{"published":"2012-10-16 00:00:00","image_url":null,"height":"190","title":"volatile\u5909\u6570\u3068\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3068\u306e\u95a2\u4fc2\u306b\u3064\u3044\u3066\u306e\u62bc\u3057\u554f\u7b54\uff08\u524d\u7de8\uff09","categories":["C++"],"version":"1.0","blog_url":"https://yohhoy.hatenadiary.jp/","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohhoy.hatenadiary.jp%2Fentry%2F20121016%2Fp1\" title=\"volatile\u5909\u6570\u3068\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3068\u306e\u95a2\u4fc2\u306b\u3064\u3044\u3066\u306e\u62bc\u3057\u554f\u7b54\uff08\u524d\u7de8\uff09 - yohhoy\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"yohhoy\u306e\u65e5\u8a18","width":"100%","author_url":"https://blog.hatena.ne.jp/yohhoy/","type":"rich","provider_name":"Hatena Blog","author_name":"yohhoy","description":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9eC++\u306evolatile\u5909\u6570\u304c\u30b9\u30ec\u30c3\u30c9\u9593\u306e\u540c\u671f\u6a5f\u69cb\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u304b\u5426\u304b\u3068\u3044\u3046\u8ad6\u70b9\u306b\u3064\u3044\u3066\u3001\u6709\u308a\u305d\u3046\u306a\u8cea\u554f\u3068\u305d\u306e\u7b54\u3048\u306b\u3064\u3044\u3066\u306e\u7c21\u6613\u30e1\u30e2\u3002\uff08\u81ea\u8eab\u306e\u601d\u8003\u6574\u7406\u7528\uff09\u7d50\u8ad6\uff1a\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u53ef\u642c\u6027\u304c\u7121\u304f\u3001\u672a\u5b9a\u7fa9\u52d5\u4f5c(undefined behavior)\u3092\u5f15\u304d\u8d77\u3053\u3059\u3002C++11\u3067\u306fvolatile\u5909\u6570\u3067\u306a\u304fatomic\u5909\u6570\u3092\u7528\u3044\u308b\u3079\u304d\u3002C++03\u4ee5\u524d\u3067\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u4f9d\u5b58\u306e\u4ed5\u7d44\u307f\u3092\u5229\u7528\u3059\u308b\u3002 volatile int running = 1; // \u51e6\u7406\u30b9\u30ec\u30c3\u30c9 void another_thread() { while (running) { // ??? //... } } // \u5236\u5fa1\u5074\u30b9\u2026","url":"https://yohhoy.hatenadiary.jp/entry/20121016/p1"}