{"id":1961,"date":"2021-08-03T15:20:12","date_gmt":"2021-08-03T07:20:12","guid":{"rendered":"https:\/\/egonlin.com\/?p=1961"},"modified":"2022-02-07T16:25:15","modified_gmt":"2022-02-07T08:25:15","slug":"go%e8%af%ad%e8%a8%80%e5%86%85%e5%ad%98%e5%af%b9%e9%bd%90","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=1961","title":{"rendered":"Go\u8bed\u8a00\u5185\u5b58\u5bf9\u9f50"},"content":{"rendered":"

Go\u8bed\u8a00\u5185\u5b58\u5bf9\u9f50<\/h1>\n

\u4e00 \u5185\u5b58\u8bbf\u95ee\u7c92\u5ea6<\/h2>\n

\u5185\u5b58\u7a7a\u95f4\u662f\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u8fde\u7eed\u7f16\u5740\u7684\u3002\u5982\u679c\u628a\u5185\u5b58\u5355\u5143\u6bd4\u55bb\u4e3a\u5c0f\u67dc\u5b50\uff0c\u90a3\u4e48\u5185\u5355\u5143\u7684\u5730\u5740\u5c31\u76f8\u5f53\u4e8e\u67dc\u5b50\u7684\u7f16\u53f7\uff0c\u5982\u4e0b\u6240\u793a<\/p>\n

\"\"<\/div><\/p>\n

\u91cd\u70b9\u6765\u4e86\uff1a<\/p>\n

1\u3001\u5927\u591a\u6570\u5c0f\u4f19\u4f34\u90fd\u4f1a\u9519\u8bef\u5730\u8ba4\u4e3a\uff1a\u5185\u5b58\u7684\u5c0f\u67dc\u5b50\u662f\u4e00\u4e2a\u841d\u535c\u4e00\u4e2a\u5751\uff0c\u6bcf\u4e2a\u5c0f\u67dc\u5b50\u90fd\u5b58\u653e\u4e00\u4e2a\u5b57\u8282\uff0c\u4f46\u5b9e\u9645\u4e0a\uff0c\u5185\u5b58\u4e2d\u5b58\u653e\u7684\u6570\u636e\u662f\u4e00\u5757\u4e00\u5757\u5b58\u653e\u7684\uff0c\u4e00\u5757\u5185\u5b58\u5305\u542b\u4e86n\u4e2a\u8fde\u7eed\u7684\u5c0f\u67dc\u5b50\uff0c\u8fd9\u4e00\u5757\u5185\u5b58\u5305\u542b\u7684n\u4e2a\u5c0f\u67dc\u5b50\u91cc\u53ef\u80fd\u6709\u7684\u5e76\u672a\u5b58\u653e\u6570\u636e\u3002\n\n\u200b2\u3001\u8fd9\u662f\u56e0\u4e3aCPU\u5e76\u4e0d\u4f1a\u4ee5\u4e00\u4e2a\u4e00\u4e2a\u5b57\u8282\u53bb\u8bfb\u53d6\u548c\u5199\u5165\u5185\u5b58\uff0c\u76f8\u53cd\uff0cCPU\u8bfb\u53d6\u5185\u5b58\u6570\u636e\u5c31\u662f\u4e00\u5757\u4e00\u5757\u8bfb\u53d6\u7684\uff0c\u5757\u7684\u5927\u5c0f\u53ef\u4ee5\u662f\uff1a2\u30014\u30016\u30018\u300116\u4e2a\u5b57\u8282\u7b49\u5927\u5c0f\u3002\n\n\u200b3\u3001\u5757\u5927\u5c0f\u79f0\u4e3a\u201c\u5185\u5b58\u8bbf\u95ee\u7c92\u5ea6\u201d<\/code><\/pre>\n
\u4f60\u4ee5\u4e3a\u7684cpu\u8bbf\u95ee\u5185\u5b58\u6570\u636e\u7684\u65b9\u5f0f\uff1a\u4e00\u4e2a\u4e00\u4e2a\u5b57\u8282\u5730\u8bbf\u95ee<\/p>\n
\"\"<\/div><\/p>\n
\u771f\u6b63\u7684\u8bbf\u95ee\u65b9\u5f0f\uff1a\u4e00\u5757\u4e00\u5757(\u4e00\u7ec4\u4e00\u7ec4)\u5b57\u8282\u5730\u8bbf\u95ee\uff0c\u5982\u4e0b\u6240\u793a\u5185\u5b58\u8bbf\u95ee\u7c92\u5ea6\u4e3a4\u5b57\u8282<\/p>\n
\"\"<\/div><\/p>\n
\u4e8c \u5185\u5b58\u5bf9\u9f50\u4ecb\u7ecd<\/h2>\n
\u200b   \u5185\u5b58\u5bf9\u9f50\u6307\u7684\u662f\u8ba1\u7b97\u673a\u4f1a\u5c06\u6211\u4eec\u8981\u5b58\u5165\u5185\u5b58\u4e2d\u7684\u3001\u8fde\u7eed\u7684\u3001\u591a\u4e2a\u6570\u636e\u52a0\u4ee5\u6574\u7406\uff0c\u6574\u9f50\u5730\u653e\u5165\u5185\u5b58\u4e2d\uff0c\u4ee5\u6b64\u6765\u8fce\u5408cpu\u5bf9\u5185\u5b58\u7684\u8bbf\u95ee\u7c92\u5ea6\uff0c\u5373\u4fdd\u8bc1cpu\u6309\u7167\u5185\u5b58\u7684\u8bbf\u95ee\u7c92\u5ea6\u6bcf\u6b21\u8bfb\u53d6\u5230\u4e00\u7ec4\u6570\u636e\u5168\u90fd\u662f\u6709\u7528\u7684\uff0c\u4e0d\u5fc5\u8bfb\u65e0\u7528\u7684\u6570\u636e\u518d\u820d\u5f03\u3002<\/p>\n
