1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

//! Blocking serial API

/// Write half of a serial interface (blocking variant)
pub trait Write<Word = u8> {
    /// The type of error that can occur when writing
    type Error: crate::serial::Error;

    /// Writes a slice, blocking until everything has been written
    ///
    /// An implementation can choose to buffer the write, returning `Ok(())`
    /// after the complete slice has been written to a buffer, but before all
    /// words have been sent via the serial interface. To make sure that
    /// everything has been sent, call [`flush`] after this function returns.
    ///
    /// [`flush`]: #tymethod.flush
    fn write(&mut self, buffer: &[Word]) -> Result<(), Self::Error>;

    /// Block until the serial interface has sent all buffered words
    fn flush(&mut self) -> Result<(), Self::Error>;
}

impl<T: Write<Word>, Word> Write<Word> for &mut T {
    type Error = T::Error;

    fn write(&mut self, buffer: &[Word]) -> Result<(), Self::Error> {
        T::write(self, buffer)
    }

    fn flush(&mut self) -> Result<(), Self::Error> {
        T::flush(self)
    }
}