diff options
Diffstat (limited to 'indra/llplugin/llpluginprocesschild.cpp')
| -rw-r--r-- | indra/llplugin/llpluginprocesschild.cpp | 112 |
1 files changed, 85 insertions, 27 deletions
diff --git a/indra/llplugin/llpluginprocesschild.cpp b/indra/llplugin/llpluginprocesschild.cpp index ccaf95b36d..45a86476ac 100644 --- a/indra/llplugin/llpluginprocesschild.cpp +++ b/indra/llplugin/llpluginprocesschild.cpp @@ -3,30 +3,25 @@ * @brief LLPluginProcessChild handles the child side of the external-process plugin API. * * @cond - * $LicenseInfo:firstyear=2008&license=viewergpl$ - * - * Copyright (c) 2008, Linden Research, Inc. - * + * $LicenseInfo:firstyear=2008&license=viewerlgpl$ * 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 + * 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. * - * 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 + * 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. * - * 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. + * 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 * - * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO - * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, - * COMPLETENESS OR PERFORMANCE. + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ * @endcond */ @@ -48,6 +43,8 @@ LLPluginProcessChild::LLPluginProcessChild() mSocket = LLSocket::create(gAPRPoolp, LLSocket::STREAM_TCP); mSleepTime = PLUGIN_IDLE_SECONDS; // default: send idle messages at 100Hz mCPUElapsed = 0.0f; + mBlockingRequest = false; + mBlockingResponseReceived = false; } LLPluginProcessChild::~LLPluginProcessChild() @@ -83,9 +80,14 @@ void LLPluginProcessChild::idle(void) bool idle_again; do { - if(mSocketError != APR_SUCCESS) + if(APR_STATUS_IS_EOF(mSocketError)) + { + // Plugin socket was closed. This covers both normal plugin termination and host crashes. + setState(STATE_ERROR); + } + else if(mSocketError != APR_SUCCESS) { - LL_INFOS("Plugin") << "message pipe is in error state, moving to STATE_ERROR"<< LL_ENDL; + LL_INFOS("Plugin") << "message pipe is in error state (" << mSocketError << "), moving to STATE_ERROR"<< LL_ENDL; setState(STATE_ERROR); } @@ -226,6 +228,7 @@ void LLPluginProcessChild::idle(void) void LLPluginProcessChild::sleep(F64 seconds) { + deliverQueuedMessages(); if(mMessagePipe) { mMessagePipe->pump(seconds); @@ -238,6 +241,7 @@ void LLPluginProcessChild::sleep(F64 seconds) void LLPluginProcessChild::pump(void) { + deliverQueuedMessages(); if(mMessagePipe) { mMessagePipe->pump(0.0f); @@ -309,15 +313,32 @@ void LLPluginProcessChild::receiveMessageRaw(const std::string &message) LL_DEBUGS("Plugin") << "Received from parent: " << message << LL_ENDL; + // Decode this message + LLPluginMessage parsed; + parsed.parse(message); + + if(mBlockingRequest) + { + // We're blocking the plugin waiting for a response. + + if(parsed.hasValue("blocking_response")) + { + // This is the message we've been waiting for -- fall through and send it immediately. + mBlockingResponseReceived = true; + } + else + { + // Still waiting. Queue this message and don't process it yet. + mMessageQueue.push(message); + return; + } + } + bool passMessage = true; // FIXME: how should we handle queueing here? { - // Decode this message - LLPluginMessage parsed; - parsed.parse(message); - std::string message_class = parsed.getClass(); if(message_class == LLPLUGIN_MESSAGE_CLASS_INTERNAL) { @@ -425,7 +446,13 @@ void LLPluginProcessChild::receiveMessageRaw(const std::string &message) void LLPluginProcessChild::receivePluginMessage(const std::string &message) { LL_DEBUGS("Plugin") << "Received from plugin: " << message << LL_ENDL; - + + if(mBlockingRequest) + { + // + LL_ERRS("Plugin") << "Can't send a message while already waiting on a blocking request -- aborting!" << LL_ENDL; + } + // Incoming message from the plugin instance bool passMessage = true; @@ -436,6 +463,12 @@ void LLPluginProcessChild::receivePluginMessage(const std::string &message) // Decode this message LLPluginMessage parsed; parsed.parse(message); + + if(parsed.hasValue("blocking_request")) + { + mBlockingRequest = true; + } + std::string message_class = parsed.getClass(); if(message_class == "base") { @@ -494,6 +527,19 @@ void LLPluginProcessChild::receivePluginMessage(const std::string &message) LL_DEBUGS("Plugin") << "Passing through to parent: " << message << LL_ENDL; writeMessageRaw(message); } + + while(mBlockingRequest) + { + // The plugin wants to block and wait for a response to this message. + sleep(mSleepTime); // this will pump the message pipe and process messages + + if(mBlockingResponseReceived || mSocketError != APR_SUCCESS || (mMessagePipe == NULL)) + { + // Response has been received, or we've hit an error state. Stop waiting. + mBlockingRequest = false; + mBlockingResponseReceived = false; + } + } } @@ -502,3 +548,15 @@ void LLPluginProcessChild::setState(EState state) LL_DEBUGS("Plugin") << "setting state to " << state << LL_ENDL; mState = state; }; + +void LLPluginProcessChild::deliverQueuedMessages() +{ + if(!mBlockingRequest) + { + while(!mMessageQueue.empty()) + { + receiveMessageRaw(mMessageQueue.front()); + mMessageQueue.pop(); + } + } +} |