
  84  * Returns the height of a #GTrashStack.
  85  *
  86  * Note that execution of this function is of O(N) complexity
  87  * where N denotes the number of items on the stack.
  88  *
  89  * Returns: the height of the stack
  90  */
  91
  92 #define G_IMPLEMENT_INLINES 1
  93 #define __G_TRASH_STACK_C__
  94 #include "gtrashstack.h"