C语言下动态库相互调用

前段时间需要完成多个模块业务，而这些模块的接口都是一样的，于是为了方便管理就把每个模块都根据接口封装成了SO库，这里就留下SO库调用样例

SO库源文件代码：

1 //TestSo.c
2 #include <stdio.h>
3 
4 int CommonInterface(char* str, unsigned int strLen)
5 {
6     //deal with ...
7     printf("%s, %d
", str, strLen);
8     return 1;
9 }

编译命令：

gcc -shared -o TestSo.so TestSo.c

使用库代码：

 1 //Main.c
 2 #include <stdio.h>
 3 #include <dlfcn.h>
 4 
 5 typedef int (*CommonInterface_Func)(char* str, unsigned int strLen);
 6 
 7 #define TEST_SO_FILE "/root/test/libtestSo.so"
 8 void* soHandle = NULL;
 9 
10 /* get dynamic library function address, returns 1 success, otherwise fail. */
11 int getCommonInterfaceFuncAddr(CommonInterface_Func* funcAddr)
12 {
13     // laod dynamic library.
14     soHandle = dlopen(TEST_SO_FILE, RTLD_LAZY);
15     if ( soHandle == NULL )
16     {
17         printf("dlopen,(%s)", dlerror());
18         return 0;
19     }    
20     // get func addr
21     *funcAddr = (CommonInterface_Func)dlsym(soHandle, "CommonInterface");
22     if ( *funcAddr == NULL )
23     {
24         printf("dlsym,(%s)", dlerror());
25         dlclose(m_soHandle);
26         return 0;
27     }
28     return 1;
29 }
30 
31 int main(int argc, char* argv[])
32 {
33     char* str = "hello so.";
34     CommonInterface_Func funcAddr = NULL;
35     int result = getCommonInterfaceFuncAddr(&funcAddr);
36 
37     if (result != 1)
38     {
39         printf("get func address fail.
");
40         return 0;
41     }
42     printf("get func address success.
");
43     result = funcAddr(str, strlen(str));
44     printf("exec func result : %d
", result);
45     
46     return 1;
47 }

编译命令：

gcc -o Main_exec Main.c -ldl

执行：./Main_exec

参考链接：http://www.cnblogs.com/leaven/archive/2010/06/11/1756294.html