{"id":926,"date":"2018-01-17T19:40:38","date_gmt":"2018-01-17T11:40:38","guid":{"rendered":"https:\/\/damogame.cn:15443\/wordpress\/?p=926"},"modified":"2018-01-17T19:40:38","modified_gmt":"2018-01-17T11:40:38","slug":"linux%e8%bf%9b%e7%a8%8b%e9%97%b4%e9%80%9a%e4%bf%a1-%e4%bd%bf%e7%94%a8%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/926","title":{"rendered":"Linux\u8fdb\u7a0b\u95f4\u901a\u4fe1\u2014\u2014\u4f7f\u7528\u5171\u4eab\u5185\u5b58"},"content":{"rendered":"<article>\n<h1 class=\"csdn_top\">Linux\u8fdb\u7a0b\u95f4\u901a\u4fe1\u2014\u2014\u4f7f\u7528\u5171\u4eab\u5185\u5b58<\/h1>\n<div class=\"article_bar clearfix\">\n<div class=\"artical_tag\"><span class=\"original\">\u539f\u521b\u00a0<\/span><span class=\"time\">2013\u5e7408\u670824\u65e5 10:26:39<\/span><\/div>\n<ul class=\"article_tags clearfix csdn-tracking-statistics tracking-click\" data-mod=\"popu_377\">\n<li class=\"tit\">\u6807\u7b7e\uff1a<\/li>\n<li><a href=\"http:\/\/so.csdn.net\/so\/search\/s.do?q=Linux&amp;t=blog\" target=\"_blank\" rel=\"noopener\">Linux<\/a>\u00a0\/<\/li>\n<li><a href=\"http:\/\/so.csdn.net\/so\/search\/s.do?q=%E8%BF%9B%E7%A8%8B%E9%97%B4%E9%80%9A%E4%BF%A1&amp;t=blog\" target=\"_blank\" rel=\"noopener\">\u8fdb\u7a0b\u95f4\u901a\u4fe1<\/a>\u00a0\/<\/li>\n<li><a href=\"http:\/\/so.csdn.net\/so\/search\/s.do?q=%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98&amp;t=blog\" target=\"_blank\" rel=\"noopener\">\u5171\u4eab\u5185\u5b58<\/a><\/li>\n<\/ul>\n<ul class=\"right_bar\">\n<li><button class=\"btn-noborder\"><i class=\"icon iconfont icon-read\"><\/i><span class=\"txt\">159340<\/span><\/button><\/li>\n<\/ul>\n<\/div>\n<div id=\"article_content\" class=\"article_content csdn-tracking-statistics tracking-click\" data-mod=\"popu_519\" data-dsm=\"post\">\n<div>\u4e0b\u9762\u5c06\u8bb2\u89e3\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u53e6\u4e00\u79cd\u65b9\u5f0f\uff0c\u4f7f\u7528\u5171\u4eab\u5185\u5b58\u3002<\/div>\n<div><\/div>\n<div>\u4e00\u3001\u4ec0\u4e48\u662f\u5171\u4eab\u5185\u5b58<\/div>\n<div>\u987e\u540d\u601d\u4e49\uff0c\u5171\u4eab\u5185\u5b58\u5c31\u662f\u5141\u8bb8\u4e24\u4e2a\u4e0d\u76f8\u5173\u7684\u8fdb\u7a0b\u8bbf\u95ee\u540c\u4e00\u4e2a\u903b\u8f91\u5185\u5b58\u3002\u5171\u4eab\u5185\u5b58\u662f\u5728\u4e24\u4e2a\u6b63\u5728\u8fd0\u884c\u7684\u8fdb\u7a0b\u4e4b\u95f4\u5171\u4eab\u548c\u4f20\u9012\u6570\u636e\u7684\u4e00\u79cd\u975e\u5e38\u6709\u6548\u7684\u65b9\u5f0f\u3002\u4e0d\u540c\u8fdb\u7a0b\u4e4b\u95f4\u5171\u4eab\u7684\u5185\u5b58\u901a\u5e38\u5b89\u6392\u4e3a\u540c\u4e00\u6bb5\u7269\u7406\u5185\u5b58\u3002\u8fdb\u7a0b\u53ef\u4ee5\u5c06\u540c\u4e00\u6bb5\u5171\u4eab\u5185\u5b58\u8fde\u63a5\u5230\u5b83\u4eec\u81ea\u5df1\u7684\u5730\u5740\u7a7a\u95f4\u4e2d\uff0c\u6240\u6709\u8fdb\u7a0b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5171\u4eab\u5185\u5b58\u4e2d\u7684\u5730\u5740\uff0c\u5c31\u597d\u50cf\u5b83\u4eec\u662f\u7531\u7528C\u8bed\u8a00\u51fd\u6570malloc\u5206\u914d\u7684\u5185\u5b58\u4e00\u6837\u3002\u800c\u5982\u679c\u67d0\u4e2a\u8fdb\u7a0b\u5411\u5171\u4eab\u5185\u5b58\u5199\u5165\u6570\u636e\uff0c\u6240\u505a\u7684\u6539\u52a8\u5c06\u7acb\u5373\u5f71\u54cd\u5230\u53ef\u4ee5\u8bbf\u95ee\u540c\u4e00\u6bb5\u5171\u4eab\u5185\u5b58\u7684\u4efb\u4f55\u5176\u4ed6\u8fdb\u7a0b\u3002<\/div>\n<div><\/div>\n<div>\u7279\u522b\u63d0\u9192\uff1a\u5171\u4eab\u5185\u5b58\u5e76\u672a\u63d0\u4f9b\u540c\u6b65\u673a\u5236\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u7b2c\u4e00\u4e2a\u8fdb\u7a0b\u7ed3\u675f\u5bf9\u5171\u4eab\u5185\u5b58\u7684\u5199\u64cd\u4f5c\u4e4b\u524d\uff0c\u5e76\u65e0\u81ea\u52a8\u673a\u5236\u53ef\u4ee5\u963b\u6b62\u7b2c\u4e8c\u4e2a\u8fdb\u7a0b\u5f00\u59cb\u5bf9\u5b83\u8fdb\u884c\u8bfb\u53d6\u3002\u6240\u4ee5\u6211\u4eec\u901a\u5e38\u9700\u8981\u7528\u5176\u4ed6\u7684\u673a\u5236\u6765\u540c\u6b65\u5bf9\u5171\u4eab\u5185\u5b58\u7684\u8bbf\u95ee\uff0c\u4f8b\u5982\u524d\u9762\u8bf4\u5230\u7684\u4fe1\u53f7\u91cf\u3002\u6709\u5173\u4fe1\u53f7\u91cf\u7684\u66f4\u591a\u5185\u5bb9\uff0c\u53ef\u4ee5\u67e5\u9605\u6211\u7684\u53e6\u4e00\u7bc7\u6587\u7ae0\uff1a<a href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10243617\" target=\"_blank\" rel=\"noopener\">Linux\u8fdb\u7a0b\u95f4\u901a\u4fe1\u2014\u2014\u4f7f\u7528\u4fe1\u53f7\u91cf<\/a><\/div>\n<div><\/div>\n<div>\u4e8c\u3001\u5171\u4eab\u5185\u5b58\u7684\u4f7f\u5f97<\/div>\n<div>\u4e0e\u4fe1\u53f7\u91cf\u4e00\u6837\uff0c\u5728Linux\u4e2d\u4e5f\u63d0\u4f9b\u4e86\u4e00\u7ec4\u51fd\u6570\u63a5\u53e3\u7528\u4e8e\u4f7f\u7528\u5171\u4eab\u5185\u5b58\uff0c\u800c\u4e14\u4f7f\u7528\u5171\u4eab\u5171\u5b58\u7684\u63a5\u53e3\u8fd8\u4e0e\u4fe1\u53f7\u91cf\u7684\u975e\u5e38\u76f8\u4f3c\uff0c\u800c\u4e14\u6bd4\u4f7f\u7528\u4fe1\u53f7\u91cf\u7684\u63a5\u53e3\u6765\u5f97\u7b80\u5355\u3002\u5b83\u4eec\u58f0\u660e\u5728\u5934\u6587\u4ef6 