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52 lines
1.2 KiB
52 lines
1.2 KiB
5 months ago
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/*
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* Copyright (c) 2006-2023, 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 PIPE_H__
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#define PIPE_H__
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#include <rtdef.h>
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#include <rtconfig.h>
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#include "condvar.h"
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/**
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* Pipe Device
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*/
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struct rt_pipe_device
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{
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struct rt_device parent;
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rt_bool_t is_named;
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#ifdef RT_USING_POSIX_DEVIO
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int pipeno; /* for unamed pipe */
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#endif
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/* ring buffer in pipe device */
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struct rt_ringbuffer *fifo;
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rt_uint16_t bufsz;
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rt_wqueue_t reader_queue;
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rt_wqueue_t writer_queue;
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int writer;
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int reader;
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struct rt_condvar waitfor_parter;
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struct rt_mutex lock;
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};
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typedef struct rt_pipe_device rt_pipe_t;
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rt_pipe_t *rt_pipe_create(const char *name, int bufsz);
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rt_err_t rt_pipe_open(rt_device_t device, rt_uint16_t oflag);
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rt_ssize_t rt_pipe_read(rt_device_t device, rt_off_t pos, void *buffer, rt_size_t count);
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rt_ssize_t rt_pipe_write(rt_device_t device, rt_off_t pos, const void *buffer, rt_size_t count);
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rt_err_t rt_pipe_control(rt_device_t dev, int cmd, void *args);
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rt_err_t rt_pipe_close(rt_device_t device);
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int rt_pipe_delete(const char *name);
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#endif /* PIPE_H__ */
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