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42 lines
1.2 KiB
42 lines
1.2 KiB
13 years ago
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/*
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* Copyright 2012 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SYNTH_RINGBUFFER_H_
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#define SYNTH_RINGBUFFER_H_
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class RingBuffer {
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public:
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RingBuffer();
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// Returns number of bytes available for reading.
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int BytesAvailable();
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// Reads bytes. It is the caller's responsibility to make sure that
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// size <= a previous value of BytesAvailable().
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int Read(int size, uint8_t *bytes);
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// Writes bytes into the buffer. If the buffer is full, the method will
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// block until space is available.
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int Write(const uint8_t *bytes, int size);
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private:
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static const int kBufSize = 8192;
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uint8_t buf_[kBufSize];
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volatile int rd_ix_;
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volatile int wr_ix_;
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};
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#endif // SYNTH_RINGBUFFER_H_
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