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/// macro used to spawn a coroutine
///
/// this macro is just a convenient wrapper for [`spawn`].
/// However the supplied coroutine block is not wrapped in `unsafe` block
///
/// [`spawn`]: coroutine/fn.spawn.html
#[macro_export]
macro_rules! go {
// for free spawn
($func:expr) => {{
fn _go_check<F, T>(f: F) -> F
where
F: FnOnce() -> T + Send + 'static,
T: Send + 'static,
{
f
}
let f = _go_check($func);
unsafe { $crate::coroutine::spawn(f) }
}};
// for builder/scope spawn
($builder:expr, $func:expr) => {{
fn _go_check<F, T>(f: F) -> F
where
F: FnOnce() -> T + Send,
T: Send,
{
f
}
let f = _go_check($func);
let b = $builder;
unsafe { b.spawn(f) }
}};
// for cqueue add spawn
($cqueue:expr, $token:expr, $func:expr) => {{
fn _go_check<F, T>(f: F) -> F
where
F: FnOnce($crate::cqueue::EventSender) -> T + Send,
T: Send,
{
f
}
let f = _go_check($func);
let c = $cqueue;
let t = $token;
unsafe { c.add(t, f) }
}};
}
/// macro used to spawn a coroutine with options such as name, stack_size.
///
/// this macro is just a convenient wrapper for [`spawn`].
/// However the supplied coroutine block is not wrapped in `unsafe` block
///
/// [`spawn`]: coroutine/fn.spawn.html
#[macro_export]
macro_rules! go_with {
// for stack_size
($stack_size:expr, $func:expr) => {{
fn _go_check<F, T>(stack_size: usize, f: F) -> F
where
F: FnOnce() -> T + Send + 'static,
T: Send + 'static,
{
f
}
let f = _go_check($stack_size, $func);
let builder = $crate::coroutine::Builder::new().stack_size($stack_size);
unsafe { builder.spawn(f) }
}};
// for name and stack_size
($name: expr, $stack_size:expr, $func:expr) => {{
fn _go_check<F, T>(name: &str, stack_size: usize, f: F) -> F
where
F: FnOnce() -> T + Send + 'static,
T: Send + 'static,
{
f
}
let f = _go_check($name, $stack_size, $func);
let builder = $crate::coroutine::Builder::new()
.name($name.to_owned())
.stack_size($stack_size);
unsafe { builder.spawn(f) }
}};
}
/// macro used to create the select coroutine
/// that will run in a infinite loop, and generate
/// as many events as possible
#[macro_export]
macro_rules! cqueue_add {
($cqueue:ident, $token:expr, $name:pat = $top:expr => $bottom:expr) => {{
$crate::go!($cqueue, $token, |es| loop {
let $name = $top;
es.send(es.get_token());
$bottom
})
}};
}
/// macro used to create the select coroutine
/// that will run only once, thus generate only one event
#[macro_export]
macro_rules! cqueue_add_oneshot {
($cqueue:ident, $token:expr, $name:pat = $top:expr => $bottom:expr) => {{
$crate::go!($cqueue, $token, |es| {
let $name = $top;
es.send(es.get_token());
$bottom
})
}};
}
/// macro used to select for only one event
/// it will return the index of which event happens first
#[macro_export]
macro_rules! select {
(
$($name:pat = $top:expr => $bottom:expr),+
) => ({
use $crate::cqueue;
cqueue::scope(|cqueue| {
let mut _token = 0;
$(
$crate::cqueue_add_oneshot!(cqueue, _token, $name = $top => $bottom);
_token += 1;
)+
match cqueue.poll(None) {
Ok(ev) => return ev.token,
_ => unreachable!("select error"),
}
})
})
}
/// macro used to select in a infinite loop
/// it never returns, and will run forever
#[macro_export]
macro_rules! loop_select {
(
$($name:pat = $top:expr => $bottom:expr),+
) => ({
use $crate::cqueue;
cqueue::scope(|cqueue| {
let mut _token = 0;
$(
$crate::cqueue_add!(cqueue, _token, $name = $top => $bottom);
_token += 1;
)+
loop {
match cqueue.poll(None) {
Ok(ev) => {},
_ => unreachable!("select error"),
}
}
})
})
}
/// macro used to join all scoped sub coroutines
#[macro_export]
macro_rules! join {
(
$($body:expr),+
) => ({
use $crate::coroutine;
coroutine::scope(|s| {
$(
$crate::go!(s, || $body);
)+
})
})
}
/// A macro to create a `static` of type `LocalKey`
///
/// This macro is intentionally similar to the `thread_local!`, and creates a
/// `static` which has a `with` method to access the data on a coroutine.
///
/// The data associated with each coroutine local is per-coroutine,
/// so different coroutines will contain different values.
#[macro_export]
macro_rules! coroutine_local {
(static $NAME:ident : $t:ty = $e:expr) => {
static $NAME: $crate::LocalKey<$t> = {
fn __init() -> $t {
$e
}
fn __key() -> ::std::any::TypeId {
struct __A;
::std::any::TypeId::of::<__A>()
}
$crate::LocalKey {
__init: __init,
__key: __key,
}
};
};
}