{"id":644,"date":"2006-06-20T01:00:00","date_gmt":"2006-06-19T16:00:00","guid":{"rendered":"https:\/\/ecoop.net\/memo\/2006-06-20-1.html"},"modified":"2006-06-20T01:00:00","modified_gmt":"2006-06-19T16:00:00","slug":"2006-06-20-1","status":"publish","type":"post","link":"https:\/\/www.ecoop.net\/memo\/archives\/2006-06-20-1.html","title":{"rendered":"\u5909\u6570\u4ee3\u5165\u3068\u305d\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306b\u3064\u3044\u3066\u306e\u691c\u8a3c"},"content":{"rendered":"

\n\u5927\u3057\u305f\u3053\u3068\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3075\u3068\u6c17\u3065\u3044\u305f\u306e\u3067\u30e1\u30e2\u3057\u3066\u304a\u304d\u307e\u3059\u3002
\n 
\n\u691c\u8a3c\u74b0\u5883: PHP 4.4.2
\n\u6642\u9593, \u30e1\u30e2\u30ea\u91cf\u306e\u30ea\u30df\u30c3\u30c8\u306a\u3057
\n\u306a\u304a\u3001\u90fd\u5408\u306b\u3088\u308a memory_get_usage()<\/a> \u3067\u306f\u306a\u304f top \u30b3\u30de\u30f3\u30c9\u3067\u30e1\u30e2\u30ea\u6d88\u8cbb\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002
\n \n<\/p>\n

$n = 5; \/\/ sleep \u3059\u308b\u79d2\u6570
\n 
\necho “Started..\\n”;
\n$a = str_repeat(“a”, 1024 * 1024 * 10); \/\/ 10MB
\nsleep($n); \/\/ #\u4f7f\u7528\u91cf 13MB
\necho “Cloning \\$a into \\$b.\\n”;
\n$b = $a; \/\/ \u30b3\u30d4\u30fc
\nsleep($n); \/\/ #\u4f7f\u7528\u91cf..\u5909\u5316\u306a\u3057 \u2190\u3053\u306e\u6642\u70b9\u3067\u306f\u53c2\u7167($b=&$a)\u3068\u540c\u7b49
\necho “Modifing \\$a.\\n”;
\n$a{0} = ‘b’; \/\/ $a \u306e 0 \u6587\u5b57\u76ee\u3092 ‘b’ \u306b\u5909\u66f4
\nsleep($n); \/\/ #\u4f7f\u7528\u91cf..23MB \u2190\u4e00\u65b9\u304c\u5909\u66f4\u3055\u308c\u3066\u59cb\u3081\u3066\u30d0\u30c3\u30d5\u30a1\u304c\u8907\u88fd\u3055\u308c\u308b
\necho “Freeing \\$a.\\n”;
\n$a = null; \/\/ \u89e3\u653e
\nsleep($n); \/\/ #\u4f7f\u7528\u91cf..13MB
\necho “Referring \\$b for \\$c \\n”;
\n$c =& $b; \/\/ \u53c2\u7167
\nsleep($n); \/\/ #\u4f7f\u7528\u91cf..\u5909\u5316\u7121\u3057
\necho “Modifing \\$b.\\n”;
\n$b{0} = ‘c’; \/\/ $b \u306e 0 \u6587\u5b57\u76ee\u3092 ‘c’ \u306b\u5909\u66f4
\nsleep($n); \/\/ #\u4f7f\u7528\u91cf..\u5909\u5316\u7121\u3057
\necho “Freeing memory for \\$b (and also \\$c)\\n”;
\n$b = null; \/\/ \u89e3\u653e
\nsleep($n); \/\/ #\u4f7f\u7528\u91cf..3MB\n<\/p><\/blockquote>\n

 
\n\u3053\u306e\u691c\u8a3c\u3067\u308f\u304b\u308b\u306e\u306f\u3001\u5358\u7d14\u306a\u4ee3\u5165\u306e\u5834\u5408\u306f\u3001\u4ee3\u5165\u5143\u3001\u4ee3\u5165\u5148\u3044\u305a\u308c\u304b\u304c\u5909\u66f4\u3055\u308c\u308b\u307e\u3067\u306f\u53c2\u7167\u3068\u540c\u7b49\u306b\u51e6\u7406\u3059\u308b(\u3064\u307e\u308a\u30e1\u30e2\u30ea\u78ba\u4fdd\u3084 strcpy \u3092\u3057\u306a\u3044)\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002
\n 
\n\u4e0a\u306e\u4f8b\u306e\u3088\u3046\u306b\u5909\u6570\u306e\u5024\u3092\u6368\u3066\u305f\u308a unset \u3057\u305f\u308a\u3057\u3066\u660e\u793a\u7684\u306b\u30e1\u30e2\u30ea\u3092\u89e3\u653e\u3057\u3066\u3084\u3089\u306a\u304f\u3066\u3082\u3001\u5909\u6570\u304c\u95a2\u6570\u306e\u7d42\u4e86\u3067\u30b9\u30b3\u30fc\u30d7\u30a2\u30a6\u30c8\u3057\u305f\u6642\u70b9\u3067\u81ea\u52d5\u7684\u306b\u89e3\u653e\u3055\u308c\u307e\u3059\u3002
\n 
\n\u305f\u3060\u3057\u3001Chain of Repository Pattern \u306a\u3069\u3001\u30e1\u30bd\u30c3\u30c9\u3001\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u304c\u9023\u9396\u3059\u308b\u5834\u5408\u306f\u3001\u547c\u3073\u51fa\u3057\u5148\u306e\u95a2\u6570\u304c\u7d42\u4e86\u3059\u308b\u307e\u3067\u3001\u547c\u3073\u51fa\u3057\u5143\u306e\u95a2\u6570\u5185\u306e\u5909\u6570\u3082\u5b58\u5728\u3057\u7d9a\u3051\u308b\u4e8b\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002
\n \n<\/p>\n

