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<h1>pp::CompletionCallbackWithOutput< T > Class Template Reference</h1>
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Inheritance diagram for pp::CompletionCallbackWithOutput< T >:</div>
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<p><a href="classpp_1_1_completion_callback_with_output-members.html">List of all members.</a></p>
<h2>
Public Types</h2><table class="memberdecls">
<tr><td class="memItemLeft" align="right" valign="top">typedef <br class="typebreak" />
internal::CallbackOutputTraits<br class="typebreak" />
< T >::StorageType </td><td class="memItemRight" valign="bottom"><a class="el" href="classpp_1_1_completion_callback_with_output.html#a333f3b00a9f6549b3b70291787f31459">OutputStorageType</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef <br class="typebreak" />
internal::CallbackOutputTraits<br class="typebreak" />
< T >::<a class="el" href="classpp_1_1_completion_callback_with_output.html#aca381518bda2f9cb12c4ddc725da91ce">APIArgType</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classpp_1_1_completion_callback_with_output.html#aca381518bda2f9cb12c4ddc725da91ce">APIArgType</a></td></tr>
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Public Member Functions</h2><table class="memberdecls">
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classpp_1_1_completion_callback_with_output.html#a29dd26e95218dce78e2475f29ea669cb">CompletionCallbackWithOutput</a> (<a class="el" href="classpp_1_1_completion_callback_with_output.html#a333f3b00a9f6549b3b70291787f31459">OutputStorageType</a> *<a class="el" href="classpp_1_1_completion_callback_with_output.html#a8fac51ce72828752c025ca888897f2ef">output</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classpp_1_1_completion_callback_with_output.html#a36bc9e5fd9e8d503020fe338b8b9802e">CompletionCallbackWithOutput</a> (PP_CompletionCallback_Func func, void *user_data, <a class="el" href="classpp_1_1_completion_callback_with_output.html#a333f3b00a9f6549b3b70291787f31459">OutputStorageType</a> *<a class="el" href="classpp_1_1_completion_callback_with_output.html#a8fac51ce72828752c025ca888897f2ef">output</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classpp_1_1_completion_callback_with_output.html#a311725af061d86e58cc89a588fa542f9">CompletionCallbackWithOutput</a> (PP_CompletionCallback_Func func, void *user_data, int32_t <a class="el" href="classpp_1_1_completion_callback.html#a60e466572fe7de362969dd41179c971f">flags</a>, <a class="el" href="classpp_1_1_completion_callback_with_output.html#a333f3b00a9f6549b3b70291787f31459">OutputStorageType</a> *<a class="el" href="classpp_1_1_completion_callback_with_output.html#a8fac51ce72828752c025ca888897f2ef">output</a>)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classpp_1_1_completion_callback_with_output.html#aca381518bda2f9cb12c4ddc725da91ce">APIArgType</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classpp_1_1_completion_callback_with_output.html#a8fac51ce72828752c025ca888897f2ef">output</a> () const </td></tr>
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<hr /><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><h3>template<typename T><br />
class pp::CompletionCallbackWithOutput< T ></h3>
<p>A <a class="el" href="classpp_1_1_completion_callback_with_output.html" title="A CompletionCallbackWithOutput defines a completion callback that additionally stores a pointer to so...">CompletionCallbackWithOutput</a> defines a completion callback that additionally stores a pointer to some output data. </p>
<p>Some C++ wrappers take a <a class="el" href="classpp_1_1_completion_callback_with_output.html" title="A CompletionCallbackWithOutput defines a completion callback that additionally stores a pointer to so...">CompletionCallbackWithOutput</a> when the browser is returning a bit of data as part of the function call. The "output" parameter stored in the <a class="el" href="classpp_1_1_completion_callback_with_output.html" title="A CompletionCallbackWithOutput defines a completion callback that additionally stores a pointer to so...">CompletionCallbackWithOutput</a> will receive the data from the browser.</p>
<p>You can create this yourself, but it is most common to use with the <a class="el" href="classpp_1_1_completion_callback_factory.html" title="CompletionCallbackFactory<T> may be used to create CompletionCallback objects that are bound to membe...">CompletionCallbackFactory</a>'s NewCallbackWithOutput, which manages the storage for the output parameter for you and passes it as an argument to your callback function.</p>
<p>Note that this class doesn't actually do anything with the output data, it just stores a pointer to it. C++ wrapper objects that accept a <a class="el" href="classpp_1_1_completion_callback_with_output.html" title="A CompletionCallbackWithOutput defines a completion callback that additionally stores a pointer to so...">CompletionCallbackWithOutput</a> will retrieve this pointer and pass it to the browser as the output parameter. </p>
</div><hr /><h2>Member Typedef Documentation</h2>
<a class="anchor" id="aca381518bda2f9cb12c4ddc725da91ce"></a><!-- doxytag: member="pp::CompletionCallbackWithOutput::APIArgType" ref="aca381518bda2f9cb12c4ddc725da91ce" args="" -->
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<td class="memname">typedef internal::CallbackOutputTraits<T>::<a class="el" href="classpp_1_1_completion_callback_with_output.html#aca381518bda2f9cb12c4ddc725da91ce">APIArgType</a> <a class="el" href="classpp_1_1_completion_callback_with_output.html">pp::CompletionCallbackWithOutput</a>< T >::<a class="el" href="classpp_1_1_completion_callback_with_output.html#aca381518bda2f9cb12c4ddc725da91ce">APIArgType</a></td>
