-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy paththread_local_storage.html
More file actions
405 lines (338 loc) · 26 KB
/
Copy paththread_local_storage.html
File metadata and controls
405 lines (338 loc) · 26 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
<!doctype html>
<html class="cpprefjp" lang="ja" itemscope="" itemtype="http://schema.org/WebPage">
<head>
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-NXNBNVBTJS"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'G-NXNBNVBTJS');
</script>
<meta charset="UTF-8">
<title>スレッドローカルストレージ [N2659] - cpprefjp C++日本語リファレンス</title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="keywords" content="
C++,標準ライブラリ,リファレンス,ドキュメント,STL,std,cpp11,thread_local
">
<meta name="title" content="スレッドローカルストレージ [N2659] - cpprefjp C++日本語リファレンス" />
<meta itemprop="name" content="スレッドローカルストレージ [N2659] - cpprefjp C++日本語リファレンス" />
<meta property="og:title" content="スレッドローカルストレージ [N2659] - cpprefjp C++日本語リファレンス" />
<meta property="og:url" content="https://cpprefjp.github.io/lang/cpp11/thread_local_storage.html" />
<meta property="og:site_name" content="cpprefjp - C++日本語リファレンス" />
<meta property="og:type" content="article" />
<meta property="og:description" content="変数宣言の際に、記憶域として`thread_local`キーワードを指定することで、スレッドごとの静的記憶域に変数が保持される。" />
<meta name="twitter:card" content="summary" />
<meta name="twitter:title" content="スレッドローカルストレージ [N2659] - cpprefjp C++日本語リファレンス" />
<meta name="twitter:url" content="https://cpprefjp.github.io/lang/cpp11/thread_local_storage.html" />
<meta name="twitter:description" content="変数宣言の際に、記憶域として`thread_local`キーワードを指定することで、スレッドごとの静的記憶域に変数が保持される。" />
<link rel="alternate" type="application/atom+xml" title="Atom" href="https://cpprefjp.github.io/rss.xml" />
<link rel="apple-touch-icon" sizes="180x180" href="../../static/favicons/apple-touch-icon.png?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<link rel="icon" type="image/png" sizes="32x32" href="../../static/favicons/favicon-32x32.png?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<link rel="icon" type="image/png" sizes="16x16" href="../../static/favicons/favicon-16x16.png?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<link rel="manifest" href="../../manifest.json?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<meta name="theme-color" content="#f5f8fc">
<link rel="stylesheet" href="../../static/pygments/default.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<!-- <link rel="stylesheet" href="../../static/css/root.css"> -->
<link href="../../static/kunai/css/kunai-stage-0.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc" rel="stylesheet">
<link href="../../static/kunai/css/kunai-stage-1.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc" rel="stylesheet">
<link href="../../static/kunai/css/kunai-stage-2.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc" rel="stylesheet">
<link href="../../static/kunai/css/kunai-stage-3.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc" rel="stylesheet">
<script type="text/javascript" src="../../static/kunai/js/kunai-vendor.js?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc"></script>
<script type="text/javascript" src="../../static/kunai/js/kunai.js?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc"></script>
<script type="text/javascript">
document.addEventListener('DOMContentLoaded', function() {
var kn = new Kunai;
kn.cpprefjp();
});
</script>
</head>
<body>
