<!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="Source to the Rust file `/home/mrh/source/vulkano/vulkano/src/sync/fence.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>fence.rs.html -- source</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 source"><!--[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='../../../vulkano/index.html'><div class='logo-container'><img src='https://raw.githubusercontent.com/vulkano-rs/vulkano/master/logo.png' alt='logo'></div></a></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"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><div class="example-wrap"><pre class="rust ">
<span class="comment">// Copyright (c) 2016 The vulkano developers</span>
<span class="comment">// Licensed under the Apache License, Version 2.0</span>
<span class="comment">// <LICENSE-APACHE or</span>
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT</span>
<span class="comment">// license <LICENSE-MIT or http://opensource.org/licenses/MIT>,</span>
<span class="comment">// at your option. All files in the project carrying such</span>
<span class="comment">// notice may not be copied, modified, or distributed except</span>
<span class="comment">// according to those terms.</span>
<span class="kw">use</span> <span class="ident">smallvec</span>::<span class="ident">SmallVec</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">error</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ptr</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">Arc</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">AtomicBool</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>::<span class="ident">Ordering</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::<span class="ident">Duration</span>;
<span class="kw">use</span> <span class="ident">Error</span>;
<span class="kw">use</span> <span class="ident">OomError</span>;
<span class="kw">use</span> <span class="ident">SafeDeref</span>;
<span class="kw">use</span> <span class="ident">Success</span>;
<span class="kw">use</span> <span class="ident">VulkanObject</span>;
<span class="kw">use</span> <span class="ident">check_errors</span>;
<span class="kw">use</span> <span class="ident">device</span>::<span class="ident">Device</span>;
<span class="kw">use</span> <span class="ident">device</span>::<span class="ident">DeviceOwned</span>;
<span class="kw">use</span> <span class="ident">vk</span>;
<span class="doccomment">/// A fence is used to know when a command buffer submission has finished its execution.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When a command buffer accesses a resource, you have to ensure that the CPU doesn't access</span>
<span class="doccomment">/// the same resource simultaneously (except for concurrent reads). Therefore in order to know</span>
<span class="doccomment">/// when the CPU can access a resource again, a fence has to be used.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span> <span class="op">=</span> <span class="ident">Arc</span><span class="op"><</span><span class="ident">Device</span><span class="op">></span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">SafeDeref</span><span class="op"><</span><span class="ident">Target</span> <span class="op">=</span> <span class="ident">Device</span><span class="op">></span>
{
<span class="ident">fence</span>: <span class="ident">vk</span>::<span class="ident">Fence</span>,
<span class="ident">device</span>: <span class="ident">D</span>,
<span class="comment">// If true, we know that the `Fence` is signaled. If false, we don't know.</span>
<span class="comment">// This variable exists so that we don't need to call `vkGetFenceStatus` or `vkWaitForFences`</span>
<span class="comment">// multiple times.</span>
<span class="ident">signaled</span>: <span class="ident">AtomicBool</span>,
<span class="comment">// Indicates whether this fence was taken from the fence pool.</span>
<span class="comment">// If true, will be put back into fence pool on drop.</span>
<span class="ident">must_put_in_pool</span>: <span class="ident">bool</span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">SafeDeref</span><span class="op"><</span><span class="ident">Target</span> <span class="op">=</span> <span class="ident">Device</span><span class="op">></span>
{
<span class="doccomment">/// Takes a fence from the vulkano-provided fence pool.</span>
<span class="doccomment">/// If the pool is empty, a new fence will be allocated.</span>
<span class="doccomment">/// Upon `drop`, the fence is put back into the pool.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// For most applications, using the fence pool should be preferred,</span>
<span class="doccomment">/// in order to avoid creating new fences every frame.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_pool</span>(<span class="ident">device</span>: <span class="ident">D</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>, <span class="ident">OomError</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">maybe_raw_fence</span> <span class="op">=</span> <span class="ident">device</span>.<span class="ident">fence_pool</span>().<span class="ident">lock</span>().<span class="ident">unwrap</span>().<span class="ident">pop</span>();
<span class="kw">match</span> <span class="ident">maybe_raw_fence</span> {
<span class="prelude-val">Some</span>(<span class="ident">raw_fence</span>) <span class="op">=</span><span class="op">></span> {
