154 lines
7.1 KiB
HTML
154 lines
7.1 KiB
HTML
<!DOCTYPE html>
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>低层内存管理</title>
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<link rel="stylesheet" href="ext.css" />
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<link rel="stylesheet" href="site_modules.css" />
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</head>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_memory_new skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading">低层内存管理</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-memory.html">memory</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<p><a href="cpp-language-new.html">new 表达式</a>是创建拥有动态存储期对象或对象数组的仅有方式，即它们拥有不受制于创建所它们在的作用域的生存期。 new 表达式通过调用分配函数获得存储。 <a href="cpp-language-delete.html">delete 表达式</a>销毁最终导出对象或通过 new 表达式创造的数组，然后调用解分配函数。默认分配函数和默认解分配函数，及与之关联的函数、类型及对象声明于头文件 <code><new></code> 。</p>
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<table class="t-dsc-begin">
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<tr class="t-dsc-header">
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<td colspan="2">
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<div>定义于头文件 <code><a href="cpp-header-new.html"><new></a></code></div>
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</td>
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</tr>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E5.87.BD.E6.95.B0">函数</span></h5>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-operator_new.html"><span class="t-lines"><span>operator new</span><span>operator new[]</span></span></a></div>
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</div>
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</td>
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<td>分配函数<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-operator_delete.html"><span class="t-lines"><span>operator delete</span><span>operator delete[]</span></span></a></div>
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</div>
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</td>
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<td>解分配函数<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-get_new_handler.html"><span class="t-lines"><span>get_new_handler</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>获得当前的 new 处理函数<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-set_new_handler.html"><span class="t-lines"><span>set_new_handler</span></span></a></div>
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</div>
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</td>
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<td>注册一个 new 处理函数<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E7.B1.BB">类</span></h5>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-bad_alloc.html"><span class="t-lines"><span>bad_alloc</span></span></a></div>
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</div>
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</td>
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<td>内存分配失败时抛出的异常<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-bad_array_new_length.html"><span class="t-lines"><span>bad_array_new_length</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>在分配有非法长度的数组时抛出的异常<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-nothrow_t.html"><span class="t-lines"><span>nothrow_t</span></span></a></div>
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</div>
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</td>
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<td>用于选择不抛出<i>分配函数</i>的标签类型<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-align_val_t.html"><span class="t-lines"><span>align_val_t</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</div>
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</td>
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<td>用于向带对齐分配及解分配函数传递对齐值的类型<br />
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<span class="t-mark">(枚举)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-destroying_delete_t.html"><span class="t-lines"><span>destroying_delete_t</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
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</div>
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</td>
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<td>用于鉴别 operator delete 的销毁删除重载的标签类型<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E7.B1.BB.E5.9E.8B">类型</span></h5>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-new_handler.html"><span class="t-lines"><span>new_handler</span></span></a></div>
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</div>
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</td>
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<td>new 处理函数的函数指针类型<br />
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<span class="t-mark">(typedef)</span></td>
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</tr>
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<tr>
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<td colspan="2">
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<h5><span class="mw-headline" id=".E5.AF.B9.E8.B1.A1">对象</span></h5>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-new-nothrow.html"><span class="t-lines"><span>nothrow</span></span></a></div>
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</div>
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</td>
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<td>用于选择不抛出<i>分配函数</i>的 <code>nothrow_t</code> 类型对象<br />
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<span class="t-mark">(常量)</span></td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</html>
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