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Code Issues Packages 1 Wiki Activity

core: make Isolate concrete, remove Dispatch trait (#2183)

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Op dispatch is now dynamically dispatched, so slightly less efficient.
The immeasurable perf hit is a reasonable trade for the API simplicity
that is gained here.
This commit is contained in:
Ryan Dahl 2019-04-23 18:58:00 -04:00 committed by GitHub
parent 675919e915
commit d68b44b6b2
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
5 changed files with 189 additions and 193 deletions
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7
cli/state.rs
View file

@ -10,7 +10,6 @@ use crate::resources::ResourceId;
use crate::worker::Worker;
use deno::deno_buf;
use deno::Buf;
use deno::Dispatch;
use deno::Op;
use futures::future::Shared;
use std;
@ -74,9 +73,9 @@ impl Deref for ThreadSafeState {
}
}
impl Dispatch for ThreadSafeState {
fn dispatch(
&mut self,
impl ThreadSafeState {
pub fn dispatch(
&self,
control: &[u8],
zero_copy: deno_buf,
) -> (bool, Box<Op>) {

12
cli/worker.rs
View file

@ -9,6 +9,7 @@ use crate::msg;
use crate::state::ThreadSafeState;
use crate::tokio_util;
use deno;
use deno::Config;
use deno::JSError;
use deno::Loader;
use deno::StartupData;
@ -21,7 +22,7 @@ use url::Url;
/// Wraps deno::Isolate to provide source maps, ops for the CLI, and
/// high-level module loading
pub struct Worker {
inner: deno::Isolate<ThreadSafeState>,
inner: deno::Isolate,
pub modules: deno::Modules,
pub state: ThreadSafeState,
}
@ -33,8 +34,12 @@ impl Worker {
state: ThreadSafeState,
) -> Worker {
let state_ = state.clone();
let mut config = Config::default();
config.dispatch(move |control_buf, zero_copy_buf| {
state_.dispatch(control_buf, zero_copy_buf)
});
Self {
inner: deno::Isolate::new(startup_data, state_),
inner: deno::Isolate::new(startup_data, config),
modules: deno::Modules::new(),
state,
}
@ -154,7 +159,6 @@ pub fn root_specifier_to_url(
}
impl Loader for Worker {
type Dispatch = ThreadSafeState;
type Error = DenoError;
fn resolve(specifier: &str, referrer: &str) -> Result<String, Self::Error> {
@ -187,7 +191,7 @@ impl Loader for Worker {
fn isolate_and_modules<'a: 'b + 'c, 'b, 'c>(
&'a mut self,
) -> (&'b mut deno::Isolate<Self::Dispatch>, &'c mut deno::Modules) {
) -> (&'b mut deno::Isolate, &'c mut deno::Modules) {
(&mut self.inner, &mut self.modules)
}
}

14
core/examples/http_bench.rs
View file

@ -111,14 +111,7 @@ fn test_record_from() {
pub type HttpBenchOp = dyn Future<Item = i32, Error = std::io::Error> + Send;
struct HttpBench();
impl Dispatch for HttpBench {
fn dispatch(
&mut self,
control: &[u8],
zero_copy_buf: deno_buf,
) -> (bool, Box<Op>) {
fn dispatch(control: &[u8], zero_copy_buf: deno_buf) -> (bool, Box<Op>) {
let record = Record::from(control);
let is_sync = record.promise_id == 0;
let http_bench_op = match record.op_id {
@ -167,7 +160,6 @@ impl Dispatch for HttpBench {
);
(is_sync, op)
}
}
fn main() {
let main_future = lazy(move || {
@ -182,7 +174,9 @@ fn main() {
filename: "http_bench.js",
});
let isolate = deno::Isolate::new(startup_data, HttpBench());
let mut config = deno::Config::default();
config.dispatch(dispatch);
let isolate = deno::Isolate::new(startup_data, config);
isolate.then(|r| {
js_check(r);