<header data-kunai-mdinfo="{"meta": {"cpp": ["cpp11"], "alias": ["thread_local"]}, "sources": [{"id": "2a4599bfd3c0907e015d1b59d19a455faf2a9777", "source": "#include <iostream>\n#include <thread>\n#include <random>\n#include <cstdint>\n\n// \u7bc4\u56f2[min_inclusive, max_inclusive]\u3067\u30e9\u30f3\u30c0\u30e0\u4e00\u69d8\u5206\u5e03\u3059\u308b\u6574\u6570\u3092\u751f\u6210\u3059\u308b\u3002\n// \u30b9\u30ec\u30c3\u30c9\u3054\u3068\u306b\u4e71\u6570\u306e\u72b6\u614b\u3092\u6301\u3064\u3002\nint random_range(int min_inclusive, int max_inclusive)\n{\n std::random_device seed_gen;\n std::uint32_t seed = seed_gen();\n thread_local std::mt19937 engine(seed);\n std::uniform_int_distribution<int> dist(min_inclusive, max_inclusive);\n return dist(engine);\n}\n\nint main()\n{\n // \u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304b\u3089\u4e26\u884c\u306brandom_range()\u95a2\u6570\u3092\u547c\u3073\u51fa\u305b\u308b\n std::thread t1([]{\n int random_value = random_range(0, 100);\n\n // \u203bcout\u306b\u5bfe\u3059\u308b\u4e00\u5ea6\u306e\u66f8\u304d\u8fbc\u307f\u306f\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u3067\u3042\u308b\u305f\u3081\u30013\u3064\u306e\u66f8\u304d\u8fbc\u307f\u30921\u3064\u306b\u7d71\u5408\u3002\n std::cout << \"thread1 : \" + std::to_string(random_value) + \"\\n\";\n });\n\n std::thread t2([]{\n int random_value = random_range(0, 100);\n std::cout << \"thread2 : \" + std::to_string(random_value) + \"\\n\";\n });\n\n t1.join();\n t2.join();\n}\n"}], "page_id": ["lang", "cpp11", "thread_local_storage"]}">
<nav class="navbar navbar-default" role="navigation">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="../../index.html">
<div class="title-wrapper clearfix">
<div class="title">cpprefjp - C++日本語リファレンス</div>
</div>
</a>
</div>
<div class="collapse navbar-collapse" id="navbar-collapse">
<ul class="nav navbar-nav navbar-right">
<li>
<div class="google-search">
<script>
(function() {
var cx = '013316413321391058734:ji_u66hl7hq';
var gcse = document.createElement('script');
gcse.type = 'text/javascript';
gcse.async = true;
gcse.src = (document.location.protocol == 'https:' ? 'https:' : 'http:') +
'//www.google.com/cse/cse.js?cx=' + cx;
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(gcse, s);
})();
</script>
<div class="gcse-search"></div>
</div>
</li>
<li>
<a href="https://github.com/cpprefjp/site">GitHub Project</a>
</li>
</ul>
</div>
</div>
</nav>
</header>
<main id="main" role="main">
<div class="container-fluid">
<div class="row">
<div class="col-sm-9 col-sm-push-3" itemscope itemtype="http://schema.org/Article">
<div class="row">
<div class="col-sm-12 google-search-result">
<gcse:searchresults></gcse:searchresults>
</div>
</div>
<div class="row">
<div class="col-sm-12 content-header">
<ol class="breadcrumb">
<li itemscope itemtype="http://www.schema.org/SiteNavigationElement">
<span>
<a href="../../index.html" itemprop="url">
<i class="fa fa-fw fa-home"></i>
</a>
</span>
</li>
<li itemscope itemtype="http://www.schema.org/SiteNavigationElement">
<span>
<a href="../../lang.html" itemprop="url">
<span itemprop="name">言語機能</span>
</a>
</span>
</li>
<li itemscope itemtype="http://www.schema.org/SiteNavigationElement">
<span>
<a href="../../lang/cpp11.html" itemprop="url">
<span itemprop="name">C++11</span>
</a>
</span>
</li>
<li class="active" itemscope itemtype="http://www.schema.org/SiteNavigationElement">
<span>
<span itemprop="name">スレッドローカルストレージ [N2659]</span>
</span>
</li>
</ol>
<div class="crsearch"></div>
</div>
</div>
<div class="row">
<div class="col-sm-12 edit-button">
<p class="text-right"><small>
最終更新日時:
<time itemprop="datePublished" class="js-local-time"
datetime="2026-01-17T02:13:36+09:00">
2026年01月17日 02時13分36秒 (JST)
</time>
<br/>
<span itemprop="author" itemscope itemtype="http://schema.org/Person">
<span itemprop="name">yoh</span>
</span>
が更新
</small></p>
<script>
(function () {
// 最終更新日時を閲覧者のローカルタイムゾーンで表示し直す (issue #53 の正規化)。
// JS が無効な環境ではサーバ生成の JST 表記がそのまま残る。
function pad(n) { return (n < 10 ? '0' : '') + n; }
var els = document.querySelectorAll('time.js-local-time[datetime]');
for (var i = 0; i < els.length; i++) {
var el = els[i];
var d = new Date(el.getAttribute('datetime'));
if (isNaN(d.getTime())) { continue; }
var tz = '';
try {
var parts = new Intl.DateTimeFormat(undefined, { timeZoneName: 'short' }).formatToParts(d);
for (var j = 0; j < parts.length; j++) {
if (parts[j].type === 'timeZoneName') { tz = parts[j].value; break; }
}
} catch (e) {}
el.textContent = d.getFullYear() + '年' + pad(d.getMonth() + 1) + '月' + pad(d.getDate()) + '日 '
