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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Trash Stacks: GLib Reference Manual</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="index.html" title="GLib Reference Manual"> <link rel="up" href="glib-data-types.html" title="GLib Data Types"> <link rel="prev" href="glib-Sequences.html" title="Sequences"> <link rel="next" href="glib-Hash-Tables.html" title="Hash Tables"> <meta name="generator" content="GTK-Doc V1.32 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"> <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> <a href="#glib-Trash-Stacks.description" class="shortcut">Description</a></span> </td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="glib-data-types.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="glib-Sequences.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="glib-Hash-Tables.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="glib-Trash-Stacks"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="glib-Trash-Stacks.top_of_page"></a>Trash Stacks</span></h2> <p>Trash Stacks — maintain a stack of unused allocated memory chunks</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="glib-Trash-Stacks.functions"></a><h2>Functions</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="functions_proto_type"> <col class="functions_proto_name"> </colgroup> <tbody> <tr> <td class="function_type"> <span class="returnvalue">void</span> </td> <td class="function_name"> <a class="link" href="glib-Trash-Stacks.html#g-trash-stack-push" title="g_trash_stack_push ()">g_trash_stack_push</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="returnvalue">gpointer</span></a> </td> <td class="function_name"> <a class="link" href="glib-Trash-Stacks.html#g-trash-stack-pop" title="g_trash_stack_pop ()">g_trash_stack_pop</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="returnvalue">gpointer</span></a> </td> <td class="function_name"> <a class="link" href="glib-Trash-Stacks.html#g-trash-stack-peek" title="g_trash_stack_peek ()">g_trash_stack_peek</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="glib-Basic-Types.html#guint" title="guint"><span class="returnvalue">guint</span></a> </td> <td class="function_name"> <a class="link" href="glib-Trash-Stacks.html#g-trash-stack-height" title="g_trash_stack_height ()">g_trash_stack_height</a> <span class="c_punctuation">()</span> </td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="glib-Trash-Stacks.other"></a><h2>Types and Values</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="other_proto_type"> <col class="other_proto_name"> </colgroup> <tbody><tr> <td class="datatype_keyword">struct</td> <td class="function_name"><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack">GTrashStack</a></td> </tr></tbody> </table></div> </div> <div class="refsect1"> <a name="glib-Trash-Stacks.includes"></a><h2>Includes</h2> <pre class="synopsis">#include <gmodule.h> </pre> </div> <div class="refsect1"> <a name="glib-Trash-Stacks.description"></a><h2>Description</h2> <p>A <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> is an efficient way to keep a stack of unused allocated memory chunks. Each memory chunk is required to be large enough to hold a <a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a>. This allows the stack to be maintained without any space overhead, since the stack pointers can be stored inside the memory chunks.</p> <p>There is no function to create a <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a>. A <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a>* is a perfectly valid empty stack.</p> <p>There is no longer any good reason to use <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a>. If you have extra pieces of memory, <code class="function">free()</code> them and allocate them again later.</p> </div> <div class="refsect1"> <a name="glib-Trash-Stacks.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="g-trash-stack-push"></a><h3>g_trash_stack_push ()</h3> <pre class="programlisting"><span class="returnvalue">void</span> g_trash_stack_push (<em class="parameter"><code><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> **stack_p</code></em>, <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> data_p</code></em>);</pre> <div class="warning"> <p><code class="literal">g_trash_stack_push</code> has been deprecated since version 2.48 and should not be used in newly-written code.</p> <p><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> is deprecated without replacement</p> </div> <p>Pushes a piece of memory onto a <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a>.</p> <div class="refsect3"> <a name="g-trash-stack-push.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>stack_p</p></td> <td class="parameter_description"><p>a <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a></p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>data_p</p></td> <td class="parameter_description"><p>the piece of memory to push on the stack. </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL must not be passed as the value in, out, in-out; or as a return value."