{"id":45343,"date":"2023-07-11T19:19:51","date_gmt":"2023-07-10T05:15:52","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45343-2\/"},"modified":"2024-04-30T13:05:22","modified_gmt":"2024-04-30T05:05:22","slug":"45343-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45343-2\/","title":{"rendered":""},"content":{"rendered":"<h2>\u306f\u3058\u3081\u306b<\/h2>\n<p>\u3053\u306e\u8a18\u4e8b\u306f\u6b21\u306e\u8a18\u4e8b\u306e C# \u2192 Rust \u7248\u3067\u3059\u3002<\/p>\n<ul class=\"post-ul\">C#\u304b\u3089C++\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059<\/ul>\n<p>\u666e\u901a\u306b Rust \u306e\u95a2\u6570\u3092 extern \u3067\u516c\u958b\u3059\u308b\u3060\u3051\u3001\u3068\u3044\u3046\u8a71\u3067\u306f\u306a\u304f\u69cb\u9020\u4f53\u306b\u5bfe\u3057\u3066 impl \u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u5b9f\u88c5\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u3092 C# \u304b\u3089\u547c\u3073\u51fa\u3057\u307e\u3059\u3002 \u300c\u30cd\u30a4\u30c6\u30a3\u30d6 (Rust) \u5074\u306e\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3092\u547c\u3073\u51fa\u3057\u5143\u306e C# \u3067\u884c\u3044\u305f\u3044\u300d \u3092\u9054\u6210\u3059\u308b\u4e8b\u3092\u76ee\u7684\u3068\u3057\u307e\u3059\u3002<\/p>\n<p>\u57fa\u672c\u7684\u306b\u306f C# \u5074\u306f\u5143\u8a18\u4e8b\u3068\u307b\u307c\u540c\u3058 (\u4e00\u90e8\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3092 int \u304b\u3089 uint \u306b\u5909\u3048\u307e\u3057\u305f\u304c\u305d\u308c\u4ee5\u5916\u306f\u540c\u3058) \u3067\u3001 Rust \u5074\u3092 C++ \u3068\u540c\u3058\u5b9f\u88c5\u306b\u306a\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u5143\u8a18\u4e8b\u3067\u306f &#8220;\u30d1\u30bf\u30fc\u30f3 2&#8221; \u3068\u547c\u3093\u3067\u3044\u308b\u6bd4\u8f03\u7684\u7a4f\u5f53\u306a\u65b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u74b0\u5883\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Windows 10<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Visual Studio 2019<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">CLion 2019.3<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">.NET Core 3.1<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">rustc 1.41.0<\/ul>\n<p>\u30ea\u30dd\u30b8\u30c8\u30ea\u306f\u3053\u3061\u3089\u3067\u3059\u3002<\/p>\n<ul class=\"post-ul\">aosoft \/ CsRustInvokeSample<\/ul>\n<h2>Rust \u5074\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308b<\/h2>\n<p>Rust \u306f\u4ed6\u306e\u8a00\u8a9e\u3068\u540c\u69d8\u306b\u30e1\u30e2\u30ea\u306f\u30b9\u30bf\u30c3\u30af\u304b\u30d2\u30fc\u30d7\u306b\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002\u7279\u306b\u610f\u8b58\u3057\u306a\u3044\u5834\u5408\u306f\u30b9\u30bf\u30c3\u30af\u3067\u30d2\u30fc\u30d7\u306b\u78ba\u4fdd\u3057\u305f\u3044\u5834\u5408\u306f Box \u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>Rust \u306f\u30e1\u30e2\u30ea\u5b89\u5168\u6027\u3092\u5f37\u304f\u610f\u8b58\u3055\u308c\u3066\u3044\u308b\u8a00\u8a9e\u3067\u666e\u901a\u306b\u4f7f\u3063\u3066\u3044\u308b\u9650\u308a\u3067\u306f\u78ba\u4fdd\u3057\u305f\u30e1\u30e2\u30ea\u306f\u4e0d\u8981\u306b\u306a\u3063\u305f\u3089\u81ea\u52d5\u3067\u89e3\u653e\u3055\u308c\u307e\u3059\u304c\u3001\u4eca\u56de\u306e\u5834\u5408\u306f C# \u5074\u304c\u4e3b\u4f53\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067 Rust \u306e\u65b9\u3067\u7834\u68c4\u3055\u308c\u305f\u308a\u3057\u305f\u3089\u56f0\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001 Box::into_raw, Box::from_raw \u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 into_raw \u3067\u7ba1\u7406\u5bfe\u8c61\u304b\u3089\u5916\u3057\u3066 raw pointer \u3092\u53d6\u5f97\u3057\u307e\u3059\u3002 from_raw \u306f\u9006\u3067 raw pointer \u304b\u3089 Box \u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">impl<\/span> <span