Files
adler32
aho_corasick
alga
approx
ascii
atty
backtrace
backtrace_sys
base64
bitflags
blas_src
block_buffer
block_padding
brotli2
brotli_sys
buf_redux
byte_tools
byteorder
cauchy
cblas_sys
cfg_if
chrono
chunked_transfer
colored
crc32fast
crossbeam
crossbeam_channel
crossbeam_deque
crossbeam_epoch
crossbeam_queue
crossbeam_utils
ctrlc
deflate
digest
dirs
error_chain
filetime
futures
generic_array
getrandom
gzip_header
hex
httparse
hyper
idna
itoa
language_tags
lapack_src
lapacke
lapacke_sys
lazy_static
libc
libm
linked_hash_map
log
matches
matrixmultiply
maybe_uninit
md5
memchr
memoffset
mime
mime_guess
multipart
nalgebra
base
geometry
linalg
ndarray
ndarray_linalg
net2
netlib_src
nix
num_complex
num_cpus
num_integer
num_rational
num_traits
opaque_debug
percent_encoding
phf
phf_shared
ppv_lite86
proc_macro2
quick_error
quote
rand
rand_chacha
rand_core
rand_distr
rawpointer
regex
regex_syntax
remove_dir_all
rosrust
rosrust_codegen
rosrust_msg
rouille
rustc_demangle
rustros_tf
ryu
safemem
scopeguard
serde
serde_bytes
serde_derive
serde_json
serde_xml_rs
sha1
siphasher
smallvec
syn
tempdir
term
thread_local
threadpool
time
tiny_http
traitobject
twoway
typeable
typenum
ucd_util
unicase
unicode_bidi
unicode_normalization
unicode_xid
url
utf8_ranges
void
xml
xml_rpc
yaml_rust
 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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
use {Poll, Async, Future, AsyncSink};
use sink::Sink;

/// Future for the `Sink::send` combinator, which sends a value to a sink and
/// then waits until the sink has fully flushed.
#[derive(Debug)]
#[must_use = "futures do nothing unless polled"]
pub struct Send<S: Sink> {
    sink: Option<S>,
    item: Option<S::SinkItem>,
}

pub fn new<S: Sink>(sink: S, item: S::SinkItem) -> Send<S> {
    Send {
        sink: Some(sink),
        item: Some(item),
    }
}

impl<S: Sink> Send<S> {
    /// Get a shared reference to the inner sink.
    pub fn get_ref(&self) -> &S {
        self.sink.as_ref().take().expect("Attempted Send::get_ref after completion")
    }

    /// Get a mutable reference to the inner sink.
    pub fn get_mut(&mut self) -> &mut S {
        self.sink.as_mut().take().expect("Attempted Send::get_mut after completion")
    }

    fn sink_mut(&mut self) -> &mut S {
        self.sink.as_mut().take().expect("Attempted to poll Send after completion")
    }

    fn take_sink(&mut self) -> S {
        self.sink.take().expect("Attempted to poll Send after completion")
    }
}

impl<S: Sink> Future for Send<S> {
    type Item = S;
    type Error = S::SinkError;

    fn poll(&mut self) -> Poll<S, S::SinkError> {
        if let Some(item) = self.item.take() {
            if let AsyncSink::NotReady(item) = self.sink_mut().start_send(item)? {
                self.item = Some(item);
                return Ok(Async::NotReady);
            }
        }

        // we're done sending the item, but want to block on flushing the
        // sink
        try_ready!(self.sink_mut().poll_complete());

        // now everything's emptied, so return the sink for further use
        Ok(Async::Ready(self.take_sink()))
    }
}