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
|
/*____________________________________________________________________________
FreeAmp - The Free MP3 Player
Portions Copyright (C) 1998 GoodNoise
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: buffer.h,v 1.1.1.1 1998/10/09 00:07:09 jdw Exp $
____________________________________________________________________________*/
//buffer.h
// the one writer many readers buffer used to communicate between PMIs, LMCs and PMOs
#ifndef _BUFFER_H_
#define _BUFFER_H_
#include "config.h"
#include "queue.h"
#include "vector.h"
#include "mutex.h"
class Buffer {
private:
class Block {
public:
char *pBlock;
int32 numBytes;
~Block();
};
class BufferReaderInfo {
// should put in a destructer here...
public:
Queue<Block *> *pUnreadBlocks;
bool isRegistered;
~BufferReaderInfo();
};
Vector<BufferReaderInfo *> *pReaders;
int32 blockSize;
int32 maxBlocks;
int32 numBlocks;
Mutex *myMutex;
void getLock();
void releaseLock();
public:
Buffer(int32 blockSize = 1024); // set blocksize
Buffer(int32, int32); // blocksize, max blocks before write block
~Buffer();
int32 registerReader(); // returns hReader
void releaseReader(int32 hReader);
int32 getBlock(int32 hReader,char **writeLocation, bool blockWhileEmpty = true); // returns num bytes actually there
void writeBlock(char *pBlock,int32 actualSize);
int32 getBlockSize();
};
#endif // _BUFFER_H_
|
