io_user_can_chan Struct Reference

The implementation of a user-defined CAN channel. More...

Collaboration diagram for io_user_can_chan:

Data Fields
const struct io_dev_vtbl *	dev_vptr
	A pointer to the virtual table for the I/O device interface.
const struct io_can_chan_vtbl *	chan_vptr
	A pointer to the virtual table for the CAN channel interface.
struct io_svc	svc
	The I/O service representing the channel.
io_ctx_t *	ctx
	A pointer to the I/O context with which the channel is registered.
ev_exec_t *	exec
	A pointer to the executor used to execute all I/O tasks.
int	flags
	The flags specifying which CAN bus features are enabled.
int	txtimeo
	The timeout (in milliseconds) when writing a CAN frame asynchronously.
io_user_can_chan_write_t *	func
	A pointer to the function to be invoked when a CAN frame needs to be written.
void *	arg
	The user-specific value to be passed as the second argument to func.
struct ev_task	read_task
	The task responsible for initiating read operations.
struct ev_task	write_task
	The task responsible for initiating write operations.
mtx_t	p_mtx
	The mutex protecting the receive queue producer.
cnd_t	p_cond
	The condition variable used to wake up the receive queue producer.
mtx_t	c_mtx
	The mutex protecting the receive queue consumer.
cnd_t	c_cond
	The condition variable used to wake up the receive queue consumer.
struct spscring	rxring
	The ring buffer used to control the receive queue.
struct io_user_can_frame *	rxbuf
	The receive queue.
mtx_t	mtx
	The mutex protecting the channel and the queues of pending operations.
unsigned	shutdown: 1
	A flag indicating whether the I/O service has been shut down.
unsigned	read_posted: 1
	A flag indicating whether read_task has been posted to exec.
unsigned	write_posted: 1
	A flag indicating whether write_task has been posted to exec.
struct sllist	read_queue
	The queue containing pending read operations.
struct sllist	write_queue
	The queue containing pending write operations.
struct ev_task *	current_read
	The read operation currently being executed.
struct ev_task *	current_write
	The write operation currently being executed.

Detailed Description

The implementation of a user-defined CAN channel.

Definition at line 105 of file can.c.

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The documentation for this struct was generated from the following file:

• src/io2/user/can.c