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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `SDL_SetAssertionHandler` fn in crate `sdl2_sys`."><meta name="keywords" content="rust, rustlang, rust-lang, SDL_SetAssertionHandler"><title>sdl2_sys::SDL_SetAssertionHandler - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="shortcut icon" href="../favicon.ico"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../sdl2_sys/index.html'><div class='logo-container'><img src='../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class='location'><a href='index.html'>sdl2_sys</a></p><script>window.sidebarCurrent = {name: 'SDL_SetAssertionHandler', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../src/sdl2_sys/Users/travis/build/Rust-SDL2/rust-sdl2/target/debug/build/sdl2-sys-f32779682524d647/out/sdl_bindings.rs.html#1690' title='goto source code'>[src]</a></span><span class='in-band'>Function <a href='index.html'>sdl2_sys</a>::<wbr><a class="fn" href=''>SDL_SetAssertionHandler</a></span></h1><pre class='rust fn'>pub unsafe extern "C" fn SDL_SetAssertionHandler(<br> handler: <a class="type" href="../sdl2_sys/type.SDL_AssertionHandler.html" title="type sdl2_sys::SDL_AssertionHandler">SDL_AssertionHandler</a>, <br> userdata: *mut <a class="enum" href="https://doc.rust-lang.org/nightly/core/ffi/enum.c_void.html" title="enum core::ffi::c_void">c_void</a><br>)</pre><div class='docblock'><p>\brief Set an application-defined assertion handler.</p>
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<p>This allows an app to show its own assertion UI and/or force the
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response to an assertion failure. If the app doesn't provide this, SDL
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will try to do the right thing, popping up a system-specific GUI dialog,
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and probably minimizing any fullscreen windows.</p>
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<p>This callback may fire from any thread, but it runs wrapped in a mutex, so
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it will only fire from one thread at a time.</p>
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<p>Setting the callback to NULL restores SDL's original internal handler.</p>
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<p>This callback is NOT reset to SDL's internal handler upon SDL_Quit()!</p>
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<p>Return SDL_AssertState value of how to handle the assertion failure.</p>
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<p>\param handler Callback function, called when an assertion fails.
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\param userdata A pointer passed to the callback as-is.</p>
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