| <!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 of the Rust file `common/rusty_leveldb_sgx/src/env.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>env.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../rusty_leveldb/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../rusty_leveldb/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="doccomment">//! An `env` is an abstraction layer that allows the database to run both on different platforms as |
| //! well as persisting data on disk or in memory. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::error::Result; |
| |
| <span class="kw">use </span>std::io::prelude::<span class="kw-2">*</span>; |
| <span class="kw">use </span>std::os::unix::fs::FileExt; |
| <span class="kw">use </span>std::path::{Path, PathBuf}; |
| |
| <span class="kw">use </span>sgx_tprotected_fs::SgxFile; |
| |
| <span class="kw">pub trait </span>RandomAccess { |
| <span class="kw">fn </span>read_at(<span class="kw-2">&</span><span class="self">self</span>, off: usize, dst: <span class="kw-2">&mut </span>[u8]) -> <span class="prelude-ty">Result</span><usize>; |
| } |
| |
| <span class="kw">impl </span>RandomAccess <span class="kw">for </span>SgxFile { |
| <span class="kw">fn </span>read_at(<span class="kw-2">&</span><span class="self">self</span>, off: usize, dst: <span class="kw-2">&mut </span>[u8]) -> <span class="prelude-ty">Result</span><usize> { |
| <span class="prelude-val">Ok</span>((<span class="self">self </span><span class="kw">as </span><span class="kw-2">&</span><span class="kw">dyn </span>FileExt).read_at(dst, off <span class="kw">as </span>u64)<span class="question-mark">?</span>) |
| } |
| } |
| |
| <span class="kw">pub struct </span>FileLock { |
| <span class="kw">pub </span>id: String, |
| } |
| |
| <span class="kw">pub trait </span>Env { |
| <span class="kw">fn </span>open_sequential_file(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Box<<span class="kw">dyn </span>Read>>; |
| <span class="kw">fn </span>open_random_access_file(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Box<<span class="kw">dyn </span>RandomAccess>>; |
| <span class="kw">fn </span>open_writable_file(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Box<<span class="kw">dyn </span>Write>>; |
| <span class="kw">fn </span>open_appendable_file(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Box<<span class="kw">dyn </span>Write>>; |
| |
| <span class="kw">fn </span>exists(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><bool>; |
| <span class="kw">fn </span>children(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Vec<PathBuf>>; |
| <span class="kw">fn </span>size_of(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><usize>; |
| |
| <span class="kw">fn </span>delete(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><()>; |
| <span class="kw">fn </span>mkdir(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><()>; |
| <span class="kw">fn </span>rmdir(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><()>; |
| <span class="kw">fn </span>rename(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><()>; |
| |
| <span class="kw">fn </span>lock(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><FileLock>; |
| <span class="kw">fn </span>unlock(<span class="kw-2">&</span><span class="self">self</span>, l: FileLock) -> <span class="prelude-ty">Result</span><()>; |
| |
| <span class="kw">fn </span>new_logger(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Logger>; |
| |
| <span class="kw">fn </span>micros(<span class="kw-2">&</span><span class="self">self</span>) -> u64; |
| } |
| |
| <span class="kw">pub struct </span>Logger { |
| dst: Box<<span class="kw">dyn </span>Write>, |
| } |
| |
| <span class="kw">impl </span>Logger { |
| <span class="kw">pub fn </span>new(w: Box<<span class="kw">dyn </span>Write>) -> Logger { |
| Logger { dst: w } |
| } |
| |
| <span class="kw">pub fn </span>log(<span class="kw-2">&mut </span><span class="self">self</span>, message: <span class="kw-2">&</span>str) { |
| <span class="kw">let _ </span>= <span class="self">self</span>.dst.write(message.as_bytes()); |
| <span class="kw">let _ </span>= <span class="self">self</span>.dst.write(<span class="string">"\n"</span>.as_bytes()); |
| } |
| } |
| |
| <span class="kw">pub fn </span>path_to_string(p: <span class="kw-2">&</span>Path) -> String { |
| p.to_str().map(String::from).unwrap() |
| } |
| |
| <span class="kw">pub fn </span>path_to_str(p: <span class="kw-2">&</span>Path) -> <span class="kw-2">&</span>str { |
| p.to_str().unwrap() |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="rusty_leveldb" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