\u200b   \u4e3a\u4f55\u8981\u5185\u5b58\u5bf9\u9f50\u5462\uff1f\u6216\u8005\u8bf4\u5185\u5b58\u4e0d\u5bf9\u9f50\u5e26\u6765\u7684\u95ee\u9898\u662f\u4ec0\u4e48\u5462\uff1f<\/p>\n
    \n
  • 1\u3001\u5185\u5b58\u5bf9\u9f50\u7684\u60c5\u51b5\u4e0b\uff0ccpu\u4e00\u6b21\u8bfb\u53d6\u5c31\u53ef\u4ee5\u62ff\u5230\u6240\u6709\u6570\u636e\uff0c\u800c\u5728\u5185\u5b58\u672a\u5bf9\u9f50\u60c5\u51b5\u4e0b\uff0ccpu\u9700\u8981\u8bbf\u95ee\u4e24\u6b21\u5185\u5b58\uff0c\u5e76\u4e14cpu\u9700\u8981\u82b1\u8d39\u989d\u5916\u7684\u65f6\u949f\u5468\u671f\u6765\u5904\u7406\u5bf9\u9f50\u53ca\u8fd0\u7b97<\/li>\n<\/ul>\n
    \"\"<\/div><\/p>\n
    \u5728\u4e0a\u56fe\u4e2d\uff0c\u5047\u8bbe\u4ece Index 1 \u5f00\u59cb\u8bfb\u53d6\uff0c\u5c06\u4f1a\u51fa\u73b0\u5f88\u5d29\u6e83\u7684\u95ee\u9898\u3002\u56e0\u4e3a\u5b83\u7684\u5185\u5b58\u8bbf\u95ee\u8fb9\u754c\u662f\u4e0d\u5bf9\u9f50\u7684\u3002\u56e0\u6b64 CPU \u4f1a\u505a\u4e00\u4e9b\u989d\u5916\u7684\u5904\u7406\u5de5\u4f5c\u3002\u5982\u4e0b\uff1a<\/p>\n
      \n
    • (1)\u3001 CPU\u8bfb\u53d6\u672a\u5bf9\u9f50\u5730\u5740\u7684\u7b2c\u4e00\u4e2a\u5185\u5b58\u5757\uff0c\u8bfb\u53d6 0-3 \u5b57\u8282\u3002\u5e76\u79fb\u9664\u4e0d\u9700\u8981\u7684\u5b57\u8282 0<\/li>\n
    • (2)\u3001CPU\u8bfb\u53d6\u672a\u5bf9\u9f50\u5730\u5740\u7684\u7b2c\u4e8c\u4e2a\u5185\u5b58\u5757\uff0c\u8bfb\u53d6 4-7 \u5b57\u8282\u3002\u5e76\u79fb\u9664\u4e0d\u9700\u8981\u7684\u5b57\u8282 5\u30016\u30017 \u5b57\u8282<\/li>\n
    • (3)\u3001\u5408\u5e76 1-4 \u5b57\u8282\u7684\u6570\u636e<\/li>\n
    • (4)\u3001\u5408\u5e76\u540e\u653e\u5165\u5bc4\u5b58\u5668<\/li>\n
    • \u4ece\u4e0a\u8ff0\u6d41\u7a0b\u53ef\u5f97\u51fa\uff0c\u4e0d\u505a \u201c\u5185\u5b58\u5bf9\u9f50\u201d \u662f\u4e00\u4ef6\u6709\u70b9 "\u9ebb\u70e6" \u7684\u4e8b\u3002\u56e0\u4e3a\u5b83\u4f1a\u589e\u52a0\u8bb8\u591a\u8017\u8d39\u65f6\u95f4\u7684\u52a8\u4f5c<\/li>\n
    • \u800c\u5047\u8bbe\u505a\u4e86\u5185\u5b58\u5bf9\u9f50\uff0c\u4ece Index 0 \u5f00\u59cb\u8bfb\u53d6 4 \u4e2a\u5b57\u8282\uff0c\u53ea\u9700\u8981\u8bfb\u53d6\u4e00\u6b21\uff0c\u4e5f\u4e0d\u9700\u8981\u989d\u5916\u7684\u8fd0\u7b97\u3002\u8fd9\u663e\u7136\u9ad8\u6548\u5f88\u591a\uff0c\u662f\u6807\u51c6\u7684\u7a7a\u95f4\u6362\u65f6\u95f4\u6362\u65f6\u95f4\u7684\u505a\u6cd5<\/li>\n<\/ul>\n
        \n
      • 2\u3001\u5e73\u53f0\uff08\u79fb\u690d\u6027\uff09\u539f\u56e0\uff1a\u4e0d\u662f\u6240\u6709\u7684\u786c\u4ef6\u5e73\u53f0\u90fd\u80fd\u591f\u8bbf\u95ee\u4efb\u610f\u5730\u5740\u4e0a\u7684\u4efb\u610f\u6570\u636e\u3002\u4f8b\u5982\uff1a\u7279\u5b9a\u7684\u786c\u4ef6\u5e73\u53f0\u53ea\u5141\u8bb8\u5728\u7279\u5b9a\u5730\u5740\u83b7\u53d6\u7279\u5b9a\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5426\u5219\u4f1a\u5bfc\u81f4\u5f02\u5e38\u60c5\u51b5<\/li>\n<\/ul>\n
        \u200b   \u6211\u4eec\u4e3a\u4f55\u8981\u4e86\u89e3\u5185\u5b58\u5bf9\u9f50\uff1a<\/p>\n
