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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 `set_logger_raw` fn in crate `log`."><meta name="keywords" content="rust, rustlang, rust-lang, set_logger_raw"><title>log::set_logger_raw - 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="https://www.rust-lang.org/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='../log/index.html'><div class='logo-container'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo'></div></a><div class="sidebar-elems"><p class='location'><a href='index.html'>log</a></p><script>window.sidebarCurrent = {name: 'set_logger_raw', 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 js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" 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/log/lib.rs.html#728-739' title='goto source code'>[src]</a></span><span class='in-band'>Function <a href='index.html'>log</a>::<wbr><a class="fn" href=''>set_logger_raw</a></span></h1><pre class='rust fn'>pub unsafe fn set_logger_raw<M>(make_logger: M) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../log/struct.SetLoggerError.html" title="struct log::SetLoggerError">SetLoggerError</a>> <span class="where fmt-newline">where<br> M: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="struct" href="../log/struct.MaxLogLevelFilter.html" title="struct log::MaxLogLevelFilter">MaxLogLevelFilter</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*const </a>dyn <a class="trait" href="../log/trait.Log.html" title="trait log::Log">Log</a>, </span></pre><div class='docblock'><p>Sets the global logger from a raw pointer.</p>
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<p>This function is similar to <code>set_logger</code> except that it is usable in
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<code>no_std</code> code.</p>
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<p>The <code>make_logger</code> closure is passed a <code>MaxLogLevel</code> object, which the
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logger should use to keep the global maximum log level in sync with the
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highest log level that the logger will not ignore.</p>
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<p>This function may only be called once in the lifetime of a program. Any log
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events that occur before the call to <code>set_logger_raw</code> completes will be
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ignored.</p>
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<p>This function does not typically need to be called manually. Logger
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implementations should provide an initialization method that calls
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<code>set_logger_raw</code> internally.</p>
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<h1 id="safety" class="section-header"><a href="#safety">Safety</a></h1>
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<p>The pointer returned by <code>make_logger</code> must remain valid for the entire
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duration of the program or until <code>shutdown_logger_raw</code> is called. In
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addition, <code>shutdown_logger</code> <em>must not</em> be called after this function.</p>
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