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Salvador Díaz Fau
117 lines
6.6 KiB
HTML
117 lines
6.6 KiB
HTML
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<title>cef4delphi: uCEFInterfaces: Interface ICefWaitableEvent</title>
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<span id="ICefWaitableEvent"></span><h1 class="cio">Interface ICefWaitableEvent</h1>
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<div class="sections">
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<div class="one_section"><a class="section" href="#PasDoc-Description">Description</a></div><div class="one_section"><a class="section" href="#PasDoc-Hierarchy">Hierarchy</a></div><div class="one_section"><a class="section" href="#PasDoc-Methods">Methods</a></div></div>
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<span id="PasDoc-Description"></span><h2 class="unit">Unit</h2>
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<p class="unitlink">
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<a href="uCEFInterfaces.html">uCEFInterfaces</a></p>
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<h2 class="declaration">Declaration</h2>
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<p class="declaration">
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<code>type ICefWaitableEvent = interface(<a class="normal" href="uCEFInterfaces.ICefBaseRefCounted.html">ICefBaseRefCounted</a>)</code></p>
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<h2 class="description">Description</h2>
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<p>
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WaitableEvent is a thread synchronization tool that allows one thread to wait for another thread to finish some work. This is equivalent to using a Lock+ConditionVariable to protect a simple boolean value. However, using WaitableEvent in conjunction with a Lock to wait for a more complex state change (e.g., for an item to be added to a queue) is not recommended. In that case consider using a ConditionVariable instead of a WaitableEvent. It is safe to create and/or signal a WaitableEvent from any thread. Blocking on a WaitableEvent by calling the *wait() functions is not allowed on the browser process UI or IO threads. </p>
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<p>
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<p>UNKNOWN
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<p><see href="<a href="https://bitbucket.org/chromiumembedded/cef/src/master/include/capi/cef_waitable_event_capi.h">https://bitbucket.org/chromiumembedded/cef/src/master/include/capi/cef_waitable_event_capi.h</a>">CEF source file: /include/capi/cef_waitable_event_capi.h (cef_waitable_event_t))</p>
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<span id="PasDoc-Hierarchy"></span><h2 class="hierarchy">Hierarchy</h2>
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<ul class="hierarchy"><li class="ancestor">IInterface</li>
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<li class="ancestor"><a class="normal" href="uCEFInterfaces.ICefBaseRefCounted.html">ICefBaseRefCounted</a></li>
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<li class="thisitem">ICefWaitableEvent</li></ul><h2 class="overview">Overview</h2>
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<span id="PasDoc-Methods"></span><h3 class="summary">Methods</h3>
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<table class="summary wide_list">
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<tr class="list visibility-public">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><code>procedure <strong><a href="uCEFInterfaces.ICefWaitableEvent.html#Reset">Reset</a></strong>;</code></td>
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</tr>
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<tr class="list2 visibility-public">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><code>procedure <strong><a href="uCEFInterfaces.ICefWaitableEvent.html#Signal">Signal</a></strong>;</code></td>
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</tr>
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<tr class="list visibility-public">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><code>function <strong><a href="uCEFInterfaces.ICefWaitableEvent.html#IsSignaled">IsSignaled</a></strong>: boolean;</code></td>
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</tr>
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<tr class="list2 visibility-public">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><code>procedure <strong><a href="uCEFInterfaces.ICefWaitableEvent.html#Wait">Wait</a></strong>;</code></td>
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</tr>
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<tr class="list visibility-public">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><code>function <strong><a href="uCEFInterfaces.ICefWaitableEvent.html#TimedWait-int64-">TimedWait</a></strong>(max_ms: int64): boolean;</code></td>
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</tr>
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</table>
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<h2 class="description">Description</h2>
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<h3 class="detail">Methods</h3>
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<table class="detail visibility-public wide_list">
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<tr class="list visibility-public">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><span id="Reset"></span><code>procedure <strong>Reset</strong>;</code></td>
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</tr>
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<tr><td colspan="2">
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<p>
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Put the event in the un-signaled state. </p>
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<h6 class="description_section">Attributes</h6>
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<dl class="attributes">
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<dt>GUID['{965C90C9-3DAE-457F-AA64-E04FF508094A}']</dt>
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<dd></dd>
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</dl>
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</td></tr>
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<table class="detail visibility-public wide_list">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><span id="Signal"></span><code>procedure <strong>Signal</strong>;</code></td>
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</tr>
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<tr><td colspan="2">
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<p>
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Put the event in the signaled state. This causes any thread blocked on Wait to be woken up. </p>
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</td></tr>
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</table>
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<table class="detail visibility-public wide_list">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><span id="IsSignaled"></span><code>function <strong>IsSignaled</strong>: boolean;</code></td>
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</tr>
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<tr><td colspan="2">
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<p>
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Returns true (1) if the event is in the signaled state, else false (0). If the event was created with |automatic_reset| set to true (1) then calling this function will also cause a reset. </p>
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</td></tr>
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</table>
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<table class="detail visibility-public wide_list">
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<tr class="list visibility-public">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><span id="Wait"></span><code>procedure <strong>Wait</strong>;</code></td>
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</tr>
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<tr><td colspan="2">
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<p>
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Wait indefinitely for the event to be signaled. This function will not return until after the call to signal() has completed. This function cannot be called on the browser process UI or IO threads. </p>
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</td></tr>
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</table>
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<table class="detail visibility-public wide_list">
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<tr class="list visibility-public">
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<td class="visibility"><span class="badge vis-public">Public</span></td>
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<td class="itemcode"><span id="TimedWait-int64-"></span><code>function <strong>TimedWait</strong>(max_ms: int64): boolean;</code></td>
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</tr>
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<tr><td colspan="2">
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<p>
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Wait up to |max_ms| milliseconds for the event to be signaled. Returns true (1) if the event was signaled. A return value of false (0) does not necessarily mean that |max_ms| was exceeded. This function will not return until after the call to signal() has completed. This function cannot be called on the browser process UI or IO threads. </p>
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</td></tr>
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</table>
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