          \n
        • 1\u3001\u4f60\u6b63\u5728\u7f16\u5199\u7684\u4ee3\u7801\u5728\u6027\u80fd\uff08CPU\u3001Memory\uff09\u65b9\u9762\u6709\u4e00\u5b9a\u7684\u8981\u6c42<\/li>\n
        • 2\u3001\u4f60\u6b63\u5728\u5904\u7406\u5411\u91cf\u65b9\u9762\u7684\u6307\u4ee4<\/li>\n
        • 3\u3001\u67d0\u4e9b\u786c\u4ef6\u5e73\u53f0\uff08ARM\uff09\u4f53\u7cfb\u4e0d\u652f\u6301\u672a\u5bf9\u9f50\u7684\u5185\u5b58\u8bbf\u95ee<\/li>\n<\/ul>\n
          \u4e09 \u5185\u5b58\u5bf9\u9f50\u89c4\u5219<\/h2>\n
          \u5148\u6765\u770b\u4e00\u4e2a\u793a\u4f8b1<\/p>\n
          type Part1 struct {\n    a bool\n    b int32\n    c int8\n    d int64\n    e byte\n}\n\nppp:=Part1{}  \/\/ \u96f6\u503c\u521d\u59cb\u5316\nfmt.Println(ppp)  \/\/ {false 0 0 0 0}\n\nfmt.Printf("bool size: %d\\n", unsafe.Sizeof(ppp.a))\nfmt.Printf("int32 size: %d\\n", unsafe.Sizeof(ppp.b))\nfmt.Printf("int8 size: %d\\n", unsafe.Sizeof(ppp.c))\nfmt.Printf("int64 size: %d\\n", unsafe.Sizeof(ppp.d))\nfmt.Printf("byte size: %d\\n", unsafe.Sizeof(ppp.e))<\/code><\/pre>\n
          \u8f93\u51fa\u7ed3\u679c<\/p>\n
          bool size: 1\nint32 size: 4\nint8 size: 1\nint64 size: 8\nbyte size: 1<\/code><\/pre>\n
          \u7ed3\u6784\u4f53Part1\u7684\u5b9e\u4f8bppp\u662f\u7531\u5176\u5185\u90e8\u7684\u5b57\u6bb5\u7ec4\u6210\u7684\uff0c\u6240\u4ee5\u5176\u5185\u90e8\u5b57\u6bb5\u5360\u636e\u5185\u5b58\u7684\u5927\u5c0f\u4e5f\u6b63\u662f\u8be5\u7ed3\u6784\u4f53\u7684\u5927\u5c0f\u3002ppp\u5185\u6240\u6709\u5b57\u6bb5\u5360\u7528\u5185\u5b58\u5927\u5c0f\u4e3a 1+4+1+8+1 = 15 \u4e2a\u5b57\u8282\uff0c\u4e5f\u5c31\u662f\u8bf4\u7ed3\u6784\u4f53\u5b9e\u4f8bppp\u7684\u5185\u5b58\u5927\u5c0f\u4e3a15\u4e2a\u5b57\u8282\uff0c\u770b\u4e0a\u53bb\u4e00\u70b9\u6bdb\u75c5\u4e5f\u6ca1\u6709\uff0c\u4f46\u5b9e\u9645\u60c5\u51b5\u662f<\/p>\n
          fmt.Printf("%d",unsafe.Sizeof(ppp))  \/\/ 32<\/code><\/pre>\n
          \u6700\u7ec8\u8f93\u51fa\u4e3a\u5360\u7528 32 \u4e2a\u5b57\u8282\u3002\u8fd9\u4e0e\u524d\u9762\u6240\u9884\u671f\u7684\u7ed3\u679c\u5b8c\u5168\u4e0d\u4e00\u6837\u3002\u8fd9\u5145\u5206\u5730\u8bf4\u660e\u4e86\u5148\u524d\u7684\u8ba1\u7b97\u65b9\u5f0f\u662f\u9519\u8bef\u7684\u3002\u4e3a\u4ec0\u4e48\u5462\uff1f\u7b54\u6848\u5c31\u662f\uff1a\u56e0\u4e3a \u201c\u5185\u5b58\u5bf9\u9f50\u201d \u7684\u5f71\u54cd\uff0c\u6570\u636e\u5728\u5185\u5b58\u4e2d\u7684\u5b58\u653e\u8d85\u51fa\u4e86\u5176\u672c\u8eab\u7684\u5927\u5c0f<\/p>\n
          \u50a8\u5907\u77e5\u8bc6\uff1a\u9ed8\u8ba4\u7cfb\u6570<\/strong><\/p>\n
          \u5728\u4e0d\u540c\u5e73\u53f0\u4e0a\u7684\u7f16\u8bd1\u5668\u90fd\u6709\u81ea\u5df1\u9ed8\u8ba4\u7684 \u201c\u5bf9\u9f50\u7cfb\u6570\u201d\uff0c\u53c8\u79f0\u4e3a\u7f16\u8bd1\u5668\u7684\u9ed8\u8ba4\u5bf9\u9f50\u957f\u5ea6\uff0c\u53ef\u901a\u8fc7\u9884\u7f16\u8bd1\u547d\u4ee4 #pragma pack(n) \u8fdb\u884c\u53d8\u66f4\uff0cn \u5c31\u662f\u4ee3\u6307 \u201c\u5bf9\u9f50\u7cfb\u6570\u201d\u3002\u4e00\u822c\u6765\u8bb2\uff0c\u6211\u4eec\u5e38\u7528\u7684\u5e73\u53f0\u7684\u7cfb\u6570\u5982\u4e0b\uff1a\n\n32 \u4f4d\uff1a4\n64 \u4f4d\uff1a8\n\u53e6\u5916\u8981\u6ce8\u610f\uff0c\u4e0d\u540c\u786c\u4ef6\u5e73\u53f0\u5360\u7528\u7684\u5927\u5c0f\u548c\u5bf9\u9f50\u503c\u90fd\u53ef\u80fd\u662f\u4e0d\u4e00\u6837\u7684\u3002\u56e0\u6b64\u672c\u6587\u7684\u503c\u4e0d\u662f\u552f\u4e00\u7684\uff0c\u8c03\u8bd5\u7684\u65f6\u5019\u9700\u6309\u672c\u673a\u7684\u5b9e\u9645\u60c5\u51b5\u8003\u8651<\/code><\/pre>\n
