{"id":2342,"date":"2025-09-19T12:15:58","date_gmt":"2025-09-19T04:15:58","guid":{"rendered":"https:\/\/www.madbull.site\/?p=2342"},"modified":"2025-10-15T10:41:35","modified_gmt":"2025-10-15T02:41:35","slug":"lua%e4%b8%8ec%e8%af%ad%e8%a8%80%e4%ba%a4%e4%ba%92%e7%9a%84%e6%b3%a8%e5%86%8c%e8%a1%a8%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"https:\/\/www.madbull.site\/?p=2342","title":{"rendered":"Lua C API \u4e2d\u7684\u6ce8\u518c\u8868\u4ecb\u7ecd"},"content":{"rendered":"\n

\u5728 Lua \u7684 C API \u4e2d\uff0c\u6709\u4e00\u4e2a\u7279\u6b8a\u7684\u8868\uff0c\u53eb\u505a \u6ce8\u518c\u8868\uff08Registry\uff09<\/strong>\u3002\u5b83\u4e0d\u662f Lua \u811a\u672c\u4e2d\u80fd\u76f4\u63a5\u8bbf\u95ee\u7684\u666e\u901a\u8868\uff0c\u800c\u662f\u4e13\u4e3a C \u4ee3\u7801\u8bbe\u8ba1\u7684\u5168\u5c40\u5b58\u50a8\u533a<\/strong>\u3002<\/p>\n\n\n\n

\n\n\n\n

\u4e00\u3001\u6ce8\u518c\u8868\u662f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n
    \n
  • \u6ce8\u518c\u8868\u662f\u4e00\u4e2a\u666e\u901a\u7684 Lua \u8868<\/strong>\uff0c\u4f46\u53ea\u6709 C \u4ee3\u7801\u80fd\u8bbf\u95ee\u3002<\/li>\n\n\n\n
  • \u5b83\u7684\u201c\u5730\u5740\u201d\u662f\u56fa\u5b9a\u7684\uff1a\u4f7f\u7528\u4f2a\u7d22\u5f15 LUA_REGISTRYINDEX<\/code>\uff08\u503c\u4e3a -10000\uff09\u3002<\/li>\n\n\n\n
  • Lua \u811a\u672c\u4e2d\u6ca1\u6709\u53d8\u91cf\u6307\u5411\u5b83\uff0c\u56e0\u6b64\u811a\u672c\u65e0\u6cd5\u76f4\u63a5\u8bfb\u5199\u5b83\u3002<\/li>\n\n\n\n
  • \u5b83\u7684\u751f\u547d\u5468\u671f\u548c Lua \u72b6\u6001\u673a\uff08lua_State* L<\/code>\uff09\u4e00\u81f4 \u2014\u2014 \u53ea\u8981 L \u5b58\u5728\uff0c\u6ce8\u518c\u8868\u5c31\u5b58\u5728\u3002<\/li>\n\n\n\n
  • \u6240\u4ee5\uff0c\u6ce8\u518c\u8868\u4e0d\u662f _G<\/code>\uff08\u5168\u5c40\u8868\uff09<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    \u4e8c\u3001\u4e3a\u4ec0\u4e48\u9700\u8981\u6ce8\u518c\u8868\uff1f<\/h2>\n\n\n\n

    \u5f53\u4f60\u5728 C \u4e2d\u8c03\u7528 Lua\uff0c\u6709\u65f6\u9700\u8981\uff1a<\/p>\n\n\n\n

      \n
    • \u4fdd\u5b58\u4e00\u4e2a Lua \u51fd\u6570\uff0c\u4ee5\u540e\u56de\u8c03\u5b83\uff08\u6bd4\u5982\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\uff09<\/li>\n\n\n\n
    • \u4fdd\u5b58\u4e00\u4e2a Lua \u8868\u6216 userdata\uff0c\u907f\u514d\u88ab\u5783\u573e\u56de\u6536<\/li>\n\n\n\n
    • \u5728\u591a\u4e2a C \u51fd\u6570\u4e4b\u95f4\u4f20\u9012 Lua \u5bf9\u8c61<\/li>\n<\/ul>\n\n\n\n

      \u76f4\u63a5\u4fdd\u5b58 lua_State*<\/code> \u548c\u6808\u4f4d\u7f6e\u662f\u4e0d\u5b89\u5168\u7684 \u2014\u2014 \u6808\u4f1a\u53d8\uff0c\u5bf9\u8c61\u53ef\u80fd\u88ab GC\u3002
      \u6ce8\u518c\u8868\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5b89\u5168\u3001\u7a33\u5b9a\u3001\u957f\u671f\u5b58\u50a8 Lua \u503c\u7684\u5730\u65b9<\/strong>\u3002<\/p>\n\n\n\n

      \n\n\n\n

      \u4e09\u3001\u600e\u4e48\u4f7f\u7528\u6ce8\u518c\u8868\uff1f<\/h2>\n\n\n\n

      \u6700\u5e38\u7528\u3001\u6700\u5b89\u5168\u7684\u65b9\u5f0f\u662f\u914d\u5408 luaL_ref<\/code> \u548c luaL_unref<\/code>\uff1a<\/p>\n\n\n\n