class=\"n\">RustSample<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">new<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">RustSample<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">RustSample<\/span> <span class=\"p\">{<\/span> <span class=\"n\">number<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"nb\">str<\/span><span class=\"p\">:<\/span> <span class=\"nn\">String<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">()<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">unsafe<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">new_raw<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">RustSample<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nn\">Box<\/span><span class=\"p\">::<\/span><span class=\"nf\">into_raw<\/span><span class=\"p\">(<\/span><span class=\"nn\">Box<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"nn\">RustSample<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">()))<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">destroy<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nn\">Box<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_raw<\/span><span class=\"p\">(<\/span><span class=\"k\">self<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">RustSample<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>new_raw \u3067\u306f Box \u5316\u3057\u305f RustSample \u3092 into_raw \u3067 raw pointer \u306b\u3057\u305f\u3082\u306e\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<p>destroy \u3067\u306f from_raw \u3067\u518d\u5ea6 Box \u5316\u3057\u3001\u305d\u306e\u307e\u307e\u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u308b\u3053\u3068\u3067\u89e3\u653e\u3092\u3057\u307e\u3059\u3002\u3053\u306e\u6d41\u308c\u3067\u306f drop trait \u306e\u5b9f\u884c\u3082\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u7ba1\u7406\u4ee5\u5916\u306b\u3064\u3044\u3066\u306f\u901a\u5e38\u306e Rust \u3068\u307b\u307c\u540c\u3058\u3088\u3046\u306b\u6271\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u5f53\u305f\u308a\u524d\u306e\u8a71\u3067\u3059\u304c\u3001 into_raw \u3067 raw pointer \u5316\u3057\u305f\u3082\u306e\u306f from_pointer \u3067 Rust \u306b\u623b\u3055\u306a\u3044\u3068\u30ea\u30fc\u30af\u3057\u307e\u3059\u3002\u8981\u30fb\u81ea\u5df1\u8cac\u4efb\u3067\u3059\u3002<\/p>\n<h3>malloc \/ free \u3092\u4f7f\u3046<\/h3>\n<p>\u5b9f\u306f\u5f53\u521d into_raw, from_raw \u306e\u5b58\u5728\u306b\u6c17\u3065\u3044\u3066\u3044\u306a\u304f\u3066 malloc \/ free \u3067\u3084\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u306e\u3084\u308a\u65b9\u306f\u9762\u5012\u306a\u4e0a\u306b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf (new) \u3068 drop trait \u306e\u547c\u3073\u51fa\u3057\u3092\u8a18\u8ff0\u3057\u306a\u3044\u4e8b\u304c\u5341\u5206\u8003\u3048\u3089\u308c\u307e\u3059\u3002\u306e\u3067\u3084\u3089\u306a\u3044\u65b9\u304c\u7121\u96e3\u3067\u3057\u3087\u3046\u3002<\/p>\n<ul class=\"post-ul\">lib.rs (malloc \/ free \u7248)<\/ul>\n<h2>\u95a2\u6570\u30c6\u30fc\u30d6\u30eb\u3092\u7528\u610f\u3059\u308b<\/h2>\n<p>C++ \u7248\u3067\u306f\u95a2\u6570\u30c6\u30fc\u30d6\u30eb\u3092\u81ea\u524d\u3067\u751f\u6210\u3057\u3066\u305d\u308c\u3092\u914d\u5217\u3067\u8fd4\u3059\u3068\u3044\u3046\u3084\u308a\u65b9\u3092\u3057\u307e\u3057\u305f\u3002\u4eca\u56de\u3082\u305d\u308c\u3092\u8e0f\u8972\u3057\u307e\u3059\u3002<\/p>\n<p>Rust \u306e\u95a2\u6570\u30dd\u30a4\u30f3\u30bf\u306f\u6b21\u306e\u3088\u3046\u306b\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u3068 raw pointer (= \u5916\u90e8\u306b\u51fa\u305b\u308b) \u3068\u3057\u3066\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<br \/>\n(2020\/9\/14 \u4fee\u6b63: \u4ee5\u524d\u306f\u4e00\u56de Rust \u306e\u95a2\u6570\u30dd\u30a4\u30f3\u30bf\u306b\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u3001\u3068\u66f8\u3044\u3066\u3044\u307e\u3057\u305f\u304c\u4e0d\u8981\u3067\u3057\u305f)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">foo<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"foo\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">let<\/span> <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"n\">foo<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"p\">();<\/span>\r\n<\/code><\/pre>\n<p>Rust \u306e\u95a2\u6570\u306f C++ \u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u7570\u306a\u308a\u3069\u306e\u3088\u3046\u306a\u6642\u3067\u3082 C \u8a00\u8a9e\u95a2\u6570\u3068\u4e92\u63db\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u306e\u3067 C++ \u306e\u6642\u306e\u3088\u3046\u306a\u7d30\u5de5\u306f\u4e0d\u8981\u3067\u666e\u901a\u306b\u914d\u5217\u306b\u4e26\u3079\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">table<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"p\">[<\/span>\r\n    <span class=\"nn\">RustSample<\/span><span class=\"p\">::<\/span><span class=\"n\">destroy<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span><span class=\"p\">(),<\/span>\r\n    <span class=\"nn\">RustSample<\/span><span class=\"p\">::<\/span><span class=\"n\">get_current_value<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span><span class=\"p\">(),<\/span>\r\n<span class=\"p\">];<\/span>\r\n<\/code><\/pre>\n<p>create_rust_sample_instance \u3067\u306f\u6e21\u3055\u308c\u305f\u30d0\u30c3\u30d5\u30a1\u306b\u5bfe\u3057\u3066 RustSample \u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u95a2\u6570\u30c6\u30fc\u30d6\u30eb\u306e\u5185\u5bb9\u3092\u30b3\u30d4\u30fc\u3057\u307e\u3059\u3002<\/p>\n<h3>\u95a2\u6570\u30c6\u30fc\u30d6\u30eb\u306f\u5fc5\u8981\u306a\u3044\uff1f<\/h3>\n<p>C++ \u306e\u6642\u306f\u4e0a\u8a18\u306e\u901a\u308a\u305d\u308c\u3092\u3084\u308b\u5f37\u3044\u7406\u7531\u304c\u3042\u308a\u307e\u3057\u305f (C++ \u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u95a2\u6570\u30dd\u30a4\u30f3\u30bf\u306f\u901a\u5e38\u30dd\u30a4\u30f3\u30bf\u3068\u4e92\u63db\u6027\u304c\u306a\u304b\u3063\u305f) \u304c\u3001 Rust \u306b\u306f\u305d\u308c\u304c\u306a\u304f<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">impl<\/span> <span class=\"n\">RustSample<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">add<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"n\">num<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">self<\/span><span class=\"py\">.number<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">num<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nd\">#[no_mangle]<\/span>\r\n<span class=\"k\">extern<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">RustSample_add<\/span><span class=\"p\">(<\/span><span class=\"n\">s<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"n\">RustSample<\/span><span class=\"p\">,<\/span> <span class=\"n\">num<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">s<\/span><span class=\"py\">.number<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">num<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4e8c\u3064\u306f ABI \u7684\u306b\u306f\u7b49\u4fa1\u3067\u3042\u308b\u306e\u3067\u3001 RustSample_add \u306a\u3069\u5404\u30e1\u30bd\u30c3\u30c9\u3092 DllImport \u3067\u5165\u529b\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3082\u554f\u984c\u306a\u3044\u3067\u3059\u3057 C# \u5074\u3092\u542b\u3081\u305f\u8a18\u8ff0\u91cf\u7684\u306b\u3082\u7d50\u679c\u7684\u306b\u5c11\u306a\u304f\u306a\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u5272\u3068\u8da3\u5473\u7684\u306a\u3068\u3053\u308d\u304b\u3068\u601d\u3044\u307e\u3059\u304c\u3001<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u578b\u306b\u5bfe\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u306f impl \u3092\u4f7f\u3063\u3066\u5b9f\u88c5\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3068\u601d\u3044\u307e\u3059<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">extern \u3067\u5b9a\u7fa9\u3057\u305f\u95a2\u6570\u3092\u8e0f\u307f\u53f0\u306b\u3057\u3066 impl \u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3076\u306e\u306f\u8a18\u8ff0\u91cf\u304c\u5897\u3048\u3066\u672c\u672b\u8ee2\u5012\u306b\u306a\u308a\u305d\u3046\u3067\u3059 (\u30de\u30af\u30ed\u3067\u306a\u3093\u3068\u304b\u306a\u308a\u305d\u3046\u3067\u306f\u3042\u308a\u307e\u3059)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">DllImport \u3067\u306f\u306a\u304f\u30b3\u30fc\u30c9\u3067 DLL \u306e\u52d5\u7684\u30ed\u30fc\u30c9\u3092\u3057\u3088\u3046\u3068\u3057\u305f\u6642\u3001\u7d50\u5c40\u624b\u9593\u306b\u306a\u308a\u305d\u3046\u3067\u3059<\/ul>\n<p>\u307e\u305f\u3001\u5927\u91cf\u306b export \u3057\u3066\u3044\u308b\u95a2\u6570\u304c\u3042\u308b\u306e\u304c\u500b\u4eba\u7684\u306b\u306f\u3042\u3093\u307e\u308a\u597d\u304d\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u305d\u3046\u3044\u3063\u305f\u89b3\u70b9\u304b\u3089\u3067\u3082\u79c1\u306f\u95a2\u6570\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u308b\u3084\u308a\u65b9\u3092\u3068\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h2>C# \u304b\u3089\u547c\u3073\u51fa\u3059<\/h2>\n<p>\u3053\u3061\u3089\u306f C++ \u7248\u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">[<\/span><span class=\"nf\">DllImport<\/span><span class=\"p\">(<\/span><span class=\"s\">\"cs_rust_invoke\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">EntryPoint<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"create_rust_sample_instance\"<\/span><span class=\"p\">)]<\/span>\r\n<span class=\"k\">static<\/span> <span class=\"k\">extern<\/span> <span class=\"kt\">uint<\/span> <span class=\"nf\">CreateRustSampleInstance<\/span><span class=\"p\">(<\/span><span class=\"n\">IntPtr<\/span><span class=\"p\">[]<\/span> <span class=\"n\">buffer<\/span><span class=\"p\">,<\/span> <span class=\"kt\">uint<\/span> <span class=\"n\">bufferSize<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>Rust \u306f\u547d\u540d\u898f\u5247\u304c snake case \u306a\u306e\u3067 DllImport \u6642\u306b\u8abf\u6574\u3059\u308b\u306e\u304c\u3088\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">public<\/span> <span class=\"nf\">RustSample<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"kt\">uint<\/span> <span class=\"n\">bufferSize<\/span> <span class=\"p\">=<\/span> <span class=\"nf\">CreateRustSampleInstance<\/span><span class=\"p\">(<\/span><span class=\"k\">null<\/span><span class=\"p\">,<\/span> <span class=\"m\">0<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">buffer<\/span> <span class=\"p\">=<\/span> <span class=\"k\">new<\/span> <span class=\"n\">IntPtr<\/span><span class=\"p\">[<\/span><span class=\"n\">bufferSize<\/span><span class=\"p\">];<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nf\">CreateRustSampleInstance<\/span><span class=\"p\">(<\/span><span class=\"n\">buffer<\/span><span class=\"p\">,<\/span> <span class=\"n\">bufferSize<\/span><span class=\"p\">)<\/span> <span class=\"p\">!=<\/span> <span class=\"n\">bufferSize<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">{<\/span>\r\n        <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">Exception<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"n\">_self<\/span> <span class=\"p\">=<\/span> <span class=\"n\">buffer<\/span><span class=\"p\">[<\/span><span class=\"m\">0<\/span><span class=\"p\">];<\/span>\r\n    <span class=\"n\">_fnDestroy<\/span> <span class=\"p\">=<\/span> <span class=\"n\">Marshal<\/span><span class=\"p\">.