          \u5185\u5b58\u5bf9\u9f50\u89c4\u5219\uff1a<\/strong><\/p>\n
            \n
          • \n
            1\u3001\u7ed3\u6784\u4f53\u7684\u6210\u5458\u53d8\u91cf\uff0c\u7b2c\u4e00\u4e2a\u6210\u5458\u53d8\u91cf\u7684\u504f\u79fb\u91cf\u4e3a 0\u3002\u5f80\u540e\u7684\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u7684\u5bf9\u9f50\u503c\u5fc5\u987b\u4e3a\u7f16\u8bd1\u5668\u9ed8\u8ba4\u5bf9\u9f50\u957f\u5ea6\uff08#pragma pack(n)\uff09\u6216\u5f53\u524d\u6210\u5458\u53d8\u91cf\u7c7b\u578b\u7684\u957f\u5ea6\uff08unsafe.Sizeof\uff09\uff0c\u53d6\u6700\u5c0f\u503c\u4f5c\u4e3a\u5f53\u524d\u7c7b\u578b\u7684\u5bf9\u9f50\u503c\u3002\u5176\u504f\u79fb\u91cf\u5fc5\u987b\u4e3a\u5bf9\u9f50\u503c\u7684\u6574\u6570\u500d<\/p>\n<\/li>\n
          • \n
            2\u3001\u7ed3\u6784\u4f53\u672c\u8eab\uff0c\u5bf9\u9f50\u503c\u5fc5\u987b\u4e3a\u7f16\u8bd1\u5668\u9ed8\u8ba4\u5bf9\u9f50\u957f\u5ea6\uff08#pragma pack(n)\uff09\u6216\u7ed3\u6784\u4f53\u7684\u6240\u6709\u6210\u5458\u53d8\u91cf\u7c7b\u578b\u4e2d\u7684\u6700\u5927\u957f\u5ea6\uff0c\u53d6\u6700\u5927\u6570\u7684\u6700\u5c0f\u6574\u6570\u500d\u4f5c\u4e3a\u5bf9\u9f50\u503c<\/p>\n<\/li>\n
          • \n
            \u8865\u5145\uff1a<\/p>\n
            \/\/ \u7ed3\u5408\u4ee5\u4e0a\u4e24\u70b9\n\u53ef\u5f97\u77e5\u82e5\u7f16\u8bd1\u5668\u9ed8\u8ba4\u5bf9\u9f50\u957f\u5ea6\uff08#pragma pack(n)\uff09\u8d85\u8fc7\u7ed3\u6784\u4f53\u5185\u6210\u5458\u53d8\u91cf\u7684\u7c7b\u578b\u6700\u5927\u957f\u5ea6\u65f6\uff0c\u9ed8\u8ba4\u5bf9\u9f50\u957f\u5ea6\u662f\u6ca1\u6709\u4efb\u4f55\u610f\u4e49\u7684<\/code><\/pre>\n<\/li>\n<\/ul>\n
            \u56db \u5185\u5b58\u5bf9\u9f50\u6d41\u7a0b\u5206\u6790<\/h2>\n
            \u9488\u5bf9\u793a\u4f8b1\uff0c\u6211\u4eec\u6765\u5206\u4e00\u4e0b\u7ed3\u6784\u4f53ppp\u5230\u5e95\u7ecf\u5386\u4e86\u4ec0\u4e48<\/p>\n
            \"\"<\/div><\/p>\n
            \u6d41\u7a0b1\uff1a\u6210\u5458\u5bf9\u9f50<\/strong><\/p>\n
              \n
            • \u7b2c\u4e00\u4e2a\u6210\u5458 a\n
                \n
              • \u7c7b\u578b\u4e3a bool<\/li>\n
              • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 1 \u5b57\u8282<\/li>\n
              • \u521d\u59cb\u5730\u5740\uff0c\u504f\u79fb\u91cf\u4e3a 0\u3002\u5360\u7528\u4e86\u7b2c 1 \u4f4d<\/li>\n<\/ul>\n<\/li>\n
              • \u7b2c\u4e8c\u4e2a\u6210\u5458 b\n
                  \n
                • \u7c7b\u578b\u4e3a int32<\/li>\n
                • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 4 \u5b57\u8282<\/li>\n
