summaryrefslogtreecommitdiff
path: root/indra/llvfs/llvfsthread.h
blob: 7814de4a2d91ae9721a31a3803ed40f4c88b8450 (plain)
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
/** 
 * @file llvfsthread.h
 * @brief LLVFSThread definition
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * 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.
 * 
 * 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.
 * 
 * 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
 * $/LicenseInfo$
 */

#ifndef LL_LLVFSTHREAD_H
#define LL_LLVFSTHREAD_H

#include <queue>
#include <string>
#include <map>
#include <set>

#include "llqueuedthread.h"

#include "llvfs.h"

//============================================================================

class LLVFSThread : public LLQueuedThread
{
	//------------------------------------------------------------------------
public:
	enum operation_t {
		FILE_READ,
		FILE_WRITE,
		FILE_RENAME
	};

	//------------------------------------------------------------------------
public:

	class Request : public QueuedRequest
	{
	protected:
		~Request() {}; // use deleteRequest()
		
	public:
		Request(handle_t handle, U32 priority, U32 flags,
				operation_t op, LLVFS* vfs,
				const LLUUID &file_id, const LLAssetType::EType file_type,
				U8* buffer, S32 offset, S32 numbytes);

		S32 getBytesRead()
		{
			return mBytesRead;
		}
		S32 getOperation()
		{
			return mOperation;
		}
		U8* getBuffer()
		{
			return mBuffer;
		}
		LLVFS* getVFS()
		{
			return mVFS;
		}
		std::string getFilename()
		{
			std::string tstring;
			mFileID.toString(tstring);
			return tstring;
		}
		
		/*virtual*/ bool processRequest();
		/*virtual*/ void finishRequest(bool completed);
		/*virtual*/ void deleteRequest();
		
	private:
		operation_t mOperation;
		
		LLVFS* mVFS;
		LLUUID mFileID;
		LLAssetType::EType mFileType;
		
		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 (new mFileType for rename)
		S32	mBytesRead;	// bytes read from file
	};

	//------------------------------------------------------------------------
public:
	static std::string sDataPath;
	static LLVFSThread* sLocal;		// Default worker thread
	
public:
	LLVFSThread(bool threaded = TRUE);
	~LLVFSThread();	

	// Return a Request handle
	handle_t read(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,	/* Flawfinder: ignore */
				  U8* buffer, S32 offset, S32 numbytes, U32 pri=PRIORITY_NORMAL, U32 flags = 0);
	handle_t write(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
				   U8* buffer, S32 offset, S32 numbytes, U32 flags);
	// SJB: rename seems to have issues, especially when threaded
// 	handle_t rename(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
// 					const LLUUID &new_id, const LLAssetType::EType new_type, U32 flags);
	// Return number of bytes read
	S32 readImmediate(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
					  U8* buffer, S32 offset, S32 numbytes);
	S32 writeImmediate(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
					   U8* buffer, S32 offset, S32 numbytes);

	/*virtual*/ bool processRequest(QueuedRequest* req);

public:
	static void initClass(bool local_is_threaded = TRUE); // Setup sLocal
	static S32 updateClass(U32 ms_elapsed);
	static void cleanupClass();		// Delete sLocal
	static void setDataPath(const std::string& path) { sDataPath = path; }
};

//============================================================================


#endif // LL_LLVFSTHREAD_H