diff options
Diffstat (limited to 'indra/llplugin/llpluginmessagepipe.cpp')
| -rw-r--r-- | indra/llplugin/llpluginmessagepipe.cpp | 156 |
1 files changed, 106 insertions, 50 deletions
diff --git a/indra/llplugin/llpluginmessagepipe.cpp b/indra/llplugin/llpluginmessagepipe.cpp index 1d7ddc5592..8d13e38ad5 100644 --- a/indra/llplugin/llpluginmessagepipe.cpp +++ b/indra/llplugin/llpluginmessagepipe.cpp @@ -3,30 +3,25 @@ * @brief Classes that implement connections from the plugin system to pipes/pumps. * * @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. * - * 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 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. * - * 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. + * 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. * - * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO - * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, - * COMPLETENESS OR PERFORMANCE. + * 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 */ @@ -96,11 +91,14 @@ void LLPluginMessagePipeOwner::killMessagePipe(void) } } -LLPluginMessagePipe::LLPluginMessagePipe(LLPluginMessagePipeOwner *owner, LLSocket::ptr_t socket) +LLPluginMessagePipe::LLPluginMessagePipe(LLPluginMessagePipeOwner *owner, LLSocket::ptr_t socket): + mInputMutex(gAPRPoolp), + mOutputMutex(gAPRPoolp), + mOwner(owner), + mSocket(socket) { - mOwner = owner; + mOwner->setMessagePipe(this); - mSocket = socket; } LLPluginMessagePipe::~LLPluginMessagePipe() @@ -114,6 +112,7 @@ LLPluginMessagePipe::~LLPluginMessagePipe() bool LLPluginMessagePipe::addMessage(const std::string &message) { // queue the message for later output + LLMutexLock lock(&mOutputMutex); mOutput += message; mOutput += MESSAGE_DELIMITER; // message separator @@ -149,6 +148,18 @@ void LLPluginMessagePipe::setSocketTimeout(apr_interval_time_t timeout_usec) bool LLPluginMessagePipe::pump(F64 timeout) { + bool result = pumpOutput(); + + if(result) + { + result = pumpInput(timeout); + } + + return result; +} + +bool LLPluginMessagePipe::pumpOutput() +{ bool result = true; if(mSocket) @@ -156,6 +167,7 @@ bool LLPluginMessagePipe::pump(F64 timeout) apr_status_t status; apr_size_t size; + LLMutexLock lock(&mOutputMutex); if(!mOutput.empty()) { // write any outgoing messages @@ -183,6 +195,17 @@ bool LLPluginMessagePipe::pump(F64 timeout) // remove the written part from the buffer and try again later. mOutput = mOutput.substr(size); } + else if(APR_STATUS_IS_EOF(status)) + { + // This is what we normally expect when a plugin exits. + llinfos << "Got EOF from plugin socket. " << llendl; + + if(mOwner) + { + mOwner->socketError(status); + } + result = false; + } else { // some other error @@ -196,6 +219,19 @@ bool LLPluginMessagePipe::pump(F64 timeout) result = false; } } + } + + return result; +} + +bool LLPluginMessagePipe::pumpInput(F64 timeout) +{ + bool result = true; + + if(mSocket) + { + apr_status_t status; + apr_size_t size; // FIXME: For some reason, the apr timeout stuff isn't working properly on windows. // Until such time as we figure out why, don't try to use the socket timeout -- just sleep here instead. @@ -216,8 +252,16 @@ bool LLPluginMessagePipe::pump(F64 timeout) char input_buf[1024]; apr_size_t request_size; - // Start out by reading one byte, so that any data received will wake us up. - request_size = 1; + if(timeout == 0.0f) + { + // If we have no timeout, start out with a full read. + request_size = sizeof(input_buf); + } + else + { + // Start out by reading one byte, so that any data received will wake us up. + request_size = 1; + } // and use the timeout so we'll sleep if no data is available. setSocketTimeout((apr_interval_time_t)(timeout * 1000000)); @@ -236,11 +280,14 @@ bool LLPluginMessagePipe::pump(F64 timeout) // LL_INFOS("Plugin") << "after apr_socket_recv, size = " << size << LL_ENDL; if(size > 0) + { + LLMutexLock lock(&mInputMutex); mInput.append(input_buf, size); + } if(status == APR_SUCCESS) { -// llinfos << "success, read " << size << llendl; + LL_DEBUGS("PluginSocket") << "success, read " << size << LL_ENDL; if(size != request_size) { @@ -250,16 +297,28 @@ bool LLPluginMessagePipe::pump(F64 timeout) } else if(APR_STATUS_IS_TIMEUP(status)) { -// llinfos << "TIMEUP, read " << size << llendl; + LL_DEBUGS("PluginSocket") << "TIMEUP, read " << size << LL_ENDL; // Timeout was hit. Since the initial read is 1 byte, this should never be a partial read. break; } else if(APR_STATUS_IS_EAGAIN(status)) { -// llinfos << "EAGAIN, read " << size << llendl; + LL_DEBUGS("PluginSocket") << "EAGAIN, read " << size << LL_ENDL; + + // Non-blocking read returned immediately. + break; + } + else if(APR_STATUS_IS_EOF(status)) + { + // This is what we normally expect when a plugin exits. + LL_INFOS("PluginSocket") << "Got EOF from plugin socket. " << LL_ENDL; - // We've been doing partial reads, and we're done now. + if(mOwner) + { + mOwner->socketError(status); + } + result = false; break; } else @@ -276,22 +335,18 @@ bool LLPluginMessagePipe::pump(F64 timeout) break; } - // Second and subsequent reads should not use the timeout - setSocketTimeout(0); - // and should try to fill the input buffer - request_size = sizeof(input_buf); + if(timeout != 0.0f) + { + // Second and subsequent reads should not use the timeout + setSocketTimeout(0); + // and should try to fill the input buffer + request_size = sizeof(input_buf); + } } processInput(); } } - - if(!result) - { - // If we got an error, we're done. - LL_INFOS("Plugin") << "Error from socket, cleaning up." << LL_ENDL; - delete this; - } return result; } @@ -299,26 +354,27 @@ bool LLPluginMessagePipe::pump(F64 timeout) void LLPluginMessagePipe::processInput(void) { // Look for input delimiter(s) in the input buffer. - int start = 0; int delim; - while((delim = mInput.find(MESSAGE_DELIMITER, start)) != std::string::npos) + mInputMutex.lock(); + while((delim = mInput.find(MESSAGE_DELIMITER)) != std::string::npos) { // Let the owner process this message if (mOwner) { - mOwner->receiveMessageRaw(mInput.substr(start, delim - start)); + // Pull the message out of the input buffer before calling receiveMessageRaw. + // It's now possible for this function to get called recursively (in the case where the plugin makes a blocking request) + // and this guarantees that the messages will get dequeued correctly. + std::string message(mInput, 0, delim); + mInput.erase(0, delim + 1); + mInputMutex.unlock(); + mOwner->receiveMessageRaw(message); + mInputMutex.lock(); } else { LL_WARNS("Plugin") << "!mOwner" << LL_ENDL; } - - start = delim + 1; } - - // Remove delivered messages from the input buffer. - if(start != 0) - mInput = mInput.substr(start); - + mInputMutex.unlock(); } |