      1. \u4fdd\u5b58\u503c \u2192 \u83b7\u53d6\u5f15\u7528\u7f16\u53f7<\/h3>\n\n\n\n
      lua_pushvalue(L, idx);        \/\/ \u628a\u4f60\u60f3\u4fdd\u5b58\u7684\u503c\u63a8\u5230\u6808\u9876\nint<\/strong> ref = luaL_ref(L, LUA_REGISTRYINDEX);  \/\/ \u5b58\u5165\u6ce8\u518c\u8868\uff0c\u8fd4\u56de\u6574\u6570\u5f15\u7528<\/code><\/pre>\n\n\n\n
      2. \u53d6\u56de\u503c<\/h3>\n\n\n\n
      lua_rawgeti(L, LUA_REGISTRYINDEX, ref);  \/\/ \u628a\u503c\u91cd\u65b0\u538b\u5165\u6808\u9876<\/code><\/pre>\n\n\n\n
      3. \u91ca\u653e\u503c\uff08\u91cd\u8981\uff01\uff09<\/h3>\n\n\n\n
      luaL_unref(L, LUA_REGISTRYINDEX, ref);   \/\/ \u91ca\u653e\u5f15\u7528\uff0c\u907f\u514d\u5185\u5b58\u6cc4\u6f0f<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      \u56db\u3001\u6ce8\u610f\u4e8b\u9879<\/h2>\n\n\n\n
        \n
      • \u2705 \u63a8\u8350\u53ea\u7528 luaL_ref<\/code> \u8fd4\u56de\u7684\u6574\u6570\u4f5c\u4e3a\u952e<\/strong> \u2014\u2014 \u8fd9\u662f\u5b89\u5168\u533a\uff0c\u4e0d\u4f1a\u548c Lua \u5185\u90e8\u51b2\u7a81\u3002<\/li>\n\n\n\n
      • \u274c \u907f\u514d\u7528\u5b57\u7b26\u4e32\u952e<\/strong>\uff08\u5982 \"mydata\"<\/code>\uff09\u2014\u2014 Lua \u5185\u90e8\u53ef\u80fd\u5df2\u5360\u7528\u67d0\u4e9b\u952e\uff08\u5982 \"IO\"<\/code>\uff09\uff0c\u6709\u51b2\u7a81\u98ce\u9669\u3002<\/li>\n\n\n\n
      • \ud83e\uddf9 \u7528\u5b8c\u4e00\u5b9a\u8981 luaL_unref<\/code><\/strong> \u2014\u2014 \u5426\u5219\u5bf9\u8c61\u4f1a\u4e00\u76f4\u7559\u5728\u6ce8\u518c\u8868\u4e2d\uff0c\u9020\u6210\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n
        \u4e94\u3001\u5178\u578b\u5e94\u7528\u573a\u666f<\/h2>\n\n\n\n
          \n
        • \u4fdd\u5b58 Lua \u56de\u8c03\u51fd\u6570\u4f9b C \u89e6\u53d1<\/li>\n\n\n\n
        • \u5728 C \u7ed3\u6784\u4f53\u4e2d\u5b58\u50a8 Lua \u5bf9\u8c61\u7684\u201c\u53e5\u67c4\u201d<\/li>\n\n\n\n
        • \u5b9e\u73b0 C \u4e0e Lua \u4e4b\u95f4\u7684\u5bf9\u8c61\u751f\u547d\u5468\u671f\u7ba1\u7406<\/li>\n\n\n\n
        • \u8de8\u591a\u4e2a C \u51fd\u6570\u5171\u4eab Lua \u6570\u636e<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n
          \u516d\u3001\u603b\u7ed3<\/h2>\n\n\n\n
          \u6ce8\u518c\u8868\u662f Lua C API \u4e2d\u4e00\u4e2a\u7b80\u5355\u4f46\u975e\u5e38\u5b9e\u7528\u7684\u673a\u5236\uff1a<\/p>\n\n\n\n
          \n
          \u5b83\u8ba9 C \u4ee3\u7801\u80fd\u5b89\u5168\u5730\u201c\u8bb0\u4f4f\u201dLua \u4e2d\u7684\u5bf9\u8c61\uff0c\u4e0d\u6015\u6808\u53d8\u5316\uff0c\u4e0d\u6015 GC \u56de\u6536\u3002<\/strong><\/p>\n<\/blockquote>\n\n\n\n
          \u4f7f\u7528\u65b9\u6cd5\u4e5f\u5f88\u7b80\u5355\uff1a<\/p>\n\n\n\n
          luaL_ref \u2192 \u4fdd\u5b58\uff0c\u62ff\u7f16\u53f7\nlua_rawgeti \u2192 \u53d6\u56de\nluaL_unref \u2192 \u91ca\u653e<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
          \u5728 Lua \u7684 C API \u4e2d\uff0c\u6709\u4e00\u4e2a\u7279\u6b8a\u7684\u8868\uff0c\u53eb\u505a \u6ce8\u518c\u8868\uff08Registry\uff09\u3002\u5b83\u4e0d\u662f Lua \u811a\u672c\u4e2d\u80fd\u76f4\u63a5 […]<\/p>\n","protected":false},"author":1,"featured_media":2330,"comment_status":"open","ping_status":"open","sticky":false,"template":"wp-custom-template-my","format":"standard","meta":{"footnotes":""},"categories":[156,695,154],"tags":[175,690,694],"class_list":["post-2342","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-c-c","category-lua","category-154","tag-c","tag-lua","tag-694"],"_links":{"self":[{"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/posts\/2342","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2342"}],"version-history":[{"count":3,"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/posts\/2342\/revisions"}],"predecessor-version":[{"id":2384,"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/posts\/2342\/revisions\/2384"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/media\/2330"}],"wp:attachment":[{"href":"https:\/\/www.madbull.site\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2342"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2342"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2342"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}