<span class="kw">unsafe</span> {
<span class="comment">// Make sure the fence isn't signaled</span>
<span class="kw">let</span> <span class="ident">vk</span> <span class="op">=</span> <span class="ident">device</span>.<span class="ident">pointers</span>();
<span class="ident">check_errors</span>(<span class="ident">vk</span>.<span class="ident">ResetFences</span>(<span class="ident">device</span>.<span class="ident">internal_object</span>(), <span class="number">1</span>, <span class="kw-2">&</span><span class="ident">raw_fence</span>))<span class="question-mark">?</span>;
}
<span class="prelude-val">Ok</span>(<span class="ident">Fence</span> {
<span class="ident">fence</span>: <span class="ident">raw_fence</span>,
<span class="ident">device</span>: <span class="ident">device</span>,
<span class="ident">signaled</span>: <span class="ident">AtomicBool</span>::<span class="ident">new</span>(<span class="bool-val">false</span>),
<span class="ident">must_put_in_pool</span>: <span class="bool-val">true</span>,
})
},
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> {
<span class="comment">// Pool is empty, alloc new fence</span>
<span class="ident">Fence</span>::<span class="ident">alloc_impl</span>(<span class="ident">device</span>, <span class="bool-val">false</span>, <span class="bool-val">true</span>)
},
}
}
<span class="doccomment">/// Builds a new fence.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">alloc</span>(<span class="ident">device</span>: <span class="ident">D</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>, <span class="ident">OomError</span><span class="op">></span> {
<span class="ident">Fence</span>::<span class="ident">alloc_impl</span>(<span class="ident">device</span>, <span class="bool-val">false</span>, <span class="bool-val">false</span>)
}
<span class="doccomment">/// Builds a new fence in signaled state.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">alloc_signaled</span>(<span class="ident">device</span>: <span class="ident">D</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>, <span class="ident">OomError</span><span class="op">></span> {
<span class="ident">Fence</span>::<span class="ident">alloc_impl</span>(<span class="ident">device</span>, <span class="bool-val">true</span>, <span class="bool-val">false</span>)
}
<span class="kw">fn</span> <span class="ident">alloc_impl</span>(<span class="ident">device</span>: <span class="ident">D</span>, <span class="ident">signaled</span>: <span class="ident">bool</span>, <span class="ident">must_put_in_pool</span>: <span class="ident">bool</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>, <span class="ident">OomError</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">fence</span> <span class="op">=</span> <span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">infos</span> <span class="op">=</span> <span class="ident">vk</span>::<span class="ident">FenceCreateInfo</span> {
<span class="ident">sType</span>: <span class="ident">vk</span>::<span class="ident">STRUCTURE_TYPE_FENCE_CREATE_INFO</span>,
<span class="ident">pNext</span>: <span class="ident">ptr</span>::<span class="ident">null</span>(),
<span class="ident">flags</span>: <span class="kw">if</span> <span class="ident">signaled</span> {
<span class="ident">vk</span>::<span class="ident">FENCE_CREATE_SIGNALED_BIT</span>
} <span class="kw">else</span> {
<span class="number">0</span>
},
};
<span class="kw">let</span> <span class="ident">vk</span> <span class="op">=</span> <span class="ident">device</span>.<span class="ident">pointers</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">output</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">uninitialized</span>();
<span class="ident">check_errors</span>(<span class="ident">vk</span>.<span class="ident">CreateFence</span>(<span class="ident">device</span>.<span class="ident">internal_object</span>(),
<span class="kw-2">&</span><span class="ident">infos</span>,
<span class="ident">ptr</span>::<span class="ident">null</span>(),
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">output</span>))<span class="question-mark">?</span>;
<span class="ident">output</span>
};
<span class="prelude-val">Ok</span>(<span class="ident">Fence</span> {
<span class="ident">fence</span>: <span class="ident">fence</span>,
<span class="ident">device</span>: <span class="ident">device</span>,
<span class="ident">signaled</span>: <span class="ident">AtomicBool</span>::<span class="ident">new</span>(<span class="ident">signaled</span>),
<span class="ident">must_put_in_pool</span>: <span class="ident">must_put_in_pool</span>,
})
}
<span class="doccomment">/// Returns true if the fence is signaled.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ready</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">bool</span>, <span class="ident">OomError</span><span class="op">></span> {
<span class="kw">unsafe</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">signaled</span>.<span class="ident">load</span>(<span class="ident">Ordering</span>::<span class="ident">Relaxed</span>) {
<span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="bool-val">true</span>);
}
<span class="kw">let</span> <span class="ident">vk</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">device</span>.<span class="ident">pointers</span>();
