From 99bffc2a21ebed07fd767ad2a9a7e1aadd491ef3 Mon Sep 17 00:00:00 2001 From: Joel Challis Date: Sun, 7 Feb 2021 23:16:15 +0000 Subject: Migrate some tmk_core files to quantum (#11791) * Migrate some tmk_core files to quantum * Fix build errors --- quantum/ring_buffer.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 quantum/ring_buffer.h (limited to 'quantum/ring_buffer.h') diff --git a/quantum/ring_buffer.h b/quantum/ring_buffer.h new file mode 100644 index 0000000000..284745ca8e --- /dev/null +++ b/quantum/ring_buffer.h @@ -0,0 +1,44 @@ +#pragma once + +#include +#include +#include + +#ifndef RBUF_SIZE +# define RBUF_SIZE 32 +#endif + +static uint8_t rbuf[RBUF_SIZE]; +static uint8_t rbuf_head = 0; +static uint8_t rbuf_tail = 0; +static inline bool rbuf_enqueue(uint8_t data) { + bool ret = false; + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) { + uint8_t next = (rbuf_head + 1) % RBUF_SIZE; + if (next != rbuf_tail) { + rbuf[rbuf_head] = data; + rbuf_head = next; + ret = true; + } + } + return ret; +} +static inline uint8_t rbuf_dequeue(void) { + uint8_t val = 0; + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) { + if (rbuf_head != rbuf_tail) { + val = rbuf[rbuf_tail]; + rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE; + } + } + + return val; +} +static inline bool rbuf_has_data(void) { + bool has_data; + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) { has_data = (rbuf_head != rbuf_tail); } + return has_data; +} +static inline void rbuf_clear(void) { + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) { rbuf_head = rbuf_tail = 0; } +} -- cgit v1.2.3