{"id":208240,"date":"2025-07-08T11:40:53","date_gmt":"2025-07-08T03:40:53","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208240\/"},"modified":"2025-07-08T11:40:53","modified_gmt":"2025-07-08T03:40:53","slug":"%e5%b0%86-cgo-%e4%b8%ad%e7%9a%84%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%95%b0%e7%bb%84%e8%bd%ac%e6%8d%a2%e4%b8%ba-go","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208240\/","title":{"rendered":"\u5c06 CGO \u4e2d\u7684\u5b57\u7b26\u4e32\u6570\u7ec4\u8f6c\u6362\u4e3a GO"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u5c06 CGO \u4e2d\u7684\u5b57\u7b26\u4e32\u6570\u7ec4\u8f6c\u6362\u4e3a GO<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-30 16:54:37<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5c06 CGO \u4e2d\u7684\u5b57\u7b26\u4e32\u6570\u7ec4\u8f6c\u6362\u4e3a GO\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u53ef\u4ee5\u8f6c\u6362\u4ece go \u4e2d\u7684 c (cgo) \u51fd\u6570\u8fd4\u56de\u7684\u5b57\u7b26\u4e32\u6570\u7ec4 (char**) \u5417\uff1f \u4e0b\u9762\u7684\u4ee3\u7801\u53ef\u4ee5\u7f16\u8bd1\u5e76\u8fd0\u884c\uff0c\u4f46\u6211\u65e0\u6cd5\u904d\u5386\u5b57\u7b26\u4e32\u5217\u8868\u3002<\/p>\n<p> \u6211\u4ec0\u81f3\u4e0d\u786e\u5b9a\u5b83\u662f\u5426\u8fdd\u53cd\u4e86\u201c\u4f20\u9012\u6307\u9488\u201d\u7684\u89c4\u5219\uff1ahttps:\/\/golang.org\/cmd\/cgo\/ \u4efb\u4f55\u60f3\u6cd5\u90fd\u4f1a\u6709\u5e2e\u52a9\uff0c\u81ea\u4ece\u6211\u7528 c \u7f16\u5199\u4ee3\u7801\u5df2\u7ecf\u5f88\u591a\u5e74\u4e86\uff01\u63d0\u524d\u81f4\u8c22\uff01<\/p>\n<pre>package main\n\/*\n#include \"stdlib.h\"\n\nchar** getlist ()\n{\n    char **array = NULL;\n    array = (char**)realloc(array, 2*sizeof(*array));\n    array[0]=\"HELLO\";\n    array[1]=\"WORLD\";\n    return array;\n}\n\n*\/\nimport \"C\"\n\nimport (\n    \"log\"\n    \"unsafe\"\n)\n\nfunc main() {\n    list := C.getlist();\n    log.Printf(\"\\n========\\n C.getList()=%s\", list)\n    ulist := unsafe.Pointer(list)\n    log.Printf(\"\\n========\\nulist=%s\", ulist)\n}<\/pre>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u4e3a\u4e86\u5728 go \u4e2d\u8fed\u4ee3\u5b57\u7b26\u4e32\uff0c\u60a8\u9700\u8981\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a go \u5207\u7247\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u8fd9\u91cc\u8df3\u8fc7\u5206\u914d\uff0c\u76f4\u63a5\u8f6c\u6362\u5b83\uff08\u60a8\u7684\u793a\u4f8b\u9759\u6001\u5730\u5c06\u957f\u5ea6\u8bbe\u7f6e\u4e3a 2\uff0c\u4f46\u5b9e\u9645\u4e0a\u60a8\u53ef\u80fd\u6709\u8fd9\u4e2a\u5927\u5c0f\u7684\u53e6\u4e00\u4e2a\u6765\u6e90\uff09<\/p>\n<pre>cslice := (*[1 &lt;&lt; 28]*c.char)(unsafe.pointer(list))[:2:2]<\/pre>\n<p>\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u8fed\u4ee3\u5b83\uff0c\u5e76\u4f7f\u7528 <code>c.gostring<\/code> \u51fd\u6570\u6765\u8f6c\u6362 c \u5b57\u7b26\u4e32\u3002\u8fd9\u5b58\u50a8\u8d77\u6765\u66f4\u5b89\u5168\uff0c\u56e0\u4e3a\u5b83\u5c06\u6570\u636e\u590d\u5236\u5230 go \u5185\u5b58\uff0c\u4f46\u5982\u679c\u8fd9\u4e2a\u5207\u7247\u7279\u522b\u5927\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e0e\u4e0a\u9762\u76f8\u540c\u7684\u4e0d\u5b89\u5168\u8f6c\u6362\u6765\u4fdd\u5b58\u5206\u914d\uff0c\u5c3d\u7ba1\u60a8\u9996\u5148\u9700\u8981\u627e\u5230\u6bcf\u4e2a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u3002<\/p>\n<pre>var slice []string\nfor _, s := range (*[1 &lt;&lt; 28]*c.char)(unsafe.pointer(list))[:2:2] {\n    slice = append(slice, c.gostring(s))\n}<\/pre>\n<p>\u7ecf\u8fc7\u51e0\u4e2a\u5c0f\u65f6\u7684\u6d4f\u89c8\uff0c\u6211\u627e\u5230\u4e86\u8fd9\u4e2a\u7b80\u6d01\u7684\u89e3\u51b3\u65b9\u6848\uff08\uff09\uff1a<\/p>\n<pre>list := c.getlist()\nlength := 2\nslice := make([]string, length)\nfor _, v := range unsafe.slice(list, length) {\n    slice = append(slice, c.gostring(v))\n}\n<\/pre>\n<p>\u5bf9\u4e8e\u957f\u5ea6\u731c\u6d4b\u95ee\u9898\uff0c\u60a8\u53ef\u4ee5\u8ba9 c \u51fd\u6570\u83b7\u53d6\u6307\u5411\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u6307\u9488\u5e76\u8fd4\u56de\u5927\u5c0f\u3002\u7136\u540e\u5b83\u770b\u8d77\u6765\u50cf\u8fd9\u6837\uff1a<\/p>\n<pre>var list **C.char \nlength := C.getList(&amp;list)\nslice := make([]string, length)\nfor _, v := range unsafe.Slice(list, length) {\n    slice = append(slice, C.GoString(v))\n}\n<\/pre>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u5c06 CGO \u4e2d\u7684\u5b57\u7b26\u4e32\u6570\u7ec4\u8f6c\u6362\u4e3a GO\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/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-208240","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208240","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=208240"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208240\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208240"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208240"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}