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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
*/
#ifndef PIPE_H__
#define PIPE_H__
#include <rtdef.h>
#include <rtconfig.h>
#include "condvar.h"
/**
* Pipe Device
*/
struct rt_pipe_device
{
struct rt_device parent;
rt_bool_t is_named;
#ifdef RT_USING_POSIX_DEVIO
int pipeno; /* for unamed pipe */
#endif
/* ring buffer in pipe device */
struct rt_ringbuffer *fifo;
rt_uint16_t bufsz;
rt_wqueue_t reader_queue;
rt_wqueue_t writer_queue;
int writer;
int reader;
struct rt_condvar waitfor_parter;
struct rt_mutex lock;
};
typedef struct rt_pipe_device rt_pipe_t;
rt_pipe_t *rt_pipe_create(const char *name, int bufsz);
rt_err_t rt_pipe_open(rt_device_t device, rt_uint16_t oflag);
rt_ssize_t rt_pipe_read(rt_device_t device, rt_off_t pos, void *buffer, rt_size_t count);
rt_ssize_t rt_pipe_write(rt_device_t device, rt_off_t pos, const void *buffer, rt_size_t count);
rt_err_t rt_pipe_control(rt_device_t dev, int cmd, void *args);
rt_err_t rt_pipe_close(rt_device_t device);
int rt_pipe_delete(const char *name);
#endif /* PIPE_H__ */
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