sys\/shm.h\u4e2d\u3002<\/div>\n<div><\/div>\n<div>1\u3001shmget\u51fd\u6570<\/div>\n<div>\u8be5\u51fd\u6570\u7528\u6765\u521b\u5efa\u5171\u4eab\u5185\u5b58\uff0c\u5b83\u7684\u539f\u578b\u4e3a\uff1a<\/div>\n<div>\n<div class=\"dp-highlighter bg_cpp\">\n<div class=\"bar\">\n<div class=\"tools\"><b>[cpp]<\/b>\u00a0<a class=\"ViewSource\" title=\"view plain\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">view plain<\/a><span class=\"tracking-ad\" data-mod=\"popu_168\">\u00a0<a class=\"CopyToClipboard\" title=\"copy\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">copy<\/a><\/span><\/p>\n<div><embed id=\"ZeroClipboardMovie_1\" src=\"http:\/\/static.blog.csdn.net\/scripts\/ZeroClipboard\/ZeroClipboard.swf\" type=\"application\/x-shockwave-flash\" width=\"16\" height=\"16\" align=\"middle\" name=\"ZeroClipboardMovie_1\" data-mce-fragment=\"1\"><\/embed><\/div>\n<\/div>\n<\/div>\n<ol class=\"dp-cpp\" start=\"1\">\n<li class=\"alt\"><span class=\"datatypes\">int<\/span>\u00a0shmget(key_t\u00a0key,\u00a0<span class=\"datatypes\">size_t<\/span>\u00a0size,\u00a0<span class=\"datatypes\">int<\/span>\u00a0shmflg);<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div>\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c\u4e0e\u4fe1\u53f7\u91cf\u7684semget\u51fd\u6570\u4e00\u6837\uff0c\u7a0b\u5e8f\u9700\u8981\u63d0\u4f9b\u4e00\u4e2a\u53c2\u6570key\uff08\u975e0\u6574\u6570\uff09\uff0c\u5b83\u6709\u6548\u5730\u4e3a\u5171\u4eab\u5185\u5b58\u6bb5\u547d\u540d\uff0cshmget\u51fd\u6570\u6210\u529f\u65f6\u8fd4\u56de\u4e00\u4e2a\u4e0ekey\u76f8\u5173\u7684\u5171\u4eab\u5185\u5b58\u6807\u8bc6\u7b26\uff08\u975e\u8d1f\u6574\u6570\uff09\uff0c\u7528\u4e8e\u540e\u7eed\u7684\u5171\u4eab\u5185\u5b58\u51fd\u6570\u3002\u8c03\u7528\u5931\u8d25\u8fd4\u56de-1.<\/div>\n<div><\/div>\n<div>\u4e0d\u76f8\u5173\u7684\u8fdb\u7a0b\u53ef\u4ee5\u901a\u8fc7\u8be5\u51fd\u6570\u7684\u8fd4\u56de\u503c\u8bbf\u95ee\u540c\u4e00\u5171\u4eab\u5185\u5b58\uff0c\u5b83\u4ee3\u8868\u7a0b\u5e8f\u53ef\u80fd\u8981\u4f7f\u7528\u7684\u67d0\u4e2a\u8d44\u6e90\uff0c\u7a0b\u5e8f\u5bf9\u6240\u6709\u5171\u4eab\u5185\u5b58\u7684\u8bbf\u95ee\u90fd\u662f\u95f4\u63a5\u7684\uff0c\u7a0b\u5e8f\u5148\u901a\u8fc7\u8c03\u7528shmget\u51fd\u6570\u5e76\u63d0\u4f9b\u4e00\u4e2a\u952e\uff0c\u518d\u7531\u7cfb\u7edf\u751f\u6210\u4e00\u4e2a\u76f8\u5e94\u7684\u5171\u4eab\u5185\u5b58\u6807\u8bc6\u7b26\uff08shmget\u51fd\u6570\u7684\u8fd4\u56de\u503c\uff09\uff0c\u53ea\u6709shmget\u51fd\u6570\u624d\u76f4\u63a5\u4f7f\u7528\u4fe1\u53f7\u91cf\u952e\uff0c\u6240\u6709\u5176\u4ed6\u7684\u4fe1\u53f7\u91cf\u51fd\u6570\u4f7f\u7528\u7531semget\u51fd\u6570\u8fd4\u56de\u7684\u4fe1\u53f7\u91cf\u6807\u8bc6\u7b26\u3002<\/div>\n<div><\/div>\n<div>\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0csize\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u6307\u5b9a\u9700\u8981\u5171\u4eab\u7684\u5185\u5b58\u5bb9\u91cf<\/div>\n<div><\/div>\n<div>\u7b2c\u4e09\u4e2a\u53c2\u6570\uff0cshmflg\u662f\u6743\u9650\u6807\u5fd7\uff0c\u5b83\u7684\u4f5c\u7528\u4e0eopen\u51fd\u6570\u7684mode\u53c2\u6570\u4e00\u6837\uff0c\u5982\u679c\u8981\u60f3\u5728key\u6807\u8bc6\u7684\u5171\u4eab\u5185\u5b58\u4e0d\u5b58\u5728\u65f6\uff0c\u521b\u5efa\u5b83\u7684\u8bdd\uff0c\u53ef\u4ee5\u4e0eIPC_CREAT\u505a\u6216\u64cd\u4f5c\u3002\u5171\u4eab\u5185\u5b58\u7684\u6743\u9650\u6807\u5fd7\u4e0e\u6587\u4ef6\u7684\u8bfb\u5199\u6743\u9650\u4e00\u6837\uff0c\u4e3e\u4f8b\u6765\u8bf4\uff0c0644,\u5b83\u8868\u793a\u5141\u8bb8\u4e00\u4e2a\u8fdb\u7a0b\u521b\u5efa\u7684\u5171\u4eab\u5185\u5b58\u88ab\u5185\u5b58\u521b\u5efa\u8005\u6240\u62e5\u6709\u7684\u8fdb\u7a0b\u5411\u5171\u4eab\u5185\u5b58\u8bfb\u53d6\u548c\u5199\u5165\u6570\u636e\uff0c\u540c\u65f6\u5176\u4ed6\u7528\u6237\u521b\u5efa\u7684\u8fdb\u7a0b\u53ea\u80fd\u8bfb\u53d6\u5171\u4eab\u5185\u5b58\u3002<\/div>\n<div><\/div>\n<div>2\u3001shmat\u51fd\u6570<\/div>\n<div>\u7b2c\u4e00\u6b21\u521b\u5efa\u5b8c\u5171\u4eab\u5185\u5b58\u65f6\uff0c\u5b83\u8fd8\u4e0d\u80fd\u88ab\u4efb\u4f55\u8fdb\u7a0b\u8bbf\u95ee\uff0cshmat\u51fd\u6570\u7684\u4f5c\u7528\u5c31\u662f\u7528\u6765\u542f\u52a8\u5bf9\u8be5\u5171\u4eab\u5185\u5b58\u7684\u8bbf\u95ee\uff0c\u5e76\u628a\u5171\u4eab\u5185\u5b58\u8fde\u63a5\u5230\u5f53\u524d\u8fdb\u7a0b\u7684\u5730\u5740\u7a7a\u95f4\u3002\u5b83\u7684\u539f\u578b\u5982\u4e0b\uff1a<\/div>\n<div>\n<div class=\"dp-highlighter bg_cpp\">\n<div class=\"bar\">\n<div class=\"tools\"><b>[cpp]<\/b>\u00a0<a class=\"ViewSource\" title=\"view plain\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">view plain<\/a><span class=\"tracking-ad\" data-mod=\"popu_168\">\u00a0<a class=\"CopyToClipboard\" title=\"copy\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">copy<\/a><\/span><\/p>\n<div><embed