{"id":208282,"date":"2025-07-08T09:05:31","date_gmt":"2025-07-08T01:05:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208282\/"},"modified":"2025-07-08T09:05:31","modified_gmt":"2025-07-08T01:05:31","slug":"%e9%87%8d%e7%8e%b0%e8%87%b4%e5%91%bd%e9%94%99%e8%af%af%ef%bc%9a%e5%b9%b6%e5%8f%91%e6%98%a0%e5%b0%84%e8%af%bb%e5%8f%96%e5%92%8c%e6%98%a0%e5%b0%84%e5%86%99%e5%85%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208282\/","title":{"rendered":"\u91cd\u73b0\u201c\u81f4\u547d\u9519\u8bef\uff1a\u5e76\u53d1\u6620\u5c04\u8bfb\u53d6\u548c\u6620\u5c04\u5199\u5165\u201d"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u91cd\u73b0\u201c\u81f4\u547d\u9519\u8bef\uff1a\u5e76\u53d1\u6620\u5c04\u8bfb\u53d6\u548c\u6620\u5c04\u5199\u5165\u201d<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-05-01 11:00:35<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u79ef\u7d2f\u77e5\u8bc6\uff0c\u80dc\u8fc7\u79ef\u84c4\u91d1\u94f6\uff01\u6bd5\u7adf\u5728Golang\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u9047\u5230\u5404\u79cd\u5404\u6837\u7684\u95ee\u9898\uff0c\u5f80\u5f80\u90fd\u662f\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u6ca1\u6709\u638c\u63e1\u597d\u800c\u5bfc\u81f4\u7684\uff0c\u56e0\u6b64\u57fa\u7840\u77e5\u8bc6\u70b9\u7684\u79ef\u7d2f\u662f\u5f88\u91cd\u8981\u7684\u3002\u4e0b\u9762\u672c\u6587\u300a\u91cd\u73b0\u201c\u81f4\u547d\u9519\u8bef\uff1a\u5e76\u53d1\u6620\u5c04\u8bfb\u53d6\u548c\u6620\u5c04\u5199\u5165\u201d\u300b\uff0c\u5c31\u5e26\u5927\u5bb6\u8bb2\u89e3\u4e00\u4e0b\u77e5\u8bc6\u70b9\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u6b63\u5728\u8c03\u8bd5\u6211\u7684\u7a0b\u5e8f\uff0c\u4ee5\u53d1\u73b0\u9519\u8bef \u81f4\u547d\u9519\u8bef\uff1a\u5e76\u53d1\u5730\u56fe\u8bfb\u53d6\u548c\u5730\u56fe\u5199\u5165 <\/code>\u3002\u7a0b\u5e8f\u53ef\u4ee5\u7b80\u5316\u4e3a\uff1a<\/p>\n

package main\n\nimport (\n    \"sync\"\n    \"time\"\n)\n\nfunc read(channelmap *map[int]chan bool, key int, mutex *sync.mutex) {\n    mutex.lock()\n    (*channelmap)[key] = make(chan bool, 1)\n    mutex.unlock()\n\n    defer func() {\n        mutex.lock()\n        delete((*channelmap), key)\n        mutex.unlock()\n    }()\n\n    select {\n    case <-(*channelmap)[key]:\n        {\n        }\n    case <-time.after(time.second):\n        {\n        }\n    }\n}\n\nfunc write(channelmap *map[int]chan bool, key int, mutex *sync.mutex) {\n    mutex.lock()\n    if channel, exist := (*channelmap)[key]; exist {\n        channel <- true\n    }\n    mutex.unlock()\n}\n\nfunc main() {\n    mutex := &sync.mutex{}\n    channelmap := make(map[int]chan bool)\n\n    for i := 0; i < 100; i++ {\n        go func() {\n            for {\n                read(&channelmap, 0, mutex)\n                time.sleep(time.millisecond)\n            }\n        }()\n        go func() {\n            for {\n                write(&channelmap, 0, mutex)\n                time.sleep(time.millisecond)\n            }\n        }()\n    }\n\n    time.sleep(10 * time.minute)\n}<\/pre>\n
