Google C++ style guide<\/a>\uff09\u3002\u5982\u679c\u5f02\u5e38\u88ab\u7981\u7528\u4e86\uff0c\u6211\u4eec\u5c31\u6ca1\u6cd5\u4ece\u6784\u9020\u51fd\u6570\u672c\u8eab\u83b7\u77e5\u8d44\u6e90\u662f\u5426\u6210\u529f\u83b7\u53d6\uff0c\u90a3\u662f\u4e0d\u662f\u8bf4\u6211\u4eec\u6ca1\u6cd5\u4f7f\u7528RAII\u7279\u6027\u5462\uff1f<\/p>\n\u7b54\u6848\u662f\u5426\u5b9a\u7684\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u83b7\u53d6\u8d44\u6e90\u540e\uff0c\u7528\u5176\u4ed6\u7684\u7c7b\u51fd\u6570\u6765\u68c0\u67e5\u8d44\u6e90\u83b7\u53d6\u662f\u5426\u6210\u529f\u3002\u6bd4\u5982ostream::is_open()\u5c31\u53ef\u4ee5\u68c0\u67e5\u6587\u4ef6\u662f\u5426\u88ab\u6b63\u5e38\u6253\u5f00\u3002<\/p>\n
<\/p>\n
5. \u600e\u4e48\u7ed5\u5f00RAII<\/p>\n
\u5728C\u7b49\u4e0d\u63d0\u4f9bRAII\u652f\u6301\u7684\u8bed\u8a00\u91cc\uff0c\u53ef\u4ee5\u76f4\u63a5\u7ed5\u5f00RAII\uff0c\u5373\u4fdd\u8bc1\u83b7\u53d6\u8d44\u6e90\u540e\uff0c\u7a0b\u5e8f\u7684\u6bcf\u4e00\u4e2a\u51fa\u53e3\u90fd\u6709\u91ca\u653e\u8d44\u6e90\u7684\u8bed\u53e5\u3002<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u6709\u53ef\u80fd\u9020\u6210\u591a\u5904\u91cd\u590d\u7684\u8d44\u6e90\u91ca\u653e\u4ee3\u7801\uff0c\u6216\u8005\u4f7f\u7528goto\u8bed\u53e5\u628a\u6240\u6709\u7a0b\u5e8f\u8df3\u8f6c\u5230\u4e00\u5904\u8d44\u6e90\u91ca\u653e\u4ee3\u7801\u3002<\/p>\n
<\/p>\n
6. \u5b9e\u8df5\u4e2d\u600e\u4e48\u7528RAII<\/p>\n
\u5b9e\u8df5\u4e2d\u9664\u4e86\u628a\u8d44\u6e90\u83b7\u53d6\u7684\u8bed\u53e5\u5199\u5230\u6784\u9020\u51fd\u6570\uff0c\u628a\u8d44\u6e90\u91ca\u653e\u7684\u8bed\u53e5\u5199\u5230\u6790\u6784\u51fd\u6570\uff0c\u8fd8\u5e94\u5f53\u6ce8\u610f\uff1a<\/p>\n
1\uff09\u83b7\u53d6\u591a\u4e2a\u8d44\u6e90\u65f6\uff0c\u53ef\u4ee5\u5199\u5728\u591a\u4e2a\u7c7b\u7684\u6784\u9020\u51fd\u6570\u91cc\uff0c\u4f7f\u5f97\u6bcf\u4e00\u4e2a\u7c7b\u7684\u6784\u9020\u51fd\u6570\u5bf9\u5e94\u4e00\u4e2a\u8d44\u6e90\u3002\u8fd9\u6837\u5728\u4efb\u4f55\u8d44\u6e90\u83b7\u53d6\u5931\u8d25\u65f6\uff0c\u5df2\u7ecf\u83b7\u5f97\u7684\u8d44\u6e90\u4f1a\u5f97\u5230\u91ca\u653e<\/p>\n
