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/**
* @file llpluginmessagepipe.h
* @brief Classes that implement connections from the plugin system to pipes/pumps.
*
* @cond
* $LicenseInfo:firstyear=2008&license=viewergpl$
*
* Copyright (c) 2008-2010, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlife.com/developers/opensource/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at
* http://secondlife.com/developers/opensource/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*
* @endcond
*/
#ifndef LL_LLPLUGINMESSAGEPIPE_H
#define LL_LLPLUGINMESSAGEPIPE_H
#include "lliosocket.h"
#include "llthread.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;
LLPluginMessagePipeOwner *mOwner;
LLSocket::ptr_t mSocket;
};
#endif // LL_LLPLUGINMESSAGE_H
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