Sqlite3.78移植到VxWorks6.6

1、准备工作

    首先从网上下载一个Sqlite Developer 3.8.5管理工具,SharpPlus Sqlite Developer, 强大的Sqlite3数据库管理程序，具有如下功能：

☆、强大的SQL编辑器

☆、Sqlite Sql语法高亮

☆、Sql编辑历史

☆、Sql关键字自动完成

☆、括号高亮匹配

☆、表，字段名自动完成

☆、自动SQL语法错误提示

☆、支持Unicode

☆、SQL代码格式化器

☆、支持ANSI，UTF8和UTF16数据编辑.

☆、可定制的数据类型映射.

☆、可执行分号分割的多条SQL语句.

☆、SQL执行监视器.

☆、可视化查询设计器.

☆、可视化表 ,视图 ,触发器和索引编辑.

☆、可按文本，16进制，HTML或者位图形式编辑数据.

☆、支持查看和编辑临时表，视图和触发器.

☆、支持查询计划.

☆、自动更新.

☆、可以将数据导出为sql,csv,excel, word, html, xml.

☆、可以导入csv文件.

☆、可以导出数据库的元数据.

☆、支持数据库元数据查找

☆、可以中断长时间查询

☆、支持Sqlite可加载扩展及虚拟表

☆、多语言支持(英语,简体中文，日语)

其次从sqlite官方网上http://www.sqlite.org/download.html下载一个Sqlite3.85开源代码，怎么下载应该比较简单了！

打开Sqlite Developer程序，上面的Sample.db将是我们测试的数据源，我们将利用该数据库的部门表见下图“DEPARTMENT”进行验证是否正确，安装之后把Sample.db文件拷贝至$(FEPHOME)/db/目录下，在$(FEPHOME)/code/目录新建文件夹sqlite378，把下载的sqlite3.78包中的sqlite3.h和sqlite3ext.h拷贝此处。

 

2、测试代码

[cpp] view plaincopy

1. // testSQlite378.cpp : Defines the entry point for the console application.  
2. //  
3.   
4. #include "stdafx.h"  
5. #include <stdio.h>  
6. #include <stdlib.h>  
7. #include <string.h>  
8. #include "sqlite378/sqlite3.h" // $(FEPHOME)/code/inlcude/sqlite378  
9.   
10. int main(int argc, char* argv[])  
11. {  
12.     sqlite3 *db = NULL;  
13.     char *zErrMsg = 0;  
14.     int rc;  
15.     char *szWorkPath = "/e/openSUSE3000/fep/db/Sample.db3";  
16.     rc = sqlite3_open(szWorkPath, &db); // 打开指定的数据库文件.  
17.     if (rc)  
18.     {  
19.         fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));  
20.         sqlite3_close(db);  
21.         return (1);  
22.     }  
23.     else   
24.     {  
25.         printf("You have opened a sqlite3 database named Sample.db3 successfully!\n");  
26.       
27.     }  
28.       
29.     int nrow = 0, ncolumn = 0;  
30.     char **azResult; // 二维数组存放结果  
31.       
32.     // 查询数据  
33.     char *sql = "SELECT * FROM DEPARTMENT";  
34.     sqlite3_get_table(db, sql , &azResult , &nrow , &ncolumn , &zErrMsg);  
35.     int i = 0 ;  
36.     printf("row:%d column=%d \n" , nrow , ncolumn);  
37.     printf("\nThe result of querying is : \n");  
38.     for (i = 0 ; i < ( nrow + 1 ) * ncolumn ; i++)  
39.         printf("azResult[%d] = %s\n", i , azResult[i]);  
40.       
41.     // 释放掉  azResult 的内存空间  
42.     sqlite3_free_table(azResult);  
43.       
44. #ifdef _DEBUG_  
45.     printf("zErrMsg = %s \n", zErrMsg);  
46. #endif  
47.       
48.     sqlite3_close(db); // 关闭数据库  
49.     return 0;  
50. }     

3、生成库代码libsqlite378

在生成库时需要一些配置，具体内容如下：

DEFINES:-DOS_VXWORKS=1 -D_HAVE_SQLITE_CONFIG_H -DSQLITE_THREADSAFE=0

OS_VXWORKS：说明使用操作系统VxWorks.

