int KSGDevice::create_handler(KSGDeviceNode*node,ACE_HANDLE* handler)
{
int ret;
ret = make_handler(node,handler);
if(ret == 0)
{
//ret = find_handler(node,&oldhandler);
//if(ret == 0)
//{
// close_handler(node,oldhandler);
//}
save_handler(node,*handler);
return 0;
}
else if(ret > 0)
{
if(node->GetParent() && node->GetParent()->GetDevice())
ret = node->GetParent()->GetDevice()->create_handler(node->GetParent(),handler);
return ret;
}
else
{
return -1;
}
}
void
gnc_table_save_cells (Table *table, gpointer save_data)
{
TableSaveHandler save_handler;
GList * cells;
GList * node;
g_return_if_fail (table);
/* ignore any changes to read-only tables */
if (gnc_table_model_read_only (table->model))
return;
// gnc_table_leave_update (table, table->current_cursor_loc);
save_handler = gnc_table_model_get_pre_save_handler (table->model);
if (save_handler)
save_handler (save_data, table->model->handler_user_data);
cells = gnc_table_layout_get_cells (table->layout);
for (node = cells; node; node = node->next)
{
BasicCell * cell = node->data;
TableSaveCellHandler save_cell_handler;
if (!cell) continue;
if (!gnc_table_layout_get_cell_changed (table->layout,
cell->cell_name, TRUE))
continue;
save_cell_handler = gnc_table_model_get_save_handler (table->model,
cell->cell_name);
if (save_cell_handler)
save_cell_handler (cell, save_data, table->model->handler_user_data);
}
save_handler = gnc_table_model_get_post_save_handler (table->model);
if (save_handler)
save_handler (save_data, table->model->handler_user_data);
}
int KSGDevice::find_handler(KSGDeviceNode* node,ACE_HANDLE* handler)
{
// 申请资源锁
int ret;
int retries = 3;
int need_wait;
ACE_HANDLE new_handle = ACE_INVALID_HANDLE;
again:
//ACE_DEBUG((LM_DEBUG,"申请连接资源"));
{
ACE_GUARD_RETURN(ACE_Recursive_Thread_Mutex,mon,_handle_mutex,1);
ret = -1;
need_wait = 0;
// 从连接表中查找
DeviceHandleMap::iterator i = _handlers.find(node);
if(i != _handlers.end())
{
// 如果有连接可用, 将连接从[连接表]中移到[已使用连接表]中
*handler = i->second;
_handlers.erase(i);
_used_handlers.insert(DeviceHandleMap::value_type(node,*handler));
//ACE_DEBUG((LM_DEBUG,"获取连接资源"));
return 0;
}
else
{
i = _used_handlers.find(node);
// 如果在[已使用连接表]中找到连接
if(i != _used_handlers.end())
{
need_wait = 1;
}
//ACE_DEBUG((LM_ERROR,"无法找到 CCU 连接"));
}
}
if(need_wait)
{
ACE_DEBUG((LM_DEBUG,"等待连接资源..."));
// 等待其它线程释放资源
if(wait_for_handler(node,handler)==0)
{
ACE_DEBUG((LM_DEBUG,"重新申请连接资源"));
if(--retries > 0)
goto again;
return -1;
}
else
{
// 等待失败
return 1;
}
}
ret = make_handler(node,&new_handle);
if(ret>0)
{
// 本设备节点不能创建连接,查找父设备
//ACE_DEBUG((LM_DEBUG,"查找父设备连接"));
if(node->GetParent() && node->GetParent()->GetDevice())
{
ret = node->GetParent()->GetDevice()->find_handler(node->GetParent(),handler);
}
else
ret = -1;
}
else if(ret == 0)
{
// 创建新连接成功,重新获取连接
ACE_DEBUG((LM_DEBUG,"建立新连接..."));
save_handler(node,new_handle);
node->connect_once(1);
goto again;
}
else
{
// 创建连接失败
ACE_DEBUG((LM_ERROR,"无法连接到设备!!![%d]",node->GetDevId()));
node->connect_once(0);
ret = -1;
}
return ret;
}