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/**
* @file llpluginprocesschild.h
* @brief LLPluginProcessChild handles the child side of the external-process plugin API.
*
* @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_LLPLUGINPROCESSCHILD_H
#define LL_LLPLUGINPROCESSCHILD_H
#include <queue>
#include "llpluginmessage.h"
#include "llpluginmessagepipe.h"
#include "llplugininstance.h"
#include "llhost.h"
#include "llpluginsharedmemory.h"
class LLPluginInstance;
class LLPluginProcessChild: public LLPluginMessagePipeOwner, public LLPluginInstanceMessageListener
{
LOG_CLASS(LLPluginProcessChild);
public:
LLPluginProcessChild();
~LLPluginProcessChild();
void init(U32 launcher_port);
void idle(void);
void sleep(F64 seconds);
void pump();
// returns true if the plugin is in the steady state (processing messages)
bool isRunning(void);
// returns true if the plugin is unloaded or we're in an unrecoverable error state.
bool isDone(void);
void killSockets(void);
F64 getSleepTime(void) const { return mSleepTime; };
void sendMessageToPlugin(const LLPluginMessage &message);
void sendMessageToParent(const LLPluginMessage &message);
// Inherited from LLPluginMessagePipeOwner
/* virtual */ void receiveMessageRaw(const std::string &message);
// Inherited from LLPluginInstanceMessageListener
/* virtual */ void receivePluginMessage(const std::string &message);
private:
enum EState
{
STATE_UNINITIALIZED,
STATE_INITIALIZED, // init() has been called
STATE_CONNECTED, // connected back to launcher
STATE_PLUGIN_LOADING, // plugin library needs to be loaded
STATE_PLUGIN_LOADED, // plugin library has been loaded
STATE_PLUGIN_INITIALIZING, // plugin is processing init message
STATE_RUNNING, // steady state (processing messages)
STATE_UNLOADING, // plugin has sent shutdown_response and needs to be unloaded
STATE_UNLOADED, // plugin has been unloaded
STATE_ERROR, // generic bailout state
STATE_DONE // state machine will sit in this state after either error or normal termination.
};
void setState(EState state);
EState mState;
LLHost mLauncherHost;
LLSocket::ptr_t mSocket;
std::string mPluginFile;
std::string mPluginDir;
LLPluginInstance *mInstance;
typedef std::map<std::string, LLPluginSharedMemory*> sharedMemoryRegionsType;
sharedMemoryRegionsType mSharedMemoryRegions;
LLTimer mHeartbeat;
F64 mSleepTime;
F64 mCPUElapsed;
bool mBlockingRequest;
bool mBlockingResponseReceived;
std::queue<std::string> mMessageQueue;
void deliverQueuedMessages();
};
#endif // LL_LLPLUGINPROCESSCHILD_H
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