2\uff09\u6709\u65f6\u5019\u83b7\u53d6\u8d44\u6e90\u5931\u8d25\u7b49\u4e8e\u7a0b\u5e8f\u5931\u8d25\uff08Fatal Condition\uff09\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u53ef\u4ee5\u76f4\u63a5\u9000\u51fa\uff08exit\uff09\uff0c\u628a\u6e05\u7406\u8d44\u6e90\u7684\u4efb\u52a1\u7559\u7ed9\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5bf9RAII\u7684\u601d\u8003 Some random thoughts about RAII \u5199\u7a0b\u5e8f\u65f6\u5e38\u5e38\u9700\u8981\u7533\u8bf7\u7cfb\u7edf\u8d44\u6e90\uff0c\u6bd4\u5982\u6253\u5f00\u6587\u4ef6\uff0c\u7533\u8bf7\u4e00\u5757\u5185\u5b58\u3002\u7533\u8bf7\u5230\u8fd9\u4e9b\u8d44\u6e90\u540e\uff0c\u5728\u7a0b\u5e8f\u9000\u51fa\u6216\u8005\u8d44\u6e90\u4f7f\u7528\u5b8c\u6bd5\u540e\uff0c\u5e94\u5f53\u6b63\u786e\u7684\u91ca\u653e\u3002\u5982\u679c\u4e0d\u80fd\u6b63\u786e\u91ca\u653e\uff0c\u4f1a\u9020\u6210\u4e00\u7cfb\u5217\u95ee\u9898\u3002\u6bd4\u5982\u7533\u8bf7\u7684\u5185\u5b58\u6ca1\u6709\u91ca\u653e\u9020\u6210\u5185\u5b58\u6cc4\u9732Memory Leak\uff0c\u7533\u8bf7\u7684\u8fdb\u7a0b\u9501\u6ca1\u6709\u88ab\u89e3\u9501Unlock\uff0c\u9020\u6210\u8fdb\u7a0b\u95f4\u7684\u6b7b\u9501DeadLock\u3002\u5728C++\u8bed\u8a00\u91cc\uff0c\u89e3\u51b3\u8fd9\u7c7b\u8d44\u6e90\u7ba1\u7406\u95ee\u9898\u7684\u7ba1\u7528\u624b\u6cd5\u662fRAII (Resource Acuiquistion Is Initialization) \u8fd9\u7bc7\u7b14\u8bb0\u662f\u5bf9RAII\u7684\u4e00\u70b9\u601d\u8003\u3002 1. \u4ec0\u4e48\u662fRAII \u7b80\u5355\u6765\u8bb2\uff0c\u628a\u83b7\u53d6\u8d44\u6e90\u7684\u4ee3\u7801\u653e\u5230\u7c7b\u7684\u6784\u9020\u51fd\u6570\u91cc\uff0c\u628a\u91ca\u653e\u8d44\u6e90\u7684\u4ee3\u7801\u653e\u5230\u6790\u6784\u51fd\u6570\u91cc\u3002\u6bd4\u5982\u7528ofstream file(“output.txt”) \u53ef\u4ee5\u6253\u5f00\u6587\u4ef6\uff0c\u5f53file\u53d8\u91cf\u4e0d\u8d77\u4f5c\u7528\u662f\uff0c\u6587\u4ef6\u4f1a\u88ab\u81ea\u52a8\u5173\u95ed\u3002 \u6bd4\u5982\u4e0b\u9762\u8fd9\u5f20\u56fe\uff08from\uff1aThe RAII Programming Idiom\uff09\uff0c\u770b\u770b\u8fd9\u91cc\u9762\u6709\u591a\u5c11\u5730\u65b9\u9700\u8981\u5199\u91ca\u653e\u8d44\u6e90\u7684\u4ee3\u7801\u3002\u5982\u679c\u4f7f\u7528RAII\uff0c\u8fd9\u4e9b\u5176\u5b9e\u5730\u65b9\u90fd\u4e0d\u7528\u7559\u4ee3\u7801\u3002 2. RAII\u7684\u4f18\u7f3a\u70b9 RAII\u7684\u597d\u5904\u662f\u5229\u7528C++\u8bed\u8a00\u4f18\u52bf\u5b89\u5168\u3001\u6b63\u786e\u7684\u7ba1\u7406\u8d44\u6e90\u3002\u540c\u65f6RAII\u662fC++\u5efa\u8bae\u7684\u8d44\u6e90\u83b7\u53d6\u65b9\u5f0f\uff0c\u8fd9\u79cd\u4ee3\u7801\u53ef\u4ee5\u88ab\u5e7f\u5927C++\u7528\u6237\u7406\u89e3\u3002 \u4e0d\u65b9\u4fbf\u4e4b\u5904\u662f\uff0c\u4f7f\u7528RAII\u6709\u4e00\u4e9b\u9677\u9631\u3002\u6bd4\u5982\u4e0d\u8981\u7528RAII\u4e00\u6b21\u83b7\u53d6\u591a\u4e2a\u8d44\u6e90\u3002 3.