mirror of
https://github.com/openharmony/drivers_framework.git
synced 2026-08-27 20:49:55 -04:00
yanghaizhou
36 lines
798 B
C
36 lines
798 B
C
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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*
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* HDF is dual licensed: you can use it either under the terms of
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* the GPL, or the BSD license, at your option.
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* See the LICENSE file in the root of this repository for complete details.
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*/
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#ifndef BUF_FIFO_H
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#define BUF_FIFO_H
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#include <stdint.h>
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#include <stdbool.h>
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struct BufferFifo {
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volatile uint32_t readPosition;
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volatile uint32_t writePosition;
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uint16_t bufSizeMask;
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uint8_t *buffer;
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};
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static inline uint16_t BufferFifoGetDataSize(struct BufferFifo *fifo)
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{
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return (fifo->writePosition - fifo->readPosition);
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}
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static inline bool IsPowerOfTwo(int num)
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{
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return (num > 0) && (num & (num - 1)) == 0;
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}
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bool BufferFifoInit(struct BufferFifo *fifo, uint8_t *buf, uint16_t bufSize);
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#endif // BUF_FIFO_H
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