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| <h1 class='fqn'><span class='in-band'>Type Definition <a href='index.html'>paho_mqtt3as_sys</a>::<wbr><a class="type" href=''>MQTTAsync_onFailure</a></span><span class='out-of-band'><span id='render-detail'> |
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| <pre class='rust typedef'>type MQTTAsync_onFailure = <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><unsafe extern "C" fn(_: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*mut </a><a class="enum" href="https://doc.rust-lang.org/nightly/std/os/raw/enum.c_void.html" title="enum std::os::raw::c_void">c_void</a>, _: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*mut </a><a class="struct" href="../paho_mqtt3as_sys/struct.MQTTAsync_failureData.html" title="struct paho_mqtt3as_sys::MQTTAsync_failureData">MQTTAsync_failureData</a>)>;</pre><div class='docblock'><p>This is a callback function. The client application |
| must provide an implementation of this function to enable asynchronous |
| notification of the unsuccessful completion of an API call. The function is |
| registered with the client library by passing it as an argument in |
| ::MQTTAsync_responseOptions. |
| @param context A pointer to the <i>context</i> value originally passed to |
| ::MQTTAsync_responseOptions, which contains any application-specific context. |
| @param response Any failure data associated with the API completion.</p> |
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