_HAVE_SQLITE_CONFIG_H：将使用配置文件“config.h”

[cpp] view plaincopy

1. #ifndef _CONFIG_H_  
2. #define _CONFIG_H_  
3.   
4. #define SQLITE_OMIT_LOAD_EXTENSION   1   // 不需要动态库支持  
5. #define HAVE_UTIME                          // 使用utime函数而不是utimes函数  
6. #include <semaphore.h>  
7. /*  
8. * 不使用VxWorks提供的POSIX标准中的互斥信号量递归接口,因为对于内核程序,POSIX支持* 的不是太好 
9. */  
10. #define SQLITE_HOMEGROWN_RECURSIVE_MUTEX    1     
11. #include <vxWorks.h>       
12. #endif // _CONFIG_H_  

SQLITE_THREADSAFE=<0 or 1 or 2>

This option controls whether or not code is included in SQLite to enable it to operate safely in a multithreaded environment. The default is SQLITE_THREADSAFE=1 which is safe for use in a multithreaded environment. When compiled with SQLITE_THREADSAFE=0 all mutexing code is omitted and it is unsafe to use SQLite in a multithreaded program. When compiled with SQLITE_THREADSAFE=2, SQLite can be used in a multithreaded program so long as no two threads attempt to use the same database connection at the same time.

To put it another way, SQLITE_THREADSAFE=1 sets the default threading mode to Serialized. SQLITE_THREADSAFE=2 sets the default threading mode to Multi-threaded. And SQLITE_THREADSAFE=0 sets the threading mode to Single-threaded.

The value of SQLITE_THREADSAFE can be determined at run-time using the sqlite3_threadsafe() interface.

When SQLite has been compiled with SQLITE_THREADSAFE=1 or SQLITE_THREADSAFE=2 then thethreading mode can be altered at run-time using the sqlite3_config() interface together with one of these verbs:

• SQLITE_CONFIG_SINGLETHREAD
• SQLITE_CONFIG_MULTITHREAD
• SQLITE_CONFIG_SERIALIZED

The SQLITE_OPEN_NOMUTEX and SQLITE_OPEN_FULLMUTEX flags to sqlite3_open_v2() can also be used to adjust the threading mode of individual database connections at run-time.

Note that when SQLite is compiled with SQLITE_THREADSAFE=0, the code to make SQLite threadsafe is omitted from the build. When this occurs, it is impossible to change the threading mode at start-time or run-time.

See the threading mode documentation for additional information on aspects of using SQLite in a multithreaded environment.

3、调试代码testsqlite378

    testsqlite378生成比较简单，具体可以看前面关于嵌入系统调试的内容了。

4、Console输出的内容:

You have opened a sqlite3 database named Sample.db3 successfully!

row:21 column=7

 

The result of querying is :

azResult[0] = DEPT_NO

azResult[1] = DEPARTMENT

azResult[2] = HEAD_DEPT

azResult[3] = MNGR_NO

azResult[4] = BUDGET

azResult[5] = LOCATION

azResult[6] = PHONE_NO

azResult[7] = 000

azResult[8] = Corporate Headquarters

azResult[9] =

azResult[10] = 105

azResult[11] = 1000000

azResult[12] = Monterey

azResult[13] = [phone]

azResult[14] = 100

azResult[15] = Sales and Marketing

azResult[16] = 000

azResult[17] = 85

azResult[18] = 2000000

azResult[19] = San Francisco

azResult[20] = [phone]

azResult[21] = 600

azResult[22] = Engineering

azResult[23] = 000

azResult[24] = 2

azResult[25] = 1100000

azResult[26] = Monterey

azResult[27] = [phone]

azResult[28] = 900

azResult[29] = Finance

azResult[30] = 000

azResult[31] = 46

azResult[32] = 400000

azResult[33] = Monterey

azResult[34] = [phone]

azResult[35] = 180

azResult[36] = Marketing

azResult[37] = 100

azResult[38] =

azResult[39] = 1500000

azResult[40] = San Francisco

azResult[41] = [phone]

azResult[42] = 620

azResult[43] = Software Products Div.

