C++ LLAssetRequest::mDownCallback方法代码示例

// virtual
bool LLAssetStorage::deletePendingRequestImpl(LLAssetStorage::request_list_t* requests,
											LLAssetType::EType asset_type,
											const LLUUID& asset_id)
{
	LLAssetRequest* req = findRequest(requests, asset_type, asset_id);
	if (req)
	{
		// Remove the request from this list.
		requests->remove(req);
		S32 error = LL_ERR_TCP_TIMEOUT;
		// Run callbacks.
		if (req->mUpCallback)
		{
			req->mUpCallback(req->getUUID(), req->mUserData, error, LL_EXSTAT_REQUEST_DROPPED);
		}
		if (req->mDownCallback)
		{
			req->mDownCallback(mVFS, req->getUUID(), req->getType(), req->mUserData, error, LL_EXSTAT_REQUEST_DROPPED);
		}
		if (req->mInfoCallback)
		{
			LLAssetInfo info;
			req->mInfoCallback(&info, req->mUserData, error);
		}
		delete req;
		return true;
	}
	
	return false;
}

void LLAssetStorage::_cleanupRequests(BOOL all, S32 error)
{
	F64 mt_secs = LLMessageSystem::getMessageTimeSeconds();

	request_list_t timed_out;
	S32 rt;
	for (rt = 0; rt < RT_COUNT; rt++)
	{
		request_list_t* requests = getRequestList((ERequestType)rt);
		for (request_list_t::iterator iter = requests->begin();
			 iter != requests->end(); )
		{
			request_list_t::iterator curiter = iter++;
			LLAssetRequest* tmp = *curiter;
			// if all is true, we want to clean up everything
			// otherwise just check for timed out requests
			// EXCEPT for upload timeouts
			if (all 
				|| ((RT_DOWNLOAD == rt)
					&& LL_ASSET_STORAGE_TIMEOUT < (mt_secs - tmp->mTime)))
			{
				llwarns << "Asset " << getRequestName((ERequestType)rt) << " request "
						<< (all ? "aborted" : "timed out") << " for "
						<< tmp->getUUID() << "."
						<< LLAssetType::lookup(tmp->getType()) << llendl;

				timed_out.push_front(tmp);
				iter = requests->erase(curiter);
			}
		}
	}

	LLAssetInfo	info;
	for (request_list_t::iterator iter = timed_out.begin();
		 iter != timed_out.end();  )
	{
		request_list_t::iterator curiter = iter++;
		LLAssetRequest* tmp = *curiter;
		if (tmp->mUpCallback)
		{
			tmp->mUpCallback(tmp->getUUID(), tmp->mUserData, error, LL_EXSTAT_NONE);
		}
		if (tmp->mDownCallback)
		{
			tmp->mDownCallback(mVFS, tmp->getUUID(), tmp->getType(), tmp->mUserData, error, LL_EXSTAT_NONE);
		}
		if (tmp->mInfoCallback)
		{
			tmp->mInfoCallback(&info, tmp->mUserData, error);
		}
		delete tmp;
	}

}

void LLAssetStorage::downloadCompleteCallback(
	S32 result,
	const LLUUID& file_id,
	LLAssetType::EType file_type,
	void* user_data, LLExtStat ext_status)
{
	lldebugs << "LLAssetStorage::downloadCompleteCallback() for " << file_id
		 << "," << LLAssetType::lookup(file_type) << llendl;
	LLAssetRequest* req = (LLAssetRequest*)user_data;
	if(!req)
	{
		llwarns << "LLAssetStorage::downloadCompleteCallback called without"
			"a valid request." << llendl;
		return;
	}
	if (!gAssetStorage)
	{
		llwarns << "LLAssetStorage::downloadCompleteCallback called without any asset system, aborting!" << llendl;
		return;
	}

	// Inefficient since we're doing a find through a list that may have thousands of elements.
	// This is due for refactoring; we will probably change mPendingDownloads into a set.
	request_list_t::iterator download_iter = std::find(gAssetStorage->mPendingDownloads.begin(), 
													   gAssetStorage->mPendingDownloads.end(),
													   req);
	// If the LLAssetRequest doesn't exist in the downloads queue, then it either has already been deleted
	// by _cleanupRequests, or it's a transfer.
	if (download_iter != gAssetStorage->mPendingDownloads.end())
	{
		req->setUUID(file_id);
		req->setType(file_type);
	}

	if (LL_ERR_NOERR == result)
	{
		// we might have gotten a zero-size file
		LLVFile vfile(gAssetStorage->mVFS, req->getUUID(), req->getType());
		if (vfile.getSize() <= 0)
		{
			llwarns << "downloadCompleteCallback has non-existent or zero-size asset " << req->getUUID() << llendl;
			
			result = LL_ERR_ASSET_REQUEST_NOT_IN_DATABASE;
			vfile.remove();
		}
	}
	
	// find and callback ALL pending requests for this UUID
	// SJB: We process the callbacks in reverse order, I do not know if this is important,
	//      but I didn't want to mess with it.
	request_list_t requests;
	for (request_list_t::iterator iter = gAssetStorage->mPendingDownloads.begin();
		 iter != gAssetStorage->mPendingDownloads.end();  )
	{
		request_list_t::iterator curiter = iter++;
		LLAssetRequest* tmp = *curiter;
		if ((tmp->getUUID() == file_id) && (tmp->getType()== file_type))
		{
			requests.push_front(tmp);
			iter = gAssetStorage->mPendingDownloads.erase(curiter);
		}
	}
	for (request_list_t::iterator iter = requests.begin();
		 iter != requests.end();  )
	{
		request_list_t::iterator curiter = iter++;
		LLAssetRequest* tmp = *curiter;
		if (tmp->mDownCallback)
		{
			tmp->mDownCallback(gAssetStorage->mVFS, req->getUUID(), req->getType(), tmp->mUserData, result, ext_status);
		}
		delete tmp;
	}
}