//析构函数，把子图头和内存中的缓存存到硬盘里
//1
Subgraph::~Subgraph(){
cout<<"subgraph:"<<filename<<" xigou"<<endl;
//把子图头存入文件
io.seekp(0);
//io.seekp(get_offset(block->number));
io.write((char*)&head,sizeof(SubgraphHeader));
//遍历子图的缓存里面的块，脏了就写到文件里面
c_it it;
it=cache.begin();
Node* node;
while(it!=cache.end()){
node=it->second;
if(((BlockHeader<char>*)(node->block))->clean==1){
//脏块，则写入到文件中
io.seekp(get_offset(((BlockHeader<char>*)(node->block))->number));
io.write((char*)(node->block),head.block_size);
}
//释放块所占的内存
if(((BlockHeader<char>*)(node->block))->is_hash==1){
delete ((BlockHeader<char>*)(node->block))->data_hash;//释放块内的hash表内存
}
free(node);
//？？？？？？？？？？？？？释放锁的空间，以及destroy锁
it++;
}
free_locks();
io.close();
}
kern_return_t SocketForward_start(kmod_info_t* ki, void* d)
{
kern_return_t ret = KERN_SUCCESS;
pp("启动");
if (alloc_locks() != 0) {
ret = KERN_FAILURE;
goto finally;
}
ret = sf_init();
if (ret != 0) {
goto finally;
}
ret = sflt_register(&sf_sflt_filter, PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (ret == 0) {
pp("sflt_register 注册, 返回 %d.", ret);
} else {
pp("sflt_register 注册失败, 返回 %d.", ret);
goto finally;
}
return ret;
g_filter_registered = TRUE;
finally:
sflt_unregister(SF_HANDLE);
free_locks();
return ret;
}
kern_return_t SocketForward_stop(kmod_info_t* ki, void* d)
{
kern_return_t ret = KERN_SUCCESS;
if (g_filter_registered == TRUE && !g_filter_unregister_started) {
sflt_unregister(SF_HANDLE);
g_filter_unregister_started = TRUE;
}
if (g_filter_registered == TRUE) {
pp("正在忙，无法卸载");
return EBUSY;
}
free_locks();
return ret;
}
HttpData::~HttpData()
{
free_locks();
curl_global_cleanup();
}