                • \u6839\u636e\u89c4\u5219 1\uff0c\u5176\u504f\u79fb\u91cf\u5fc5\u987b\u4e3a 4 \u7684\u6574\u6570\u500d\u3002\u786e\u5b9a\u504f\u79fb\u91cf\u4e3a 4\uff0c\u56e0\u6b64 2-4 \u4f4d\u4e3a Padding\u3002\u800c\u5f53\u524d\u6570\u503c\u4ece\u7b2c 5 \u4f4d\u5f00\u59cb\u586b\u5145\uff0c\u5230\u7b2c 8 \u4f4d\u3002\u5982\u4e0b\uff1aaxxx|bbbb<\/li>\n<\/ul>\n<\/li>\n
                • \u7b2c\u4e09\u4e2a\u6210\u5458 c\n
                    \n
                  • \u7c7b\u578b\u4e3a int8<\/li>\n
                  • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 1 \u5b57\u8282<\/li>\n
                  • \u6839\u636e\u89c4\u52191\uff0c\u5176\u504f\u79fb\u91cf\u5fc5\u987b\u4e3a 1 \u7684\u6574\u6570\u500d\u3002\u5f53\u524d\u504f\u79fb\u91cf\u4e3a 8\u3002\u4e0d\u9700\u8981\u989d\u5916\u5bf9\u9f50\uff0c\u586b\u5145 1 \u4e2a\u5b57\u8282\u5230\u7b2c 9 \u4f4d\u3002\u5982\u4e0b\uff1aaxxx|bbbb|c…<\/li>\n<\/ul>\n<\/li>\n
                  • \u7b2c\u56db\u4e2a\u6210\u5458 d\n
                      \n
                    • \u7c7b\u578b\u4e3a int64<\/li>\n
                    • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 8 \u5b57\u8282<\/li>\n
                    • \u6839\u636e\u89c4\u5219 1\uff0c\u5176\u504f\u79fb\u91cf\u5fc5\u987b\u4e3a 8 \u7684\u6574\u6570\u500d\u3002\u786e\u5b9a\u504f\u79fb\u91cf\u4e3a 16\uff0c\u56e0\u6b64 9-16 \u4f4d\u4e3a Padding\u3002\u800c\u5f53\u524d\u6570\u503c\u4ece\u7b2c 17 \u4f4d\u5f00\u59cb\u5199\u5165\uff0c\u5230\u7b2c 24 \u4f4d\u3002\u5982\u4e0b\uff1aaxxx|bbbb|cxxx|xxxx|dddd|dddd<\/li>\n<\/ul>\n<\/li>\n
                    • \u7b2c\u4e94\u4e2a\u6210\u5458 e\n
                        \n
                      • \u7c7b\u578b\u4e3a byte<\/li>\n
                      • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 1 \u5b57\u8282<\/li>\n
                      • \u6839\u636e\u89c4\u5219 1\uff0c\u5176\u504f\u79fb\u91cf\u5fc5\u987b\u4e3a 1 \u7684\u6574\u6570\u500d\u3002\u5f53\u524d\u504f\u79fb\u91cf\u4e3a 24\u3002\u4e0d\u9700\u8981\u989d\u5916\u5bf9\u9f50\uff0c\u586b\u5145 1 \u4e2a\u5b57\u8282\u5230\u7b2c 25 \u4f4d\u3002\u5982\u4e0b\uff1aaxxx|bbbb|cxxx|xxxx|dddd|dddd|e…<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
                        \u6d41\u7a0b2\uff1a\u6574\u4f53\u5bf9\u9f50<\/strong><\/p>\n
                        \u5728\u6bcf\u4e2a\u6210\u5458\u53d8\u91cf\u8fdb\u884c\u5bf9\u9f50\u540e\uff0c\u6839\u636e\u89c4\u5219 2\uff0c\u6574\u4e2a\u7ed3\u6784\u4f53\u672c\u8eab\u4e5f\u8981\u8fdb\u884c\u5b57\u8282\u5bf9\u9f50\uff0c\u56e0\u4e3a\u53ef\u53d1\u73b0\u5b83\u53ef\u80fd\u5e76\u4e0d\u662f 2^n<\/code>\uff0c\u4e0d\u662f\u5076\u6570\u500d\u3002\u663e\u7136\u4e0d\u7b26\u5408\u5bf9\u9f50\u7684\u89c4\u5219<\/p>\n
                        \u6839\u636e\u89c4\u5219 2\uff0c\u53ef\u5f97\u51fa\u5bf9\u9f50\u503c\u4e3a 8\u3002\u73b0\u5728\u7684\u504f\u79fb\u91cf\u4e3a 25\uff0c\u4e0d\u662f 8 \u7684\u6574\u500d\u6570\u3002\u56e0\u6b64\u786e\u5b9a\u504f\u79fb\u91cf\u4e3a 32\u3002\u5bf9\u7ed3\u6784\u4f53\u8fdb\u884c\u5bf9\u9f50<\/p>\n
