{"id":166965,"date":"2024-11-05T21:14:20","date_gmt":"2024-11-05T13:14:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/166965\/"},"modified":"2024-11-05T21:14:21","modified_gmt":"2024-11-05T13:14:21","slug":"%e5%88%a9%e7%94%a8-c-%e5%a4%9a%e7%b7%9a%e7%a8%8b%e5%af%a6%e7%8f%be%e5%85%b1%e4%ba%ab%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-c-%e5%a4%9a%e7%b7%9a%e7%a8%8b-%e5%85%b1%e4%ba%ab%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/166965\/","title":{"rendered":"\u5229\u7528 C \u591a\u7dda\u7a0b\u5be6\u73fe\u5171\u4eab\u6578\u64da\u5eab\u9023\u63a5 (c \u591a\u7dda\u7a0b \u5171\u4eab\u6578\u64da\u5eab\u9023\u63a5)"},"content":{"rendered":"

\u5229\u7528 C \u591a\u7dda\u7a0b\u5be6\u73fe\u5171\u4eab\u6578\u64da\u5eab\u9023\u63a5<\/h1>\n

\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u9ad8\u6548\u8a2a\u554f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u96a8\u8457\u591a\u7dda\u7a0b\u7de8\u7a0b\u7684\u666e\u53ca\uff0c\u5982\u4f55\u5728 C \u8a9e\u8a00\u4e2d\u5be6\u73fe\u5171\u4eab\u6578\u64da\u5eab\u9023\u63a5\u6210\u70ba\u4e86\u4e00\u500b\u71b1\u9580\u8a71\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528 C \u8a9e\u8a00\u7684\u591a\u7dda\u7a0b\u7279\u6027\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u9023\u63a5\u7684\u5171\u4eab\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u5efa\u8b70\u3002<\/p>\n

\u591a\u7dda\u7a0b\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

\u591a\u7dda\u7a0b\u662f\u4e00\u7a2e\u5141\u8a31\u540c\u6642\u57f7\u884c\u591a\u500b\u7dda\u7a0b\u7684\u6280\u8853\u3002\u6bcf\u500b\u7dda\u7a0b\u53ef\u4ee5\u7368\u7acb\u57f7\u884c\u4efb\u52d9\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u97ff\u61c9\u901f\u5ea6\u3002\u5728 C \u8a9e\u8a00\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528 POSIX \u7dda\u7a0b\uff08pthread\uff09\u5eab\u4f86\u5be6\u73fe\u591a\u7dda\u7a0b\u7de8\u7a0b\u3002<\/p>\n

\u70ba\u4ec0\u9ebc\u9700\u8981\u5171\u4eab\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n

\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u6bcf\u500b\u7dda\u7a0b\u90fd\u9700\u8981\u8a2a\u554f\u6578\u64da\u5eab\u3002\u5982\u679c\u6bcf\u500b\u7dda\u7a0b\u90fd\u5275\u5efa\u81ea\u5df1\u7684\u6578\u64da\u5eab\u9023\u63a5\uff0c\u5c07\u6703\u5c0e\u81f4\u8cc7\u6e90\u7684\u6d6a\u8cbb\u548c\u6027\u80fd\u7684\u4e0b\u964d\u3002\u5171\u4eab\u6578\u64da\u5eab\u9023\u63a5\u53ef\u4ee5\u6e1b\u5c11\u9023\u63a5\u7684\u958b\u92b7\uff0c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6548\u7387\u3002<\/p>\n

\u5be6\u73fe\u5171\u4eab\u6578\u64da\u5eab\u9023\u63a5\u7684\u6b65\u9a5f<\/h2>\n

1. \u521d\u59cb\u5316\u6578\u64da\u5eab\u9023\u63a5<\/h3>\n

\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b\u6578\u64da\u5eab\u9023\u63a5\u3002\u9019\u901a\u5e38\u5728\u4e3b\u7dda\u7a0b\u4e2d\u5b8c\u6210\uff0c\u7136\u5f8c\u5c07\u8a72\u9023\u63a5\u50b3\u905e\u7d66\u5176\u4ed6\u7dda\u7a0b\u4f7f\u7528\u3002<\/p>\n

