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<li class="navelem"><a class="el" href="namespacecrashpad.html">crashpad</a></li><li class="navelem"><a class="el" href="classcrashpad_1_1Semaphore.html">Semaphore</a></li> </ul>
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<div class="header">
<div class="summary">
<a href="#pub-methods">Public Member Functions</a> &#124;
<a href="classcrashpad_1_1Semaphore-members.html">List of all members</a> </div>
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<div class="title">crashpad::Semaphore Class Reference</div> </div>
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<p>An anonymous in-process counting sempahore.
<a href="classcrashpad_1_1Semaphore.html#details">More...</a></p>
<p><code>#include &quot;util/synchronization/semaphore.h&quot;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:affe042d8a25991c90213370af5453010"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classcrashpad_1_1Semaphore.html#affe042d8a25991c90213370af5453010">Semaphore</a> (int value)</td></tr>
<tr class="memdesc:affe042d8a25991c90213370af5453010"><td class="mdescLeft">&#160;</td><td class="mdescRight">Initializes the semaphore. <a href="#affe042d8a25991c90213370af5453010">More...</a><br /></td></tr>
<tr class="separator:affe042d8a25991c90213370af5453010"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ade6db63246c9d6f3a36f3631b04c2bfd"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classcrashpad_1_1Semaphore.html#ade6db63246c9d6f3a36f3631b04c2bfd">Wait</a> ()</td></tr>
<tr class="memdesc:ade6db63246c9d6f3a36f3631b04c2bfd"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs the wait (or “procure”) operation on the semaphore. <a href="#ade6db63246c9d6f3a36f3631b04c2bfd">More...</a><br /></td></tr>
<tr class="separator:ade6db63246c9d6f3a36f3631b04c2bfd"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af22faf8672a7d7a6dd96aefc53560712"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classcrashpad_1_1Semaphore.html#af22faf8672a7d7a6dd96aefc53560712">TimedWait</a> (double seconds)</td></tr>
<tr class="memdesc:af22faf8672a7d7a6dd96aefc53560712"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs a timed wait (or “procure”) operation on the semaphore. <a href="#af22faf8672a7d7a6dd96aefc53560712">More...</a><br /></td></tr>
<tr class="separator:af22faf8672a7d7a6dd96aefc53560712"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2ca2f5c53cd11234dc765d2ec95b6c7a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classcrashpad_1_1Semaphore.html#a2ca2f5c53cd11234dc765d2ec95b6c7a">Signal</a> ()</td></tr>
<tr class="memdesc:a2ca2f5c53cd11234dc765d2ec95b6c7a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs the signal (or “post”) operation on the semaphore. <a href="#a2ca2f5c53cd11234dc765d2ec95b6c7a">More...</a><br /></td></tr>
<tr class="separator:a2ca2f5c53cd11234dc765d2ec95b6c7a"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>An anonymous in-process counting sempahore. </p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#affe042d8a25991c90213370af5453010">&sect;&nbsp;</a></span>Semaphore()</h2>
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<td class="memname">crashpad::Semaphore::Semaphore </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>value</em></td><td>)</td>
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<p>Initializes the semaphore. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">value</td><td>The initial value of the semaphore.</td></tr>
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</dd>
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<p>If the semaphore cannot be created, execution is terminated. </p>
</div>
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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a2ca2f5c53cd11234dc765d2ec95b6c7a">&sect;&nbsp;</a></span>Signal()</h2>
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<td class="memname">void crashpad::Semaphore::Signal </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<p>Performs the signal (or “post”) operation on the semaphore. </p>
<p>Atomically increments the value of the semaphore by 1. If the new value is 0, a caller blocked in <a class="el" href="classcrashpad_1_1Semaphore.html#ade6db63246c9d6f3a36f3631b04c2bfd" title="Performs the wait (or “procure”) operation on the semaphore. ">Wait()</a> will be awakened. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#af22faf8672a7d7a6dd96aefc53560712">&sect;&nbsp;</a></span>TimedWait()</h2>
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<td class="memname">bool crashpad::Semaphore::TimedWait </td>
<td>(</td>
<td class="paramtype">double&#160;</td>
<td class="paramname"><em>seconds</em></td><td>)</td>
<td></td>
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<p>Performs a timed wait (or “procure”) operation on the semaphore. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">seconds</td><td>The maximum number of seconds to wait for the operation to complete.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>false</code> if the wait timed out, <code>true</code> otherwise.</dd></dl>
<p>This method is simlar to <a class="el" href="classcrashpad_1_1Semaphore.html#ade6db63246c9d6f3a36f3631b04c2bfd" title="Performs the wait (or “procure”) operation on the semaphore. ">Wait()</a>, except that the amount of time that it blocks is limited. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ade6db63246c9d6f3a36f3631b04c2bfd">&sect;&nbsp;</a></span>Wait()</h2>
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<td class="memname">void crashpad::Semaphore::Wait </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
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<p>Performs the wait (or “procure”) operation on the semaphore. </p>
<p>Atomically decrements the value of the semaphore by 1. If the new value is negative, this function blocks and will not return until the semaphore’s value is incremented to 0 by <a class="el" href="classcrashpad_1_1Semaphore.html#a2ca2f5c53cd11234dc765d2ec95b6c7a" title="Performs the signal (or “post”) operation on the semaphore. ">Signal()</a>.</p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classcrashpad_1_1Semaphore.html#af22faf8672a7d7a6dd96aefc53560712" title="Performs a timed wait (or “procure”) operation on the semaphore. ">TimedWait()</a> </dd></dl>
</div>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li>util/synchronization/semaphore.h</li>
<li>util/synchronization/semaphore_mac.cc</li>
<li>util/synchronization/semaphore_posix.cc</li>
<li>util/synchronization/semaphore_win.cc</li>
</ul>
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