id=\"ZeroClipboardMovie_2\" src=\"http:\/\/static.blog.csdn.net\/scripts\/ZeroClipboard\/ZeroClipboard.swf\" type=\"application\/x-shockwave-flash\" width=\"16\" height=\"16\" align=\"middle\" name=\"ZeroClipboardMovie_2\" data-mce-fragment=\"1\"><\/embed><\/div>\n<\/div>\n<\/div>\n<ol class=\"dp-cpp\" start=\"1\">\n<li class=\"alt\"><span class=\"keyword\">void<\/span>\u00a0*shmat(<span class=\"datatypes\">int<\/span>\u00a0shm_id,\u00a0<span class=\"keyword\">const<\/span>\u00a0<span class=\"keyword\">void<\/span>\u00a0*shm_addr,\u00a0<span class=\"datatypes\">int<\/span>\u00a0shmflg);<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div>\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0cshm_id\u662f\u7531shmget\u51fd\u6570\u8fd4\u56de\u7684\u5171\u4eab\u5185\u5b58\u6807\u8bc6\u3002<\/div>\n<div>\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0cshm_addr\u6307\u5b9a\u5171\u4eab\u5185\u5b58\u8fde\u63a5\u5230\u5f53\u524d\u8fdb\u7a0b\u4e2d\u7684\u5730\u5740\u4f4d\u7f6e\uff0c\u901a\u5e38\u4e3a\u7a7a\uff0c\u8868\u793a\u8ba9\u7cfb\u7edf\u6765\u9009\u62e9\u5171\u4eab\u5185\u5b58\u7684\u5730\u5740\u3002<\/div>\n<div>\u7b2c\u4e09\u4e2a\u53c2\u6570\uff0cshm_flg\u662f\u4e00\u7ec4\u6807\u5fd7\u4f4d\uff0c\u901a\u5e38\u4e3a0\u3002<\/div>\n<div><\/div>\n<div>\u8c03\u7528\u6210\u529f\u65f6\u8fd4\u56de\u4e00\u4e2a\u6307\u5411\u5171\u4eab\u5185\u5b58\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u6307\u9488\uff0c\u5982\u679c\u8c03\u7528\u5931\u8d25\u8fd4\u56de-1.<\/div>\n<div><\/div>\n<div>3\u3001shmdt\u51fd\u6570<\/div>\n<div>\u8be5\u51fd\u6570\u7528\u4e8e\u5c06\u5171\u4eab\u5185\u5b58\u4ece\u5f53\u524d\u8fdb\u7a0b\u4e2d\u5206\u79bb\u3002\u6ce8\u610f\uff0c\u5c06\u5171\u4eab\u5185\u5b58\u5206\u79bb\u5e76\u4e0d\u662f\u5220\u9664\u5b83\uff0c\u53ea\u662f\u4f7f\u8be5\u5171\u4eab\u5185\u5b58\u5bf9\u5f53\u524d\u8fdb\u7a0b\u4e0d\u518d\u53ef\u7528\u3002\u5b83\u7684\u539f\u578b\u5982\u4e0b\uff1a<\/div>\n<div>\n<div class=\"dp-highlighter bg_cpp\">\n<div class=\"bar\">\n<div class=\"tools\"><b>[cpp]<\/b>\u00a0<a class=\"ViewSource\" title=\"view plain\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">view plain<\/a><span class=\"tracking-ad\" data-mod=\"popu_168\">\u00a0<a class=\"CopyToClipboard\" title=\"copy\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">copy<\/a><\/span><\/p>\n<div><embed id=\"ZeroClipboardMovie_3\" src=\"http:\/\/static.blog.csdn.net\/scripts\/ZeroClipboard\/ZeroClipboard.swf\" type=\"application\/x-shockwave-flash\" width=\"16\" height=\"16\" align=\"middle\" name=\"ZeroClipboardMovie_3\" data-mce-fragment=\"1\"><\/embed><\/div>\n<\/div>\n<\/div>\n<ol class=\"dp-cpp\" start=\"1\">\n<li class=\"alt\"><span class=\"datatypes\">int<\/span>\u00a0shmdt(<span class=\"keyword\">const<\/span>\u00a0<span class=\"keyword\">void<\/span>\u00a0*shmaddr);<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div>\u53c2\u6570shmaddr\u662fshmat\u51fd\u6570\u8fd4\u56de\u7684\u5730\u5740\u6307\u9488\uff0c\u8c03\u7528\u6210\u529f\u65f6\u8fd4\u56de0\uff0c\u5931\u8d25\u65f6\u8fd4\u56de-1.<\/div>\n<div><\/div>\n<div>4\u3001shmctl\u51fd\u6570<\/div>\n<div>\u4e0e\u4fe1\u53f7\u91cf\u7684semctl\u51fd\u6570\u4e00\u6837\uff0c\u7528\u6765\u63a7\u5236\u5171\u4eab\u5185\u5b58\uff0c\u5b83\u7684\u539f\u578b\u5982\u4e0b\uff1a<\/div>\n<div>\n<div class=\"dp-highlighter bg_cpp\">\n<div class=\"bar\">\n<div class=\"tools\"><b>[cpp]<\/b>\u00a0<a class=\"ViewSource\" title=\"view plain\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">view plain<\/a><span class=\"tracking-ad\" data-mod=\"popu_168\">\u00a0<a class=\"CopyToClipboard\" title=\"copy\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">copy<\/a><\/span><\/p>\n<div><embed id=\"ZeroClipboardMovie_4\" src=\"http:\/\/static.blog.csdn.net\/scripts\/ZeroClipboard\/ZeroClipboard.swf\" type=\"application\/x-shockwave-flash\" width=\"16\" height=\"16\" align=\"middle\" name=\"ZeroClipboardMovie_4\" data-mce-fragment=\"1\"><\/embed><\/div>\n<\/div>\n<\/div>\n<ol class=\"dp-cpp\" start=\"1\">\n<li class=\"alt\"><span class=\"datatypes\">int<\/span>\u00a0shmctl(<span class=\"datatypes\">int<\/span>\u00a0shm_id,\u00a0<span class=\"datatypes\">int<\/span>\u00a0command,\u00a0<span class=\"keyword\">struct<\/span>\u00a0shmid_ds\u00a0*buf);<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div>\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0cshm_id\u662fshmget\u51fd\u6570\u8fd4\u56de\u7684\u5171\u4eab\u5185\u5b58\u6807\u8bc6\u7b26\u3002<\/div>\n<div><\/div>\n<div>\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0ccommand\u662f\u8981\u91c7\u53d6\u7684\u64cd\u4f5c\uff0c\u5b83\u53ef\u4ee5\u53d6\u4e0b\u9762\u7684\u4e09\u4e2a\u503c \uff1a<\/div>\n<div>\u00a0 \u00a0 IPC_STAT\uff1a\u628ashmid_ds\u7ed3\u6784\u4e2d\u7684\u6570\u636e\u8bbe\u7f6e\u4e3a\u5171\u4eab\u5185\u5b58\u7684\u5f53\u524d\u5173\u8054\u503c\uff0c\u5373\u7528\u5171\u4eab\u5185\u5b58\u7684\u5f53\u524d\u5173\u8054\u503c\u8986\u76d6shmid_ds\u7684\u503c\u3002<\/div>\n<div>\u00a0 \u00a0 IPC_SET\uff1a\u5982\u679c\u8fdb\u7a0b\u6709\u8db3\u591f\u7684\u6743\u9650\uff0c\u5c31\u628a\u5171\u4eab\u5185\u5b58\u7684\u5f53\u524d\u5173\u8054\u503c\u8bbe\u7f6e\u4e3ashmid_ds\u7ed3\u6784\u4e2d\u7ed9\u51fa\u7684\u503c<\/div>\n<div>\u00a0 \u00a0 IPC_RMID\uff1a\u5220\u9664\u5171\u4eab\u5185\u5b58\u6bb5<\/div>\n<div><\/div>\n<div>\u7b2c\u4e09\u4e2a\u53c2\u6570\uff0cbuf\u662f\u4e00\u4e2a\u7ed3\u6784\u6307\u9488\uff0c\u5b83\u6307\u5411\u5171\u4eab\u5185\u5b58\u6a21\u5f0f\u548c\u8bbf\u95ee\u6743\u9650\u7684\u7ed3\u6784\u3002<\/div>\n<div>shmid_ds\u7ed3\u6784\u81f3\u5c11\u5305\u62ec\u4ee5\u4e0b\u6210\u5458\uff1a<\/div>\n<div><\/div>\n<div class=\"dp-highlighter bg_cpp\">\n<div class=\"bar\">\n<div class=\"tools\"><b>[cpp]<\/b>\u00a0<a class=\"ViewSource\" title=\"view plain\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">view plain<\/a><span class=\"tracking-ad\" data-mod=\"popu_168\">\u00a0<a class=\"CopyToClipboard\" title=\"copy\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">copy<\/a><\/span><\/p>\n<div><embed id=\"ZeroClipboardMovie_5\" src=\"http:\/\/static.blog.csdn.net\/scripts\/ZeroClipboard\/ZeroClipboard.swf\" type=\"application\/x-shockwave-flash\" width=\"16\" height=\"16\" align=\"middle\" name=\"ZeroClipboardMovie_5\" data-mce-fragment=\"1\"><\/embed><\/div>\n<\/div>\n<\/div>\n<ol class=\"dp-cpp\" start=\"1\">\n<li class=\"alt\"><span class=\"keyword\">struct<\/span>\u00a0shmid_ds<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0uid_t\u00a0shm_perm.uid;<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0uid_t\u00a0shm_perm.gid;<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0mode_t\u00a0shm_perm.mode;<\/li>\n<li class=\"\">};<\/li>\n<\/ol>\n<\/div>\n<div><\/div>\n<div>\u4e09\u3001\u4f7f\u7528\u5171\u4eab\u5185\u5b58\u8fdb\u884c\u8fdb\u7a0b\u95f4\u901a\u4fe1<\/div>\n<div>\u8bf4\u4e86\u8fd9\u4e48\u591a\uff0c\u53c8\u5230\u4e86\u5b9e\u6218\u7684\u65f6\u5019\u4e86\u3002\u4e0b\u9762\u5c31\u4ee5\u4e24\u4e2a\u4e0d\u76f8\u5173\u7684\u8fdb\u7a0b\u6765\u8bf4\u660e\u8fdb\u7a0b\u95f4\u5982\u4f55\u901a\u8fc7\u5171\u4eab\u5185\u5b58\u6765\u8fdb\u884c\u901a\u4fe1\u3002\u5176\u4e2d\u4e00\u4e2a\u6587\u4ef6shmread.c\u521b\u5efa\u5171\u4eab\u5185\u5b58\uff0c\u5e76\u8bfb\u53d6\u5176\u4e2d\u7684\u4fe1\u606f\uff0c\u53e6\u4e00\u4e2a\u6587\u4ef6shmwrite.c\u5411\u5171\u4eab\u5185\u5b58\u4e2d\u5199\u5165\u6570\u636e\u3002\u4e3a\u4e86\u65b9\u4fbf\u64cd\u4f5c\u548c\u6570\u636e\u7ed3\u6784\u7684\u7edf\u4e00\uff0c\u4e3a\u8fd9\u4e24\u4e2a\u6587\u4ef6\u5b9a\u4e49\u4e86\u76f8\u540c\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b9a\u4e49\u5728\u6587\u4ef6shmdata.c\u4e2d\u3002\u7ed3\u6784shared_use_st\u4e2d\u7684written\u4f5c\u4e3a\u4e00\u4e2a\u53ef\u8bfb\u6216\u53ef\u5199\u7684\u6807\u5fd7\uff0c\u975e0\uff1a\u8868\u793a\u53ef\u8bfb\uff0c0\u8868\u793a\u53ef\u5199\uff0ctext\u5219\u662f\u5185\u5b58\u4e2d\u7684\u6587\u4ef6\u3002<\/div>\n<div><\/div>\n<div>shmdata.h\u7684\u6e90\u4ee3\u7801\u5982\u4e0b\uff1a<\/div>\n<div>\n<div><\/div>\n<div class=\"dp-highlighter bg_cpp\">\n<div class=\"bar\">\n<div class=\"tools\"><b>[cpp]<\/b>\u00a0<a class=\"ViewSource\" title=\"view plain\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">view plain<\/a><span class=\"tracking-ad\" data-mod=\"popu_168\">\u00a0<a class=\"CopyToClipboard\" title=\"copy\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">copy<\/a><\/span><\/p>\n<div><embed id=\"ZeroClipboardMovie_6\" src=\"http:\/\/static.blog.csdn.net\/scripts\/ZeroClipboard\/ZeroClipboard.swf\" type=\"application\/x-shockwave-flash\" width=\"16\" height=\"16\" align=\"middle\" name=\"ZeroClipboardMovie_6\" data-mce-fragment=\"1\"><\/embed><\/div>\n<\/div>\n<\/div>\n<ol class=\"dp-cpp\" start=\"1\">\n<li class=\"alt\"><span class=\"preprocessor\">#ifndef\u00a0_SHMDATA_H_HEADER<\/span><\/li>\n<li class=\"\"><span class=\"preprocessor\">#define\u00a0_SHMDATA_H_HEADER<\/span><\/li>\n<li class=\"alt\"><\/li>\n<li class=\"\"><span class=\"preprocessor\">#define\u00a0TEXT_SZ\u00a02048<\/span><\/li>\n<li class=\"alt\"><\/li>\n<li class=\"\"><span class=\"keyword\">struct<\/span>\u00a0shared_use_st<\/li>\n<li class=\"alt\">{<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"datatypes\">int<\/span>\u00a0written;<span class=\"comment\">\/\/\u4f5c\u4e3a\u4e00\u4e2a\u6807\u5fd7\uff0c\u975e0\uff1a\u8868\u793a\u53ef\u8bfb\uff0c0\u8868\u793a\u53ef\u5199<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"datatypes\">char<\/span>\u00a0text[TEXT_SZ];<span