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">check_errors</span>(<span class="ident">vk</span>.<span class="ident">GetFenceStatus</span>(<span class="self">self</span>.<span class="ident">device</span>.<span class="ident">internal_object</span>(),
<span class="self">self</span>.<span class="ident">fence</span>))<span class="question-mark">?</span>;
<span class="kw">match</span> <span class="ident">result</span> {
<span class="ident">Success</span>::<span class="ident">Success</span> <span class="op">=</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">signaled</span>.<span class="ident">store</span>(<span class="bool-val">true</span>, <span class="ident">Ordering</span>::<span class="ident">Relaxed</span>);
<span class="prelude-val">Ok</span>(<span class="bool-val">true</span>)
},
<span class="ident">Success</span>::<span class="ident">NotReady</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">Ok</span>(<span class="bool-val">false</span>),
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
}
}
}
<span class="doccomment">/// Waits until the fence is signaled, or at least until the timeout duration has elapsed.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns `Ok` if the fence is now signaled. Returns `Err` if the timeout was reached instead.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If you pass a duration of 0, then the function will return without blocking.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">wait</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">timeout</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">FenceWaitError</span><span class="op">></span> {
<span class="kw">unsafe</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">signaled</span>.<span class="ident">load</span>(<span class="ident">Ordering</span>::<span class="ident">Relaxed</span>) {
<span class="kw">return</span> <span class="prelude-val">Ok</span>(());
}
<span class="kw">let</span> <span class="ident">timeout_ns</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">timeout</span>) <span class="op">=</span> <span class="ident">timeout</span> {
<span class="ident">timeout</span>
.<span class="ident">as_secs</span>()
.<span class="ident">saturating_mul</span>(<span class="number">1_000_000_000</span>)
.<span class="ident">saturating_add</span>(<span class="ident">timeout</span>.<span class="ident">subsec_nanos</span>() <span class="kw">as</span> <span class="ident">u64</span>)
} <span class="kw">else</span> {
<span class="ident">u64</span>::<span class="ident">max_value</span>()
};
<span class="kw">let</span> <span class="ident">vk</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">device</span>.<span class="ident">pointers</span>();
<span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">check_errors</span>(<span class="ident">vk</span>.<span class="ident">WaitForFences</span>(<span class="self">self</span>.<span class="ident">device</span>.<span class="ident">internal_object</span>(),
<span class="number">1</span>,
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">fence</span>,
<span class="ident">vk</span>::<span class="ident">TRUE</span>,
<span class="ident">timeout_ns</span>))<span class="question-mark">?</span>;
<span class="kw">match</span> <span class="ident">r</span> {
<span class="ident">Success</span>::<span class="ident">Success</span> <span class="op">=</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">signaled</span>.<span class="ident">store</span>(<span class="bool-val">true</span>, <span class="ident">Ordering</span>::<span class="ident">Relaxed</span>);
<span class="prelude-val">Ok</span>(())
},
<span class="ident">Success</span>::<span class="ident">Timeout</span> <span class="op">=</span><span class="op">></span> {
<span class="prelude-val">Err</span>(<span class="ident">FenceWaitError</span>::<span class="ident">Timeout</span>)
},
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
}
}
}
<span class="doccomment">/// Waits for multiple fences at once.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panic</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Panics if not all fences belong to the same device.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">multi_wait</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">I</span><span class="op">></span>(<span class="ident">iter</span>: <span class="ident">I</span>, <span class="ident">timeout</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">FenceWaitError</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span><span class="op">></span><span class="op">></span>,
<span class="ident">D</span>: <span class="lifetime">'a</span>
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">device</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">Device</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">None</span>;
<span class="kw">let</span> <span class="ident">fences</span>: <span class="ident">SmallVec</span><span class="op"><</span>[<span class="ident">vk</span>::<span class="ident">Fence</span>; <span class="number">8</span>]<span class="op">></span> <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">into_iter</span>()
.<span class="ident">filter_map</span>(<span class="op">|</span><span class="ident">fence</span><span class="op">|</span> {
<span class="kw">match</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">device</span> {
