llmessagethrottle.cpp
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- /**
- * @file llmessagethrottle.cpp
- * @brief LLMessageThrottle class used for throttling messages.
- *
- * $LicenseInfo:firstyear=2004&license=viewergpl$
- *
- * Copyright (c) 2004-2010, 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://secondlifegrid.net/programs/open_source/licensing/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://secondlifegrid.net/programs/open_source/licensing/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.
- * $/LicenseInfo$
- */
- #include "linden_common.h"
- #include "llhash.h"
- #include "llmessagethrottle.h"
- #include "llframetimer.h"
- // This is used for the stl search_n function.
- #if _MSC_VER >= 1500 // VC9 has a bug in search_n
- struct eq_message_throttle_entry : public std::binary_function< LLMessageThrottleEntry, LLMessageThrottleEntry, bool >
- {
- bool operator()(const LLMessageThrottleEntry& a, const LLMessageThrottleEntry& b) const
- {
- return a.getHash() == b.getHash();
- }
- };
- #else
- bool eq_message_throttle_entry(LLMessageThrottleEntry a, LLMessageThrottleEntry b)
- { return a.getHash() == b.getHash(); }
- #endif
- const U64 SEC_TO_USEC = 1000000;
-
- // How long (in microseconds) each type of message stays in its throttle list.
- const U64 MAX_MESSAGE_AGE[MTC_EOF] =
- {
- 10 * SEC_TO_USEC, // MTC_VIEWER_ALERT
- 10 * SEC_TO_USEC // MTC_AGENT_ALERT
- };
- LLMessageThrottle::LLMessageThrottle()
- {
- }
- LLMessageThrottle::~LLMessageThrottle()
- {
- }
- void LLMessageThrottle::pruneEntries()
- {
- // Go through each message category, and prune entries older than max age.
- S32 cat;
- for (cat = 0; cat < MTC_EOF; cat++)
- {
- message_list_t* message_list = &(mMessageList[cat]);
- // Use a reverse iterator, since entries on the back will be the oldest.
- message_list_reverse_iterator_t r_iterator = message_list->rbegin();
- message_list_reverse_iterator_t r_last = message_list->rend();
- // Look for the first entry younger than the maximum age.
- F32 max_age = (F32)MAX_MESSAGE_AGE[cat];
- BOOL found = FALSE;
- while (r_iterator != r_last && !found)
- {
- if ( LLFrameTimer::getTotalTime() - (*r_iterator).getEntryTime() < max_age )
- {
- // We found a young enough entry.
- found = TRUE;
- // Did we find at least one entry to remove?
- if (r_iterator != message_list->rbegin())
- {
- // Yes, remove it.
- message_list->erase(r_iterator.base(), message_list->end());
- }
- }
- else
- {
- r_iterator++;
- }
- }
- // If we didn't find any entries young enough to keep, remove them all.
- if (!found)
- {
- message_list->clear();
- }
- }
- }
- BOOL LLMessageThrottle::addViewerAlert(const LLUUID& to, const std::string& mesg)
- {
- message_list_t* message_list = &(mMessageList[MTC_VIEWER_ALERT]);
- // Concatenate from,to,mesg into one string.
- std::ostringstream full_mesg;
- full_mesg << to << mesg;
- // Create an entry for this message.
- size_t hash = llhash(full_mesg.str().c_str());
- LLMessageThrottleEntry entry(hash, LLFrameTimer::getTotalTime());
- // Check if this message is already in the list.
- #if _MSC_VER >= 1500 // VC9 has a bug in search_n
- // SJB: This *should* work but has not been tested yet *TODO: Test!
- message_list_iterator_t found = std::find_if(message_list->begin(), message_list->end(),
- std::bind2nd(eq_message_throttle_entry(), entry));
- #else
- message_list_iterator_t found = std::search_n(message_list->begin(), message_list->end(),
- 1, entry, eq_message_throttle_entry);
- #endif
- if (found == message_list->end())
- {
- // This message was not found. Add it to the list.
- message_list->push_front(entry);
- return TRUE;
- }
- else
- {
- // This message was already in the list.
- return FALSE;
- }
- }
- BOOL LLMessageThrottle::addAgentAlert(const LLUUID& agent, const LLUUID& task, const std::string& mesg)
- {
- message_list_t* message_list = &(mMessageList[MTC_AGENT_ALERT]);
- // Concatenate from,to,mesg into one string.
- std::ostringstream full_mesg;
- full_mesg << agent << task << mesg;
- // Create an entry for this message.
- size_t hash = llhash(full_mesg.str().c_str());
- LLMessageThrottleEntry entry(hash, LLFrameTimer::getTotalTime());
- // Check if this message is already in the list.
- #if _MSC_VER >= 1500 // VC9 has a bug in search_n
- // SJB: This *should* work but has not been tested yet *TODO: Test!
- message_list_iterator_t found = std::find_if(message_list->begin(), message_list->end(),
- std::bind2nd(eq_message_throttle_entry(), entry));
- #else
- message_list_iterator_t found = std::search_n(message_list->begin(), message_list->end(),
- 1, entry, eq_message_throttle_entry);
- #endif
-
- if (found == message_list->end())
- {
- // This message was not found. Add it to the list.
- message_list->push_front(entry);
- return TRUE;
- }
- else
- {
- // This message was already in the list.
- return FALSE;
- }
- }