\u4e3a\u4ec0\u4e48C++\u6709RAII C++\u8bed\u8a00\u4fdd\u8bc1\u4e86\u4e00\u4e2a\u7c7b\u6784\u9020\u4e4b\u540e\uff0c\u6790\u6784\u51fd\u6570\u4f1a\u88ab\u81ea\u52a8\u8c03\u7528\u3002\u8fd9\u4e2a\u4f7f\u7528\u65b9\u5f0f\u4e0e\u8d44\u6e90\u7ba1\u7406\u7684\u65b9\u5f0f\u76f8\u4f3c\u3002\u56e0\u6b64\u53ef\u4ee5\u7528\u7c7b\u7684\u751f\u547d\u5468\u671f\u6765\u7ba1\u7406\u8d44\u6e90\u3002 4. \u4e3a\u4ec0\u4e48C\/Java\/Python\u6ca1\u6709RAII C\u8bed\u8a00\u6ca1\u6709\u539f\u751f\u7684\u6784\u9020\u548c\u6790\u6784\u51fd\u6570\uff0c\u83b7\u53d6\u7684\u8d44\u6e90\u4e0d\u80fd\u6709\u4efb\u4f55\u81ea\u52a8\u673a\u5236\u6765\u91ca\u653e\u3002 Java\/Python\u6709\u8bed\u8a00\u4e2d\u7684\u652f\u6301\uff0c\u5373Dispose Pattern\u3002\u4e3e\u4f8b\u6765\u8bf4\u5c31\u662f try…catch..finally\u8bed\u53e5\u3002\u4f7f\u7528\u8005\u53ea\u8981\u628a\u91ca\u653e\u8d44\u6e90\u7684\u8bed\u53e5\u5199\u5230finally\uff0c\u8d44\u6e90\u5c31\u4f1a\u88ab\u91ca\u653e\u3002 4. RAII \u548cException\u7684\u5173\u7cfb RAII\u548cException\u7d27\u5bc6\u76f8\u5173\uff0c\u66f4\u786e\u5207\u7684\u8bf4\uff0c\u6784\u9020\u51fd\u6570\u548c\u5f02\u5e38\u8fd9\u4e24\u4e2a\u7279\u6027\u5728\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u4e92\u76f8\u4f9d\u8d56\u3002 \u5bf9\u4e8e\u6784\u9020\u51fd\u6570\u6765\u8bf4\uff08\u83b7\u53d6\u8d44\u6e90\u7684\u8bed\u53e5\u5728\u6784\u9020\u51fd\u6570\u91cc\uff09\uff0c\u6784\u9020\u51fd\u6570\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u56e0\u6b64\u60f3\u77e5\u9053\u8d44\u6e90\u662f\u5426\u6210\u529f\u83b7\u53d6\u662f\u4e0d\u80fd\u4ece\u51fd\u6570\u8fd4\u56de\u503c\u6765\u5224\u65ad\u7684\uff0c\u552f\u4e00\u53ef\u4ee5\u7528\u7684\u624b\u6cd5\u662f\u5728\u8d44\u6e90\u83b7\u53d6\u5931\u8d25\u65f6\u629b\u51fa\u5f02\u5e38\u3002\u4e5f\u5c31\u662f\u8bf4\u6784\u9020\u51fd\u6570\u9700\u8981\u4f7f\u7528\u5f02\u5e38\u3002 \u53e6\u4e00\u65b9\u9762\uff0c\u4f7f\u7528\u5f02\u5e38\u4e4b\u540e\uff0c\u9700\u8981\u7528\u6784\u9020\u51fd\u6570\u6765\u7ba1\u7406\u8d44\u6e90\u3002\u56e0\u4e3a\u5f02\u5e38\u629b\u51fa\u4ee5\u540e\uff0c\u5f88\u53ef\u80fd\u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\u548c\u5f02\u5e38\u53d1\u751f\u7684\u4ee3\u7801\u4e0d\u5728\u4e00\u4e2a\u5c42\u6b21\uff08\u5f02\u5e38\u5728Call