class=\"comment\">\/\/\u8bb0\u5f55\u5199\u5165\u548c\u8bfb\u53d6\u7684\u6587\u672c<\/span><\/li>\n<li class=\"\">};<\/li>\n<li class=\"alt\"><\/li>\n<li class=\"\"><span class=\"preprocessor\">#endif<\/span><\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div>\u6e90\u6587\u4ef6shmread.c\u7684\u6e90\u4ee3\u7801\u5982\u4e0b\uff1a<\/div>\n<div>\n<div><\/div>\n<div class=\"dp-highlighter bg_cpp\">\n<div class=\"bar\">\n<div class=\"tools\"><b>[cpp]<\/b>\u00a0<a class=\"ViewSource\" title=\"view plain\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">view plain<\/a><span class=\"tracking-ad\" data-mod=\"popu_168\">\u00a0<a class=\"CopyToClipboard\" title=\"copy\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">copy<\/a><\/span><\/p>\n<div><embed id=\"ZeroClipboardMovie_7\" src=\"http:\/\/static.blog.csdn.net\/scripts\/ZeroClipboard\/ZeroClipboard.swf\" type=\"application\/x-shockwave-flash\" width=\"16\" height=\"16\" align=\"middle\" name=\"ZeroClipboardMovie_7\" data-mce-fragment=\"1\"><\/embed><\/div>\n<\/div>\n<\/div>\n<ol class=\"dp-cpp\" start=\"1\">\n<li class=\"alt\"><span class=\"preprocessor\">#include\u00a0&lt;unistd.h&gt;<\/span><\/li>\n<li class=\"\"><span class=\"preprocessor\">#include\u00a0&lt;stdlib.h&gt;<\/span><\/li>\n<li class=\"alt\"><span class=\"preprocessor\">#include\u00a0&lt;stdio.h&gt;<\/span><\/li>\n<li class=\"\"><span class=\"preprocessor\">#include\u00a0&lt;sys\/shm.h&gt;<\/span><\/li>\n<li class=\"alt\"><span class=\"preprocessor\">#include\u00a0&#8220;shmdata.h&#8221;<\/span><\/li>\n<li class=\"\"><\/li>\n<li class=\"alt\"><span class=\"datatypes\">int<\/span>\u00a0main()<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"datatypes\">int<\/span>\u00a0running\u00a0=\u00a01;<span class=\"comment\">\/\/\u7a0b\u5e8f\u662f\u5426\u7ee7\u7eed\u8fd0\u884c\u7684\u6807\u5fd7<\/span><\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">void<\/span>\u00a0*shm\u00a0=\u00a0NULL;<span class=\"comment\">\/\/\u5206\u914d\u7684\u5171\u4eab\u5185\u5b58\u7684\u539f\u59cb\u9996\u5730\u5740<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">struct<\/span>\u00a0shared_use_st\u00a0*shared;<span class=\"comment\">\/\/\u6307\u5411shm<\/span><\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"datatypes\">int<\/span>\u00a0shmid;<span class=\"comment\">\/\/\u5171\u4eab\u5185\u5b58\u6807\u8bc6\u7b26<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u521b\u5efa\u5171\u4eab\u5185\u5b58<\/span><\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0shmid\u00a0=\u00a0shmget((key_t)1234,\u00a0<span class=\"keyword\">sizeof<\/span>(<span class=\"keyword\">struct<\/span>\u00a0shared_use_st),\u00a00666|IPC_CREAT);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(shmid\u00a0==\u00a0-1)<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0fprintf(stderr,\u00a0<span class=\"string\">&#8220;shmget\u00a0failed\\n&#8221;<\/span>);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0exit(EXIT_FAILURE);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u5c06\u5171\u4eab\u5185\u5b58\u8fde\u63a5\u5230\u5f53\u524d\u8fdb\u7a0b\u7684\u5730\u5740\u7a7a\u95f4<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0shm\u00a0=\u00a0shmat(shmid,\u00a00,\u00a00);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(shm\u00a0==\u00a0(<span class=\"keyword\">void<\/span>*)-1)<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0fprintf(stderr,\u00a0<span class=\"string\">&#8220;shmat\u00a0failed\\n&#8221;<\/span>);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0exit(EXIT_FAILURE);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0printf(<span class=\"string\">&#8220;\\nMemory\u00a0attached\u00a0at\u00a0%X\\n&#8221;<\/span>,\u00a0(<span class=\"datatypes\">int<\/span>)shm);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u8bbe\u7f6e\u5171\u4eab\u5185\u5b58<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0shared\u00a0=\u00a0(<span class=\"keyword\">struct<\/span>\u00a0shared_use_st*)shm;<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0shared-&gt;written\u00a0=\u00a00;<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">while<\/span>(running)<span class=\"comment\">\/\/\u8bfb\u53d6\u5171\u4eab\u5185\u5b58\u4e2d\u7684\u6570\u636e<\/span><\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u6ca1\u6709\u8fdb\u7a0b\u5411\u5171\u4eab\u5185\u5b58\u5b9a\u6570\u636e\u6709\u6570\u636e\u53ef\u8bfb\u53d6<\/span><\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(shared-&gt;written\u00a0!