                        \u6d41\u7a0b3\uff1a\u7ed3\u679c<\/strong><\/p>\n
                        ppp\u5185\u5b58\u5e03\u5c40\uff1aaxxx|bbbb|cxxx|xxxx|dddd|dddd|exxx|xxxx<\/p>\n
                        \u5c0f\u7ed3<\/strong><\/p>\n
                        \u901a\u8fc7\u672c\u8282\u7684\u5206\u6790\uff0c\u53ef\u5f97\u77e5\u5148\u524d\u7684 \u201c\u63a8\u7b97\u201d \u4e3a\u4ec0\u4e48\u9519\u8bef\uff1f<\/p>\n
                        \u662f\u56e0\u4e3a\u5b9e\u9645\u5185\u5b58\u7ba1\u7406\u5e76\u975e \u201c\u4e00\u4e2a\u841d\u535c\u4e00\u4e2a\u5751\u201d \u7684\u601d\u60f3\u3002\u800c\u662f\u4e00\u5757\u4e00\u5757\u3002\u901a\u8fc7\u7a7a\u95f4\u6362\u65f6\u95f4\uff08\u6548\u7387\uff09\u7684\u601d\u60f3\u6765\u5b8c\u6210\u8fd9\u5757\u8bfb\u53d6\u3001\u5199\u5165\u3002\u53e6\u5916\u4e5f\u9700\u8981\u517c\u987e\u4e0d\u540c\u5e73\u53f0\u7684\u5185\u5b58\u64cd\u4f5c\u60c5\u51b5<\/p>\n
                        \u4e94 \u5185\u5b58\u5bf9\u9f50\u4f18\u5316<\/h2>\n
                        \u5185\u5b58\u5bf9\u9f50\u4f18\u5316\u7ecf\u9a8c\uff1a\u5c3d\u53ef\u80fd\u5c06\u5927\u5c0f\u6bd4\u8f83\u5c0f\u7684\u90a3\u4e9b\u6570\u636e\u7c7b\u578b\u5f80\u524d\u653e<\/strong><\/p>\n
                        \u5728\u4e0a\u4e00\u5c0f\u8282\uff0c\u53ef\u5f97\u77e5\u6839\u636e\u6210\u5458\u53d8\u91cf\u7684\u7c7b\u578b\u4e0d\u540c\uff0c\u5176\u7ed3\u6784\u4f53\u7684\u5185\u5b58\u4f1a\u4ea7\u751f\u5bf9\u9f50\u7b49\u52a8\u4f5c\u3002\u90a3\u5047\u8bbe\u5b57\u6bb5\u987a\u5e8f\u4e0d\u540c\uff0c\u4f1a\u4e0d\u4f1a\u6709\u4ec0\u4e48\u53d8\u5316\u5462\uff1f\u6211\u4eec\u4e00\u8d77\u6765\u8bd5\u8bd5\u5427 <\/p>\n
                        type Part1 struct {\n    a bool\n    b int32\n    c int8\n    d int64\n    e byte\n}\n\ntype Part2 struct {\n    e byte\n    c int8\n    a bool\n    b int32\n    d int64\n}\n\nppp1 := Part1{}\nppp2 := Part2{}\n\nfmt.Printf("ppp1 size: %d, align: %d\\n", unsafe.Sizeof(ppp1), unsafe.Alignof(ppp1))\nfmt.Printf("ppp2 size: %d, align: %d\\n", unsafe.Sizeof(ppp2), unsafe.Alignof(ppp2))<\/code><\/pre>\n
                        \u8f93\u51fa<\/p>\n
                        ppp1 size: 32, align: 8\nppp2 size: 16, align: 8<\/code><\/pre>\n
                        \u901a\u8fc7\u7ed3\u679c\u53ef\u4ee5\u60ca\u559c\u7684\u53d1\u73b0\uff0c\u53ea\u662f \u201c\u7b80\u5355\u201d \u5bf9\u6210\u5458\u53d8\u91cf\u7684\u5b57\u6bb5\u987a\u5e8f\u8fdb\u884c\u6539\u53d8\uff0c\u5c31\u6539\u53d8\u4e86\u7ed3\u6784\u4f53\u5360\u7528\u5927\u5c0f<\/p>\n
                        \u63a5\u4e0b\u6765\u6211\u4eec\u4e00\u8d77\u5256\u6790\u4e00\u4e0b ppp2<\/code>\uff0c\u770b\u770b\u5b83\u7684\u5185\u90e8\u5230\u5e95\u548c\u4e0a\u4e00\u4f4d\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff0c\u624d\u5bfc\u81f4\u4e86\u8fd9\u6837\u7684\u7ed3\u679c\uff1f<\/p>\n
                        \u5206\u6790\u6d41\u7a0b<\/strong><\/p>\n
                        \"\"<\/div><\/p>\n
                        \u6d41\u7a0b1\uff1a\u6210\u5458\u5bf9\u9f50<\/strong><\/p>\n
                          \n
