{"id":533,"date":"2013-03-17T00:51:15","date_gmt":"2013-03-16T15:51:15","guid":{"rendered":"http:\/\/dev.activebasic.com\/egtra\/?p=533"},"modified":"2013-03-17T00:51:15","modified_gmt":"2013-03-16T15:51:15","slug":"%e9%85%8d%e5%88%97%e7%89%88shared_ptr%e3%81%a8%e9%9d%9e%e9%85%8d%e5%88%97%e7%89%88shared_ptr%e3%81%a8%e3%81%ae%e5%a4%89%e6%8f%9b","status":"publish","type":"post","link":"https:\/\/dev.activebasic.com\/egtra\/2013\/03\/17\/533\/","title":{"rendered":"\u914d\u5217\u7248shared_ptr\u3068\u975e\u914d\u5217\u7248shared_ptr\u3068\u306e\u5909\u63db"},"content":{"rendered":"<p>Boost 1.53\u304b\u3089\u306eshared_ptr&lt;T[]&gt;\u3084shared_ptr&lt;T[N]&gt;\u306f\u914d\u5217\u3067\u306a\u3044shared_ptr\u3068\u76f8\u4e92\u306b\u5909\u63db\u3067\u304d\u308b\u306e\u304c\u4fbf\u5229\u3067\u3059\u3002\u3053\u308c\u306fshared_array\u3067\u306f\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<pre lang=\"cpp\">\r\n\/\/ buffer\u306fboost::shared_ptr<char[]>\u578b\r\n\/\/ boost::shared_ptr<char[]> buffer(new char[size]);\u3068\u3057\u3066\u3082\u53ef\r\nauto buffer = boost::make_shared<char[]>(size);\r\nauto p = boost::reinterpret_pointer_cast<binary_data>(buffer);\r\n<\/pre>\n<p>\u4eca\u307e\u3067\u306f\u3053\u306e\u3088\u3046\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002boost::shared_array\u3068boost::shared_ptr\u3068\u306e\u5909\u63db\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u306a\u3044\u305f\u3081\u3001shared_ptr\u306b\u4e00\u5de5\u592b\u3057\u3066new[]\u3067\u5f97\u305f\u30dd\u30a4\u30f3\u30bf\u3092\u683c\u7d0d\u3059\u308b\u5fc5\u8981\u304c\u3042\u3063\u305f\u306e\u3067\u3059\u3002<\/p>\n<pre lang=\"cpp\">\r\nboost::shared_ptr<char> buffer(\r\n  new char[size], boost::checked_array_deleter<char>());\r\n\/\/ \u3042\u308b\u3044\u306f\u3053\u3061\u3089 (C++11)\r\n\/\/ boost::shared_ptr<char> buffer(\r\n\/\/   new char[size], std::default_delete<char[]>());\r\n\r\nauto p = boost::reinterpret_pointer_cast<binary_data>(buffer);\r\n<\/pre>\n<p>\u305d\u306e\u3088\u3046\u306a\u51e6\u7406\u306f\u3001\u305f\u3068\u3048\u3070\u3053\u3046\u3044\u3046\u98a8\u306b\u53ef\u5909\u9577\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u6271\u3046\u5834\u5408\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre lang=\"cpp\">\r\n#include <iostream>\r\n#include <cstring>\r\n#include <boost\/smart_ptr\/shared_ptr.hpp>\r\n#include <boost\/smart_ptr\/shared_array.hpp>\r\n#include <boost\/smart_ptr\/make_shared_array.hpp>\r\n\/\/#include <boost\/checked_delete.hpp>\r\n\r\nstruct binary_data\r\n{\r\n  int length;\r\n  char data[1]; \/\/ \u2190 \u3053\u3046\u3044\u3046\u306e\uff01\uff01\uff01\r\n};\r\n\r\nint main()\r\n{\r\n  const char* source = \"Quick brown fox ...\";\r\n  auto source_length = std::strlen(source);\r\n\r\n  auto size = sizeof (binary_data) - 1 + source_length;\r\n\r\n  \/\/ boost::shared_ptr<char> buffer(\r\n  \/\/   new char[size], boost::checked_array_deleter<char>());\r\n  boost::shared_ptr<char[]> buffer = boost::make_shared<char[]>(size);\r\n  auto p = boost::reinterpret_pointer_cast<binary_data>(buffer);\r\n\r\n  p->length = source_length;\r\n  std::memcpy(&p->data[0], source, source_length);\r\n  for (int i = 0; i < p->length; ++i)\r\n  {\r\n    std::cout << p->data[i];\r\n  }\r\n  std::cout << std::endl;\r\n}\r\n<\/pre>\n<p>\u4f59\u8ac7\u3067\u3059\u304c\u3001C99\u4ee5\u964d\u3060\u3068\u3001char data[];\u3068\u3044\u3046\u69cb\u6587\u304c\u3042\u308b\u3093\u3067\u3059\u3088\u306d\u3002C++11\u306b\u306f\u3084\u3063\u3066\u304d\u3066\u3044\u306a\u3044\u306f\u305a\u3067\u3059\u304c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Boost 1.53\u3067\u5c0e\u5165\u3055\u308c\u305f\u914d\u5217\u7248shared_ptr\u306f\u3001\u975e\u914d\u5217\u7248shared_ptr\u3068\u5909\u63db\u3067\u304d\u3066\u4fbf\u5229\u3068\u3044\u3046\u8a71\u3067\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[5],"tags":[45,243],"class_list":["post-533","post","type-post","status-publish","format-standard","hentry","category-cpp","tag-boost","tag-shared_ptr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - 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