=\u00a00)<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf(<span class=\"string\">&#8220;You\u00a0wrote:\u00a0%s&#8221;<\/span>,\u00a0shared-&gt;text);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0sleep(rand()\u00a0%\u00a03);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u8bfb\u53d6\u5b8c\u6570\u636e\uff0c\u8bbe\u7f6ewritten\u4f7f\u5171\u4eab\u5185\u5b58\u6bb5\u53ef\u5199<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0shared-&gt;written\u00a0=\u00a00;<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u8f93\u5165\u4e86end\uff0c\u9000\u51fa\u5faa\u73af\uff08\u7a0b\u5e8f\uff09<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(strncmp(shared-&gt;text,\u00a0<span class=\"string\">&#8220;end&#8221;<\/span>,\u00a03)\u00a0==\u00a00)<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0running\u00a0=\u00a00;<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">else<\/span><span class=\"comment\">\/\/\u6709\u5176\u4ed6\u8fdb\u7a0b\u5728\u5199\u6570\u636e\uff0c\u4e0d\u80fd\u8bfb\u53d6\u6570\u636e<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0sleep(1);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u628a\u5171\u4eab\u5185\u5b58\u4ece\u5f53\u524d\u8fdb\u7a0b\u4e2d\u5206\u79bb<\/span><\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(shmdt(shm)\u00a0==\u00a0-1)<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0fprintf(stderr,\u00a0<span class=\"string\">&#8220;shmdt\u00a0failed\\n&#8221;<\/span>);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0exit(EXIT_FAILURE);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u5220\u9664\u5171\u4eab\u5185\u5b58<\/span><\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(shmctl(shmid,\u00a0IPC_RMID,\u00a00)\u00a0==\u00a0-1)<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0fprintf(stderr,\u00a0<span class=\"string\">&#8220;shmctl(IPC_RMID)\u00a0failed\\n&#8221;<\/span>);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0exit(EXIT_FAILURE);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0exit(EXIT_SUCCESS);<\/li>\n<li class=\"\">}<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div>\u6e90\u6587\u4ef6shmwrite.c\u7684\u6e90\u4ee3\u7801\u5982\u4e0b\uff1a<\/div>\n<div>\n<div><\/div>\n<div class=\"dp-highlighter bg_cpp\">\n<div class=\"bar\">\n<div class=\"tools\"><b>[cpp]<\/b>\u00a0<a class=\"ViewSource\" title=\"view plain\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">view plain<\/a><span class=\"tracking-ad\" data-mod=\"popu_168\">\u00a0<a class=\"CopyToClipboard\" title=\"copy\" href=\"http:\/\/blog.csdn.net\/ljianhui\/article\/details\/10253345#\">copy<\/a><\/span><\/p>\n<div><embed id=\"ZeroClipboardMovie_8\" src=\"http:\/\/static.blog.csdn.net\/scripts\/ZeroClipboard\/ZeroClipboard.swf\" type=\"application\/x-shockwave-flash\" width=\"16\" height=\"16\" align=\"middle\" name=\"ZeroClipboardMovie_8\" data-mce-fragment=\"1\"><\/embed><\/div>\n<\/div>\n<\/div>\n<ol class=\"dp-cpp\" start=\"1\">\n<li class=\"alt\"><span class=\"preprocessor\">#include\u00a0&lt;unistd.h&gt;<\/span><\/li>\n<li class=\"\"><span class=\"preprocessor\">#include\u00a0&lt;stdlib.h&gt;<\/span><\/li>\n<li class=\"alt\"><span class=\"preprocessor\">#include\u00a0&lt;stdio.h&gt;<\/span><\/li>\n<li class=\"\"><span class=\"preprocessor\">#include\u00a0&lt;string.h&gt;<\/span><\/li>\n<li class=\"alt\"><span class=\"preprocessor\">#include\u00a0&lt;sys\/shm.h&gt;<\/span><\/li>\n<li class=\"\"><span class=\"preprocessor\">#include\u00a0&#8220;shmdata.h&#8221;<\/span><\/li>\n<li class=\"alt\"><\/li>\n<li class=\"\"><span class=\"datatypes\">int<\/span>\u00a0main()<\/li>\n<li class=\"alt\">{<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"datatypes\">int<\/span>\u00a0running\u00a0=\u00a01;<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">void<\/span>\u00a0*shm\u00a0=\u00a0NULL;<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">struct<\/span>\u00a0shared_use_st\u00a0*shared\u00a0=\u00a0NULL;<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"datatypes\">char<\/span>\u00a0buffer[BUFSIZ\u00a0+\u00a01];<span class=\"comment\">\/\/\u7528\u4e8e\u4fdd\u5b58\u8f93\u5165\u7684\u6587\u672c<\/span><\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"datatypes\">int<\/span>\u00a0shmid;<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u521b\u5efa\u5171\u4eab\u5185\u5b58<\/span><\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0shmid\u00a0=\u00a0shmget((key_t)1234,\u00a0<span class=\"keyword\">sizeof<\/span>(<span class=\"keyword\">struct<\/span>\u00a0shared_use_st),\u00a00666|IPC_CREAT);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(shmid\u00a0==\u00a0-1)<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0fprintf(stderr,\u00a0<span class=\"string\">&#8220;shmget\u00a0failed\\n&#8221;<\/span>);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0exit(EXIT_FAILURE);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u5c06\u5171\u4eab\u5185\u5b58\u8fde\u63a5\u5230\u5f53\u524d\u8fdb\u7a0b\u7684\u5730\u5740\u7a7a\u95f4<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0shm\u00a0=\u00a0shmat(shmid,\u00a0(<span