62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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*/
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#ifndef DATAQUEUE_H__
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#define DATAQUEUE_H__
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#include <rtthread.h>
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#define RT_DATAQUEUE_EVENT_UNKNOWN 0x00
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#define RT_DATAQUEUE_EVENT_POP 0x01
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#define RT_DATAQUEUE_EVENT_PUSH 0x02
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#define RT_DATAQUEUE_EVENT_LWM 0x03
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struct rt_data_item;
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#define RT_DATAQUEUE_SIZE(dq) ((dq)->put_index - (dq)->get_index)
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#define RT_DATAQUEUE_EMPTY(dq) ((dq)->size - RT_DATAQUEUE_SIZE(dq))
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/* data queue implementation */
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struct rt_data_queue
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{
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rt_uint16_t size;
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rt_uint16_t lwm;
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rt_bool_t waiting_lwm;
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rt_uint16_t get_index;
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rt_uint16_t put_index;
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struct rt_data_item *queue;
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rt_list_t suspended_push_list;
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rt_list_t suspended_pop_list;
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/* event notify */
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void (*evt_notify)(struct rt_data_queue *queue, rt_uint32_t event);
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};
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/**
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* DataQueue for DeviceDriver
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*/
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rt_err_t rt_data_queue_init(struct rt_data_queue *queue,
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rt_uint16_t size,
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rt_uint16_t lwm,
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void (*evt_notify)(struct rt_data_queue *queue, rt_uint32_t event));
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rt_err_t rt_data_queue_push(struct rt_data_queue *queue,
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const void *data_ptr,
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rt_size_t data_size,
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rt_int32_t timeout);
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rt_err_t rt_data_queue_pop(struct rt_data_queue *queue,
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const void **data_ptr,
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rt_size_t *size,
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rt_int32_t timeout);
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rt_err_t rt_data_queue_peak(struct rt_data_queue *queue,
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const void **data_ptr,
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rt_size_t *size);
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void rt_data_queue_reset(struct rt_data_queue *queue);
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#endif
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