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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">&#26631;&#20934;&#24211;&#22836;&#25991;&#20214;</span> &lt;shared_mutex&gt;</h1>
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<div><a href="cpp-thread-shared_mutex.html"><span class="t-lines"><span>shared_mutex</span></span></a></div>
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<div><a href="cpp-thread-shared_lock-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::shared_lock)</span></span></span></a></div>
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<td><span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#23545; <code>shared_lock</code> &#30340;&#29305;&#21270;<br />
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">class</span> shared_mutex<span class="sy4">;</span>
<span class="kw1">class</span> shared_timed_mutex<span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Mutex<span class="sy1">&gt;</span> <span class="kw1">class</span> shared_lock<span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Mutex<span class="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>shared_lock<span class="sy1">&lt;</span>Mutex<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, shared_lock<span class="sy1">&lt;</span>Mutex<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::shared_mutex">&#31867; <span class="t-lc"><a href="cpp-thread-shared_mutex.html">std::shared_mutex</a></span></span></h4>
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<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">class</span> shared_mutex <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
shared_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
~shared_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
shared_mutex<span class="br0">(</span><span class="kw4">const</span> shared_mutex<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
shared_mutex<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> shared_mutex<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="co1">// &#25490;&#20182;&#24615;&#25152;&#26377;&#26435;</span>
<span class="kw4">void</span> lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#38459;&#22622;</span>
<span class="kw4">bool</span> try_lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> unlock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#20849;&#20139;&#25152;&#26377;&#26435;</span>
<span class="kw4">void</span> lock_shared<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#38459;&#22622;</span>
<span class="kw4">bool</span> try_lock_shared<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> unlock_shared<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">using</span> native_handle_type <span class="sy1">=</span> <span class="coMULTI">/* &#30001;&#23454;&#29616;&#23450;&#20041; */</span><span class="sy4">;</span>
native_handle_type native_handle<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::shared_timed_mutex">&#31867; <span class="t-lc"><a href="cpp-thread-shared_timed_mutex.html">std::shared_timed_mutex</a></span></span></h4>
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<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">class</span> shared_timed_mutex <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
shared_timed_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
~shared_timed_mutex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
shared_timed_mutex<span class="br0">(</span><span class="kw4">const</span> shared_timed_mutex<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
shared_timed_mutex<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> shared_timed_mutex<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
<span class="co1">// &#25490;&#20182;&#24615;&#25152;&#26377;&#26435;</span>
<span class="kw4">void</span> lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#38459;&#22622;</span>
<span class="kw4">bool</span> try_lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Rep, <span class="kw1">class</span> Period<span class="sy1">&gt;</span>
<span class="kw4">bool</span> try_lock_for<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">duration</span><span class="sy1">&lt;</span>Rep, Period<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rel_time<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Clock, <span class="kw1">class</span> Duration<span class="sy1">&gt;</span>
<span class="kw4">bool</span> try_lock_until<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">time_point</span><span class="sy1">&lt;</span>Clock, Duration<span class="sy1">&gt;</span><span class="sy3">&amp;</span> abs_time<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> unlock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#20849;&#20139;&#25152;&#26377;&#26435;</span>
<span class="kw4">void</span> lock_shared<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#38459;&#22622;</span>
<span class="kw4">bool</span> try_lock_shared<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Rep, <span class="kw1">class</span> Period<span class="sy1">&gt;</span>
<span class="kw4">bool</span> try_lock_shared_for<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">duration</span><span class="sy1">&lt;</span>Rep, Period<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rel_time<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Clock, <span class="kw1">class</span> Duration<span class="sy1">&gt;</span>
<span class="kw4">bool</span> try_lock_shared_until<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">time_point</span><span class="sy1">&lt;</span>Clock, Duration<span class="sy1">&gt;</span><span class="sy3">&amp;</span> abs_time<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> unlock_shared<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::shared_lock">&#31867;&#27169;&#26495; <span class="t-lc"><a href="cpp-thread-shared_lock.html">std::shared_lock</a></span></span></h4>
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Mutex<span class="sy1">&gt;</span>
<span class="kw1">class</span> shared_lock <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> mutex_type <span class="sy1">=</span> Mutex<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;/&#22797;&#21046;/&#26512;&#26500;</span>
shared_lock<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">explicit</span> shared_lock<span class="br0">(</span>mutex_type<span class="sy3">&amp;</span> m<span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#38459;&#22622;</span>
shared_lock<span class="br0">(</span>mutex_type<span class="sy3">&amp;</span> m, defer_lock_t<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
shared_lock<span class="br0">(</span>mutex_type<span class="sy3">&amp;</span> m, try_to_lock_t<span class="br0">)</span><span class="sy4">;</span>
shared_lock<span class="br0">(</span>mutex_type<span class="sy3">&amp;</span> m, adopt_lock_t<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Clock, <span class="kw1">class</span> Duration<span class="sy1">&gt;</span>
shared_lock<span class="br0">(</span>mutex_type<span class="sy3">&amp;</span> m, <span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">time_point</span><span class="sy1">&lt;</span>Clock, Duration<span class="sy1">&gt;</span><span class="sy3">&amp;</span> abs_time<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Rep, <span class="kw1">class</span> Period<span class="sy1">&gt;</span>
shared_lock<span class="br0">(</span>mutex_type<span class="sy3">&amp;</span> m, <span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">duration</span><span class="sy1">&lt;</span>Rep, Period<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rel_time<span class="br0">)</span><span class="sy4">;</span>
~shared_lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
shared_lock<span class="br0">(</span><span class="kw4">const</span> shared_lock<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
shared_lock<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> shared_lock<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
shared_lock<span class="br0">(</span>shared_lock<span class="sy3">&amp;&amp;</span> u<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
shared_lock<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>shared_lock<span class="sy3">&amp;&amp;</span> u<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#38145;&#23450;</span>
<span class="kw4">void</span> lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#38459;&#22622;</span>
<span class="kw4">bool</span> try_lock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Rep, <span class="kw1">class</span> Period<span class="sy1">&gt;</span>
<span class="kw4">bool</span> try_lock_for<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">duration</span><span class="sy1">&lt;</span>Rep, Period<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rel_time<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Clock, <span class="kw1">class</span> Duration<span class="sy1">&gt;</span>
<span class="kw4">bool</span> try_lock_until<span class="br0">(</span><span class="kw4">const</span> chrono<span class="sy4">::</span><span class="me2">time_point</span><span class="sy1">&lt;</span>Clock, Duration<span class="sy1">&gt;</span><span class="sy3">&amp;</span> abs_time<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> unlock<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#20462;&#25913;&#22120;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>shared_lock<span class="sy3">&amp;</span> u<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
mutex_type<span class="sy2">*</span> release<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="co1">// &#35266;&#23519;&#22120;</span>
<span class="kw4">bool</span> owns_lock<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">explicit</span> operator <span class="kw4">bool</span> <span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
mutex_type<span class="sy2">*</span> mutex<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
mutex_type<span class="sy2">*</span> pm<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<span class="kw4">bool</span> owns<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Mutex<span class="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>shared_lock<span class="sy1">&lt;</span>Mutex<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x, shared_lock<span class="sy1">&lt;</span>Mutex<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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