<span class="ident">dev</span> @ <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw-2">*</span><span class="ident">dev</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">fence</span>.<span class="ident">device</span>),
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">dev</span>)
<span class="kw">if</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">dev</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">Device</span> <span class="op">=</span><span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">fence</span>.<span class="ident">device</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">Device</span> <span class="op">=</span><span class="op">></span> {},
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Tried to wait for multiple fences that didn't belong to the \
same device"</span>),
};
<span class="kw">if</span> <span class="ident">fence</span>.<span class="ident">signaled</span>.<span class="ident">load</span>(<span class="ident">Ordering</span>::<span class="ident">Relaxed</span>) {
<span class="prelude-val">None</span>
} <span class="kw">else</span> {
<span class="prelude-val">Some</span>(<span class="ident">fence</span>.<span class="ident">fence</span>)
}
})
.<span class="ident">collect</span>();
<span class="kw">let</span> <span class="ident">timeout_ns</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">timeout</span>) <span class="op">=</span> <span class="ident">timeout</span> {
<span class="ident">timeout</span>
.<span class="ident">as_secs</span>()
.<span class="ident">saturating_mul</span>(<span class="number">1_000_000_000</span>)
.<span class="ident">saturating_add</span>(<span class="ident">timeout</span>.<span class="ident">subsec_nanos</span>() <span class="kw">as</span> <span class="ident">u64</span>)
} <span class="kw">else</span> {
<span class="ident">u64</span>::<span class="ident">max_value</span>()
};
<span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">device</span>) <span class="op">=</span> <span class="ident">device</span> {
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">vk</span> <span class="op">=</span> <span class="ident">device</span>.<span class="ident">pointers</span>();
<span class="ident">check_errors</span>(<span class="ident">vk</span>.<span class="ident">WaitForFences</span>(<span class="ident">device</span>.<span class="ident">internal_object</span>(),
<span class="ident">fences</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">u32</span>,
<span class="ident">fences</span>.<span class="ident">as_ptr</span>(),
<span class="ident">vk</span>::<span class="ident">TRUE</span>,
<span class="ident">timeout_ns</span>))<span class="question-mark">?</span>
}
} <span class="kw">else</span> {
<span class="kw">return</span> <span class="prelude-val">Ok</span>(());
};
<span class="kw">match</span> <span class="ident">r</span> {
<span class="ident">Success</span>::<span class="ident">Success</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">Ok</span>(()),
<span class="ident">Success</span>::<span class="ident">Timeout</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">Err</span>(<span class="ident">FenceWaitError</span>::<span class="ident">Timeout</span>),
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
}
}
<span class="doccomment">/// Resets the fence.</span>
<span class="comment">// This function takes a `&mut self` because the Vulkan API requires that the fence be</span>
<span class="comment">// externally synchronized.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">reset</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">OomError</span><span class="op">></span> {
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">vk</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">device</span>.<span class="ident">pointers</span>();
<span class="ident">check_errors</span>(<span class="ident">vk</span>.<span class="ident">ResetFences</span>(<span class="self">self</span>.<span class="ident">device</span>.<span class="ident">internal_object</span>(), <span class="number">1</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">fence</span>))<span class="question-mark">?</span>;
<span class="self">self</span>.<span class="ident">signaled</span>.<span class="ident">store</span>(<span class="bool-val">false</span>, <span class="ident">Ordering</span>::<span class="ident">Relaxed</span>);
<span class="prelude-val">Ok</span>(())
}
}
<span class="doccomment">/// Resets multiple fences at once.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panic</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - Panics if not all fences belong to the same device.</span>
<span class="doccomment">///</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">multi_reset</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">I</span><span class="op">></span>(<span class="ident">iter</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">OomError</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span><span class="op">></span><span class="op">></span>,
<span class="ident">D</span>: <span class="lifetime">'a</span>
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">device</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">Device</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">None</span>;
<span class="kw">let</span> <span class="ident">fences</span>: <span class="ident">SmallVec</span><span class="op"><</span>[<span class="ident">vk</span>::<span class="ident">Fence</span>; <span class="number">8</span>]<span class="op">></span> <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">into_iter</span>()
