{"id":46799,"date":"2023-12-11T15:09:51","date_gmt":"2023-12-11T07:09:51","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=46799"},"modified":"2023-12-11T15:09:51","modified_gmt":"2023-12-11T07:09:51","slug":"%e8%af%b7%e4%bd%a0%e8%af%b4%e4%b8%80%e8%af%b4%e7%ba%bf%e7%a8%8b%e9%97%b4%e7%9a%84%e5%90%8c%e6%ad%a5%e6%96%b9%e5%bc%8f%ef%bc%8c%e6%9c%80%e5%a5%bd%e8%af%b4%e5%87%ba%e5%85%b7%e4%bd%93%e7%9a%84%e7%b3%bb-3","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/%e8%af%b7%e4%bd%a0%e8%af%b4%e4%b8%80%e8%af%b4%e7%ba%bf%e7%a8%8b%e9%97%b4%e7%9a%84%e5%90%8c%e6%ad%a5%e6%96%b9%e5%bc%8f%ef%bc%8c%e6%9c%80%e5%a5%bd%e8%af%b4%e5%87%ba%e5%85%b7%e4%bd%93%e7%9a%84%e7%b3%bb-3\/","title":{"rendered":"\u8bf7\u4f60\u8bf4\u4e00\u8bf4\u7ebf\u7a0b\u95f4\u7684\u540c\u6b65\u65b9\u5f0f\uff0c\u6700\u597d\u8bf4\u51fa\u5177\u4f53\u7684\u7cfb\u7edf\u8c03\u7528"},"content":{"rendered":"

“`\u53c2\u8003\u56de\u7b54\uff1a<\/p>\n

\u4fe1\u53f7\u91cf<\/p>\n

\u4fe1\u53f7\u91cf\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u53d8\u91cf\uff0c\u53ef\u7528\u4e8e\u7ebf\u7a0b\u540c\u6b65\u3002\u5b83\u53ea\u53d6\u81ea\u7136\u6570\u503c\uff0c\u5e76\u4e14\u53ea\u652f\u6301\u4e24\u79cd\u64cd\u4f5c\uff1a<\/p>\n

P(SV):\u5982\u679c\u4fe1\u53f7\u91cfSV\u5927\u4e8e0\uff0c\u5c06\u5b83\u51cf\u4e00\uff1b\u5982\u679cSV\u503c\u4e3a0\uff0c\u5219\u6302\u8d77\u8be5\u7ebf\u7a0b\u3002<\/p>\n

V(SV)\uff1a\u5982\u679c\u6709\u5176\u4ed6\u8fdb\u7a0b\u56e0\u4e3a\u7b49\u5f85SV\u800c\u6302\u8d77\uff0c\u5219\u5524\u9192\uff0c\u7136\u540e\u5c06SV+1\uff1b\u5426\u5219\u76f4\u63a5\u5c06SV+1\u3002<\/p>\n

\u5176\u7cfb\u7edf\u8c03\u7528\u4e3a\uff1a<\/p>\n

sem_wait\uff08sem_t *sem\uff09\uff1a\u4ee5\u539f\u5b50\u64cd\u4f5c\u7684\u65b9\u5f0f\u5c06\u4fe1\u53f7\u91cf\u51cf1\uff0c\u5982\u679c\u4fe1\u53f7\u91cf\u503c\u4e3a0\uff0c\u5219sem_wait\u5c06\u88ab\u963b\u585e\uff0c\u76f4\u5230\u8fd9\u4e2a\u4fe1\u53f7\u91cf\u5177\u6709\u975e0\u503c\u3002<\/p>\n

sem_post\uff08sem_t *sem)\uff1a\u4ee5\u539f\u5b50\u64cd\u4f5c\u5c06\u4fe1\u53f7\u91cf\u503c+1\u3002\u5f53\u4fe1\u53f7\u91cf\u5927\u4e8e0\u65f6\uff0c\u5176\u4ed6\u6b63\u5728\u8c03\u7528sem_wait\u7b49\u5f85\u4fe1\u53f7\u91cf\u7684\u7ebf\u7a0b\u5c06\u88ab\u5524\u9192\u3002<\/p>\n

\u00a0<\/p>\n

\u4e92\u65a5\u91cf<\/p>\n

\u4e92\u65a5\u91cf\u53c8\u79f0\u4e92\u65a5\u9501\uff0c\u4e3b\u8981\u7528\u4e8e\u7ebf\u7a0b\u4e92\u65a5\uff0c\u4e0d\u80fd\u4fdd\u8bc1\u6309\u5e8f\u8bbf\u95ee\uff0c\u53ef\u4ee5\u548c\u6761\u4ef6\u9501\u4e00\u8d77\u5b9e\u73b0\u540c\u6b65\u3002\u5f53\u8fdb\u5165\u4e34\u754c\u533a \u65f6\uff0c\u9700\u8981\u83b7\u5f97\u4e92\u65a5\u9501\u5e76\u4e14\u52a0\u9501\uff1b\u5f53\u79bb\u5f00\u4e34\u754c\u533a\u65f6\uff0c\u9700\u8981\u5bf9\u4e92\u65a5\u9501\u89e3\u9501\uff0c\u4ee5\u5524\u9192\u5176\u4ed6\u7b49\u5f85\u8be5\u4e92\u65a5\u9501\u7684\u7ebf\u7a0b\u3002\u5176\u4e3b\u8981\u7684\u7cfb\u7edf\u8c03\u7528\u5982\u4e0b\uff1a<\/p>\n

