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Jason Sams20087472011-05-06 14:14:30 -07001/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_RS_FIFO_H
18#define ANDROID_RS_FIFO_H
19
20
21#include "rsUtils.h"
22
23namespace android {
24namespace renderscript {
25
26
27// A simple FIFO to be used as a producer / consumer between two
28// threads. One is writer and one is reader. The common cases
29// will not require locking. It is not threadsafe for multiple
30// readers or writers by design.
31
32class Fifo {
33protected:
34 Fifo();
35 virtual ~Fifo();
36
37public:
Jason Sams5f27d6f2012-02-07 15:32:08 -080038 bool virtual writeAsync(const void *data, size_t bytes, bool waitForSpace = true) = 0;
Jason Sams20087472011-05-06 14:14:30 -070039 void virtual writeWaitReturn(void *ret, size_t retSize) = 0;
Jason Sams5f27d6f2012-02-07 15:32:08 -080040 size_t virtual read(void *data, size_t bytes, bool doWait = true, uint64_t timeToWait = 0) = 0;
Jason Sams20087472011-05-06 14:14:30 -070041 void virtual readReturn(const void *data, size_t bytes) = 0;
42
43 void virtual flush() = 0;
44
45};
46
47}
48}
49#endif