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">fence</span><span class="op">|</span> {
<span class="kw">match</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">device</span> {
<span class="ident">dev</span> @ <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw-2">*</span><span class="ident">dev</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">fence</span>.<span class="ident">device</span>),
<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">dev</span>)
<span class="kw">if</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">dev</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">Device</span> <span class="op">=</span><span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">fence</span>.<span class="ident">device</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">Device</span> <span class="op">=</span><span class="op">></span> {},
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Tried to reset multiple fences that didn't belong to the same \
device"</span>),
};
<span class="ident">fence</span>.<span class="ident">signaled</span>.<span class="ident">store</span>(<span class="bool-val">false</span>, <span class="ident">Ordering</span>::<span class="ident">Relaxed</span>);
<span class="ident">fence</span>.<span class="ident">fence</span>
})
.<span class="ident">collect</span>();
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">device</span>) <span class="op">=</span> <span class="ident">device</span> {
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">vk</span> <span class="op">=</span> <span class="ident">device</span>.<span class="ident">pointers</span>();
<span class="ident">check_errors</span>(<span class="ident">vk</span>.<span class="ident">ResetFences</span>(<span class="ident">device</span>.<span class="ident">internal_object</span>(),
<span class="ident">fences</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">u32</span>,
<span class="ident">fences</span>.<span class="ident">as_ptr</span>()))<span class="question-mark">?</span>;
}
}
<span class="prelude-val">Ok</span>(())
}
}
<span class="kw">unsafe</span> <span class="kw">impl</span> <span class="ident">DeviceOwned</span> <span class="kw">for</span> <span class="ident">Fence</span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">device</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span><span class="ident">Arc</span><span class="op"><</span><span class="ident">Device</span><span class="op">></span> {
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">device</span>
}
}
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="ident">VulkanObject</span> <span class="kw">for</span> <span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">SafeDeref</span><span class="op"><</span><span class="ident">Target</span> <span class="op">=</span> <span class="ident">Device</span><span class="op">></span>
{
<span class="kw">type</span> <span class="ident">Object</span> <span class="op">=</span> <span class="ident">vk</span>::<span class="ident">Fence</span>;
<span class="kw">const</span> <span class="ident">TYPE</span>: <span class="ident">vk</span>::<span class="ident">DebugReportObjectTypeEXT</span> <span class="op">=</span> <span class="ident">vk</span>::<span class="ident">DEBUG_REPORT_OBJECT_TYPE_FENCE_EXT</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">internal_object</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">vk</span>::<span class="ident">Fence</span> {
<span class="self">self</span>.<span class="ident">fence</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">Fence</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">SafeDeref</span><span class="op"><</span><span class="ident">Target</span> <span class="op">=</span> <span class="ident">Device</span><span class="op">></span>
{
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="kw">unsafe</span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">must_put_in_pool</span> {
<span class="kw">let</span> <span class="ident">raw_fence</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">fence</span>;
<span class="self">self</span>.<span class="ident">device</span>.<span class="ident">fence_pool</span>().<span class="ident">lock</span>().<span class="ident">unwrap</span>().<span class="ident">push</span>(<span class="ident">raw_fence</span>);
} <span class="kw">else</span> {
<span class="kw">let</span> <span class="ident">vk</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">device</span>.<span class="ident">pointers</span>();
<span class="ident">vk</span>.<span class="ident">DestroyFence</span>(<span class="self">self</span>.<span class="ident">device</span>.<span class="ident">internal_object</span>(), <span class="self">self</span>.<span class="ident">fence</span>, <span class="ident">ptr</span>::<span class="ident">null</span>());
}
}
}
}
<span class="doccomment">/// Error that can be returned when waiting on a fence.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">FenceWaitError</span> {
<span class="doccomment">/// Not enough memory to complete the wait.</span>
<span class="ident">OomError</span>(<span class="ident">OomError</span>),
<span class="doccomment">/// The specified timeout wasn't long enough.</span>
<span class="ident">Timeout</span>,