<\/span><span class=\"n\">GetDelegateForFunctionPointer<\/span><span class=\"p\">&lt;<\/span><span class=\"n\">FnAction<\/span><span class=\"p\">&gt;(<\/span><span class=\"n\">buffer<\/span><span class=\"p\">[<\/span><span class=\"m\">1<\/span><span class=\"p\">]);<\/span>\r\n<\/code><\/pre>\n<p>\u30c6\u30fc\u30d6\u30eb\u306e 0 \u756a\u306b Rust \u5074\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30dd\u30a4\u30f3\u30bf\u3001 1 \u756a\u4ee5\u964d\u304c\u95a2\u6570\u30dd\u30a4\u30f3\u30bf\u306a\u306e\u3067 delegate \u5316\u3057\u3066 C# \u304b\u3089\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">public<\/span> <span class=\"k\">void<\/span> <span class=\"nf\">Add<\/span><span class=\"p\">(<\/span><span class=\"kt\">int<\/span> <span class=\"k\">value<\/span><span class=\"p\">)<\/span> <span class=\"p\">=&gt;<\/span> <span class=\"nf\">_fnAdd<\/span><span class=\"p\">(<\/span><span class=\"n\">_self<\/span><span class=\"p\">,<\/span> <span class=\"k\">value<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u7b2c\u4e00\u5f15\u6570\u304c\u6e21\u3055\u308c\u305f struct \u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u306a\u306e\u3067\u305d\u308c\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">public<\/span> <span class=\"k\">void<\/span> <span class=\"nf\">Dispose<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"n\">_fnDestroy<\/span><span class=\"p\">?.<\/span><span class=\"nf\">Invoke<\/span><span class=\"p\">(<\/span><span class=\"n\">_self<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">_fnDestroy<\/span> <span class=\"p\">=<\/span> <span class=\"k\">null<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"n\">_self<\/span> <span class=\"p\">=<\/span> <span class=\"n\">IntPtr<\/span><span class=\"p\">.<\/span><span class=\"n\">Zero<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>Dispose \u306b RustSample::destroy \u3092\u547c\u3073\u51fa\u3059\u8a18\u8ff0\u3092\u5b9f\u88c5\u3057\u3001\u3053\u3053\u304b\u3089 Rust \u5074\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7834\u68c4\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<h3>\u6587\u5b57\u5217\u306e\u6271\u3044<\/h3>\n<pre class=\"post-pre\"><code><span class=\"k\">delegate<\/span> <span class=\"kt\">uint<\/span> <span class=\"nf\">FnAppendChars<\/span><span class=\"p\">(<\/span><span class=\"n\">IntPtr<\/span> <span class=\"n\">self<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"nf\">MarshalAs<\/span><span class=\"p\">(<\/span><span class=\"n\">UnmanagedType<\/span><span class=\"p\">.<\/span><span class=\"n\">LPUTF8Str<\/span><span class=\"p\">)]<\/span> <span class=\"kt\">string<\/span> <span class=\"n\">s<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>Rust \u306e\u6587\u5b57\u5217\u306f UTF-8 \u306a\u306e\u3067 UnmanagedType.LPUTF8Str \u3092\u6307\u5b9a\u3059\u308b\u306e\u304c\u3088\u3044\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u3053\u306e\u5217\u6319\u5024\u306f .NET Framework 4.7 \/ .NET Core 1.1 \u4ee5\u964d\u306b\u3042\u308b\u3082\u306e\u306e\u3088\u3046\u306a\u306e\u3067\u74b0\u5883\u306b\u3088\u3063\u3066\u306f\u4f7f\u3048\u306a\u3044\u5834\u5408\u3082\u3042\u308b\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059 (.NET Standard 2.0 \u3067\u3082\u306a\u3044) \u3002<\/p>\n<h2>\u5b9f\u884c<\/h2>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d5dee37434c4406cf333e\/47-0.png\" alt=\"image.png\" \/><\/div>\n<p>C++ \u7248\u3068\u540c\u3058\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u307e\u305f\u3001 new, print_chars, drop \u3067\u305d\u308c\u305e\u308c\u30dd\u30a4\u30f3\u30bf\u5024\u3092\u5408\u308f\u305b\u3066\u51fa\u529b\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u308c\u305e\u308c\u9069\u5207\u306b\u547c\u3070\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>trait object \u3092\u4f7f\u3046<\/h2>\n<p>struct \u81ea\u4f53\u3067\u306f\u306a\u304f trait object \u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3078\u306e\u53c2\u7167\u3068\u3057\u3066\u5229\u7528\u3057\u3088\u3046\u3068\u3057\u305f\u5834\u5408\u3001 trait object \u306f\u3053\u308c\u307e\u3067\u6271\u3063\u3066\u304d\u305f\u666e\u901a\u306e\u30dd\u30a4\u30f3\u30bf (raw pointer) \u3068\u4e92\u63db\u6027\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<ul class=\"post-ul\">\u30c8\u30ec\u30a4\u30c8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/ul>\n<p>\u306b\u3088\u308b\u3068 trait object \u306f<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">pub<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">TraitObject<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"n\">data<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"p\">(),<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"n\">vtable<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"p\">(),<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3068\u3044\u3046\u8868\u73fe\u306b\u306a\u3063\u3066\u3044\u3066\u5b9f\u969b\u306b\u901a\u5e38\u306e\u30dd\u30a4\u30f3\u30bf 2 \u500b\u5206\u306e\u30b5\u30a4\u30ba\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3088\u3063\u3066 trait object \u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001 C# \u5074\u3082\u305d\u308c\u3092\u6271\u3048\u308b\u3088\u3046\u306a\u69cb\u9020\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u7b2c\u4e00\u5f15\u6570\u306b\u6e21\u3059\u3082\u306e\u3092 trait object \u3068\u4e92\u63db\u6027\u304c\u3042\u308b\u5f62\u5f0f\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u304c\u3001\u5b9f\u969b\u306e\u3068\u3053\u308d FFI \u3067 trait object \u3092\u5fc5\u8981\u3068\u3059\u308b\u30b1\u30fc\u30b9\u306f\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u306e\u3067\u3068\u308a\u3042\u3048\u305a\u6c17\u306b\u3059\u308b\u5fc5\u8981\u306f\u306a\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002\u4e00\u5fdc\u305d\u3046\u3044\u3063\u305f\u6ce8\u610f\u70b9\u304c\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3060\u3051\u8a18\u8f09\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<h2>\u547c\u3073\u51fa\u3057\u898f\u7d04\u306b\u3064\u3044\u3066<\/h2>\n<p>\u4eca\u56de Windows x64 \u3057\u304b\u8a66\u3057\u3066\u3044\u306a\u3044\u306e\u3067\u78ba\u8a8d\u3057\u3066\u3044\u307e\u305b\u3093\u304c\u3001\u5b9f\u969b\u306e\u3068\u3053\u308d\u306f\u547c\u3073\u51fa\u3057\u898f\u7d04\u306b\u914d\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u304c\u3001\u547c\u3073\u51fa\u3057\u898f\u7d04\u304c\u9762\u5012\u304f\u3055\u3044\u306e\u306f Windows x86 \u304f\u3089\u3044\u3060\u3068\u601d\u3046\u306e\u3067\u3068\u308a\u3042\u3048\u305a\u898b\u306a\u304b\u3063\u305f\u3053\u3068\u306b\u3057\u3066\u3044\u307e\u3059\u30fb\u30fb\u30fb<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4ed6\u8a00\u8a9e\u95a2\u6570\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">C\/C++ \u306e\u547c\u3073\u51fa\u3057\u898f\u7d04\u3092\u518d\u78ba\u8a8d\u3059\u308b<\/ul>\n<h2>\u304a\u308f\u308a\u306b<\/h2>\n<p>.NET \u7528\u306e\u30cd\u30a4\u30c6\u30a3\u30d6\u30b3\u30fc\u30c9\u306e\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3092 C# \u4e3b\u4f53\u3067\u884c\u3044\u305f\u3044\u3068\u3044\u3046\u30b1\u30fc\u30b9\u306f\u3088\u304f\u3042\u308a\u307e\u3059\u306e\u3067\u3001 Rust \u3067\u306e\u3084\u308a\u65b9\u3092\u660e\u78ba\u306b\u3057\u3066\u304a\u304f\u3053\u3068\u306f Rust \u3092\u4f7f\u3063\u3066\u3044\u304f\u306b\u3042\u305f\u3063\u3066\u500b\u4eba\u7684\u306b\u306f\u91cd\u8981\u306a\u3053\u3068\u3067\u3059\u3002<br \/>\nRust \u306f\u307e\u3060\u59cb\u3081\u305f\u3070\u304b\u308a\u306a\u306e\u3067\u7d50\u69cb\u8a66\u884c\u932f\u8aa4\u3092\u3057\u307e\u3057\u305f\u304c\u3001\u6700\u7d42\u7684\u306b\u306f\u304b\u306a\u308a\u30b7\u30f3\u30d7\u30eb\u306a\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u3092\u30d9\u30fc\u30b9\u306b\u4f5c\u696d\u3057\u3066\u3044\u3051\u308b\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b \u3053\u306e\u8a18\u4e8b\u306f\u6b21\u306e\u8a18\u4e8b\u306e C# \u2192 Rust \u7248\u3067\u3059\u3002 C#\u304b\u3089C++\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059  [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45343","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/45343-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u306f\u3058\u3081\u306b \u3053\u306e\u8a18\u4e8b\u306f\u6b21\u306e\u8a18\u4e8b\u306e C# \u2192 Rust 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