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/**
* @file llpluginmessagepipe.h
* @brief Classes that implement connections from the plugin system to pipes/pumps.
*
* @cond
* $LicenseInfo:firstyear=2008&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
* @endcond
*/
#ifndef LL_LLPLUGINMESSAGEPIPE_H
#define LL_LLPLUGINMESSAGEPIPE_H
#include "lliosocket.h"
#include "llthread.h"
#include "llmutex.h"
class LLPluginMessagePipe;
// Inherit from this to be able to receive messages from the LLPluginMessagePipe
class LLPluginMessagePipeOwner
{
LOG_CLASS(LLPluginMessagePipeOwner);
public:
LLPluginMessagePipeOwner();
virtual ~LLPluginMessagePipeOwner();
// called with incoming messages
virtual void receiveMessageRaw(const std::string &message) = 0;
// called when the socket has an error
virtual apr_status_t socketError(apr_status_t error);
// called from LLPluginMessagePipe to manage the connection with LLPluginMessagePipeOwner -- do not use!
virtual void setMessagePipe(LLPluginMessagePipe *message_pipe);
protected:
// returns false if writeMessageRaw() would drop the message
bool canSendMessage(void);
// call this to send a message over the pipe
bool writeMessageRaw(const std::string &message);
// call this to close the pipe
void killMessagePipe(void);
LLPluginMessagePipe *mMessagePipe;
apr_status_t mSocketError;
};
class LLPluginMessagePipe
{
LOG_CLASS(LLPluginMessagePipe);
public:
LLPluginMessagePipe(LLPluginMessagePipeOwner *owner, LLSocket::ptr_t socket);
virtual ~LLPluginMessagePipe();
bool addMessage(const std::string &message);
void clearOwner(void);
bool pump(F64 timeout = 0.0f);
bool pumpOutput();
bool pumpInput(F64 timeout = 0.0f);
protected:
void processInput(void);
// used internally by pump()
void setSocketTimeout(apr_interval_time_t timeout_usec);
LLMutex mInputMutex;
std::string mInput;
LLMutex mOutputMutex;
std::string mOutput;
std::string::size_type mOutputStartIndex;
LLPluginMessagePipeOwner *mOwner;
LLSocket::ptr_t mSocket;
};
#endif // LL_LLPLUGINMESSAGE_H
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