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<td class="memname">typedef internal::CallbackOutputTraits<T>::StorageType <a class="el" href="classpp_1_1_completion_callback_with_output.html">pp::CompletionCallbackWithOutput</a>< T >::<a class="el" href="classpp_1_1_completion_callback_with_output.html#a333f3b00a9f6549b3b70291787f31459">OutputStorageType</a></td>
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<p>The type that will actually be stored in the completion callback. </p>
<p>In the common case, this will be equal to the template parameter (for example, CompletionCallbackWithOutput<int> would obviously take an int*. However, resources are passed as PP_Resource, vars as PP_Var, and arrays as our special ArrayOutputAdapter object. The CallbackOutputTraits defines specializations for all of these cases. </p>
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<hr /><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a29dd26e95218dce78e2475f29ea669cb"></a><!-- doxytag: member="pp::CompletionCallbackWithOutput::CompletionCallbackWithOutput" ref="a29dd26e95218dce78e2475f29ea669cb" args="(OutputStorageType *output)" -->
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<td class="memname"><a class="el" href="classpp_1_1_completion_callback_with_output.html">pp::CompletionCallbackWithOutput</a>< T >::<a class="el" href="classpp_1_1_completion_callback_with_output.html">CompletionCallbackWithOutput</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classpp_1_1_completion_callback_with_output.html#a333f3b00a9f6549b3b70291787f31459">OutputStorageType</a> * </td>
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<p>The default constructor will create a blocking <code><a class="el" href="classpp_1_1_completion_callback.html" title="This API enables you to implement and receive callbacks when Pepper operations complete asynchronousl...">CompletionCallback</a></code> that references the given output data. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<tr><td class="paramdir">[in]</td><td class="paramname">output</td><td>A pointer to the data associated with the callback. The caller must ensure that this pointer outlives the completion callback.</td></tr>
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<p><b>Note:</b> Blocking completion callbacks are only allowed from from background threads. </p>
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<td class="paramtype">PP_CompletionCallback_Func </td>
<td class="paramname"><em>func</em>, </td>
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<p>A constructor for creating a <code><a class="el" href="classpp_1_1_completion_callback.html" title="This API enables you to implement and receive callbacks when Pepper operations complete asynchronousl...">CompletionCallback</a></code> that references the given output data. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
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<tr><td class="paramdir">[in]</td><td class="paramname">func</td><td>The function to be called on completion. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">user_data</td><td>The user data to be passed to the callback function. This is optional and is typically used to help track state in case of multiple pending callbacks. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">output</td><td>A pointer to the data associated with the callback. The caller must ensure that this pointer outlives the completion callback. </td></tr>
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<a class="anchor" id="a311725af061d86e58cc89a588fa542f9"></a><!-- doxytag: member="pp::CompletionCallbackWithOutput::CompletionCallbackWithOutput" ref="a311725af061d86e58cc89a588fa542f9" args="(PP_CompletionCallback_Func func, void *user_data, int32_t flags, OutputStorageType *output)" -->
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<td class="paramname"><em>flags</em>, </td>
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<td class="paramname"><em>output</em> </td>
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<td></td><td><code> [inline]</code></td>
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<p>A constructor for creating a <code><a class="el" href="classpp_1_1_completion_callback.html" title="This API enables you to implement and receive callbacks when Pepper operations complete asynchronousl...">CompletionCallback</a></code> that references the given output data. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">func</td><td>The function to be called on completion.</td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">user_data</td><td>The user data to be passed to the callback function. This is optional and is typically used to help track state in case of multiple pending callbacks.</td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>Bit field combination of <code>PP_CompletionCallback_Flag</code> flags used to control how non-NULL callbacks are scheduled by asynchronous methods.</td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">output</td><td>A pointer to the data associated with the callback. The caller must ensure that this pointer outlives the completion callback. </td></tr>
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</dd>
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<hr /><h2>Member Function Documentation</h2>
<a class="anchor" id="a8fac51ce72828752c025ca888897f2ef"></a><!-- doxytag: member="pp::CompletionCallbackWithOutput::output" ref="a8fac51ce72828752c025ca888897f2ef" args="() const " -->
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<hr />The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="completion__callback_8h.html">completion_callback.h</a></li>
</ul>
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