225
core/isolate.rs
View file

@ -68,15 +68,21 @@ pub enum StartupData<'a> {
None,
}
#[derive(Default)]
pub struct Config {
dispatch: Option<Arc<Fn(&[u8], deno_buf) -> (bool, Box<Op>) + Send + Sync>>,
}
impl Config {
/// Defines the how Deno.core.dispatch() acts.
pub trait Dispatch {
/// Called whenever Deno.core.dispatch() is called in JavaScript. zero_copy_buf
/// corresponds to the second argument of Deno.core.dispatch().
fn dispatch(
&mut self,
control: &[u8],
zero_copy_buf: deno_buf,
) -> (bool, Box<Op>);
pub fn dispatch<F>(&mut self, f: F)
where
F: Fn(&[u8], deno_buf) -> (bool, Box<Op>) + Send + Sync + 'static,
{
self.dispatch = Some(Arc::new(f));
}
}
/// A single execution context of JavaScript. Corresponds roughly to the "Web
@ -87,19 +93,19 @@ pub trait Dispatch {
/// Ops are created in JavaScript by calling Deno.core.dispatch(), and in Rust
/// by implementing deno::Dispatch::dispatch. An Op corresponds exactly to a
/// Promise in JavaScript.
pub struct Isolate<B: Dispatch> {
pub struct Isolate {
libdeno_isolate: *const libdeno::isolate,
shared_libdeno_isolate: Arc<Mutex<Option<*const libdeno::isolate>>>,
dispatcher: B,
config: Config,
needs_init: bool,
shared: SharedQueue,
pending_ops: FuturesUnordered<PendingOp>,
have_unpolled_ops: bool,
}
unsafe impl<B: Dispatch> Send for Isolate<B> {}
unsafe impl Send for Isolate {}
impl<B: Dispatch> Drop for Isolate<B> {
impl Drop for Isolate {
fn drop(&mut self) {
// remove shared_libdeno_isolate reference
*self.shared_libdeno_isolate.lock().unwrap() = None;
@ -110,10 +116,12 @@ impl<B: Dispatch> Drop for Isolate<B> {
static DENO_INIT: Once = ONCE_INIT;
impl<B: Dispatch> Isolate<B> {
impl Isolate {
/// startup_data defines the snapshot or script used at startup to initalize
/// the isolate.
pub fn new(startup_data: StartupData, dispatcher: B) -> Self {
// TODO(ry) move startup_data into Config. Ideally without introducing a
// generic lifetime into the Isolate struct...
pub fn new(startup_data: StartupData, config: Config) -> Self {
DENO_INIT.call_once(|| {
unsafe { libdeno::deno_init() };
});
@ -127,7 +135,7 @@ impl<B: Dispatch> Isolate<B> {
StartupData::Script(d) => (None, Some(d)),
StartupData::None => (None, None),
};
let config = libdeno::deno_config {
let libdeno_config = libdeno::deno_config {
will_snapshot: 0,
load_snapshot: match startup_snapshot {
Some(s) => Snapshot2::from(s),
@ -136,12 +144,12 @@ impl<B: Dispatch> Isolate<B> {
shared: shared.as_deno_buf(),
recv_cb: Self::pre_dispatch,
};
let libdeno_isolate = unsafe { libdeno::deno_new(config) };
let libdeno_isolate = unsafe { libdeno::deno_new(libdeno_config) };
let mut core_isolate = Self {
libdeno_isolate,
shared_libdeno_isolate: Arc::new(Mutex::new(Some(libdeno_isolate))),
dispatcher,
config,
shared,
needs_init,
pending_ops: FuturesUnordered::new(),
@ -178,19 +186,25 @@ impl<B: Dispatch> Isolate<B> {
control_argv0: deno_buf,
zero_copy_buf: deno_buf,
) {
let isolate = unsafe { Isolate::<B>::from_raw_ptr(user_data) };
let isolate = unsafe { Isolate::from_raw_ptr(user_data) };
let zero_copy_id = zero_copy_buf.zero_copy_id;
let control_shared = isolate.shared.shift();
let (is_sync, op) = if control_argv0.len() > 0 {
// The user called Deno.core.send(control)
isolate
.dispatcher
.dispatch(control_argv0.as_ref(), zero_copy_buf)
if let Some(ref f) = isolate.config.dispatch {
f(control_argv0.as_ref(), zero_copy_buf)
} else {
panic!("isolate.config.dispatch not set")
}
} else if let Some(c) = control_shared {
// The user called Deno.sharedQueue.push(control)
isolate.dispatcher.dispatch(&c, zero_copy_buf)
if let Some(ref f) = isolate.config.dispatch {
f(&c, zero_copy_buf)
} else {
panic!("isolate.config.dispatch not set")
}
} else {
// The sharedQueue is empty. The shouldn't happen usually, but it's also
// not technically a failure.
@ -362,7 +376,7 @@ impl<'a> ResolveContext<'a> {
