Struct DataMessage

pub struct DataMessage {
    pub tag: Option<i64>,
    pub read_ptr: usize,
    pub buffer: Vec<u8>,
    pub resources: Vec<Option<Arc<Resource>>>,
}

A variant of a Message that has a buffer of data and resources attached to it.

It implements the Read and Write traits.

Fields

tag: Option<i64>

read_ptr: usize

buffer: Vec<u8>

resources: Vec<Option<Arc<Resource>>>

Implementations

impl DataMessage

pub fn new(tag: Option<i64>, buffer_capacity: usize) -> Self

Create a new message.

pub fn new_from_vec(tag: Option<i64>, buffer: Vec<u8>) -> Self

Create a new message from a vec.

pub fn add_resource(&mut self, resource: Arc<Resource>) -> usize

Adds a resource to the message and returns the index of it inside of the message.

The resource is Any and is downcasted when accessing later.

pub fn take_module<T: 'static>( &mut self, index: usize, ) -> Option<Arc<WasmtimeCompiledModule<T>>>

Takes a module from the message, but preserves the indexes of all others.

If the index is out of bound or the resource is not a module the function will return None.

pub fn take_tcp_stream(&mut self, index: usize) -> Option<Arc<TcpConnection>>

Takes a TCP stream from the message, but preserves the indexes of all others.

If the index is out of bound or the resource is not a tcp stream the function will return None.

pub fn take_udp_socket(&mut self, index: usize) -> Option<Arc<UdpSocket>>

Takes a UDP Socket from the message, but preserves the indexes of all others.

If the index is out of bound or the resource is not a tcp stream the function will return None.

pub fn take_tls_stream(&mut self, index: usize) -> Option<Arc<TlsConnection>>

Takes a TLS stream from the message, but preserves the indexes of all others.

If the index is out of bound or the resource is not a tcp stream the function will return None.

pub fn seek(&mut self, index: usize)

Moves read pointer to index.

pub fn size(&self) -> usize

Trait Implementations

impl Debug for DataMessage

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DataMessage

fn default() -> DataMessage

Returns the “default value” for a type.

impl Read for DataMessage

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Reads all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Reads all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Reads the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Reads the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>

where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

where Self: Sized,

Creates an adapter which will read at most limit bytes from it.

impl Write for DataMessage

fn write(&mut self, buf: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.