<span class="doccomment">/// The device has been lost.</span>
<span class="ident">DeviceLostError</span>,
}
<span class="kw">impl</span> <span class="ident">error</span>::<span class="ident">Error</span> <span class="kw">for</span> <span class="ident">FenceWaitError</span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">description</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span><span class="ident">str</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">FenceWaitError</span>::<span class="ident">OomError</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="string">"no memory available"</span>,
<span class="ident">FenceWaitError</span>::<span class="ident">Timeout</span> <span class="op">=</span><span class="op">></span> <span class="string">"the timeout has been reached"</span>,
<span class="ident">FenceWaitError</span>::<span class="ident">DeviceLostError</span> <span class="op">=</span><span class="op">></span> <span class="string">"the device was lost"</span>,
}
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">cause</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">dyn</span> <span class="ident">error</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">FenceWaitError</span>::<span class="ident">OomError</span>(<span class="kw-2">ref</span> <span class="ident">err</span>) <span class="op">=</span><span class="op">></span> <span class="prelude-val">Some</span>(<span class="ident">err</span>),
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">None</span>,
}
}
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">FenceWaitError</span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">fmt</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="macro">write</span><span class="macro">!</span>(<span class="ident">fmt</span>, <span class="string">"{}"</span>, <span class="ident">error</span>::<span class="ident">Error</span>::<span class="ident">description</span>(<span class="self">self</span>))
}
}
<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">Error</span><span class="op">></span> <span class="kw">for</span> <span class="ident">FenceWaitError</span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">err</span>: <span class="ident">Error</span>) <span class="op">-</span><span class="op">></span> <span class="ident">FenceWaitError</span> {
<span class="kw">match</span> <span class="ident">err</span> {
<span class="ident">Error</span>::<span class="ident">OutOfHostMemory</span> <span class="op">=</span><span class="op">></span> <span class="ident">FenceWaitError</span>::<span class="ident">OomError</span>(<span class="ident">From</span>::<span class="ident">from</span>(<span class="ident">err</span>)),
<span class="ident">Error</span>::<span class="ident">OutOfDeviceMemory</span> <span class="op">=</span><span class="op">></span> <span class="ident">FenceWaitError</span>::<span class="ident">OomError</span>(<span class="ident">From</span>::<span class="ident">from</span>(<span class="ident">err</span>)),
<span class="ident">Error</span>::<span class="ident">DeviceLost</span> <span class="op">=</span><span class="op">></span> <span class="ident">FenceWaitError</span>::<span class="ident">DeviceLostError</span>,
<span class="kw">_</span> <span class="op">=</span><span class="op">></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Unexpected error value: {}"</span>, <span class="ident">err</span> <span class="kw">as</span> <span class="ident">i32</span>),
}
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
<span class="kw">mod</span> <span class="ident">tests</span> {
<span class="kw">use</span> <span class="ident">VulkanObject</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::<span class="ident">Duration</span>;
<span class="kw">use</span> <span class="ident">sync</span>::<span class="ident">Fence</span>;
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">fence_create</span>() {
<span class="kw">let</span> (<span class="ident">device</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">gfx_dev_and_queue</span><span class="macro">!</span>();
<span class="kw">let</span> <span class="ident">fence</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">alloc</span>(<span class="ident">device</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">fence</span>.<span class="ident">ready</span>().<span class="ident">unwrap</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">fence_create_signaled</span>() {
<span class="kw">let</span> (<span class="ident">device</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">gfx_dev_and_queue</span><span class="macro">!</span>();
<span class="kw">let</span> <span class="ident">fence</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">alloc_signaled</span>(<span class="ident">device</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">fence</span>.<span class="ident">ready</span>().<span class="ident">unwrap</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">fence_signaled_wait</span>() {
<span class="kw">let</span> (<span class="ident">device</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">gfx_dev_and_queue</span><span class="macro">!</span>();
<span class="kw">let</span> <span class="ident">fence</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">alloc_signaled</span>(<span class="ident">device</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="ident">fence</span>.<span class="ident">wait</span>(<span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">10</span>))).<span class="ident">unwrap</span>();
