C++ buffer_ptr_t::append方法代码示例

//virtual 
LLIOPipe::EStatus LLPipeStringInjector::process_impl(
		const LLChannelDescriptors& channels,
		buffer_ptr_t& buffer,
		bool& eos,
		LLSD& context,
		LLPumpIO* pump)
{
	buffer->append(channels.out(), (U8*) mString.data(), mString.size());
	eos = true;
	return STATUS_DONE;
}

// virtual
LLIOPipe::EStatus LLIOSocketReader::process_impl(
	const LLChannelDescriptors& channels,
	buffer_ptr_t& buffer,
	bool& eos,
	LLSD& context,
	LLPumpIO* pump)
{
	LL_RECORD_BLOCK_TIME(FTM_PROCESS_SOCKET_READER);
	PUMP_DEBUG;
	if(!mSource) return STATUS_PRECONDITION_NOT_MET;
	if(!mInitialized)
	{
		PUMP_DEBUG;
		// Since the read will not block, it's ok to initialize and
		// attempt to read off the descriptor immediately.
		mInitialized = true;
		if(pump)
		{
			PUMP_DEBUG;
			LL_DEBUGS() << "Initializing poll descriptor for LLIOSocketReader."
					 << LL_ENDL;
			apr_pollfd_t poll_fd;
			poll_fd.p = NULL;
			poll_fd.desc_type = APR_POLL_SOCKET;
			poll_fd.reqevents = APR_POLLIN;
			poll_fd.rtnevents = 0x0;
			poll_fd.desc.s = mSource->getSocket();
			poll_fd.client_data = NULL;
			pump->setConditional(this, &poll_fd);
		}
	}
	//if(!buffer)
	//{
	//	buffer = new LLBufferArray;
	//}
	PUMP_DEBUG;
	const apr_size_t READ_BUFFER_SIZE = 1024;
	char read_buf[READ_BUFFER_SIZE]; /*Flawfinder: ignore*/
	apr_size_t len;
	apr_status_t status = APR_SUCCESS;
	do
	{
		PUMP_DEBUG;
		len = READ_BUFFER_SIZE;
		status = apr_socket_recv(mSource->getSocket(), read_buf, &len);
		buffer->append(channels.out(), (U8*)read_buf, len);
	} while((APR_SUCCESS == status) && (READ_BUFFER_SIZE == len));
	LL_DEBUGS() << "socket read status: " << status << LL_ENDL;
	LLIOPipe::EStatus rv = STATUS_OK;

	PUMP_DEBUG;
	// *FIX: Also need to check for broken pipe
	if(APR_STATUS_IS_EOF(status))
	{
		// *FIX: Should we shut down the socket read?
		if(pump)
		{
			pump->setConditional(this, NULL);
		}
		rv = STATUS_DONE;
		eos = true;
	}
	else if(APR_STATUS_IS_EAGAIN(status))
	{
/*Commented out by Aura 9-9-8 for DEV-19961.
		// everything is fine, but we can terminate this process pump.
	
		rv = STATUS_BREAK;
*/
	}
	else
	{
		if(ll_apr_warn_status(status))
		{
			rv = STATUS_ERROR;
		}
	}
	PUMP_DEBUG;
	return rv;
}

// virtual
LLIOPipe::EStatus LLSDRPCClient::process_impl(
	const LLChannelDescriptors& channels,
	buffer_ptr_t& buffer,
	bool& eos,
	LLSD& context,
	LLPumpIO* pump)
{
	PUMP_DEBUG;
	LLMemType m1(LLMemType::MTYPE_IO_SD_CLIENT);
	if((STATE_NONE == mState) || (!pump))
	{
		// You should have called the call() method already.
		return STATUS_PRECONDITION_NOT_MET;
	}
	EStatus rv = STATUS_DONE;
	switch(mState)
	{
	case STATE_READY:
	{
		PUMP_DEBUG;
//		lldebugs << "LLSDRPCClient::process_impl STATE_READY" << llendl;
		buffer->append(
			channels.out(),
			(U8*)mRequest.c_str(),
			mRequest.length());
		context[CONTEXT_DEST_URI_SD_LABEL] = mURI;
		mState = STATE_WAITING_FOR_RESPONSE;
		break;
	}
	case STATE_WAITING_FOR_RESPONSE:
	{
		PUMP_DEBUG;
		// The input channel has the sd response in it.
		//lldebugs << "LLSDRPCClient::process_impl STATE_WAITING_FOR_RESPONSE"
		//		 << llendl;
		LLBufferStream resp(channels, buffer.get());
		LLSD sd;
		LLSDSerialize::fromNotation(sd, resp, buffer->count(channels.in()));
		LLSDRPCResponse* response = (LLSDRPCResponse*)mResponse.get();
		if (!response)
		{
			mState = STATE_DONE;
			break;
		}
		response->extractResponse(sd);
		if(EPBQ_PROCESS == mQueue)
		{
			LLPumpIO::chain_t chain;
			chain.push_back(mResponse);
			pump->addChain(chain, DEFAULT_CHAIN_EXPIRY_SECS);
		}
		else
		{
			pump->respond(mResponse.get());
		}
		mState = STATE_DONE;
		break;
	}
	case STATE_DONE:
	default:
		PUMP_DEBUG;
		llinfos << "invalid state to process" << llendl;
		rv = STATUS_ERROR;
		break;
	}
	return rv;
}