{"id":96484,"date":"2026-08-27T18:48:32","date_gmt":"2026-08-27T10:48:32","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/96484.html"},"modified":"2026-08-27T18:48:32","modified_gmt":"2026-08-27T10:48:32","slug":"linux%e5%85%a5%e9%97%a8day31%ef%bc%88%e7%ba%bf%e7%a8%8b%e5%88%86%e7%a6%bb%e5%b1%9e%e6%80%a7%e3%80%81%e4%ba%92%e6%96%a5%e5%90%8c%e6%ad%a5%e3%80%81%e6%ad%bb%e9%94%81%e8%af%a6%e8%a7%a3%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/96484.html","title":{"rendered":"Linux\u5165\u95e8DAY31\uff08\u7ebf\u7a0b\u5206\u79bb\u5c5e\u6027\u3001\u4e92\u65a5\u540c\u6b65\u3001\u6b7b\u9501\u8be6\u89e3\uff09"},"content":{"rendered":"<p>#Linux #C\u8bed\u8a00 #\u591a\u7ebf\u7a0b #\u5d4c\u5165\u5f0f\u5f00\u53d1 #\u4e92\u65a5\u9501<\/p>\n<h3>\u524d\u8a00<\/h3>\n<p>\u672c\u7bc7\u63a5\u7eed\u524d\u9762 Linux \u8fdb\u7a0b\u7ebf\u7a0b\u77e5\u8bc6\u70b9&#xff0c;\u91cd\u70b9\u8bb2\u89e3\u7ebf\u7a0b\u5206\u79bb \/ \u975e\u5206\u79bb\u5c5e\u6027\u3001pthread_join \u56de\u6536\u3001\u4e92\u65a5\u9501\u3001\u4fe1\u53f7\u91cf\u540c\u6b65\u3001\u6b7b\u9501\u4ea7\u751f\u6761\u4ef6\u4ee5\u53ca\u89c4\u907f\u65b9\u6848&#xff0c;\u662f\u591a\u7ebf\u7a0b\u5f00\u53d1\u9ad8\u9891\u8003\u70b9\u4e0e\u5de5\u7a0b\u5b9e\u8df5\u5fc5\u638c\u63e1\u5185\u5bb9\u3002\u7f16\u8bd1\u7ebf\u7a0b\u4ee3\u7801\u52a1\u5fc5\u589e\u52a0\u7f16\u8bd1\u94fe\u63a5\u53c2\u6570&#xff1a;-pthread\u3002<\/p>\n<h3>\u4e00\u3001\u7ebf\u7a0b\u7684\u5206\u79bb\u5c5e\u6027\u4e0e\u975e\u5206\u79bb\u5c5e\u6027<\/h3>\n<p>\u7ebf\u7a0b\u6709\u4e24\u79cd\u5c5e\u6027&#xff1a;\u975e\u5206\u79bb\u5c5e\u6027&#xff08;\u9ed8\u8ba4&#xff09;\u3001\u5206\u79bb\u5c5e\u6027&#xff0c;\u51b3\u5b9a\u7ebf\u7a0b\u7ed3\u675f\u540e\u8d44\u6e90\u7531\u8c01\u56de\u6536\u3002<\/p>\n<h4>1. \u975e\u5206\u79bb\u5c5e\u6027&#xff08;\u7cfb\u7edf\u9ed8\u8ba4&#xff09;<\/h4>\n<ul>\n<li>\u7ebf\u7a0b\u7ed3\u675f\u4e4b\u540e&#xff0c;\u7ebf\u7a0b\u7684\u6808\u3001\u7ebf\u7a0b\u63cf\u8ff0\u7b26\u7b49\u8d44\u6e90\u4e0d\u4f1a\u81ea\u52a8\u91ca\u653e&#xff0c;\u4f1a\u6b8b\u7559\u5728\u5185\u6838\u4e2d&#xff0c;\u9020\u6210\u8d44\u6e90\u6cc4\u9732\u3002<\/li>\n<li>\u5fc5\u987b\u7531\u53e6\u5916\u4e00\u4e2a\u7ebf\u7a0b\u8c03\u7528 pthread_join() \u8fdb\u884c\u963b\u585e\u56de\u6536\u8d44\u6e90\u3002<\/li>\n<\/ul>\n<p>int pthread_join(pthread_t thread, void **retval);<\/p>\n<p>\u53c2\u6570\u8bf4\u660e<\/p>\n<ul>\n<li>thread&#xff1a;\u8981\u56de\u6536\u7684\u7ebf\u7a0b ID<\/li>\n<li>retval&#xff1a;\u63a5\u6536\u7ebf\u7a0b\u9000\u51fa\u8fd4\u56de\u503c&#xff1b;\u4e0d\u5173\u5fc3\u8fd4\u56de\u7ed3\u679c\u76f4\u63a5\u586b NULL<\/li>\n<\/ul>\n<p>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de 0&#xff1b;\u5931\u8d25\u8fd4\u56de\u975e 0 \u9519\u8bef\u7801\u3002<\/p>\n<p>\u7279\u70b9&#xff1a;\u8c03\u7528 pthread_join \u7684\u7ebf\u7a0b\u4f1a\u963b\u585e\u7b49\u5f85\u76ee\u6807\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5&#xff0c;\u76ee\u6807\u7ebf\u7a0b\u4e0d\u7ed3\u675f&#xff0c;join \u51fd\u6570\u4e0d\u4f1a\u8fd4\u56de\u3002\u9002\u5408\u9700\u8981\u7b49\u5f85\u5b50\u7ebf\u7a0b\u6267\u884c\u5b8c\u518d\u7ee7\u7eed\u4e1a\u52a1\u903b\u8f91\u7684\u573a\u666f\u3002<\/p>\n<h4>2. \u5206\u79bb\u5c5e\u6027<\/h4>\n<p>\u8bbe\u7f6e\u6210\u5206\u79bb\u5c5e\u6027\u4e4b\u540e&#xff1a;\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\u9000\u51fa\u65f6&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u81ea\u52a8\u56de\u6536\u8be5\u7ebf\u7a0b\u5168\u90e8\u8d44\u6e90&#xff0c;\u4e0d\u9700\u8981\u3001\u4e5f\u4e0d\u80fd\u8c03\u7528 pthread_join \u53bb\u56de\u6536\u3002<\/p>\n<p>int pthread_detach(pthread_t tid);<\/p>\n<ul>\n<li>tid&#xff1a;\u9700\u8981\u8bbe\u7f6e\u5206\u79bb\u5c5e\u6027\u7684\u7ebf\u7a0b ID<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f 0&#xff0c;\u5931\u8d25\u975e 0\u3002<\/li>\n<\/ul>\n<p>\u2705 \u4f7f\u7528\u573a\u666f&#xff1a;\u4e3b\u7ebf\u7a0b\u4e0d\u9700\u8981\u7b49\u5f85\u5b50\u7ebf\u7a0b\u5b8c\u6210&#xff0c;\u5b50\u7ebf\u7a0b\u72ec\u7acb\u6267\u884c\u4efb\u52a1&#xff0c;\u4e0d\u9700\u8981\u83b7\u53d6\u8fd4\u56de\u503c\u3002<\/p>\n<p>\u6ce8\u610f&#xff1a;\u4e00\u4e2a\u7ebf\u7a0b\u4e0d\u80fd\u65e2\u88ab detach \u5206\u79bb&#xff0c;\u53c8\u8c03\u7528 pthread_join&#xff0c;\u4f1a\u62a5\u9519\u3002<\/p>\n<h4>\u7ebf\u7a0b\u9000\u51fa\u7684\u4e09\u79cd\u65b9\u5f0f<\/h4>\n<li>\u7ebf\u7a0b\u4efb\u52a1\u51fd\u6570\u5185\u90e8\u4f7f\u7528 return&#xff1b;<\/li>\n<li>\u8c03\u7528 pthread_exit(void *retval) \u4e3b\u52a8\u9000\u51fa\u5f53\u524d\u7ebf\u7a0b&#xff1b;<\/li>\n<li>\u8fdb\u7a0b\u6574\u4f53\u9000\u51fa&#xff0c;\u8be5\u8fdb\u7a0b\u5185\u6240\u6709\u7ebf\u7a0b\u5168\u90e8\u76f4\u63a5\u9500\u6bc1\u3002<\/li>\n<p>\u26a0\ufe0f\u5751\u70b9&#xff1a;\u5982\u679c