}
}
impl<B: Dispatch> Isolate<B> {
impl Isolate {
pub fn mod_instantiate(
&mut self,
id: deno_mod,
@ -428,7 +442,7 @@ impl Drop for LockerScope {
}
}
impl<B: Dispatch> Future for Isolate<B> {
impl Future for Isolate {
type Item = ();
type Error = JSError;
@ -554,7 +568,7 @@ pub mod tests {
)
}
pub enum TestDispatchMode {
pub enum Mode {
AsyncImmediate,
OverflowReqSync,
OverflowResSync,
@ -562,20 +576,54 @@ pub mod tests {
OverflowResAsync,
}
pub struct TestDispatch {
pub dispatch_count: usize,
mode: TestDispatchMode,
}
pub fn setup(mode: Mode) -> (Isolate, Arc<AtomicUsize>) {
let dispatch_count = Arc::new(AtomicUsize::new(0));
let dispatch_count_ = dispatch_count.clone();
impl TestDispatch {
pub fn setup(mode: TestDispatchMode) -> Isolate<Self> {
let mut isolate = Isolate::new(
StartupData::None,
TestDispatch {
dispatch_count: 0,
mode,
let mut config = Config::default();
config.dispatch(
move |control: &[u8], _zero_copy_buf: deno_buf| -> (bool, Box<Op>) {
dispatch_count_.fetch_add(1, Ordering::Relaxed);
match mode {
Mode::AsyncImmediate => {
assert_eq!(control.len(), 1);
assert_eq!(control[0], 42);
let buf = vec![43u8].into_boxed_slice();
(false, Box::new(futures::future::ok(buf)))
}
Mode::OverflowReqSync => {
assert_eq!(control.len(), 100 * 1024 * 1024);
let buf = vec![43u8].into_boxed_slice();
(true, Box::new(futures::future::ok(buf)))
}
Mode::OverflowResSync => {
assert_eq!(control.len(), 1);
assert_eq!(control[0], 42);
let mut vec = Vec::<u8>::new();
vec.resize(100 * 1024 * 1024, 0);
vec[0] = 99;
let buf = vec.into_boxed_slice();
(true, Box::new(futures::future::ok(buf)))
}
Mode::OverflowReqAsync => {
assert_eq!(control.len(), 100 * 1024 * 1024);
let buf = vec![43u8].into_boxed_slice();
(false, Box::new(futures::future::ok(buf)))
}
Mode::OverflowResAsync => {
assert_eq!(control.len(), 1);
assert_eq!(control[0], 42);
let mut vec = Vec::<u8>::new();
vec.resize(100 * 1024 * 1024, 0);
vec[0] = 4;
let buf = vec.into_boxed_slice();
(false, Box::new(futures::future::ok(buf)))
}
}
},
);
let mut isolate = Isolate::new(StartupData::None, config);
js_check(isolate.execute(
"setup.js",
r#"
@ -586,60 +634,13 @@ pub mod tests {
}
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 0);
isolate
}
}
impl Dispatch for TestDispatch {
fn dispatch(
&mut self,
control: &[u8],
_zero_copy_buf: deno_buf,
) -> (bool, Box<Op>) {
self.dispatch_count += 1;
match self.mode {
TestDispatchMode::AsyncImmediate => {
assert_eq!(control.len(), 1);
assert_eq!(control[0], 42);
let buf = vec![43u8].into_boxed_slice();
(false, Box::new(futures::future::ok(buf)))
}
TestDispatchMode::OverflowReqSync => {
assert_eq!(control.len(), 100 * 1024 * 1024);
let buf = vec![43u8].into_boxed_slice();
(true, Box::new(futures::future::ok(buf)))
}
TestDispatchMode::OverflowResSync => {
assert_eq!(control.len(), 1);
assert_eq!(control[0], 42);
let mut vec = Vec::<u8>::new();
vec.resize(100 * 1024 * 1024, 0);
vec[0] = 99;
let buf = vec.into_boxed_slice();
(true, Box::new(futures::future::ok(buf)))
}
TestDispatchMode::OverflowReqAsync => {
assert_eq!(control.len(), 100 * 1024 * 1024);
let buf = vec![43u8].into_boxed_slice();
(false, Box::new(futures::future::ok(buf)))
}
TestDispatchMode::OverflowResAsync => {
assert_eq!(control.len(), 1);
assert_eq!(control[0], 42);
let mut vec = Vec::<u8>::new();
vec.resize(100 * 1024 * 1024, 0);
vec[0] = 4;
let buf = vec.into_boxed_slice();
(false, Box::new(futures::future::ok(buf)))
}
}
}
assert_eq!(dispatch_count.load(Ordering::Relaxed), 0);
(isolate, dispatch_count)
}
#[test]
fn test_dispatch() {
let mut isolate = TestDispatch::setup(TestDispatchMode::AsyncImmediate);
let (mut isolate, dispatch_count) = setup(Mode::AsyncImmediate);
js_check(isolate.execute(
"filename.js",
r#"
@ -651,12 +652,12 @@ pub mod tests {
main();