\u5bf9\u4e8e\u8fd9\u4e2a\u7a0b\u5e8f\uff0c\u53ea\u6709 channelmap<\/code> \u548c mutex<\/code> \u5728\u4e0d\u540c\u7684\u51fd\u6570\u4e2d\u5171\u4eab\uff0c\u5176\u4ed6\u6240\u6709\u5185\u5bb9\u90fd\u662f\u53c2\u6570\u5316\u7684\u3002<\/p>\n
\u6709\u591a\u4e2a read<\/code> \u548c write<\/code>\uff0c\u4ed6\u4eec\u6709\u6743\u8bbf\u95ee channelmap<\/code>\uff0c\u5373\u5b58\u50a8 channel<\/code> \u7684\u5730\u56fe\u3002 read<\/code> \u5728\u67d0\u4e2a\u7ed9\u5b9a\u65f6\u95f4\uff08\u793a\u4f8b\u4ee3\u7801\u4e2d\u4e3a 1 \u79d2\uff09\u7b49\u5f85\u6765\u81ea\u67d0\u4e2a\u901a\u9053\u7684\u503c\uff0c\u5e76\u4e14\u5f53\u8be5\u901a\u9053\u5b58\u5728\u4e8e channelmap<\/code> \u4e2d\u65f6\uff0cwrite<\/code> \u5411\u8be5\u901a\u9053\u53d1\u9001\u4e00\u4e2a\u503c\u3002<\/p>\n
\u5bf9 channelmap<\/code> \u7684\u6bcf\u6b21\u8bbf\u95ee\u90fd\u53d7\u5230\u5171\u4eab sync.mutex<\/code> \u7684\u4fdd\u62a4\uff0c\u552f\u4e00\u7684\u4f8b\u5916\u662f<\/p>\n
select {\n    case <-(*channelMap)[key]:\n        {\n        }\n    case <-time.After(time.Second):\n        {\n        }\n    }<\/pre>\n
\u6211\u8ba4\u4e3a\u8fd9\u662f\u552f\u4e00\u7684\u6f0f\u6d1e\uff0c\u4f46\u4f7f\u7528\u7b80\u5316\u7684\u7a0b\u5e8f\u6211\u4ecd\u7136\u65e0\u6cd5\u91cd\u73b0\u8be5\u9519\u8bef\u3002\u6709\u4eba\u53ef\u4ee5\u5411\u6211\u89e3\u91ca\u4e00\u4e0b\u8fd9\u4e2a\u7a0b\u5e8f\u4e2d\u53ef\u80fd\u5b58\u5728\u7684\u903b\u8f91\u7f3a\u9677\u5417\uff1f<\/p>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
\u5e76\u53d1\u4fee\u6539\u6570\u636e\u7ed3\u6784\u65f6\uff0c\u6240\u6709\u8bfb\u53d6\u548c\u5199\u5165\u90fd\u5fc5\u987b\u53d7\u5230\u4e92\u65a5\u9501\u7684\u4fdd\u62a4\u3002<\/p>\n
\u8fd9\u90e8\u5206\uff1acase <-(*channelMap)[key]:<\/code> \u65e0\u9700\u6301\u6709\u9501\u5373\u53ef\u8bbf\u95ee channelMap<\/code>\u3002<\/p>\n
\u5728\u4e24\u79cd\u60c5\u51b5\u4e0b\u53ef\u4ee5\u5e76\u53d1\u8bbf\u95ee\u6570\u636e\u7ed3\u6784\uff1a<\/p>\n
    \n
  • \u96f6\u4e2a\u4f5c\u8005\uff0c\u4e00\u4e2a\u6216\u591a\u4e2a\u8bfb\u8005\uff0c\u6216\u8005<\/li>\n
  • \u4e00\u4f4d\u4f5c\u8005\uff0c\u96f6\u4f4d\u8bfb\u8005\u3002<\/li>\n<\/ul>\n
    \u4ee5\u4e0a\u5c31\u662f\u300a\u91cd\u73b0\u201c\u81f4\u547d\u9519\u8bef\uff1a\u5e76\u53d1\u6620\u5c04\u8bfb\u53d6\u548c\u6620\u5c04\u5199\u5165\u201d\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-208282","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208282"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208282\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}