+ pad(d.getHours()) + '時' + pad(d.getMinutes()) + '分' + pad(d.getSeconds()) + '秒'
+ (tz ? ' (' + tz + ')' : '');
}
})();
</script>
<p class="text-right">
<a class="history" target="_blank" href="https://github.com/cpprefjp/site/commits/master/lang/cpp11/thread_local_storage.md">
<span class="fa fa-fw fa-clock-o fa-flip-horizontal"></span>履歴
</a>
<a class="edit" target="_blank" href="https://github.com/cpprefjp/site/edit/master/lang/cpp11/thread_local_storage.md">
<span class="fa fa-fw fa-pencil"></span>編集
</a>
</p>
</div>
</div>
<div class="row">
<div class="col-sm-12 content-body">
<h1 itemprop="name"><span class="token">スレッドローカルストレージ [N2659]</span><span class="cpp cpp11" title="C++11で追加">(C++11)</span></h1>
<div itemprop="articleBody"><p>
</p>
<p>
</p>
<p>このページはC++11に採用された言語機能の変更を解説しています。</p>
<p>のちのC++規格でさらに変更される場合があるため<a href="#relative-page">関連項目</a>を参照してください。</p>
<p>
</p>
<h2>概要</h2>
<p>変数宣言の際に、記憶域として<code>thread_local</code>キーワードを指定することで、スレッドごとの静的記憶域に変数が保持される。</p>
<p><code>static</code>キーワードを記憶域として使用した変数は、プログラムを通してひとつの状態を持ち、プログラム終了時に変数が破棄される。<code>thread_local</code>キーワードの場合はスレッドごとに状態を持ち、スレッド終了時に変数が破棄される。</p>
<p><div class="codehilite"><pre><span></span><code><span class="c1">// スレッドごとに、0から始まるIDを生成して返す関数</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">create_id</span><span class="p">()</span>
<span class="p">{</span>
<span class="w"> </span><span class="n"><a href="">thread_local</a></span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">current_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">current_id</span><span class="o">++</span><span class="p">;</span>
<span class="p">}</span>
<span class="c1">// 2つのスレッドそれぞれで、IDが0から始まる</span>
<span class="n"><a href="../../reference/thread/thread.html">std::thread</a></span><span class="w"> </span><span class="nf">t1</span><span class="p">([]{</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">id1</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">create_id</span><span class="p">();</span><span class="w"> </span><span class="c1">// id1 == 0</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">id2</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">create_id</span><span class="p">();</span><span class="w"> </span><span class="c1">// id2 == 1</span>
<span class="p">});</span>
<span class="n"><a href="../../reference/thread/thread.html">std::thread</a></span><span class="w"> </span><span class="nf">t2</span><span class="p">([]{</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">id1</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">create_id</span><span class="p">();</span><span class="w"> </span><span class="c1">// id1 == 0</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">id2</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">create_id</span><span class="p">();</span><span class="w"> </span><span class="c1">// id2 == 1</span>
<span class="p">});</span>
<span class="n"><a href="../../reference/thread/thread/join.html">t1.join()</a></span><span class="p">;</span>
<span class="n"><a href="../../reference/thread/thread/join.html">t2.join()</a></span><span class="p">;</span>
</code></pre></div>
</p>
<h2>仕様</h2>
<ul>
<li><code>thread_local</code>キーワードを記憶域として指定された変数は、「スレッド記憶域の有効期間 (thread storage duration)」を持つ。この記憶域を持つ変数は、スレッドの開始から終了までの有効期間を持つ。</li>
<li><code>thread_local</code>キーワードは、<code>static</code>と<code>extern</code>を除き、<code>register</code>といった他の記憶域キーワードと同時には使用できない。</li>
<li>スレッド終了時には、スレッド記憶域を持つ変数のデストラクタが呼び出される。</li>
<li>スレッド記憶域を持つ変数のデストラクタ、もしくは名前空間スコープを持つスレッド記憶域変数のコンストラクタで<a class="cpprefjp-defined-word" data-desc="問題が発生したときに、現在実行位置を過去に通過・記録した位置に戻し、文脈情報を添えて紐づけられた処理(例外ハンドラー)を呼び出す仕組み。またはその事態">例外</a>が送出された場合、スレッドを初期化する関数の関数tryブロックでは、その<a class="cpprefjp-defined-word" data-desc="問題が発生したときに、現在実行位置を過去に通過・記録した位置に戻し、文脈情報を添えて紐づけられた処理(例外ハンドラー)を呼び出す仕組み。またはその事態">例外</a>を捕捉できない。</li>
<li>プログラム終了時の動作は、<code><a href="../../reference/cstdlib/exit.html">std::exit()</a></code>関数と<code><a href="../../reference/cstdlib/quick_exit.html">std::quick_exit()</a></code>関数のページを参照。</li>
