【OBS】circlebuf

Circular buffer ¶

• Circular buffer ¶

A circular buffer , When data is pushed forward or backward , It will automatically increase the size as needed .

#include <util/circlebuf.h>
Circular buffer structure (struct circlebuf)
structure circlebuf
Invalid * circlebuf.data
Size _t circlebuf.size
Size _t circlebuf.start_pos
Size _t circlebuf.end_pos
Size _t circlebuf.capacity
Loop buffer inline function
Invalid circlebuf_init( struct circlebuf *cb )
Initialize a circular buffer （ Just clear the whole structure ）.

Parameters
cb - Circular buffer

Invalid circlebuf_free( struct circlebuf *cb )
Release the circular buffer .

Parameters
cb - Circular buffer

void circlebuf_reserve( struct circlebuf *cb , size_t Capacity )
Reserve a certain amount of buffer space to ensure that upsizing is minimized .

Parameters
cb - Circular buffer

Capacity – New capacity , In bytes

void circlebuf_upsize( struct circlebuf *cb , size_t size )
Set current activity （ Not just keep ） size . Any new data is zero .

Parameters
cb - Circular buffer

size – New size , With