$a = str_repeat(“a”, 1024 * 1024 * 10);
\n\/\/ 3 \u6bb5\u306e\u9023\u9396(\u203b1)
\n$o = new Chain(1,
\n  new Chain(2,
\n    new Chain(3, null)
\n  )
\n);
\n$o->handle($a); \/\/ \u9023\u9396\u5b9f\u884c\u3002
\n\/\/ \u2191\u3053\u3053\u3060\u3051\u3067\u6700\u7d42\u7684\u306b Chain \u306e\u6bb5\u6570 x strlen($a) \u30d0\u30a4\u30c8\u306e\u30e1\u30e2\u30ea\u3092\u6d88\u8cbb\u3059\u308b!!
\n 
\necho “Finished\\n”;sleep(6);
\necho substr($a, 0, 100).”\\n”;
\nexit;
\n\/\/ ——————————–
\n\/\/ Chain Of Repository \u30d1\u30bf\u30fc\u30f3\u306e\u7c21\u5358\u306a\u5b9f\u88c5
\nclass Chain{
\n   var $v;
\n   var $_next;
\n   function Chain($v, $next = null){
\n       $this->v = $v;
\n       $this->_next = $next;
\n   }
\n   function next(&$buf){
\n       if(!empty($this->_next)) $this->_next->handle($buf);
\n   }
\n   function handle(&$buf){
\n       echo “Step:{$this->v}\\n”;
\n       \/\/ $buf \u306b\u4f7f\u3063\u3066\u4f55\u3089\u304b\u306e\u51e6\u7406\u3092\u3057\u3001\u7d50\u679c\u3092 $res \u306b\u683c\u7d0d\u3002
\n       $res = $this->v.$buf;
\n       $buf = $res; \/\/ $buf \u3092\u51e6\u7406\u7d50\u679c\u306b\u7f6e\u304d\u63db\u3048\u3002
\n       sleep(5); \/\/ (\u203b2)
\n       $this->next($buf); \/\/ \u6b21\u306e\u51e6\u7406\u3078($res \u304c\u751f\u304d\u3066\u3044\u308b)\u3002
\n   }
\n}\n<\/p><\/blockquote>\n

 
\n\u3053\u306e Chain \u30af\u30e9\u30b9\u3067\u306f(\u203b1)\u3092\u91cd\u306d\u308c\u3070\u91cd\u306d\u308b\u307b\u3069\u30e1\u30e2\u30ea\u5229\u7528\u91cf\u304c\u5897\u3048\u7d9a\u3051\u3001handle \u304c\u5168\u3066\u5b8c\u4e86\u3059\u308b\u307e\u3067\u89e3\u653e\u3055\u308c\u306a\u3044\u3068\u3044\u3046\u4e00\u7a2e\u306e\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u304c\u767a\u751f\u3057\u3066\u3044\u307e\u3059\u3002
\n\u3053\u308c\u3092\u89e3\u6d88\u3059\u308b\u306b\u306f(\u203b2) \u306e\u7b87\u6240\u3067 $res = null \u306a\u3069\u3067\u89e3\u653e\u3092\u660e\u793a\u3057\u3066\u3084\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5927\u3057\u305f\u3053\u3068\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3075\u3068\u6c17\u3065\u3044\u305f\u306e\u3067\u30e1\u30e2\u3057\u3066\u304a\u304d\u307e\u3059\u3002   \u691c\u8a3c\u74b0\u5883: PHP 4.4.2 \u6642\u9593, \u30e1\u30e2\u30ea\u91cf\u306e\u30ea\u30df\u30c3\u30c8\u306a\u3057 \u306a\u304a\u3001\u90fd\u5408\u306b\u3088\u308a memory_get_usage() \u3067\u306f\u306a\u304f top \u30b3\u30de … \u7d9a\u304d\u3092\u8aad\u3080 \u5909\u6570\u4ee3\u5165\u3068\u305d\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306b\u3064\u3044\u3066\u306e\u691c\u8a3c<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[32],"class_list":["post-644","post","type-post","status-publish","format-standard","hentry","tag-php"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/644","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/comments?post=644"}],"version-history":[{"count":0,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/644\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/media?parent=644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/categories?post=644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/tags?post=644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}