pthread_mutex_init:\u521d\u59cb\u5316\u4e92\u65a5\u9501<\/p>\n

pthread_mutex_destroy\uff1a\u9500\u6bc1\u4e92\u65a5\u9501<\/p>\n

pthread_mutex_lock\uff1a\u4ee5\u539f\u5b50\u64cd\u4f5c\u7684\u65b9\u5f0f\u7ed9\u4e00\u4e2a\u4e92\u65a5\u9501\u52a0\u9501\uff0c\u5982\u679c\u76ee\u6807\u4e92\u65a5\u9501\u5df2\u7ecf\u88ab\u4e0a\u9501\uff0cpthread_mutex_lock\u8c03\u7528\u5c06\u963b\u585e\uff0c\u76f4\u5230\u8be5\u4e92\u65a5\u9501\u7684\u5360\u6709\u8005\u5c06\u5176\u89e3\u9501\u3002<\/p>\n

pthread_mutex_unlock:\u4ee5\u4e00\u4e2a\u539f\u5b50\u64cd\u4f5c\u7684\u65b9\u5f0f\u7ed9\u4e00\u4e2a\u4e92\u65a5\u9501\u89e3\u9501\u3002<\/p>\n

\u00a0<\/p>\n

\u6761\u4ef6\u53d8\u91cf<\/p>\n

\u6761\u4ef6\u53d8\u91cf\uff0c\u53c8\u79f0\u6761\u4ef6\u9501\uff0c\u7528\u4e8e\u5728\u7ebf\u7a0b\u4e4b\u95f4\u540c\u6b65\u5171\u4eab\u6570\u636e\u7684\u503c\u3002\u6761\u4ef6\u53d8\u91cf\u63d0\u4f9b\u4e00\u79cd\u7ebf\u7a0b\u95f4\u901a\u4fe1\u673a\u5236\uff1a\u5f53\u67d0\u4e2a\u5171\u4eab\u6570\u636e\u8fbe\u5230\u67d0\u4e2a\u503c\u65f6\uff0c\u5524\u9192\u7b49\u5f85\u8fd9\u4e2a\u5171\u4eab\u6570\u636e\u7684\u4e00\u4e2a\/\u591a\u4e2a\u7ebf\u7a0b\u3002\u5373\uff0c\u5f53\u67d0\u4e2a\u5171\u4eab\u53d8\u91cf\u7b49\u4e8e\u67d0\u4e2a\u503c\u65f6\uff0c\u8c03\u7528 signal\/broadcast\u3002\u6b64\u65f6\u64cd\u4f5c\u5171\u4eab\u53d8\u91cf\u65f6\u9700\u8981\u52a0\u9501\u3002\u5176\u4e3b\u8981\u7684\u7cfb\u7edf\u8c03\u7528\u5982\u4e0b\uff1a<\/p>\n

pthread_cond_init:\u521d\u59cb\u5316\u6761\u4ef6\u53d8\u91cf<\/p>\n

pthread_cond_destroy\uff1a\u9500\u6bc1\u6761\u4ef6\u53d8\u91cf<\/p>\n

pthread_cond_signal\uff1a\u5524\u9192\u4e00\u4e2a\u7b49\u5f85\u76ee\u6807\u6761\u4ef6\u53d8\u91cf\u7684\u7ebf\u7a0b\u3002\u54ea\u4e2a\u7ebf\u7a0b\u88ab\u5524\u9192\u53d6\u51b3\u4e8e\u8c03\u5ea6\u7b56\u7565\u548c\u4f18\u5148\u7ea7\u3002<\/p>\n

pthread_cond_wait\uff1a\u7b49\u5f85\u76ee\u6807\u6761\u4ef6\u53d8\u91cf\u3002\u9700\u8981\u4e00\u4e2a\u52a0\u9501\u7684\u4e92\u65a5\u9501\u786e\u4fdd\u64cd\u4f5c\u7684\u539f\u5b50\u6027\u3002\u8be5\u51fd\u6570\u4e2d\u5728\u8fdb\u5165wait\u72b6\u6001\u524d\u9996\u5148\u8fdb\u884c\u89e3\u9501\uff0c\u7136\u540e\u63a5\u6536\u5230\u4fe1\u53f7\u540e\u4f1a\u518d\u52a0\u9501\uff0c\u4fdd\u8bc1\u8be5\u7ebf\u7a0b\u5bf9\u5171\u4eab\u8d44\u6e90\u6b63\u786e\u8bbf\u95ee\u3002<\/p>\n

“`<\/p>\n","protected":false},"excerpt":{"rendered":"

“`\u53c2\u8003\u56de\u7b54\uff1a \u4fe1\u53f7\u91cf \u4fe1\u53f7\u91cf\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u53d8\u91cf\uff0c\u53ef\u7528\u4e8e\u7ebf\u7a0b\u540c\u6b65\u3002\u5b83\u53ea\u53d6\u81ea\u7136\u6570\u503c\uff0c\u5e76\u4e14\u53ea\u652f\u6301\u4e24\u79cd\u64cd\u4f5c […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-46799","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/46799","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=46799"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/46799\/revisions"}],"predecessor-version":[{"id":46800,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/46799\/revisions\/46800"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=46799"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=46799"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=46799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}