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">fence_reset</span>() {
<span class="kw">let</span> (<span class="ident">device</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">gfx_dev_and_queue</span><span class="macro">!</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">fence</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">alloc_signaled</span>(<span class="ident">device</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="ident">fence</span>.<span class="ident">reset</span>().<span class="ident">unwrap</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">fence</span>.<span class="ident">ready</span>().<span class="ident">unwrap</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">multiwait_different_devices</span>() {
<span class="kw">let</span> (<span class="ident">device1</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">gfx_dev_and_queue</span><span class="macro">!</span>();
<span class="kw">let</span> (<span class="ident">device2</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">gfx_dev_and_queue</span><span class="macro">!</span>();
<span class="macro">assert_should_panic</span><span class="macro">!</span>(<span class="string">"Tried to wait for multiple fences that didn't belong \
to the same device"</span>,
{
<span class="kw">let</span> <span class="ident">fence1</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">alloc_signaled</span>(<span class="ident">device1</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="ident">fence2</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">alloc_signaled</span>(<span class="ident">device2</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">multi_wait</span>([<span class="kw-2">&</span><span class="ident">fence1</span>, <span class="kw-2">&</span><span class="ident">fence2</span>].<span class="ident">iter</span>().<span class="ident">cloned</span>(),
<span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">10</span>)));
});
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">multireset_different_devices</span>() {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">once</span>;
<span class="kw">let</span> (<span class="ident">device1</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">gfx_dev_and_queue</span><span class="macro">!</span>();
<span class="kw">let</span> (<span class="ident">device2</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">gfx_dev_and_queue</span><span class="macro">!</span>();
<span class="macro">assert_should_panic</span><span class="macro">!</span>(<span class="string">"Tried to reset multiple fences that didn't belong \
to the same device"</span>,
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">fence1</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">alloc_signaled</span>(<span class="ident">device1</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">fence2</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">alloc_signaled</span>(<span class="ident">device2</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">multi_reset</span>(<span class="ident">once</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fence1</span>)
.<span class="ident">chain</span>(<span class="ident">once</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fence2</span>)));
});
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">fence_pool</span>() {
<span class="kw">let</span> (<span class="ident">device</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">gfx_dev_and_queue</span><span class="macro">!</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">device</span>.<span class="ident">fence_pool</span>().<span class="ident">lock</span>().<span class="ident">unwrap</span>().<span class="ident">len</span>(), <span class="number">0</span>);
<span class="kw">let</span> <span class="ident">fence1_internal_obj</span> <span class="op">=</span> {
<span class="kw">let</span> <span class="ident">fence</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">from_pool</span>(<span class="ident">device</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">device</span>.<span class="ident">fence_pool</span>().<span class="ident">lock</span>().<span class="ident">unwrap</span>().<span class="ident">len</span>(), <span class="number">0</span>);
<span class="ident">fence</span>.<span class="ident">internal_object</span>()
};
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">device</span>.<span class="ident">fence_pool</span>().<span class="ident">lock</span>().<span class="ident">unwrap</span>().<span class="ident">len</span>(), <span class="number">1</span>);
<span class="kw">let</span> <span class="ident">fence2</span> <span class="op">=</span> <span class="ident">Fence</span>::<span class="ident">from_pool</span>(<span class="ident">device</span>.<span class="ident">clone</span>()).<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">device</span>.<span class="ident">fence_pool</span>().<span class="ident">lock</span>().<span class="ident">unwrap</span>().<span class="ident">len</span>(), <span class="number">0</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">fence2</span>.<span class="ident">internal_object</span>(), <span class="ident">fence1_internal_obj</span>);
}
}
</pre></div>
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