C++ (Cpp) k_mem_slab_allocの例

コード例 #1

ファイル: uart_mcumgr.c プロジェクト: agatti/zephyr

static struct uart_mcumgr_rx_buf *uart_mcumgr_alloc_rx_buf(void)
{
	struct uart_mcumgr_rx_buf *rx_buf;
	void *block;
	int rc;

	rc = k_mem_slab_alloc(&uart_mcumgr_slab, &block, K_NO_WAIT);
	if (rc != 0) {
		return NULL;
	}

	rx_buf = block;
	rx_buf->length = 0;
	return rx_buf;
}

コード例 #2

ファイル: test_mslab_threadsafe.c プロジェクト: bigdinotech/zephyr

/* thread entry simply invoke the APIs*/
static void tmslab_api(void *p1, void *p2, void *p3)
{
	void *block[BLK_NUM];
	struct k_mem_slab *slab = slabs[atomic_inc(&slab_id) % SLAB_NUM];
	int i = LOOP;

	while (i--) {
		memset(block, 0, sizeof(block));

		for (int i = 0; i < BLK_NUM; i++) {
			k_mem_slab_alloc(slab, &block[i], TIMEOUT);
		}
		for (int i = 0; i < BLK_NUM; i++) {
			if (block[i]) {
				k_mem_slab_free(slab, &block[i]);
				block[i] = NULL;
			}
		}
	}

	k_sem_give(&sync_sema);
}

コード例 #3

ファイル: i2s_ll_stm32.c プロジェクト: loicpoulain/zephyr

static int rx_stream_start(struct stream *stream, struct device *dev)
{
	const struct i2s_stm32_cfg *cfg = DEV_CFG(dev);
	struct i2s_stm32_data *const dev_data = DEV_DATA(dev);
	int ret;

	ret = k_mem_slab_alloc(stream->cfg.mem_slab, &stream->mem_block,
			       K_NO_WAIT);
	if (ret < 0) {
		return ret;
	}

	if (stream->master) {
		LL_I2S_SetTransferMode(cfg->i2s, LL_I2S_MODE_MASTER_RX);
	} else {
		LL_I2S_SetTransferMode(cfg->i2s, LL_I2S_MODE_SLAVE_RX);
	}

	/* remember active RX DMA channel (used in callback) */
	active_dma_rx_channel[stream->dma_channel] = dev;

	ret = start_dma(dev_data->dev_dma, stream->dma_channel,
			&stream->dma_cfg,
			(void *)LL_SPI_DMA_GetRegAddr(cfg->i2s),
			stream->mem_block,
			stream->cfg.block_size);
	if (ret < 0) {
		LOG_ERR("Failed to start RX DMA transfer: %d", ret);
		return ret;
	}

	LL_I2S_EnableDMAReq_RX(cfg->i2s);

	LL_I2S_EnableIT_ERR(cfg->i2s);
	LL_I2S_Enable(cfg->i2s);

	return 0;
}

コード例 #4

ファイル: i2s_ll_stm32.c プロジェクト: loicpoulain/zephyr

/* This function is executed in the interrupt context */
static void dma_rx_callback(void *arg, u32_t channel, int status)
{
	struct device *dev = get_dev_from_rx_dma_channel(channel);
	const struct i2s_stm32_cfg *cfg = DEV_CFG(dev);
	struct i2s_stm32_data *const dev_data = DEV_DATA(dev);
	struct stream *stream = &dev_data->rx;
	void *mblk_tmp;
	int ret;

	if (status != 0) {
		ret = -EIO;
		stream->state = I2S_STATE_ERROR;
		goto rx_disable;
	}

	__ASSERT_NO_MSG(stream->mem_block != NULL);

	/* Stop reception if there was an error */
	if (stream->state == I2S_STATE_ERROR) {
		goto rx_disable;
	}

	mblk_tmp = stream->mem_block;

	/* Prepare to receive the next data block */
	ret = k_mem_slab_alloc(stream->cfg.mem_slab, &stream->mem_block,
			       K_NO_WAIT);
	if (ret < 0) {
		stream->state = I2S_STATE_ERROR;
		goto rx_disable;
	}

	ret = reload_dma(dev_data->dev_dma, stream->dma_channel,
			&stream->dma_cfg,
			(void *)LL_SPI_DMA_GetRegAddr(cfg->i2s),
			stream->mem_block,
			stream->cfg.block_size);
	if (ret < 0) {
		LOG_DBG("Failed to start RX DMA transfer: %d", ret);
		goto rx_disable;
	}

	/* Assure cache coherency after DMA write operation */
	DCACHE_INVALIDATE(mblk_tmp, stream->cfg.block_size);

	/* All block data received */
	ret = queue_put(&stream->mem_block_queue, mblk_tmp,
			stream->cfg.block_size);
	if (ret < 0) {
		stream->state = I2S_STATE_ERROR;
		goto rx_disable;
	}
	k_sem_give(&stream->sem);

	/* Stop reception if we were requested */
	if (stream->state == I2S_STATE_STOPPING) {
		stream->state = I2S_STATE_READY;
		goto rx_disable;
	}

	return;

rx_disable:
	rx_stream_disable(stream, dev);
}