</ul>
<h2>例</h2>
<p><div class="yata" id="2a4599bfd3c0907e015d1b59d19a455faf2a9777"><div class="codehilite"><pre><span></span><code><span class="cp">#include <a href="../../reference/iostream.html"><iostream></a></span>
<span class="cp">#include <a href="../../reference/thread.html"><thread></a></span>
<span class="cp">#include <a href="../../reference/random.html"><random></a></span>
<span class="cp">#include <a href="../../reference/cstdint.html"><cstdint></a></span>
<span class="c1">// 範囲[min_inclusive, max_inclusive]でランダム一様分布する整数を生成する。</span>
<span class="c1">// スレッドごとに乱数の状態を持つ。</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">random_range</span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">min_inclusive</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">max_inclusive</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="n"><a href="../../reference/random/random_device.html">std::random_device</a></span><span class="w"> </span><span class="n">seed_gen</span><span class="p">;</span>
<span class="w"> </span><span class="n"><a href="../../reference/cstdint/uint32_t.html">std::uint32_t</a></span><span class="w"> </span><span class="n">seed</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">seed_gen</span><span class="p">();</span>
<span class="w"> </span><span class="n"><span style="color:#ff0000">thread_local</span></span><span class="w"> </span><span class="n"><a href="../../reference/random/mt19937.html">std::mt19937</a></span><span class="w"> </span><span class="n">engine</span><span class="p">(</span><span class="n">seed</span><span class="p">);</span>
<span class="w"> </span><span class="n"><a href="../../reference/random/uniform_int_distribution.html">std::uniform_int_distribution</a></span><span class="o"><</span><span class="kt">int</span><span class="o">></span><span class="w"> </span><span class="n">dist</span><span class="p">(</span><span class="n">min_inclusive</span><span class="p">,</span><span class="w"> </span><span class="n">max_inclusive</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">dist</span><span class="p">(</span><span class="n">engine</span><span class="p">);</span>
<span class="p">}</span>
<span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span>
<span class="p">{</span>
<span class="w"> </span><span class="c1">// 複数のスレッドから並行にrandom_range()関数を呼び出せる</span>
<span class="w"> </span><span class="n"><a href="../../reference/thread/thread.html">std::thread</a></span><span class="w"> </span><span class="n">t1</span><span class="p">([]{</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">random_value</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">random_range</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">100</span><span class="p">);</span>
<span class="w"> </span><span class="c1">// ※coutに対する一度の書き込みはスレッドセーフであるため、3つの書き込みを1つに統合。</span>
<span class="w"> </span><span class="n"><a href="../../reference/iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="s">"thread1 : "</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n"><a href="../../reference/string/to_string.html">std::to_string</a></span><span class="p">(</span><span class="n">random_value</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">;</span>
<span class="w"> </span><span class="p">});</span>
<span class="w"> </span><span class="n"><a href="../../reference/thread/thread.html">std::thread</a></span><span class="w"> </span><span class="n">t2</span><span class="p">([]{</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">random_value</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">random_range</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">100</span><span class="p">);</span>
<span class="w"> </span><span class="n"><a href="../../reference/iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="s">"thread2 : "</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n"><a href="../../reference/string/to_string.html">std::to_string</a></span><span class="p">(</span><span class="n">random_value</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">;</span>
