blob: d46e1afa9e192364d44d6ae81f8fadd18b6007e8 (
plain) (
blame)
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
|
/**
* Copyright (C) ARM Limited 2010-2013. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __FIFO_H__
#define __FIFO_H__
#include <semaphore.h>
class Fifo {
public:
Fifo(int singleBufferSize, int totalBufferSize, sem_t* readerSem);
~Fifo();
int numBytesFilled() const;
bool isEmpty() const;
bool isFull() const;
bool willFill(int additional) const;
char* start() const;
char* write(int length);
void release();
char* read(int *const length);
private:
int mSingleBufferSize, mWrite, mRead, mReadCommit, mRaggedEnd, mWrapThreshold;
sem_t mWaitForSpaceSem;
sem_t* mReaderSem;
char* mBuffer;
bool mEnd;
};
#endif //__FIFO_H__
|