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 2);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 2);
}
#[test]
fn test_mods() {
let mut isolate = TestDispatch::setup(TestDispatchMode::AsyncImmediate);
let (mut isolate, dispatch_count) = setup(Mode::AsyncImmediate);
let mod_a = isolate
.mod_new(
true,
@ -668,7 +669,7 @@ pub mod tests {
Deno.core.send(control);
"#,
).unwrap();
assert_eq!(isolate.dispatcher.dispatch_count, 0);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 0);
let imports = isolate.mod_get_imports(mod_a);
assert_eq!(imports, vec!["b.js".to_string()]);
@ -689,22 +690,22 @@ pub mod tests {
};
js_check(isolate.mod_instantiate(mod_b, &mut resolve));
assert_eq!(isolate.dispatcher.dispatch_count, 0);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 0);
assert_eq!(resolve_count.load(Ordering::SeqCst), 0);
js_check(isolate.mod_instantiate(mod_a, &mut resolve));
assert_eq!(isolate.dispatcher.dispatch_count, 0);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 0);
assert_eq!(resolve_count.load(Ordering::SeqCst), 1);
js_check(isolate.mod_evaluate(mod_a));
assert_eq!(isolate.dispatcher.dispatch_count, 1);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 1);
assert_eq!(resolve_count.load(Ordering::SeqCst), 1);
}
#[test]
fn test_poll_async_immediate_ops() {
run_in_task(|| {
let mut isolate = TestDispatch::setup(TestDispatchMode::AsyncImmediate);
let (mut isolate, dispatch_count) = setup(Mode::AsyncImmediate);
js_check(isolate.execute(
"setup2.js",
@ -715,7 +716,7 @@ pub mod tests {
});
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 0);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 0);
js_check(isolate.execute(
"check1.js",
r#"
@ -725,9 +726,9 @@ pub mod tests {
assert(nrecv == 0);
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 1);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 1);
assert_eq!(Ok(Async::Ready(())), isolate.poll());
assert_eq!(isolate.dispatcher.dispatch_count, 1);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 1);
js_check(isolate.execute(
"check2.js",
r#"
@ -736,10 +737,10 @@ pub mod tests {
assert(nrecv == 1);
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 2);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 2);
assert_eq!(Ok(Async::Ready(())), isolate.poll());
js_check(isolate.execute("check3.js", "assert(nrecv == 2)"));
assert_eq!(isolate.dispatcher.dispatch_count, 2);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 2);
// We are idle, so the next poll should be the last.
assert_eq!(Ok(Async::Ready(())), isolate.poll());
});
@ -748,7 +749,7 @@ pub mod tests {
#[test]
fn test_shared() {
run_in_task(|| {
let mut isolate = TestDispatch::setup(TestDispatchMode::AsyncImmediate);
let (mut isolate, dispatch_count) = setup(Mode::AsyncImmediate);
js_check(isolate.execute(
"setup2.js",
@ -761,7 +762,7 @@ pub mod tests {
});
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 0);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 0);
js_check(isolate.execute(
"send1.js",
@ -776,7 +777,7 @@ pub mod tests {
assert(nrecv === 0);
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 2);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 2);
assert_eq!(Ok(Async::Ready(())), isolate.poll());
js_check(isolate.execute("send1.js", "assert(nrecv === 2);"));
});
@ -787,7 +788,7 @@ pub mod tests {
let (tx, rx) = std::sync::mpsc::channel::<bool>();
let tx_clone = tx.clone();
let mut isolate = TestDispatch::setup(TestDispatchMode::AsyncImmediate);
let (mut isolate, _dispatch_count) = setup(Mode::AsyncImmediate);
let shared = isolate.shared_isolate_handle();
let t1 = std::thread::spawn(move || {
@ -844,7 +845,7 @@ pub mod tests {
fn dangling_shared_isolate() {
let shared = {
// isolate is dropped at the end of this block
let mut isolate = TestDispatch::setup(TestDispatchMode::AsyncImmediate);
let (mut isolate, _dispatch_count) = setup(Mode::AsyncImmediate);