main \u4e3b\u7ebf\u7a0breturn 0\u76f4\u63a5\u9000\u51fa&#xff0c;\u6574\u4e2a\u8fdb\u7a0b\u9500\u6bc1&#xff0c;\u8fd8\u5728\u8fd0\u884c\u7684\u5b50\u7ebf\u7a0b\u4f1a\u76f4\u63a5\u88ab\u6740\u6b7b&#xff0c;\u6765\u4e0d\u53ca\u5b8c\u6210\u4e1a\u52a1\u3002<\/p>\n<h3>\u4e8c\u3001\u7ebf\u7a0b\u4e34\u754c\u8d44\u6e90\u4e0e\u7ade\u6001\u95ee\u9898<\/h3>\n<h4>\u4e34\u754c\u8d44\u6e90<\/h4>\n<p>\u591a\u4e2a\u7ebf\u7a0b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u7684\u516c\u5171\u8d44\u6e90&#xff0c;\u4f8b\u5982&#xff1a;\u5168\u5c40\u53d8\u91cf\u3001\u5168\u5c40\u961f\u5217\u3001\u516c\u5171\u6587\u4ef6\u3001\u6570\u636e\u5e93\u3002<\/p>\n<h4>\u4e34\u754c\u533a<\/h4>\n<p>\u8bbf\u95ee\u4e34\u754c\u8d44\u6e90\u7684\u90a3\u4e00\u6bb5\u4ee3\u7801\u5757\u3002<\/p>\n<p>\u591a\u7ebf\u7a0b\u540c\u65f6\u8bfb\u5199\u4e34\u754c\u8d44\u6e90\u4f1a\u53d1\u751f\u6570\u636e\u7ade\u4e89&#xff08;\u7ade\u6001&#xff09;&#xff1a;\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bfb\u6539\u5199\u540c\u4e00\u4e2a\u53d8\u91cf&#xff0c;\u8fd0\u7b97\u7ed3\u679c\u9519\u4e71\u3002 \u793a\u4f8b&#xff1a;\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u5bf9\u540c\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf\u505a\u81ea\u589e&#xff0c;\u9884\u671f\u7d2f\u52a0 10000&#xff0c;\u5b9e\u9645\u7ed3\u679c\u8fdc\u5c0f\u4e8e\u9884\u671f\u3002<\/p>\n<p>\u89e3\u51b3\u7ade\u4e89\u95ee\u9898&#xff1a;\u4e92\u65a5\u9501\u4fdd\u8bc1\u540c\u4e00\u65f6\u95f4&#xff0c;\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u8fdb\u5165\u4e34\u754c\u533a\u6267\u884c\u3002<\/p>\n<h3>\u4e09\u3001\u4e92\u65a5\u9501 pthread_mutex_t&#xff08;\u7ebf\u7a0b\u4e92\u65a5&#xff09;<\/h3>\n<p>\u4e92\u65a5\u9501\u4f5c\u7528&#xff1a;\u5b9e\u73b0\u7ebf\u7a0b\u4e92\u65a5\u8bbf\u95ee\u4e34\u754c\u8d44\u6e90&#xff0c;\u4fdd\u8bc1\u4e34\u754c\u533a\u4ee3\u7801\u539f\u5b50\u6267\u884c\u3002<\/p>\n<h4>\u4e92\u65a5\u9501\u5b8c\u6574\u6d41\u7a0b<\/h4>\n<li>\u5b9a\u4e49\u9501\u5bf9\u8c61&#xff1a;pthread_mutex_t mutex;<\/li>\n<li>\u521d\u59cb\u5316\u4e92\u65a5\u9501 pthread_mutex_init()<\/li>\n<li>\u8bbf\u95ee\u4e34\u754c\u533a\u524d&#xff1a;pthread_mutex_lock()\u3010\u963b\u585e\u52a0\u9501\u3011<\/li>\n<li>\u6267\u884c\u4e1a\u52a1\u4e34\u754c\u533a\u4ee3\u7801<\/li>\n<li>\u8bbf\u95ee\u5b8c\u6210&#xff1a;pthread_mutex_unlock() \u89e3\u9501<\/li>\n<li>\u9501\u4e0d\u518d\u4f7f\u7528&#xff1a;pthread_mutex_destroy()\u9500\u6bc1\u9501<\/li>\n<p>\/\/\u521d\u59cb\u5316\u9501<br \/>\nint pthread_mutex_init(pthread_mutex_t *restrict mutex,<br \/>\n           const pthread_mutexattr_t *restrict attr);<br \/>\n\/\/attr\u586bNULL\u4ee3\u8868\u4f7f\u7528\u9501\u7684\u9ed8\u8ba4\u5c5e\u6027<\/p>\n<p>\u51fd\u6570\u8bf4\u660e&#xff1a;<\/p>\n<li>pthread_mutex_lock()&#xff1a;\u963b\u585e\u52a0\u9501\u3002\u5982\u679c\u9501\u5df2\u7ecf\u88ab\u522b\u7684\u7ebf\u7a0b\u5360\u7528&#xff0c;\u5f53\u524d\u7ebf\u7a0b\u4f11\u7720\u963b\u585e&#xff0c;\u76f4\u5230\u9501\u88ab\u91ca\u653e\u3002<\/li>\n<li>pthread_mutex_unlock()&#xff1a;\u91ca\u653e\u4e92\u65a5\u9501\u3002<\/li>\n<li>pthread_mutex_destroy()&#xff1a;\u9500\u6bc1\u9501&#xff0c;\u91ca\u653e\u9501\u5360\u7528\u7684\u5185\u6838\u8d44\u6e90\u3002<\/li>\n<h4>\u975e\u963b\u585e\u5c1d\u8bd5\u52a0\u9501<\/h4>\n<p>int pthread_mutex_trylock(pthread_mutex_t *mutex);<\/p>\n<p>\u5982\u679c\u9501\u5df2\u7ecf\u88ab\u5360\u7528&#xff0c;\u51fd\u6570\u4e0d\u4f1a\u963b\u585e\u4f11\u7720&#xff0c;\u76f4\u63a5\u8fd4\u56de\u9519\u8bef&#xff0c;\u7ebf\u7a0b\u53ef\u4ee5\u53bb\u505a\u5176\u4ed6\u4e1a\u52a1\u3002\u53ef\u4ee5\u7528\u6765\u89c4\u907f\u6b7b\u9501\u3002<\/p>\n<h4>\u5176\u4ed6\u9501\u7b80\u5355\u4e86\u89e3<\/h4>\n<li>\u8bfb\u5199\u9501&#xff1a;\u8bfb\u5171\u4eab&#xff0c;\u5199\u72ec\u5360\u3002\u591a\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u540c\u65f6\u8bfb&#xff1b;\u5199\u64cd\u4f5c\u53ea\u80fd\u72ec\u5360\u3002\u9002\u5408\u8bfb\u591a\u5199\u5c11\u573a\u666f\u3002<\/li>\n<li>\u81ea\u65cb\u9501&#xff1a;\u62ff\u4e0d\u5230\u9501\u7684\u65f6\u5019\u4e0d\u4f1a\u4f11\u7720&#xff0c;CPU \u7a7a\u5faa\u73af\u8f6e\u8be2\u62a2\u5360\u9501\u3002CPU \u6d88\u8017\u9ad8&#xff0c;\u9002\u5408\u4e34\u754c\u533a\u4ee3\u7801\u6267\u884c\u6781\u77ed\u7684\u573a\u666f\u3002<\/li>\n<h3>\u56db\u3001\u4fe1\u53f7\u91cf sem_t&#xff08;\u7ebf\u7a0b\u540c\u6b65&#xff09;<\/h3>\n<p>\u4e92\u65a5&#xff1a;\u89e3\u51b3 \u201c\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u4e00\u4e2a\u4eba\u8bbf\u95ee\u8d44\u6e90\u201d&#xff1b;\u540c\u6b65&#xff1a;\u89e3\u51b3 \u201c\u7ebf\u7a0b\u6267\u884c\u5148\u540e\u987a\u5e8f\u201d\u3002<\/p>\n<p>\u4fe1\u53f7\u91cf\u672c\u8d28\u4ee3\u8868\u53ef\u7528\u8d44\u6e90\u7684\u8ba1\u6570\u3002<\/p>\n<ul>\n<li>P \u64cd\u4f5c&#xff08;sem_wait&#xff09;&#xff1a;\u7533\u8bf7\u8d44\u6e90&#xff0c;\u8d44\u6e90\u8ba1\u6570\u51cf\u4e00\u3002\u8d44\u6e90\u4e3a 0 \u7684\u65f6\u5019\u7ebf\u7a0b\u963b\u585e\u7b49\u5f85\u8d44\u6e90\u3002<\/li>\n<li>V \u64cd\u4f5c&#xff08;sem_post&#xff09;&#xff1a;\u91ca\u653e\u8d44\u6e90&#xff0c;\u8d44\u6e90\u8ba1\u6570\u52a0\u4e00&#xff0c;\u5524\u9192\u7b49\u5f85\u8be5\u4fe1\u53f7\u91cf\u7684\u7ebf\u7a0b\u3002<\/li>\n<\/ul>\n<h4>\u4fe1\u53f7\u91cf API<\/h4>\n<p>\/\/\u521d\u59cb\u5316\u4fe1\u53f7\u91cf<br \/>\nint sem_init(sem_t *sem, int pshared, unsigned int value);<\/p>\n<p>\u53c2\u6570&#xff1a;<\/p>\n<ul>\n<li>sem&#xff1a;\u4fe1\u53f7\u91cf\u5bf9\u8c61\u5730\u5740<\/li>\n<li>pshared&#xff1a;0 \u4ee3\u8868\u7ebf\u7a0b\u4e4b\u95f4\u5171\u4eab&#xff1b;\u975e 0 \u4ee3\u8868\u8fdb\u7a0b\u95f4\u5171\u4eab<\/li>\n<li>value&#xff1a;\u4fe1\u53f7\u91cf\u521d\u59cb\u8d44\u6e90\u6570\u91cf<\/li>\n<\/ul>\n<p>int sem_wait(sem_t *sem);    \/\/P\u64cd\u4f5c&#xff0c;\u7533\u8bf7\u8d44\u6e90&#xff0c;\u8ba1\u6570\u20111&#xff0c;\u8d44\u6e900\u5219\u963b\u585e<br \/>\nint sem_post(sem_t *sem);    \/\/V\u64cd\u4f5c&#xff0c;\u91ca\u653e\u8d44\u6e90&#xff0c;\u8ba1\u6570&#043;1&#xff0c;\u5524\u9192\u963b\u585e\u7ebf\u7a0b<br \/>\nint sem_destroy(sem_t *sem); \/\/\u9500\u6bc1\u4fe1\u53f7\u91cf<\/p>\n<h3>\u4e94\u3001\u6b7b\u9501\u4ea7\u751f\u7684\u6761\u4ef6\u4ee5\u53ca\u89e3\u51b3\u65b9\u6848<\/h3>\n<h4>\u4ec0\u4e48\u662f\u6b7b\u9501<\/h4>\n<p>\u591a\u7ebf\u7a0b\u73af\u5883&#xff0c;\u591a\u4e2a\u7ebf\u7a0b\u5404\u81ea\u6301\u6709\u5df2\u7ecf\u83b7\u53d6\u7684\u9501&#xff0c;\u540c\u65f6\u4e92\u76f8\u8bf7\u6c42\u5bf9\u65b9\u624b\u91cc\u6301\u6709\u7684\u9501&#xff0c;\u6240\u6709\u7ebf\u7a0b\u6c38\u4e45\u963b\u585e&#xff0c;\u7a0b\u5e8f\u5361\u6b7b\u3002<\/p>\n<p>\u5178\u578b\u573a\u666f&#xff1a;<\/p>\n<p>\u7ebf\u7a0b A \u62ff\u5230\u9501 1&#xff0c;\u7b49\u5f85\u9501 2&#xff1b;\u7ebf\u7a0b B \u62ff\u5230\u9501 2&#xff0c;\u7b49\u5f85\u9501 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\u8fdb\u7a0b\u7ebf\u7a0b\u77e5\u8bc6\u70b9&#xff0c;\u91cd\u70b9\u8bb2\u89e3\u7ebf\u7a0b\u5206\u79bb \/ \u975e\u5206\u79bb\u5c5e\u6027\u3001pthread_join 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