{"id":207279,"date":"2025-07-08T10:34:02","date_gmt":"2025-07-08T02:34:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207279\/"},"modified":"2025-07-08T10:34:02","modified_gmt":"2025-07-08T02:34:02","slug":"%e5%a6%82%e4%bd%95%e8%b0%83%e7%94%a8%e4%bf%ae%e6%94%b9go%e5%86%85%e5%ad%98%e7%9a%84c%e5%87%bd%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207279\/","title":{"rendered":"\u5982\u4f55\u8c03\u7528\u4fee\u6539go\u5185\u5b58\u7684C\u51fd\u6570\uff1f"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u8c03\u7528\u4fee\u6539go\u5185\u5b58\u7684C\u51fd\u6570\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-21 12:51:25<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\u300a\u5982\u4f55\u8c03\u7528\u4fee\u6539go\u5185\u5b58\u7684C\u51fd\u6570\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9…\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01<\/p>\n

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

\u5047\u8bbe\u6211\u6709\u4e00\u4e2a\u5e26\u7b7e\u540d\u7684 C \u51fd\u6570<\/p>\n

\/\/ myclib.h\n\nvoid modify(double* ptr, int N);\n<\/pre>\n
\u8fd9\u4f1a\u6539\u53d8\u53c2\u6570\u6307\u9488 ptr<\/code> \u6307\u5411\u7684\u5185\u5b58\u3002<\/p>\n
\u4ee5\u4e0b\u4ee3\u7801\u5bf9\u4e8e Go \u7684\u5783\u573e\u6536\u96c6\u5668\u6765\u8bf4\u662f\u5426\u5b89\u5168\uff1f\u662f\u5426\u9700\u8981 runtimer.Pinner<\/code>\uff1f<\/p>\n
package main\n\n\/\/ #cgo CFLAGS: -g -Wall\n\/\/ #include \"myclib.h\"\nimport \"C\"\nimport (\n    \"fmt\"\n    \"runtime\"\n)\n\nfunc modifyWrapper(v []float64) {\n    ptr := (*C.double)(&v[0])\n    N := (C.int)(len(v))\n\n    pinner := runtime.Pinner{}\n    pinner.Pin(ptr)\n    C.modify(ptr, N)\n    pinner.Unpin()\n}\n\nfunc main() {\n    v := []float64{9.0, 2.0, 1.0, 4.0, 5.0}\n    modifyWrapper(v)\n}\n<\/pre>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
package main\n\n\/*\n#cgo CFLAGS: -g -Wall\n#include <stdio.h>\nvoid modify(double* ptr, int N) {\n    if (!ptr || N <= 0) {\n        return;\n    }\n    printf(\"modify: %g %d\\n\", *ptr, N);\n    *ptr = 42;\n    printf(\"modify: %g %d\\n\", *ptr, N);\n}\n*\/\nimport \"C\"\n\nimport (\n    \"fmt\"\n    \"unsafe\"\n)\n\nfunc modify(v []float64) {\n    ptr := (*C.double)(unsafe.SliceData(v))\n    N := (C.int)(len(v))\n    C.modify(ptr, N)\n}\n\nfunc main() {\n    v := []float64{9.0, 2.0, 1.0, 4.0, 5.0}\n    fmt.Println(v)\n    modify(v)\n    fmt.Println(v)\n}<\/pre>\n
[9 2 1 4 5]\nmodify: 9 5\nmodify: 42 5\n[42 2 1 4 5]<\/pre>\n
\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u5982\u4f55\u8c03\u7528\u4fee\u6539go\u5185\u5b58\u7684C\u51fd\u6570\uff1f\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03Golang\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\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-207279","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207279","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=207279"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207279\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}