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https://github.com/stargieg/bacnet-stack
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86 lines
1.5 KiB
C
Executable File
86 lines
1.5 KiB
C
Executable File
/**
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* @file
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* @author Steve Karg
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* @date 2004
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*/
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#ifndef FIFO_H
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#define FIFO_H
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#include <stdint.h>
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#include <stdbool.h>
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/**
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* FIFO data structure
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*
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* @{
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*/
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struct fifo_buffer_t {
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/** first byte of data */
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volatile unsigned head;
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/** last byte of data */
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volatile unsigned tail;
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/** block of memory or array of data */
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volatile uint8_t *buffer;
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/** length of the data */
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unsigned buffer_len;
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};
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typedef struct fifo_buffer_t FIFO_BUFFER;
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/** @} */
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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unsigned FIFO_Count(
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FIFO_BUFFER const *b);
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bool FIFO_Full(
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FIFO_BUFFER const *b);
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bool FIFO_Available(
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FIFO_BUFFER const *b,
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unsigned count);
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bool FIFO_Empty(
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FIFO_BUFFER const *b);
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uint8_t FIFO_Peek(
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FIFO_BUFFER const *b);
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uint8_t FIFO_Get(
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FIFO_BUFFER * b);
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unsigned FIFO_Pull(
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FIFO_BUFFER * b,
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uint8_t * data_bytes,
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unsigned length);
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bool FIFO_Put(
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FIFO_BUFFER * b,
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uint8_t data_byte);
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bool FIFO_Add(
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FIFO_BUFFER * b,
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uint8_t * data_bytes,
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unsigned count);
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void FIFO_Flush(
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FIFO_BUFFER * b);
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/* note: buffer_len must be a power of two */
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void FIFO_Init(
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FIFO_BUFFER * b,
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volatile uint8_t * buffer,
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unsigned buffer_len);
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#ifdef TEST
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#include "ctest.h"
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void testFIFOBuffer(
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Test * pTest);
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#endif
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif
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