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add TU_FIFO_INIT() to help with tu_fifo declaration

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tu_fifo_clear() also reset max_pointer_idx and non_used_index_space
This commit is contained in:
hathach
2021-02-19 11:57:56 +07:00
parent be9f86ca9e
commit 2a04ee68b8
4 changed files with 25 additions and 34 deletions
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25
src/common/tusb_fifo.h
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@@ -66,8 +66,8 @@ typedef struct
uint16_t item_size ; ///< size of each item
bool overwritable ;
uint16_t non_used_index_space ; ///< required for non-power-of-two buffer length
uint16_t max_pointer_idx ; ///< maximum absolute pointer index
uint16_t non_used_index_space ; ///< required for non-power-of-two buffer length
volatile uint16_t wr_idx ; ///< write pointer
volatile uint16_t rd_idx ; ///< read pointer
@@ -78,16 +78,19 @@ typedef struct
} tu_fifo_t;
#define TU_FIFO_DEF(_name, _depth, _type, _overwritable) \
uint8_t _name##_buf[_depth*sizeof(_type)]; \
tu_fifo_t _name = { \
.buffer = _name##_buf, \
.depth = _depth, \
.item_size = sizeof(_type), \
.overwritable = _overwritable, \
.max_pointer_idx = 2*_depth-1, \
.non_used_index_space = UINT16_MAX - (2*_depth-1), \
}
#define TU_FIFO_INIT(_buffer, _depth, _type, _overwritable) \
{ \
.buffer = _buffer, \
.depth = _depth, \
.item_size = sizeof(_type), \
.overwritable = _overwritable, \
.max_pointer_idx = 2*(_depth)-1, \
.non_used_index_space = UINT16_MAX - (2*(_depth)-1) \
}
#define TU_FIFO_DEF(_name, _depth, _type, _overwritable) \
uint8_t _name##_buf[_depth*sizeof(_type)]; \
tu_fifo_t _name = TU_FIFO_INIT(_name##_buf, _depth, _type, _overwritable)
bool tu_fifo_set_overwritable(tu_fifo_t *f, bool overwritable);
bool tu_fifo_clear(tu_fifo_t *f);