[−][src]Trait pir_8_emu::vm::PortHandler

pub trait PortHandler: Downcast {
    fn port_count(&self) -> NonZeroU8;

    fn init(&mut self, ports: &[u8]);

    fn uninit(&mut self);

    fn handle_read(&mut self, port: u8) -> u8;

    fn handle_write(&mut self, port: u8, byte: u8);
}

A handler for any number of exclusively-allocated ports

Required methods

fn port_count(&self) -> NonZeroU8

Get the amount of ports this handler handles

fn init(&mut self, ports: &[u8])

Initialise the handler to use the specified ports

When called through Ports::install_handler(), the length of the specified port set will be equal to what was last returned by port_count()

fn uninit(&mut self)

Deinitialise the handler

Called during Ports::uninstall_handler() or during Ports' destructor

fn handle_read(&mut self, port: u8) -> u8

Handle reading the returned byte from the specified port

When called through Ports::read(), the specified port is guaranteed to have been contained within the port set specified during the init() call, which is guaranteed to have run before this

fn handle_write(&mut self, port: u8, byte: u8)

Handle writing the specified byte to the specified port

When called through Ports::write(), the specified port is guaranteed to have been contained within the port set specified during the init() call, which is guaranteed to have run before this

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Methods

impl dyn PortHandler

pub fn is<__T: PortHandler>(&self) -> bool

Returns true if the trait object wraps an object of type __T.

pub fn downcast<__T: PortHandler>(
    self: Box<Self>
) -> Result<Box<__T>, Box<Self>>

Returns a boxed object from a boxed trait object if the underlying object is of type __T. Returns the original boxed trait if it isn't.

pub fn downcast_rc<__T: PortHandler>(
    self: Rc<Self>
) -> Result<Rc<__T>, Rc<Self>>

Returns an Rc-ed object from an Rc-ed trait object if the underlying object is of type __T. Returns the original Rc-ed trait if it isn't.

pub fn downcast_ref<__T: PortHandler>(&self) -> Option<&__T>

Returns a reference to the object within the trait object if it is of type __T, or None if it isn't.

pub fn downcast_mut<__T: PortHandler>(&mut self) -> Option<&mut __T>

Returns a mutable reference to the object within the trait object if it is of type __T, or None if it isn't.

Implementors

impl PortHandler for NativePortHandler[src]

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