以下是一个使用C语言编写的MySQL预处理的示例代码，实现了从数据库中获取信息并释放资源：
#include <stdio.h>#include <stdlib.h>#include <mysql/mysql.h>int main() {MYSQL *conn;MYSQL_STMT *stmt;MYSQL_BIND params[1];MYSQL_RES *result;MYSQL_ROW row;// 初始化连接conn = mysql_init(NULL);// 建立连接if (mysql_real_connect(conn, "localhost", "username", "password", "database_name", 0, NULL, 0) == NULL) {fprintf(stderr, "%s\n", mysql_error(conn));exit(1);}// 准备预处理语句stmt = mysql_stmt_init(conn);const char *sql = "SELECT name FROM users WHERE age > ?";if (mysql_stmt_prepare(stmt, sql, strlen(sql))) {fprintf(stderr, "%s\n", mysql_error(conn));exit(1);}int age = 30;// 绑定参数memset(params, 0, sizeof(params));params[0].buffer_type = MYSQL_TYPE_LONG;params[0].buffer = &age;if (mysql_stmt_bind_param(stmt, params)) {fprintf(stderr, "%s\n", mysql_error(conn));exit(1);}// 执行查询if (mysql_stmt_execute(stmt)) {fprintf(stderr, "%s\n", mysql_error(conn));exit(1);}// 获取结果集合并打印数据result = mysql_stmt_result_metadata(stmt);while ((row = mysql_fetch_row(result))) {printf("%s\n", row[0]);}// 释放资源mysql_free_result(result);mysql_stmt_close(stmt);mysql_close(conn);return 0;}
请根据实际情况修改数据库连接信息、查询语句和参数绑定方式。记得使用正确的用户名、密码、数据库名以及相应的表和字段名。
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![/data # iw --debug dev wlan0 connect -w "lucky-5g" auth open key 0:1234567890
Usage: iw [options] dev connect [-w] [] [] [auth open|shared] [key 0:abcde d:1:6162636465] [mfp:req/opt/no]
Join the network with ...](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162239148267954.png)
![驱动代码
void kalRxTaskletSchedule(struct GLUE_INFO *pr)
{
static unsigned int num = 0;
tasklet_hi_schedule(&pr->rRxTask[(num++)%NR_CPUS]);
// tasklet_hi_schedule(&pr->rRxTask);
DBGLOG(HAL, ERROR,](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162226144313964.png)
