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
|
/**
* @file lllfsthread.h
* @brief LLLFSThread base class
*
* $LicenseInfo:firstyear=2000&license=viewergpl$
*
* Copyright (c) 2000-2009, 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.
* $/LicenseInfo$
*/
#ifndef LL_LLLFSTHREAD_H
#define LL_LLLFSTHREAD_H
#include <queue>
#include <string>
#include <map>
#include <set>
#include "llapr.h"
#include "llqueuedthread.h"
//============================================================================
// Threaded Local File System
//============================================================================
class LLLFSThread : public LLQueuedThread
{
//------------------------------------------------------------------------
public:
enum operation_t {
FILE_READ,
FILE_WRITE,
FILE_RENAME,
FILE_REMOVE
};
//------------------------------------------------------------------------
public:
class Responder : public LLThreadSafeRefCount
{
protected:
~Responder();
public:
virtual void completed(S32 bytes) = 0;
};
class Request : public QueuedRequest
{
protected:
virtual ~Request(); // use deleteRequest()
public:
Request(LLLFSThread* thread,
handle_t handle, U32 priority,
operation_t op, const std::string& filename,
U8* buffer, S32 offset, S32 numbytes,
Responder* responder);
S32 getBytes()
{
return mBytes;
}
S32 getBytesRead()
{
return mBytesRead;
}
S32 getOperation()
{
return mOperation;
}
U8* getBuffer()
{
return mBuffer;
}
const std::string& getFilename()
{
return mFileName;
}
/*virtual*/ bool processRequest();
/*virtual*/ void finishRequest(bool completed);
/*virtual*/ void deleteRequest();
private:
LLLFSThread* mThread;
operation_t mOperation;
std::string mFileName;
U8* mBuffer; // dest for reads, source for writes, new UUID for rename
S32 mOffset; // offset into file, -1 = append (WRITE only)
S32 mBytes; // bytes to read from file, -1 = all
S32 mBytesRead; // bytes read from file
LLPointer<Responder> mResponder;
};
//------------------------------------------------------------------------
public:
LLLFSThread(bool threaded = TRUE);
~LLLFSThread();
// Return a Request handle
handle_t read(const std::string& filename, /* Flawfinder: ignore */
U8* buffer, S32 offset, S32 numbytes,
Responder* responder, U32 pri=0);
handle_t write(const std::string& filename,
U8* buffer, S32 offset, S32 numbytes,
Responder* responder, U32 pri=0);
// Misc
U32 priorityCounter() { return mPriorityCounter-- & PRIORITY_LOWBITS; } // Use to order IO operations
// static initializers
static void initClass(bool local_is_threaded = TRUE); // Setup sLocal
static S32 updateClass(U32 ms_elapsed);
static void cleanupClass(); // Delete sLocal
private:
U32 mPriorityCounter;
public:
static LLLFSThread* sLocal; // Default local file thread
};
//============================================================================
#endif // LL_LLLFSTHREAD_H
|
