test.cxx

《Linux程序设计权威指南》源代码

#include <stdio.h>
#include "child1.h"
#include <stdlib.h>
#include <dlfcn.h>


int main(void)
	{
	void* handle = 0;
	parent *(*helloWorld)(void) = 0;
	const char* error = 0;

	handle = dlopen("./child1.so", RTLD_LAZY);
	if (0 == handle)
	{
	error = dlerror();
	if (0 != error)
	{
	    fprintf(stderr, "arse\n");
	}

	exit (EXIT_FAILURE);
	}

	helloWorld =  (parent *(*)(void))dlsym(handle, "CreateObject");
	if (0 == helloWorld)
	{
	error = dlerror();
	if (0 != error)
	{
	    fprintf(stderr, "arse2");
	    exit (EXIT_FAILURE);
	}

	/* else not an error */
	}

	parent *arse_y = (*helloWorld)();
	arse_y->foobar();

	dlclose(handle);

	return (EXIT_SUCCESS);
	}