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：

 //TestSo.c
 #include <stdio.h>

 int CommonInterface(char* str, unsigned int strLen)
 {
     //deal with ...
     printf("%s, %d\n", str, strLen);
     return ;
 }

编译命令：

gcc -shared -o TestSo.so TestSo.c

 

使用库代码：

 //Main.c
 #include <stdio.h>
 #include <dlfcn.h>

 typedef int (*CommonInterface_Func)(char* str, unsigned int strLen);

 #define TEST_SO_FILE "/root/test/libtestSo.so"
 void* soHandle = NULL;

 /* get dynamic library function address, returns 1 success, otherwise fail. */
 int getCommonInterfaceFuncAddr(CommonInterface_Func* funcAddr)
 {
     // laod dynamic library.
     soHandle = dlopen(TEST_SO_FILE, RTLD_LAZY);
     if ( soHandle == NULL )
     {
         printf("dlopen,(%s)", dlerror());
         return ;
     }
     // get func addr
     *funcAddr = (CommonInterface_Func)dlsym(soHandle, "CommonInterface");
     if ( *funcAddr == NULL )
     {
         printf("dlsym,(%s)", dlerror());
         dlclose(m_soHandle);
         return ;
     }
     return ;
 }

 int main(int argc, char* argv[])
 {
     char* str = "hello so.";
     CommonInterface_Func funcAddr = NULL;
     int result = getCommonInterfaceFuncAddr(&funcAddr);

     if (result != )
     {
         printf("get func address fail.\n");
         return ;
     }
     printf("get func address success.\n");
     result = funcAddr(str, strlen(str));
     printf("exec func result : %d\n", result);

     return ;
 }

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