class=\"keyword\">void<\/span>*)0,\u00a00);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(shm\u00a0==\u00a0(<span class=\"keyword\">void<\/span>*)-1)<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0fprintf(stderr,\u00a0<span class=\"string\">&#8220;shmat\u00a0failed\\n&#8221;<\/span>);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0exit(EXIT_FAILURE);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0printf(<span class=\"string\">&#8220;Memory\u00a0attached\u00a0at\u00a0%X\\n&#8221;<\/span>,\u00a0(<span class=\"datatypes\">int<\/span>)shm);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u8bbe\u7f6e\u5171\u4eab\u5185\u5b58<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0shared\u00a0=\u00a0(<span class=\"keyword\">struct<\/span>\u00a0shared_use_st*)shm;<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">while<\/span>(running)<span class=\"comment\">\/\/\u5411\u5171\u4eab\u5185\u5b58\u4e2d\u5199\u6570\u636e<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u6570\u636e\u8fd8\u6ca1\u6709\u88ab\u8bfb\u53d6\uff0c\u5219\u7b49\u5f85\u6570\u636e\u88ab\u8bfb\u53d6,\u4e0d\u80fd\u5411\u5171\u4eab\u5185\u5b58\u4e2d\u5199\u5165\u6587\u672c<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">while<\/span>(shared-&gt;written\u00a0==\u00a01)<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0sleep(1);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf(<span class=\"string\">&#8220;Waiting&#8230;\\n&#8221;<\/span>);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u5411\u5171\u4eab\u5185\u5b58\u4e2d\u5199\u5165\u6570\u636e<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf(<span class=\"string\">&#8220;Enter\u00a0some\u00a0text:\u00a0&#8220;<\/span>);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0fgets(buffer,\u00a0BUFSIZ,\u00a0stdin);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0strncpy(shared-&gt;text,\u00a0buffer,\u00a0TEXT_SZ);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u5199\u5b8c\u6570\u636e\uff0c\u8bbe\u7f6ewritten\u4f7f\u5171\u4eab\u5185\u5b58\u6bb5\u53ef\u8bfb<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0shared-&gt;written\u00a0=\u00a01;<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u8f93\u5165\u4e86end\uff0c\u9000\u51fa\u5faa\u73af\uff08\u7a0b\u5e8f\uff09<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(strncmp(buffer,\u00a0<span class=\"string\">&#8220;end&#8221;<\/span>,\u00a03)\u00a0==\u00a00)<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0running\u00a0=\u00a00;<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0<span class=\"comment\">\/\/\u628a\u5171\u4eab\u5185\u5b58\u4ece\u5f53\u524d\u8fdb\u7a0b\u4e2d\u5206\u79bb<\/span><\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0<span class=\"keyword\">if<\/span>(shmdt(shm)\u00a0==\u00a0-1)<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0{<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0fprintf(stderr,\u00a0<span class=\"string\">&#8220;shmdt\u00a0failed\\n&#8221;<\/span>);<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0exit(EXIT_FAILURE);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0}<\/li>\n<li class=\"\">\u00a0\u00a0\u00a0\u00a0sleep(2);<\/li>\n<li class=\"alt\">\u00a0\u00a0\u00a0\u00a0exit(EXIT_SUCCESS);<\/li>\n<li class=\"\">}<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div>\u518d\u6765\u770b\u770b\u8fd0\u884c\u7684\u7ed3\u679c\uff1a<\/div>\n<div><\/div>\n<div><img decoding=\"async\" src=\"http:\/\/img.blog.csdn.net\/20130824102546046?watermark\/2\/text\/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbGppYW5odWk=\/font\/5a6L5L2T\/fontsize\/400\/fill\/I0JBQkFCMA==\/dissolve\/70\/gravity\/SouthEast\" alt=\"\" \/><\/div>\n<div><\/div>\n<div><\/div>\n<div>\u5206\u6790\uff1a<\/div>\n<div>1\u3001\u7a0b\u5e8fshmread\u521b\u5efa\u5171\u4eab\u5185\u5b58\uff0c\u7136\u540e\u5c06\u5b83\u8fde\u63a5\u5230\u81ea\u5df1\u7684\u5730\u5740\u7a7a\u95f4\u3002\u5728\u5171\u4eab\u5185\u5b58\u7684\u5f00\u59cb\u5904\u4f7f\u7528\u4e86\u4e00\u4e2a\u7ed3\u6784struct_use_st\u3002\u8be5\u7ed3\u6784\u4e2d\u6709\u4e2a\u6807\u5fd7written\uff0c\u5f53\u5171\u4eab\u5185\u5b58\u4e2d\u6709\u5176\u4ed6\u8fdb\u7a0b\u5411\u5b83\u5199\u5165\u6570\u636e\u65f6\uff0c\u5171\u4eab\u5185\u5b58\u4e2d\u7684written\u88ab\u8bbe\u7f6e\u4e3a0\uff0c\u7a0b\u5e8f\u7b49\u5f85\u3002\u5f53\u5b83\u4e0d\u4e3a0\u65f6\uff0c\u8868\u793a\u6ca1\u6709\u8fdb\u7a0b\u5bf9\u5171\u4eab\u5185\u5b58\u5199\u5165\u6570\u636e\uff0c\u7a0b\u5e8f\u5c31\u4ece\u5171\u4eab\u5185\u5b58\u4e2d\u8bfb\u53d6\u6570\u636e\u5e76\u8f93\u51fa\uff0c\u7136