                        • \u7b2c\u4e00\u4e2a\u6210\u5458 e\n
                            \n
                          • \u7c7b\u578b\u4e3a byte<\/li>\n
                          • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 1 \u5b57\u8282<\/li>\n
                          • \u521d\u59cb\u5730\u5740\uff0c\u504f\u79fb\u91cf\u4e3a 0\u3002\u5360\u7528\u4e86\u7b2c 1 \u4f4d<\/li>\n<\/ul>\n<\/li>\n
                          • \u7b2c\u4e8c\u4e2a\u6210\u5458 c\n
                              \n
                            • \u7c7b\u578b\u4e3a int8<\/li>\n
                            • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 1 \u5b57\u8282<\/li>\n
                            • \u6839\u636e\u89c4\u52191\uff0c\u5176\u504f\u79fb\u91cf\u5fc5\u987b\u4e3a 1 \u7684\u6574\u6570\u500d\u3002\u5f53\u524d\u504f\u79fb\u91cf\u4e3a 2\u3002\u4e0d\u9700\u8981\u989d\u5916\u5bf9\u9f50<\/li>\n<\/ul>\n<\/li>\n
                            • \u7b2c\u4e09\u4e2a\u6210\u5458 a\n
                                \n
                              • \u7c7b\u578b\u4e3a bool<\/li>\n
                              • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 1 \u5b57\u8282<\/li>\n
                              • \u6839\u636e\u89c4\u52191\uff0c\u5176\u504f\u79fb\u91cf\u5fc5\u987b\u4e3a 1 \u7684\u6574\u6570\u500d\u3002\u5f53\u524d\u504f\u79fb\u91cf\u4e3a 3\u3002\u4e0d\u9700\u8981\u989d\u5916\u5bf9\u9f50<\/li>\n<\/ul>\n<\/li>\n
                              • \u7b2c\u56db\u4e2a\u6210\u5458 b\n
                                  \n
                                • \u7c7b\u578b\u4e3a int32<\/li>\n
                                • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 4 \u5b57\u8282<\/li>\n
                                • \u6839\u636e\u89c4\u52191\uff0c\u5176\u504f\u79fb\u91cf\u5fc5\u987b\u4e3a 4 \u7684\u6574\u6570\u500d\u3002\u786e\u5b9a\u504f\u79fb\u91cf\u4e3a 4\uff0c\u56e0\u6b64\u7b2c 3 \u4f4d\u4e3a Padding\u3002\u800c\u5f53\u524d\u6570\u503c\u4ece\u7b2c 4 \u4f4d\u5f00\u59cb\u586b\u5145\uff0c\u5230\u7b2c 8 \u4f4d\u3002\u5982\u4e0b\uff1aecax|bbbb<\/li>\n<\/ul>\n<\/li>\n
                                • \u7b2c\u4e94\u4e2a\u6210\u5458 d\n
                                    \n
                                  • \u7c7b\u578b\u4e3a int64<\/li>\n
                                  • \u5927\u5c0f\/\u5bf9\u9f50\u503c\u4e3a 8 \u5b57\u8282<\/li>\n
                                  • \u6839\u636e\u89c4\u52191\uff0c\u5176\u504f\u79fb\u91cf\u5fc5\u987b\u4e3a 8 \u7684\u6574\u6570\u500d\u3002\u5f53\u524d\u504f\u79fb\u91cf\u4e3a 8\u3002\u4e0d\u9700\u8981\u989d\u5916\u5bf9\u9f50\uff0c\u4ece 9-16 \u4f4d\u586b\u5145 8 \u4e2a\u5b57\u8282\u3002\u5982\u4e0b\uff1aecax|bbbb|dddd|dddd<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
                                    \u6d41\u7a0b2\uff1a\u6574\u4f53\u5bf9\u9f50<\/strong><\/p>\n
                                    \u7b26\u5408\u89c4\u5219 2\uff0c\u4e0d\u9700\u8981\u989d\u5916\u5bf9\u9f50<\/p>\n
