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default_user_allocator_new_delete.html

default_user_allocator_new_delete.html 7.3 KB
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  26. <a name="boost.default_user_allocator_new_delete"></a><div class="titlepage"></div>
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  28. <h2><span class="refentrytitle">Struct default_user_allocator_new_delete</span></h2>
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  29. <p>boost::default_user_allocator_new_delete &#8212; Allocator used as the default template parameter for a <a href="../boost_pool/pool/pooling.html#boost_pool.pool.pooling.user_allocator" target="_top">UserAllocator</a> template parameter. Uses new and delete. </p>
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  31. <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
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  32. <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../header/boost/pool/pool_hpp.html" title="Header &lt;boost/pool/pool.hpp&gt;">boost/pool/pool.hpp</a>&gt;
    33. 

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    35. 

  35. <span class="keyword">struct</span> <a class="link" href="default_user_allocator_new_delete.html" title="Struct default_user_allocator_new_delete">default_user_allocator_new_delete</a> <span class="special">{</span>
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  36.   <span class="comment">// types</span>
    37. 

  37.   <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span>    <a name="boost.default_user_allocator_new_delete.size_type"></a><span class="identifier">size_type</span><span class="special">;</span>        <span class="comment">// An unsigned integral type that can represent the size of the largest object to be allocated. </span>
    38. 

  38.   <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">ptrdiff_t</span> <a name="boost.default_user_allocator_new_delete.difference_type"></a><span class="identifier">difference_type</span><span class="special">;</span>  <span class="comment">// A signed integral type that can represent the difference of any two pointers. </span>
    39. 

  39. 

  40.   <span class="comment">// <a class="link" href="default_user_allocator_new_delete.html#idm45952513177584-bb">public static functions</a></span>
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  41.   <span class="keyword">static</span> <span class="keyword">char</span> <span class="special">*</span> <a class="link" href="default_user_allocator_new_delete.html#idm45952513177024-bb"><span class="identifier">malloc</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">size_type</span><span class="special">)</span><span class="special">;</span>
    42. 

  42.   <span class="keyword">static</span> <span class="keyword">void</span> <a class="link" href="default_user_allocator_new_delete.html#idm45952513174832-bb"><span class="identifier">free</span></a><span class="special">(</span><span class="keyword">char</span> <span class="special">*</span><span class="keyword">const</span><span class="special">)</span><span class="special">;</span>
    43. 

  43. <span class="special">}</span><span class="special">;</span></pre></div>
    44. 

  44. <div class="refsect1">
    45. 

  45. <a name="idm46381014102160"></a><h2>Description</h2>
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  46. <div class="refsect2">
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  47. <a name="idm46381014101776"></a><h3>
    48. 

  48. <a name="idm45952513177584-bb"></a><code class="computeroutput">default_user_allocator_new_delete</code> public static functions</h3>
    49. 

  49. <div class="orderedlist"><ol class="orderedlist" type="1">
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  50. <li class="listitem">
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  51. <pre class="literallayout"><span class="keyword">static</span> <span class="keyword">char</span> <span class="special">*</span> <a name="idm45952513177024-bb"></a><span class="identifier">malloc</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">size_type</span> bytes<span class="special">)</span><span class="special">;</span></pre>
    52. 

  52. <p>Attempts to allocate n bytes from the system. Returns 0 if out-of-memory </p>
    53. 

  53. </li>
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  54. <li class="listitem">
    55. 

  55. <pre class="literallayout"><span class="keyword">static</span> <span class="keyword">void</span> <a name="idm45952513174832-bb"></a><span class="identifier">free</span><span class="special">(</span><span class="keyword">char</span> <span class="special">*</span><span class="keyword">const</span> block<span class="special">)</span><span class="special">;</span></pre>
    56. 

  56. <p>Attempts to de-allocate block. 
    57. 

  57. </p>
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  64. <td><p><span class="term">Requires:</span></p></td>
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  65. <td><p>Block must have been previously returned from a call to UserAllocator::malloc. </p></td>
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  75. <td align="right"><div class="copyright-footer">Copyright &#169; 2000-2006 Stephen Cleary<br>Copyright &#169; 2011 Paul A. Bristow<p>
    76. 

  76.         Distributed under the Boost Software License, Version 1.0. (See accompanying
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  77.         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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