86 lines
5.5 KiB
HTML
86 lines
5.5 KiB
HTML
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<title>std::basic_streambuf<CharT,Traits>::pubsync, std::basic_streambuf<CharT,Traits>::sync</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_io_basic_streambuf_pubsync skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::basic_streambuf<CharT,Traits>::</span>pubsync, <span style="font-size:0.7em; line-height:130%">std::basic_streambuf<CharT,Traits>::</span>sync</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-io.html">io</a>‎ | <a href="cpp-io-basic_streambuf.html">basic streambuf</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span> pubsync<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(1)</td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">protected</span><span class="sy4">:</span><br />
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<span class="kw1">virtual</span> <span class="kw4">int</span> sync<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(2)</td>
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<td></td>
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<td></td>
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<td></td>
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<p>同步受控制字符序列（缓冲区）与关联字符序列。</p>
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<p>1) 调用最终导出类的 <code>sync()</code></p>
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<p>2) 此函数的基类版本无效果。导出类可覆写此函数以允许将底层设备与缓冲区同步。</p>
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<p>对于输出流，这典型地导致写入放置区的内容到关联序列中，即冲入输出缓冲区。对于输入流，这典型地清空获取区并从关联序列重读取，以拾取最近的更改。默认行为（例如 <span class="t-lc"><a href="cpp-io-basic_stringbuf.html">std::basic_stringbuf</a></span> 中找到者）不会做任何事。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<p>（无）</p>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<p>1) <code>sync()</code> 的返回值。</p>
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<p>2) 成功时返回 <span class="t-c"><span class="mw-geshi cpp source-cpp">​<span class="nu0">0</span>​</span></span> ，否则返回 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">-</span><span class="nu0">1</span></span></span> 。基类版本返回 <span class="t-c"><span class="mw-geshi cpp source-cpp">​<span class="nu0">0</span>​</span></span> 。</p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<td class="mbox-text" style="">本节未完成<br />
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原因：暂无示例</td>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div><a href="cpp-io-basic_istream-sync.html"><span class="t-lines"><span>sync</span></span></a></div>
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</td>
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<td>与底层存储设备同步<br />
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<span class="t-mark">(<code>std::basic_istream<CharT,Traits></code> 的公开成员函数)</span></td>
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<div><a href="cpp-io-basic_filebuf-sync.html"><span class="t-lines"><span>sync</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-cmark">[虚]</span></span></span></div>
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</div>
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</td>
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<td>从放置区写字符到关联文件<br />
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<span class="t-mark">(<code>std::basic_filebuf<CharT,Traits></code> 的虚受保护成员函数)</span></td>
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