sqlite3 解决并发读写冲突的问题

 #include "stdafx.h"
 #include "sqlite3.h"
 #include <iostream>
 #include <process.h>

 //sqllite 相关变量
 sqlite3 *sql_db;
 char *sql_ErrMsg;
 int sql_rc;
 sqlite3_stmt *sql_statement;

 //写入重试客克服锁库的问题
 void sql_insert_proc(char insert_state[])
 {
     while ()
     {
         if (SQLITE_OK != sqlite3_exec(sql_db, insert_state, , , &sql_ErrMsg))
         {
             if (strstr(sql_ErrMsg, "database is locked"))
             {
                 printf("try again!\n");
                 continue;
             }
             else
             {
                 printf("other error! \n");
                 break;
             }
         }
         else
         {
             printf("ok insert !\n");
             break;
         }
     }
 }

 int _tmain(int argc, _TCHAR* argv[])
 {
     sql_rc = sqlite3_open("C:\\SQLite\\test.db", &sql_db);
     if (sql_rc){
         fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(sql_db));
         sqlite3_close(sql_db);
         return();
     }
     printf("hello world!\n");
     getchar();
     int i;

     for (i = ; i < ; i++)
     {
         int step_result = SQLITE_BUSY;
         char select_statement[] = "";
         char selectname[] = "";

         //读取重试克服锁库的问题
         //SQLITE_ERROR、SQLITE_BUSY、SQLITE_MISUSE、SQLITE_ROW、SQLITE_DONE
         while (step_result == SQLITE_BUSY)
         {
             memset(select_statement, , );
             memset(selectname, , );

             sprintf_s(select_statement, "select name from test order by id desc limit 1");

             sql_rc = sqlite3_prepare(sql_db, select_statement, -, &sql_statement, NULL);

             if (sql_rc != SQLITE_OK)
             {
                 fprintf(stderr, "prepare error return code = %d\n", sql_rc);
             }

             step_result = sqlite3_step(sql_statement);

             while (step_result == SQLITE_ROW)
             {
                 strcpy_s(selectname, (char *)sqlite3_column_text(sql_statement, ));
                 step_result = sqlite3_step(sql_statement);
             }

             sqlite3_finalize(sql_statement);
         }

         printf("index = %d : %s\n", i, selectname);
     }

     /*
     for (i = 0; i < 10000; i++)
     {
         char insert_statement[400] = "";
         sprintf_s(insert_statement, "insert into test (name) values('proc1 hello %d')", i);
         printf("%s\n", insert_statement);
         sql_insert_proc(insert_statement);
     }
     */

     sqlite3_close(sql_db);
     return ;
 }