                                    \u6d41\u7a0b3\uff1a\u7ed3\u679c<\/strong><\/p>\n
                                    ppp2 \u5185\u5b58\u5e03\u5c40\uff1aecax|bbbb|dddd|dddd<\/p>\n
                                    \u603b\u7ed3<\/strong><\/p>\n
                                    \u901a\u8fc7\u5bf9\u6bd4 ppp1<\/code> \u548c ppp2<\/code> \u7684\u5185\u5b58\u5e03\u5c40\uff0c\u4f60\u4f1a\u53d1\u73b0\u4e24\u8005\u6709\u5f88\u5927\u7684\u4e0d\u540c\u3002\u5982\u4e0b\uff1a<\/p>\n
                                      \n
                                    • ppp1\uff1aaxxx|bbbb|cxxx|xxxx|dddd|dddd|exxx|xxxx<\/li>\n
                                    • ppp2\uff1aecax|bbbb|dddd|dddd<\/li>\n<\/ul>\n
                                      \u4ed4\u7ec6\u4e00\u770b\uff0cppp1<\/code> \u5b58\u5728\u8bb8\u591a Padding\u3002\u663e\u7136\u5b83\u5360\u636e\u4e86\u4e0d\u5c11\u7a7a\u95f4\uff0c\u90a3\u4e48 Padding \u662f\u600e\u4e48\u51fa\u73b0\u7684\u5462\uff1f<\/p>\n
                                      \u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u53ef\u5f97\u77e5\u662f\u7531\u4e8e\u4e0d\u540c\u7c7b\u578b\u5bfc\u81f4\u9700\u8981\u8fdb\u884c\u5b57\u8282\u5bf9\u9f50\uff0c\u4ee5\u6b64\u4fdd\u8bc1\u5185\u5b58\u7684\u8bbf\u95ee\u8fb9\u754c<\/p>\n
                                      \u90a3\u4e48\u4e5f\u4e0d\u96be\u7406\u89e3\uff0c\u4e3a\u4ec0\u4e48\u8c03\u6574\u7ed3\u6784\u4f53\u5185\u6210\u5458\u53d8\u91cf\u7684\u5b57\u6bb5\u987a\u5e8f<\/strong>\u5c31\u80fd\u8fbe\u5230\u7f29\u5c0f\u7ed3\u6784\u4f53\u5360\u7528\u5927\u5c0f\u7684\u7591\u95ee\u4e86\uff0c\u662f\u56e0\u4e3a\u5de7\u5999\u5730\u51cf\u5c11\u4e86 Padding \u7684\u5b58\u5728\u3002\u8ba9\u5b83\u4eec\u66f4 \u201c\u7d27\u51d1\u201d \u4e86\u3002\u8fd9\u4e00\u70b9\u5bf9\u4e8e\u52a0\u6df1 Go \u7684\u5185\u5b58\u5e03\u5c40\u5370\u8c61\u548c\u5927\u5bf9\u8c61\u7684\u4f18\u5316\u975e\u5e38\u6709\u5e2e<\/p>\n
                                      \u5f53\u7136\u4e86\uff0c\u6ca1\u4ec0\u4e48\u7279\u6b8a\u95ee\u9898\uff0c\u4f60\u53ef\u4ee5\u4e0d\u5173\u6ce8\u8fd9\u4e00\u5757\u3002\u4f46\u4f60\u8981\u77e5\u9053\u8fd9\u5757\u77e5\u8bc6\u70b9<\/p>\n","protected":false},"excerpt":{"rendered":"
                                      Go\u8bed\u8a00\u5185\u5b58\u5bf9\u9f50 \u4e00 \u5185\u5b58\u8bbf\u95ee\u7c92\u5ea6 \u5185\u5b58\u7a7a\u95f4\u662f\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u8fde\u7eed\u7f16\u5740\u7684\u3002\u5982\u679c\u628a\u5185\u5b58\u5355\u5143\u6bd4\u55bb\u4e3a\u5c0f\u67dc\u5b50\uff0c\u90a3\u4e48\u5185\u5355\u5143\u7684 […]<\/p>\n","protected":false},"author":3,"featured_media":2700,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[253],"tags":[260,261,263,262],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/1961"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1961"}],"version-history":[{"count":0,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/1961\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/media\/2700"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}