\u540e\u91cd\u7f6e\u8bbe\u7f6e\u5171\u4eab\u5185\u5b58\u4e2d\u7684written\u4e3a0\uff0c\u5373\u8ba9\u5176\u53ef\u88abshmwrite\u8fdb\u7a0b\u5199\u5165\u6570\u636e\u3002<\/div>\n<div><\/div>\n<div>2\u3001\u7a0b\u5e8fshmwrite\u53d6\u5f97\u5171\u4eab\u5185\u5b58\u5e76\u8fde\u63a5\u5230\u81ea\u5df1\u7684\u5730\u5740\u7a7a\u95f4\u4e2d\u3002\u68c0\u67e5\u5171\u4eab\u5185\u5b58\u4e2d\u7684written\uff0c\u662f\u5426\u4e3a0\uff0c\u82e5\u4e0d\u662f\uff0c\u8868\u793a\u5171\u4eab\u5185\u5b58\u4e2d\u7684\u6570\u636e\u8fd8\u6ca1\u6709\u88ab\u5b8c\uff0c\u5219\u7b49\u5f85\u5176\u4ed6\u8fdb\u7a0b\u8bfb\u53d6\u5b8c\u6210\uff0c\u5e76\u63d0\u793a\u7528\u6237\u7b49\u5f85\u3002\u82e5\u5171\u4eab\u5185\u5b58\u7684written\u4e3a0\uff0c\u8868\u793a\u6ca1\u6709\u5176\u4ed6\u8fdb\u7a0b\u5bf9\u5171\u4eab\u5185\u5b58\u8fdb\u884c\u8bfb\u53d6\uff0c\u5219\u63d0\u793a\u7528\u6237\u8f93\u5165\u6587\u672c\uff0c\u5e76\u518d\u6b21\u8bbe\u7f6e\u5171\u4eab\u5185\u5b58\u4e2d\u7684written\u4e3a1\uff0c\u8868\u793a\u5199\u5b8c\u6210\uff0c\u5176\u4ed6\u8fdb\u7a0b\u53ef\u5bf9\u5171\u4eab\u5185\u5b58\u8fdb\u884c\u8bfb\u64cd\u4f5c\u3002<\/div>\n<div><\/div>\n<div>\u56db\u3001\u5173\u4e8e\u524d\u9762\u7684\u4f8b\u5b50\u7684\u5b89\u5168\u6027\u8ba8\u8bba<\/div>\n<div>\u8fd9\u4e2a\u7a0b\u5e8f\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u5f53\u6709\u591a\u4e2a\u7a0b\u5e8f\u540c\u65f6\u5411\u5171\u4eab\u5185\u5b58\u4e2d\u8bfb\u5199\u6570\u636e\u65f6\uff0c\u95ee\u9898\u5c31\u4f1a\u51fa\u73b0\u3002\u53ef\u80fd\u4f60\u4f1a\u8ba4\u4e3a\uff0c\u53ef\u4ee5\u6539\u53d8\u4e00\u4e0bwritten\u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u4f8b\u5982\uff0c\u53ea\u6709\u5f53written\u4e3a0\u65f6\u8fdb\u7a0b\u624d\u53ef\u4ee5\u5411\u5171\u4eab\u5185\u5b58\u5199\u5165\u6570\u636e\uff0c\u800c\u5f53\u4e00\u4e2a\u8fdb\u7a0b\u53ea\u6709\u5728written\u4e0d\u4e3a0\u65f6\u624d\u80fd\u5bf9\u5176\u8fdb\u884c\u8bfb\u53d6\uff0c\u540c\u65f6\u628awritten\u8fdb\u884c\u52a01\u64cd\u4f5c\uff0c\u8bfb\u53d6\u5b8c\u540e\u8fdb\u884c\u51cf1\u64cd\u4f5c\u3002\u8fd9\u5c31\u6709\u70b9\u50cf\u6587\u4ef6\u9501\u4e2d\u7684\u8bfb\u5199\u9501\u7684\u529f\u80fd\u3002\u548b\u770b\u4e4b\u4e0b\uff0c\u5b83\u4f3c\u4e4e\u80fd\u884c\u5f97\u901a\u3002\u4f46\u662f\u8fd9\u90fd\u4e0d\u662f\u539f\u5b50\u64cd\u4f5c\uff0c\u6240\u4ee5\u8fd9\u79cd\u505a\u6cd5\u662f\u884c\u4e0d\u80fd\u7684\u3002\u8bd5\u60f3\u5f53written\u4e3a0\u65f6\uff0c\u5982\u679c\u6709\u4e24\u4e2a\u8fdb\u7a0b\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u5185\u5b58\uff0c\u5b83\u4eec\u5c31\u4f1a\u53d1\u73b0written\u4e3a0\uff0c\u4e8e\u662f\u4e24\u4e2a\u8fdb\u7a0b\u90fd\u5bf9\u5176\u8fdb\u884c\u5199\u64cd\u4f5c\uff0c\u663e\u7136\u4e0d\u884c\u3002\u5f53written\u4e3a1\u65f6\uff0c\u6709\u4e24\u4e2a\u8fdb\u7a0b\u540c\u65f6\u5bf9\u5171\u4eab\u5185\u5b58\u8fdb\u884c\u8bfb\u64cd\u4f5c\u65f6\u4e5f\u662f\u5982\u4e9b\uff0c\u5f53\u8fd9\u4e24\u4e2a\u8fdb\u7a0b\u90fd\u8bfb\u53d6\u5b8c\u662f\uff0cwritten\u5c31\u53d8\u6210\u4e86-1.<\/div>\n<div><\/div>\n<div>\u8981\u60f3\u8ba9\u7a0b\u5e8f\u5b89\u5168\u5730\u6267\u884c\uff0c\u5c31\u8981\u6709\u4e00\u79cd\u8fdb\u7a0b\u540c\u6b65\u7684\u8fdb\u5236\uff0c\u4fdd\u8bc1\u5728\u8fdb\u5165\u4e34\u754c\u533a\u7684\u64cd\u4f5c\u662f\u539f\u5b50\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u524d\u9762\u6240\u8bb2\u7684\u4fe1\u53f7\u91cf\u6765\u8fdb\u884c\u8fdb\u7a0b\u7684\u540c\u6b65\u3002\u56e0\u4e3a\u4fe1\u53f7\u91cf\u7684\u64cd\u4f5c\u90fd\u662f\u539f\u5b50\u6027\u7684\u3002<\/div>\n<div><\/div>\n<div>\u4e94\u3001\u4f7f\u7528\u5171\u4eab\u5185\u5b58\u7684\u4f18\u7f3a\u70b9<\/div>\n<div>1\u3001\u4f18\u70b9\uff1a\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u4f7f\u7528\u5171\u4eab\u5185\u5b58\u8fdb\u884c\u8fdb\u7a0b\u95f4\u7684\u901a\u4fe1\u771f\u7684\u662f\u975e\u5e38\u65b9\u4fbf\uff0c\u800c\u4e14\u51fd\u6570\u7684\u63a5\u53e3\u4e5f\u7b80\u5355\uff0c\u6570\u636e\u7684\u5171\u4eab\u8fd8\u4f7f\u8fdb\u7a0b\u95f4\u7684\u6570\u636e\u4e0d\u7528\u4f20\u9001\uff0c\u800c\u662f\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\uff0c\u4e5f\u52a0\u5feb\u4e86\u7a0b\u5e8f\u7684\u6548\u7387\u3002\u540c\u65f6\uff0c\u5b83\u4e5f\u4e0d\u50cf\u533f\u540d\u7ba1\u9053\u90a3\u6837\u8981\u6c42\u901a\u4fe1\u7684\u8fdb\u7a0b\u6709\u4e00\u5b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\u539f<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-926","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/926","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=926"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/926\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=926"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=926"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=926"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}