<span class="w"> </span><span class="p">});</span>
<span class="w"> </span><span class="n"><a href="../../reference/thread/thread/join.html">t1.join()</a></span><span class="p">;</span>
<span class="w"> </span><span class="n"><a href="../../reference/thread/thread/join.html">t2.join()</a></span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div>
</div></p>
<h3>出力例</h3>
<p><pre><code>thread1 : 67
thread2 : 4
</code></pre></p>
<h2>この機能が必要になった背景・経緯</h2>
<p>マルチスレッドアプリケーションでは、スレッドごとにデータを一意に維持することがたびたび必要となる。これはスレッドローカルストレージと呼ばれ、多くのベンダーがスレッド記憶域の言語拡張を用意していた：</p>
<table border="1" bordercolor="#888" style="border-collapse:collapse">
<thead>
<tr>
<th>ベンダー</th>
<th>機能</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="https://www.gnu.org/" target="_blank">GNU</a></td>
<td><a href="https://gcc.gnu.org/onlinedocs/gcc-3.3.1/gcc/Thread-Local.html#Thread-Local" target="_blank">Thread-Local Storage</a></td>
</tr>
<tr>
<td><a href="http://www.hp.com/" target="_blank">HP</a></td>
<td>スレッドローカルストレージを指定する記憶クラス指定子が存在した。 例: <code>__declspec(__thread) int x = 0;</code></td>
</tr>
<tr>
<td><a href="http://www.ibm.com/" target="_blank">IBM</a></td>
<td>Thread-Local Storage in <a href="http://www-1.ibm.com/support/docview.wss?uid=swg27007322&aid=1" target="_blank">What's New in XL C/C++ V9.0</a></td>
</tr>
<tr>
<td><a href="http://www.ibm.com/" target="_blank">IBM</a></td>
<td><a href="https://www.ibm.com/support/knowledgecenter/ja/ssw_ibm_i_71/rzarg/thread.htm?view=embed" target="_blank">__thread ストレージ・クラス指定子</a></td>
</tr>
<tr>
<td><a href="http://www.intel.com/" target="_blank">Intel</a></td>
<td>GCC互換の<code>__thread</code>キーワードが存在した。</td>
</tr>
<tr>
<td><a href="https://www.microsoft.com/" target="_blank">Microsoft</a></td>
<td><a href="https://docs.microsoft.com/ja-JP/cpp/cpp/thread?view=vs-2019" target="_blank">__declspec thread</a></td>
</tr>
<tr>
<td><a href="https://www.oracle.com/index.html" target="_blank">Oracle</a>（旧Sun Microsystems）</td>
<td><a href="https://docs.oracle.com/cd/E37069_01/html/E37075/bkaeg.html" target="_blank">Thread-Local Storage</a></td>
</tr>
</tbody>
</table>
<p>各ベンダーのこれらの経験を標準C++に導入することとなった。</p>
<h2><a href="#relative-page" id="relative-page">関連項目</a></h2>
<ul>
<li><code><a href="../../reference/cstdlib/exit.html">exit</a></code></li>
<li><code><a href="../../reference/cstdlib/quick_exit.html">quick_exit</a></code></li>
<li><a href="../../article/lib/at_thread_exit.html"><code>_at_thread_exit</code>系の関数が存在している理由</a></li>
</ul>
<h2>参照</h2>
<ul>
<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1874.html" target="_blank">N1874 Thread-Local Storage</a></li>
<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1966.html" target="_blank">N1966 Thread-Local Storage</a></li>
<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2147.html" target="_blank">N2147 Thread-Local Storage</a></li>
<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2280.html" target="_blank">N2280 Thread-Local Storage</a></li>
<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2545.html" target="_blank">N2545 Thread-Local Storage</a></li>
<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2659.htm" target="_blank">N2659 Thread-Local Storage</a></li>
<li><a href="http://stackoverflow.com/a/29929949/463412" target="_blank">Why does Apple clang disallow C++11 <code>thread_local</code> when 'official' clang supports it - Stack Overflow</a><ul>
<li>Apple実装のClang（Xcode 7以下に付属のもの）が<code>thread_local</code>機能をサポートしない理由</li>
</ul>
</li>
</ul></div>
</div>
</div>
</div>
<div id="sidebar" class="col-sm-3 col-sm-pull-9">
</div>
</div>
</div>
</main>
<footer class="footer navbar navbar-default">
<div class="container-fluid">
<p><small>
本サイトの情報は、
<a href="https://creativecommons.org/licenses/by/4.0/deed.ja" rel="nofollow">クリエイティブ・コモンズ 表示 4.0 非移植 ライセンス(CC BY)</a>
の下に提供されています。
</small></p>
</div>
</footer>
</body>
</html>