Stack\u4e0a\u9010\u5c42\u5411\u4e0a\uff09\u3002\u4e3a\u4e86\u5b9e\u73b0\u5f02\u5e38\u5b89\u5168\uff08Exception Safe\uff09\uff0c\u5e94\u8be5\u4f7f\u7528\u6784\u9020\u51fd\u6570\uff08\u53e6\u4e00\u4e2a\u9009\u62e9\u662f\u667a\u80fd\u6307\u9488\uff0c\u4f46\u667a\u80fd\u6307\u9488\u6709\u667a\u80fd\u6307\u9488\u7684\u95ee\u9898\uff0c\u8be6\u89c1C++FAQ\u7684\u8ba8\u8bba\uff09\u3002 \u5bf9\u5df2\u6709\u7684C++\u4ee3\u7801\u6765\u8bf4\uff0c\u5b9e\u73b0\u6216\u68c0\u67e5\u4ee3\u7801\u662f\u4e0d\u662f\u5f02\u5e38\u5b89\u5168\u4e0d\u662f\u4e00\u4e2a\u7684\u7b80\u5355\u4eba\u7269\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5f02\u5e38\u8fd9\u4e2a\u7279\u6027\u5f80\u5f80\u4f1a\u88ab\u7981\u7528\uff08\u6bd4\u5982Google C++ style guide\uff09\u3002\u5982\u679c\u5f02\u5e38\u88ab\u7981\u7528\u4e86\uff0c\u6211\u4eec\u5c31\u6ca1\u6cd5\u4ece\u6784\u9020\u51fd\u6570\u672c\u8eab\u83b7\u77e5\u8d44\u6e90\u662f\u5426\u6210\u529f\u83b7\u53d6\uff0c\u90a3\u662f\u4e0d\u662f\u8bf4\u6211\u4eec\u6ca1\u6cd5\u4f7f\u7528RAII\u7279\u6027\u5462\uff1f \u7b54\u6848\u662f\u5426\u5b9a\u7684\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u83b7\u53d6\u8d44\u6e90\u540e\uff0c\u7528\u5176\u4ed6\u7684\u7c7b\u51fd\u6570\u6765\u68c0\u67e5\u8d44\u6e90\u83b7\u53d6\u662f\u5426\u6210\u529f\u3002\u6bd4\u5982ostream::is_open()\u5c31\u53ef\u4ee5\u68c0\u67e5\u6587\u4ef6\u662f\u5426\u88ab\u6b63\u5e38\u6253\u5f00\u3002 5. […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,87],"tags":[55,115],"class_list":["post-455","post","type-post","status-publish","format-standard","hentry","category-code","category-thinking","tag-c","tag-raii"],"_links":{"self":[{"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/posts\/455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/comments?post=455"}],"version-history":[{"count":0,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/posts\/455\/revisions"}],"wp:attachment":[{"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/media?parent=455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/categories?post=455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhanxw.com\/blog\/wp-json\/wp\/v2\/tags?post=455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"RAII](\"http:\/\/www.hackcraft.net\/images\/raii\/fig2.png\")