\n#include <stdio.h>\n#include <stdlib.h>\n#include <pthread.h>\n#include <mysql\/mysql.h>\n\nMYSQL *conn;\n\nvoid *thread_function(void *arg) {\n    \/\/ \u4f7f\u7528\u5171\u4eab\u7684\u6578\u64da\u5eab\u9023\u63a5\n    if (mysql_query(conn, \"SELECT * FROM my_table\")) {\n        fprintf(stderr, \"Query failed: %sn\", mysql_error(conn));\n    }\n    return NULL;\n}\n\nint main() {\n    conn = mysql_init(NULL);\n    mysql_real_connect(conn, \"host\", \"user\", \"password\", \"database\", 0, NULL, 0);\n    \n    pthread_t threads[5];\n    for (int i = 0; i < 5; i++) {\n        pthread_create(&threads[i], NULL, thread_function, NULL);\n    }\n    \n    for (int i = 0; i < 5; i++) {\n        pthread_join(threads[i], NULL);\n    }\n    \n    mysql_close(conn);\n    return 0;\n}\n<\/code><\/pre>\n
2. \u4f7f\u7528\u4e92\u65a5\u9396\u4fdd\u8b77\u6578\u64da\u5eab\u64cd\u4f5c<\/h3>\n
\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u5c0d\u5171\u4eab\u8cc7\u6e90\u7684\u8a2a\u554f\u9700\u8981\u9032\u884c\u540c\u6b65\uff0c\u4ee5\u907f\u514d\u6578\u64da\u7af6\u722d\u3002\u53ef\u4ee5\u4f7f\u7528\u4e92\u65a5\u9396\uff08mutex\uff09\u4f86\u4fdd\u8b77\u5c0d\u6578\u64da\u5eab\u7684\u8a2a\u554f\u3002<\/p>\n
\npthread_mutex_t lock;\n\nvoid *thread_function(void *arg) {\n    pthread_mutex_lock(&lock);\n    if (mysql_query(conn, \"SELECT * FROM my_table\")) {\n        fprintf(stderr, \"Query failed: %sn\", mysql_error(conn));\n    }\n    pthread_mutex_unlock(&lock);\n    return NULL;\n}\n\nint main() {\n    pthread_mutex_init(&lock, NULL);\n    \/\/ \u5176\u4ed6\u4ee3\u78bc...\n    pthread_mutex_destroy(&lock);\n    return 0;\n}\n<\/code><\/pre>\n
3. \u6e05\u7406\u8cc7\u6e90<\/h3>\n
\u5728\u7a0b\u5e8f\u7d50\u675f\u6642\uff0c\u78ba\u4fdd\u91cb\u653e\u6240\u6709\u8cc7\u6e90\uff0c\u5305\u62ec\u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5\u548c\u92b7\u6bc0\u4e92\u65a5\u9396\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5229\u7528 C \u8a9e\u8a00\u7684\u591a\u7dda\u7a0b\u7279\u6027\u4f86\u5be6\u73fe\u5171\u4eab\u6578\u64da\u5eab\u9023\u63a5\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u901a\u904e\u6b63\u78ba\u7684\u521d\u59cb\u5316\u3001\u4f7f\u7528\u4e92\u65a5\u9396\u4fdd\u8b77\u6578\u64da\u5eab\u64cd\u4f5c\u4ee5\u53ca\u9069\u7576\u7684\u8cc7\u6e90\u6e05\u7406\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u7684\u6578\u64da\u5eab\u8a2a\u554f\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9019\u7a2e\u65b9\u6cd5\u662f\u975e\u5e38\u503c\u5f97\u8003\u616e\u7684\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u591a\u7dda\u7a0b\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK \u63d0\u4f9b\u4e86\u7a69\u5b9a\u7684 \u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u9023\u63a5\u548c\u5176\u4ed6\u8cc7\u6e90\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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