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
|
/**
* @file llvocache.cpp
* @brief Cache of objects on the viewer.
*
* $LicenseInfo:firstyear=2003&license=viewergpl$
*
* Copyright (c) 2003-2009, 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 "llviewerprecompiledheaders.h"
#include "llvocache.h"
#include "llerror.h"
//---------------------------------------------------------------------------
// LLVOCacheEntry
//---------------------------------------------------------------------------
LLVOCacheEntry::LLVOCacheEntry(U32 local_id, U32 crc, LLDataPackerBinaryBuffer &dp)
{
mLocalID = local_id;
mCRC = crc;
mHitCount = 0;
mDupeCount = 0;
mCRCChangeCount = 0;
mBuffer = new U8[dp.getBufferSize()];
mDP.assignBuffer(mBuffer, dp.getBufferSize());
mDP = dp;
}
LLVOCacheEntry::LLVOCacheEntry()
{
mLocalID = 0;
mCRC = 0;
mHitCount = 0;
mDupeCount = 0;
mCRCChangeCount = 0;
mBuffer = NULL;
mDP.assignBuffer(mBuffer, 0);
}
static inline void checkedRead(LLFILE *fp, void *data, size_t nbytes)
{
if (fread(data, 1, nbytes, fp) != nbytes)
{
llwarns << "Short read" << llendl;
memset(data, 0, nbytes);
}
}
LLVOCacheEntry::LLVOCacheEntry(LLFILE *fp)
{
S32 size;
checkedRead(fp, &mLocalID, sizeof(U32));
checkedRead(fp, &mCRC, sizeof(U32));
checkedRead(fp, &mHitCount, sizeof(S32));
checkedRead(fp, &mDupeCount, sizeof(S32));
checkedRead(fp, &mCRCChangeCount, sizeof(S32));
checkedRead(fp, &size, sizeof(S32));
// Corruption in the cache entries
if ((size > 10000) || (size < 1))
{
// We've got a bogus size, skip reading it.
// We won't bother seeking, because the rest of this file
// is likely bogus, and will be tossed anyway.
llwarns << "Bogus cache entry, size " << size << ", aborting!" << llendl;
mLocalID = 0;
mCRC = 0;
mBuffer = NULL;
return;
}
mBuffer = new U8[size];
checkedRead(fp, mBuffer, size);
mDP.assignBuffer(mBuffer, size);
}
LLVOCacheEntry::~LLVOCacheEntry()
{
delete [] mBuffer;
}
// New CRC means the object has changed.
void LLVOCacheEntry::assignCRC(U32 crc, LLDataPackerBinaryBuffer &dp)
{
if ( (mCRC != crc)
||(mDP.getBufferSize() == 0))
{
mCRC = crc;
mHitCount = 0;
mCRCChangeCount++;
mDP.freeBuffer();
mBuffer = new U8[dp.getBufferSize()];
mDP.assignBuffer(mBuffer, dp.getBufferSize());
mDP = dp;
}
}
LLDataPackerBinaryBuffer *LLVOCacheEntry::getDP(U32 crc)
{
if ( (mCRC != crc)
||(mDP.getBufferSize() == 0))
{
//llinfos << "Not getting cache entry, invalid!" << llendl;
return NULL;
}
mHitCount++;
return &mDP;
}
void LLVOCacheEntry::recordHit()
{
mHitCount++;
}
void LLVOCacheEntry::dump() const
{
llinfos << "local " << mLocalID
<< " crc " << mCRC
<< " hits " << mHitCount
<< " dupes " << mDupeCount
<< " change " << mCRCChangeCount
<< llendl;
}
static inline void checkedWrite(LLFILE *fp, const void *data, size_t nbytes)
{
if (fwrite(data, 1, nbytes, fp) != nbytes)
{
llwarns << "Short write" << llendl;
}
}
void LLVOCacheEntry::writeToFile(LLFILE *fp) const
{
checkedWrite(fp, &mLocalID, sizeof(U32));
checkedWrite(fp, &mCRC, sizeof(U32));
checkedWrite(fp, &mHitCount, sizeof(S32));
checkedWrite(fp, &mDupeCount, sizeof(S32));
checkedWrite(fp, &mCRCChangeCount, sizeof(S32));
S32 size = mDP.getBufferSize();
checkedWrite(fp, &size, sizeof(S32));
checkedWrite(fp, mBuffer, size);
}
|
