Struct thrift::transport::TBufferChannel
[−]
[src]
pub struct TBufferChannel { /* fields omitted */ }
In-memory read and write channel with fixed-size read and write buffers.
On a write
bytes are written to the internal write buffer. Writes are no
longer accepted once this buffer is full. Callers must empty_write_buffer()
before subsequent writes are accepted.
You can set readable bytes in the internal read buffer by filling it with
set_readable_bytes(...)
. Callers can then read until the buffer is
depleted. No further reads are accepted until the internal read buffer is
replenished again.
Methods
impl TBufferChannel
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fn with_capacity(read_capacity: usize, write_capacity: usize) -> TBufferChannel
Constructs a new, empty TBufferChannel
with the given
read buffer capacity and write buffer capacity.
fn read_bytes(&self) -> Vec<u8>
Return a copy of the bytes held by the internal read buffer. Returns an empty vector if no readable bytes are present.
fn empty_read_buffer(&mut self)
Reset the number of readable bytes to zero.
Subsequent calls to read
will return nothing.
fn set_readable_bytes(&mut self, buf: &[u8]) -> usize
Copy bytes from the source buffer buf
into the internal read buffer,
overwriting any existing bytes. Returns the number of bytes copied,
which is min(buf.len(), internal_read_buf.len())
.
fn write_bytes(&self) -> Vec<u8>
Return a copy of the bytes held by the internal write buffer. Returns an empty vector if no bytes were written.
fn empty_write_buffer(&mut self)
Resets the internal write buffer, making it seem like no bytes were
written. Calling write_buffer
after this returns an empty vector.
fn copy_write_buffer_to_read_buffer(&mut self)
Overwrites the contents of the read buffer with the contents of the write buffer. The write buffer is emptied after this operation.
Trait Implementations
impl Debug for TBufferChannel
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impl TIoChannel for TBufferChannel
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fn split(self) -> Result<(ReadHalf<Self>, WriteHalf<Self>)> where
Self: Sized,
Self: Sized,
Split the channel into a readable half and a writable half, where the readable half implements io::Read
and the writable half implements io::Write
. Returns None
if the channel was not initialized, or if it cannot be split safely. Read more
impl Read for TBufferChannel
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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. Read more
fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>
1.0.0
Read all bytes until EOF in this source, placing them into buf
. Read more
fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
1.0.0
Read all bytes until EOF in this source, placing them into buf
. Read more
fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
1.6.0
Read the exact number of bytes required to fill buf
. Read more
fn by_ref(&mut self) -> &mut Self
1.0.0
Creates a "by reference" adaptor for this instance of Read
. Read more
fn bytes(self) -> Bytes<Self>
1.0.0
Transforms this Read
instance to an Iterator
over its bytes. Read more
fn chars(self) -> Chars<Self>
🔬 This is a nightly-only experimental API. (io
)
the semantics of a partial read/write of where errors happen is currently unclear and may change
Transforms this Read
instance to an Iterator
over char
s. Read more
fn chain<R>(self, next: R) -> Chain<Self, R> where
R: Read,
1.0.0
R: Read,
Creates an adaptor which will chain this stream with another. Read more
fn take(self, limit: u64) -> Take<Self>
1.0.0
Creates an adaptor which will read at most limit
bytes from it. Read more
impl Write for TBufferChannel
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fn write(&mut self, buf: &[u8]) -> Result<usize>
Write a buffer into this object, returning how many bytes were written. Read more
fn flush(&mut self) -> Result<()>
Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>
1.0.0
Attempts to write an entire buffer into this write. Read more
fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>
1.0.0
Writes a formatted string into this writer, returning any error encountered. Read more
fn by_ref(&mut self) -> &mut Self
1.0.0
Creates a "by reference" adaptor for this instance of Write
. Read more