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remove _ff_overflowed() due to lack of use

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hathach 2023-01-07 19:00:04 +07:00
parent c29b7643a5
commit 9e551c9f5c
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1 changed files with 1 additions and 12 deletions
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src/common/tusb_fifo.c
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@ -331,17 +331,6 @@ uint16_t _ff_count(uint16_t depth, uint16_t wr_idx, uint16_t rd_idx)
}
}
// BE AWARE - THIS FUNCTION MIGHT NOT GIVE A CORRECT ANSWERE IN CASE WRITE POINTER "OVERFLOWS"
// Only one overflow is allowed for this function to work e.g. if depth = 100, you must not
// write more than 2*depth-1 items in one rush without updating write pointer. Otherwise
// write pointer wraps and you pointer states are messed up. This can only happen if you
// use DMAs, write functions do not allow such an error.
TU_ATTR_ALWAYS_INLINE static inline
bool _ff_overflowed(uint16_t depth, uint16_t wr_idx, uint16_t rd_idx)
{
return _ff_count(depth, wr_idx, rd_idx) > depth;
}
// return remaining slot in fifo
TU_ATTR_ALWAYS_INLINE static inline
uint16_t _ff_remaining(uint16_t depth, uint16_t wr_idx, uint16_t rd_idx)
@ -672,7 +661,7 @@ uint16_t tu_fifo_remaining(tu_fifo_t* f)
/******************************************************************************/
bool tu_fifo_overflowed(tu_fifo_t* f)
{
return _ff_overflowed(f->depth, f->wr_idx, f->rd_idx);
return _ff_count(f->depth, f->wr_idx, f->rd_idx) > f->depth;
}
// Only use in case tu_fifo_overflow() returned true!