菜鸟求助Linux C++高手
现在需要使用共享对象实现通过配置文件生成类对象的功能 ， 写了一些代码大家看一下======================getstr.h=============================#ifndef __GET_STR_H__#define __GET_STR_H__class Obj{ public: int b; char *a; Obj(); int c();}; #ifdef SHAREDtypedef bool (*GetStr)(char* str,int len);typedef Obj* (*GetObj)();#elseextern "C"{bool GetStr(char* str,int len);Obj* GetObj();}#endif#endif==================================================================================getstr.cpp=================================#include"string.h"#include"getstr.h"#include"stdio.h"Obj::Obj(){ a = new char[100]; b = 100; printf("indl");}int Obj::c(){ a[0] = '!'; a[1] = 0; return 20;}extern "C" { bool GetStr(char* str,int len) { if(len < 10) return false; else strcpy(str,"1234567890"); return true; } Obj* GetObj() { return new Obj(); }}bool ReadStr(char* str,int len){ if(len < 10) return false; else strcpy(str,"1234567890"); return true;}=============================================================================================================dy.cpp============================================#include"stdio.h"#include"dlfcn.h" /*share object interface file*/#define SOFILE "/home/jameschen/Documents/ShareObject/libMyShareObject.so.1.0"#define SHARED#include"getstr.h"int main(){ void *dp; char *error; GetStr getstr; GetObj getobj; puts("share object test"); dp = dlopen(SOFILE,RTLD_LAZY); if(dp==NULL) { printf("\nerror: %s\n",dlerror()); return -1; } getstr = (GetStr)dlsym(dp,"GetStr"); getobj = (GetObj)dlsym(dp,"GetObj"); error = dlerror(); if(error) { printf("\nerror: %s\n",error); return -1; } char test[11] = {0}; getstr(test,10); Obj *obj = getobj(); printf("obj.a is %s\n",obj->a); printf("obj.b is %d\n",obj->b); obj->c(); [color=#FF0000]这里报错了[/color] printf("obj.a is %s\n",obj->a); printf("obj.b is %d\n",obj->b); printf("current string: %s \n",test); dlclose(dp); return 0;}