1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/**
* @file llmessagethrottle.cpp
* @brief LLMessageThrottle class used for throttling messages.
*
* $LicenseInfo:firstyear=2004&license=viewergpl$
*
* Copyright (c) 2004-2008, 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 char* 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<const char*> (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 char* 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<const char*> (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;
}
}
|
