Files
adler
aho_corasick
async_compression
async_trait
base64
bitflags
bytes
cfg_if
chrono
crc32fast
dirs
dirs_sys
dtoa
encoding_rs
eui48
fallible_iterator
flate2
fnv
foreign_types
foreign_types_shared
form_urlencoded
futures
futures_channel
futures_core
futures_executor
futures_io
futures_macro
futures_sink
futures_task
futures_util
async_await
future
io
lock
sink
stream
task
h2
hashbrown
http
http_body
httparse
httpdate
hyper
hyper_tls
idna
indexmap
iovec
ipnet
itoa
lazy_static
libc
linked_hash_map
log
matches
memchr
mime
mime_guess
miniz_oxide
mio
native_tls
net2
num_integer
num_traits
once_cell
openssl
openssl_probe
openssl_sys
openstack
osauth
osproto
percent_encoding
pin_project
pin_project_internal
pin_project_lite
pin_utils
proc_macro2
proc_macro_hack
proc_macro_nested
quote
regex
regex_syntax
reqwest
rustc_serialize
ryu
serde
serde_derive
serde_json
serde_urlencoded
serde_yaml
slab
socket2
syn
thread_local
time
tinyvec
tokio
future
io
loom
macros
net
park
runtime
stream
sync
task
time
util
tokio_macros
tokio_tls
tokio_util
tower_service
tracing
tracing_core
tracing_futures
try_lock
unicase
unicode_bidi
unicode_normalization
unicode_xid
url
waiter
want
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
use std::fmt::{self, Debug};
use std::thread::{self, ThreadId};

/// ThreadBound is a Sync-maker and Send-maker that allows accessing a value
/// of type T only from the original thread on which the ThreadBound was
/// constructed.
pub struct ThreadBound<T> {
    value: T,
    thread_id: ThreadId,
}

unsafe impl<T> Sync for ThreadBound<T> {}

// Send bound requires Copy, as otherwise Drop could run in the wrong place.
unsafe impl<T: Copy> Send for ThreadBound<T> {}

impl<T> ThreadBound<T> {
    pub fn new(value: T) -> Self {
        ThreadBound {
            value,
            thread_id: thread::current().id(),
        }
    }

    pub fn get(&self) -> Option<&T> {
        if thread::current().id() == self.thread_id {
            Some(&self.value)
        } else {
            None
        }
    }
}

impl<T: Debug> Debug for ThreadBound<T> {
    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
        match self.get() {
            Some(value) => Debug::fmt(value, formatter),
            None => formatter.write_str("unknown"),
        }
    }
}