mirror of
https://github.com/RIOT-OS/RIOT.git
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107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/*
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* Copyright (C) 2022 Gunar Schorcht
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*
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* FreeRTOS to RIOT-OS adaption module for source code compatibility
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*/
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#include <assert.h>
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#include <stdlib.h>
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#include "irq_arch.h"
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#include "ringbuffer.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/ringbuf.h"
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#define ENABLE_DEBUG 0
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#include "debug.h"
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typedef struct {
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ringbuffer_t rbuf;
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uint16_t item_size;
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char *buf;
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} rbuf_handle_t;
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RingbufHandle_t xRingbufferCreate(size_t xBufferSize, RingbufferType_t xBufferType)
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{
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/* only byte and no split buffers are supported for now */
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assert((xBufferType == RINGBUF_TYPE_BYTEBUF) ||
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(xBufferType == RINGBUF_TYPE_NOSPLIT));
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/* allocate the space for rbuf_handle_t including the buffer */
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rbuf_handle_t *handle = malloc(xBufferSize + sizeof(uint16_t) + sizeof(ringbuffer_t));
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if (handle == NULL) {
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return NULL;
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}
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handle->item_size = 0;
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handle->buf = NULL;
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ringbuffer_init((ringbuffer_t *)handle, handle->buf, xBufferSize);
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return handle;
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}
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void vRingbufferDelete(RingbufHandle_t xRingbuffer)
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{
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assert(xRingbuffer != NULL);
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free(xRingbuffer);
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}
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void *xRingbufferReceiveUpToFromISR(RingbufHandle_t xRingbuffer,
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size_t *pxItemSize, size_t xMaxSize)
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{
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rbuf_handle_t *handle = xRingbuffer;
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size_t data_len = 0;
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assert(handle != NULL);
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/* determine the number of bytes to be read */
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if (handle->rbuf.avail) {
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data_len = ((xMaxSize == 0) || (handle->rbuf.avail < xMaxSize)) ? handle->rbuf.avail
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: xMaxSize;
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}
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/* ESP-IDF ring buffers require two read operation if the data wrap around */
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if (data_len > (handle->rbuf.size - handle->rbuf.start)) {
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data_len = handle->rbuf.size - handle->rbuf.start;
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}
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handle->item_size = data_len;
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*pxItemSize = data_len;
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return handle->rbuf.buf + handle->rbuf.start;
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}
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void *xRingbufferReceiveFromISR(RingbufHandle_t xRingbuffer, size_t *pxItemSize)
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{
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return xRingbufferReceiveUpToFromISR(xRingbuffer, pxItemSize, 0);
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}
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void vRingbufferReturnItemFromISR(RingbufHandle_t xRingbuffer, void *pvItem,
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BaseType_t *pxHigherPriorityTaskWoken)
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{
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rbuf_handle_t *handle = xRingbuffer;
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if (handle->item_size) {
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ringbuffer_remove(&handle->rbuf, handle->item_size);
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}
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}
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BaseType_t xRingbufferSendFromISR(RingbufHandle_t xRingbuffer,
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const void *pvItem,
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size_t xItemSize,
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BaseType_t *pxHigherPriorityTaskWoken)
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{
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rbuf_handle_t *handle = xRingbuffer;
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assert(handle != NULL);
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/* return immediately if there is not enough space in the ring buffer */
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if (ringbuffer_get_free(&handle->rbuf) < xItemSize) {
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return pdFALSE;
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}
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/* add data to the ringbuffer */
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return ringbuffer_add(&handle->rbuf, pvItem, xItemSize) == xItemSize;
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}
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