azResult[44] = 600

azResult[45] =

azResult[46] = 1200000

azResult[47] = Monterey

azResult[48] = [phone]

azResult[49] = 621

azResult[50] = Software Development

azResult[51] = 620

azResult[52] =

azResult[53] = 400000

azResult[54] = Monterey

azResult[55] = [phone]

azResult[56] = 622

azResult[57] = Quality Assurance

azResult[58] = 620

azResult[59] = 9

azResult[60] = 300000

azResult[61] = Monterey

azResult[62] = [phone]

azResult[63] = 623

azResult[64] = Customer Support

azResult[65] = 620

azResult[66] = 15

azResult[67] = 650000

azResult[68] = Monterey

azResult[69] = [phone]

azResult[70] = 670

azResult[71] = Consumer Electronics Div.

azResult[72] = 600

azResult[73] = 107

azResult[74] = 1150000

azResult[75] = Burlington VT

azResult[76] = [phone]

azResult[77] = 671

azResult[78] = Research and Development

azResult[79] = 670

azResult[80] = 20

azResult[81] = 460000

azResult[82] = Burlington VT

azResult[83] = [phone]

azResult[84] = 672

azResult[85] = Customer Services

azResult[86] = 670

azResult[87] = 94

azResult[88] = 850000

azResult[89] = Burlington VT

azResult[90] = [phone]

azResult[91] = 130

azResult[92] = Field Office: East Coast

azResult[93] = 100

azResult[94] = 11

azResult[95] = 500000

azResult[96] = Boston

azResult[97] = [phone]

azResult[98] = 140

azResult[99] = Field Office: Canada

azResult[100] = 100

azResult[101] = 72

azResult[102] = 500000

azResult[103] = Toronto

azResult[104] = [phone]

azResult[105] = 110

azResult[106] = Pacific Rim Headquarters

azResult[107] = 100

azResult[108] = 34

azResult[109] = 600000

azResult[110] = Kuaui

azResult[111] = [phone]

azResult[112] = 115

azResult[113] = Field Office: Japan

azResult[114] = 110

azResult[115] = 118

azResult[116] = 500000

azResult[117] = Tokyo

azResult[118] = 3 5350 0901

azResult[119] = 116

azResult[120] = Field Office: Singapore

azResult[121] = 110

azResult[122] =

azResult[123] = 300000

azResult[124] = Singapore

azResult[125] = 3 55 1234

azResult[126] = 120

azResult[127] = European Headquarters

azResult[128] = 100

azResult[129] = 36

azResult[130] = 700000

azResult[131] = London

azResult[132] = 71 235-4400

azResult[133] = 121

azResult[134] = Field Office: Switzerland

azResult[135] = 120

azResult[136] = 141

azResult[137] = 500000

azResult[138] = Zurich

azResult[139] = 1 211 7767

azResult[140] = 123

azResult[141] = Field Office: France

azResult[142] = 120

azResult[143] = 134

azResult[144] = 400000

azResult[145] = Cannes

azResult[146] = 58 68 11 12

azResult[147] = 125

azResult[148] = Field Office: Italy

azResult[149] = 120

azResult[150] = 121

azResult[151] = 400000

azResult[152] = Milan

azResult[153] = 2 430 39 39

从控制输出的内容，我们可以看出的结果与表格显示一致，那说明我们的移植成功了