{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkumagi.hatenadiary.org%2Fentry%2F20101227%2F1293441350\" title=\" - \u304f\u307e\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","url":"https://kumagi.hatenadiary.org/entry/20101227/1293441350","version":"1.0","blog_url":"https://kumagi.hatenadiary.org/","published":"2010-12-27 18:15:50","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/k/kumagi/20101227/20101227174630.jpg","categories":["boost","c++","lock"],"width":"100%","height":"190","title":"","provider_url":"https://hatena.blog","description":"Boost\u306b\u4ee5\u524d\u304b\u3089read-write\u30ed\u30c3\u30af\u306f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u305f\u3088\u3046\u3067\u3059\u304c\u30d0\u30b0\u304c\u3042\u3063\u305f\u3068\u304b\u3067\u6700\u8fd1\u306e\u7269\u3067\u306fupgrade_lock, upgrade_to_unique_lock\u306b\u3055\u3057\u5909\u308f\u3063\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u306e\u30ed\u30c3\u30af\u3068\u6bd4\u3079\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u51fa\u3084\u3059\u3044\u4e0a\u306b\u7d20\u6027\u306e\u826f\u3044\u8a2d\u8a08\u3060\u3068\u601d\u3046\u306e\u3067\u7d39\u4ecb\u3057\u3066\u307f\u3088\u3046\u3068\u601d\u3044\u307e\u3059\u3002 read lock read-lock\u3092\u3059\u308b\u5834\u5408\u306fshared_mutex\u3092\u5f15\u6570\u306bshared_lock\u3092\u304b\u3051\u3066\u3084\u308c\u3070\u3044\u3044\u3067\u3059\u3002 #include <boost/thread.hpp> using namespace boost; shared_mutex mutex; void reader(){ \u2026","author_name":"kumagi","provider_name":"Hatena Blog","blog_title":"\u304f\u307e\u30e1\u30e2","author_url":"https://blog.hatena.ne.jp/kumagi/"}