><span class="acronym">not nullable</span></acronym>]</span></td> </tr> </tbody> </table></div> </div> </div> <hr> <div class="refsect2"> <a name="g-trash-stack-pop"></a><h3>g_trash_stack_pop ()</h3> <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="returnvalue">gpointer</span></a> g_trash_stack_pop (<em class="parameter"><code><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> **stack_p</code></em>);</pre> <div class="warning"> <p><code class="literal">g_trash_stack_pop</code> has been deprecated since version 2.48 and should not be used in newly-written code.</p> <p><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> is deprecated without replacement</p> </div> <p>Pops a piece of memory off a <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a>.</p> <div class="refsect3"> <a name="g-trash-stack-pop.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>stack_p</p></td> <td class="parameter_description"><p>a <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a></p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="g-trash-stack-pop.returns"></a><h4>Returns</h4> <p> the element at the top of the stack</p> </div> </div> <hr> <div class="refsect2"> <a name="g-trash-stack-peek"></a><h3>g_trash_stack_peek ()</h3> <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="returnvalue">gpointer</span></a> g_trash_stack_peek (<em class="parameter"><code><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> **stack_p</code></em>);</pre> <div class="warning"> <p><code class="literal">g_trash_stack_peek</code> has been deprecated since version 2.48 and should not be used in newly-written code.</p> <p><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> is deprecated without replacement</p> </div> <p>Returns the element at the top of a <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> which may be <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a>.</p> <div class="refsect3"> <a name="g-trash-stack-peek.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>stack_p</p></td> <td class="parameter_description"><p>a <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a></p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="g-trash-stack-peek.returns"></a><h4>Returns</h4> <p> the element at the top of the stack</p> </div> </div> <hr> <div class="refsect2"> <a name="g-trash-stack-height"></a><h3>g_trash_stack_height ()</h3> <pre class="programlisting"><a class="link" href="glib-Basic-Types.html#guint" title="guint"><span class="returnvalue">guint</span></a> g_trash_stack_height (<em class="parameter"><code><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> **stack_p</code></em>);</pre> <div class="warning"> <p><code class="literal">g_trash_stack_height</code> has been deprecated since version 2.48 and should not be used in newly-written code.</p> <p><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> is deprecated without replacement</p> </div> <p>Returns the height of a <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a>.</p> <p>Note that execution of this function is of O(N) complexity where N denotes the number of items on the stack.</p> <div class="refsect3"> <a name="g-trash-stack-height.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>stack_p</p></td> <td class="parameter_description"><p>a <a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a></p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="g-trash-stack-height.returns"></a><h4>Returns</h4> <p> the height of the stack</p> </div> </div> </div> <div class="refsect1"> <a name="glib-Trash-Stacks.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="GTrashStack"></a><h3>struct GTrashStack</h3> <pre class="programlisting">struct GTrashStack { GTrashStack *next; }; </pre> <div class="warning"> <p><code class="literal">GTrashStack</code> has been deprecated since version 2.48 and should not be used in newly-written code.</p> <p><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> is deprecated without replacement</p> </div> <p>Each piece of memory that is pushed onto the stack is cast to a GTrashStack*.</p> <div class="refsect3"> <a name="GTrashStack.members"></a><h4>Members</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="300px" class="struct_members_name"> <col class="struct_members_description"> <col width="200px" class="struct_members_annotations"> </colgroup> <tbody><tr> <td class="struct_member_name"><p><a class="link" href="glib-Trash-Stacks.html#GTrashStack" title="struct GTrashStack"><span class="type">GTrashStack</span></a> *<em class="structfield"><code><a name="GTrashStack.next"></a>next</code></em>;</p></td> <td class="struct_member_description"><p>pointer to the previous element of the stack, gets stored in the first <code class="literal">sizeof (gpointer)</code> bytes of the element</p></td> <td class="struct_member_annotations"> </td> </tr></tbody> </table></div> </div> </div> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.32</div> </body> </html>