isolate.shared_isolate_handle()
};
@ -854,7 +855,7 @@ pub mod tests {
#[test]
fn overflow_req_sync() {
let mut isolate = TestDispatch::setup(TestDispatchMode::OverflowReqSync);
let (mut isolate, dispatch_count) = setup(Mode::OverflowReqSync);
js_check(isolate.execute(
"overflow_req_sync.js",
r#"
@ -869,14 +870,14 @@ pub mod tests {
assert(asyncRecv == 0);
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 1);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 1);
}
#[test]
fn overflow_res_sync() {
// TODO(ry) This test is quite slow due to memcpy-ing 100MB into JS. We
// should optimize this.
let mut isolate = TestDispatch::setup(TestDispatchMode::OverflowResSync);
let (mut isolate, dispatch_count) = setup(Mode::OverflowResSync);
js_check(isolate.execute(
"overflow_res_sync.js",
r#"
@ -891,13 +892,13 @@ pub mod tests {
assert(asyncRecv == 0);
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 1);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 1);
}
#[test]
fn overflow_req_async() {
run_in_task(|| {
let mut isolate = TestDispatch::setup(TestDispatchMode::OverflowReqAsync);
let (mut isolate, dispatch_count) = setup(Mode::OverflowReqAsync);
js_check(isolate.execute(
"overflow_req_async.js",
r#"
@ -915,7 +916,7 @@ pub mod tests {
assert(asyncRecv == 0);
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 1);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 1);
assert_eq!(Ok(Async::Ready(())), isolate.poll());
js_check(isolate.execute("check.js", "assert(asyncRecv == 1);"));
});
@ -926,7 +927,7 @@ pub mod tests {
run_in_task(|| {
// TODO(ry) This test is quite slow due to memcpy-ing 100MB into JS. We
// should optimize this.
let mut isolate = TestDispatch::setup(TestDispatchMode::OverflowResAsync);
let (mut isolate, dispatch_count) = setup(Mode::OverflowResAsync);
js_check(isolate.execute(
"overflow_res_async.js",
r#"
@ -943,7 +944,7 @@ pub mod tests {
assert(asyncRecv == 0);
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 1);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 1);
assert_eq!(Ok(()), poll_until_ready(&mut isolate, 3));
js_check(isolate.execute("check.js", "assert(asyncRecv == 1);"));
});
@ -954,7 +955,7 @@ pub mod tests {
// TODO(ry) This test is quite slow due to memcpy-ing 100MB into JS. We
// should optimize this.
run_in_task(|| {
let mut isolate = TestDispatch::setup(TestDispatchMode::OverflowResAsync);
let (mut isolate, dispatch_count) = setup(Mode::OverflowResAsync);
js_check(isolate.execute(
"overflow_res_multiple_dispatch_async.js",
r#"
@ -974,7 +975,7 @@ pub mod tests {
Deno.core.dispatch(control);
"#,
));
assert_eq!(isolate.dispatcher.dispatch_count, 2);
assert_eq!(dispatch_count.load(Ordering::Relaxed), 2);
assert_eq!(Ok(()), poll_until_ready(&mut isolate, 3));
js_check(isolate.execute("check.js", "assert(asyncRecv == 2);"));
});
@ -983,7 +984,7 @@ pub mod tests {
#[test]
fn test_js() {
run_in_task(|| {
let mut isolate = TestDispatch::setup(TestDispatchMode::AsyncImmediate);
let (mut isolate, _dispatch_count) = setup(Mode::AsyncImmediate);
js_check(
isolate.execute(
"shared_queue_test.js",

12
core/modules.rs
View file

@ -35,7 +35,6 @@ pub type SourceCodeInfoFuture<E> =
dyn Future<Item = SourceCodeInfo, Error = E> + Send;
pub trait Loader {
type Dispatch: crate::isolate::Dispatch;
type Error: std::error::Error + 'static;
/// Returns an absolute URL.
@ -49,9 +48,9 @@ pub trait Loader {
fn isolate_and_modules<'a: 'b + 'c, 'b, 'c>(
&'a mut self,
) -> (&'b mut Isolate<Self::Dispatch>, &'c mut Modules);
) -> (&'b mut Isolate, &'c mut Modules);
fn isolate<'a: 'b, 'b>(&'a mut self) -> &'b mut Isolate<Self::Dispatch> {
fn isolate<'a: 'b, 'b>(&'a mut self) -> &'b mut Isolate {
let (isolate, _) = self.isolate_and_modules();
isolate
}
@ -536,14 +535,14 @@ mod tests {
struct MockLoader {
pub loads: Vec<String>,
pub isolate: Isolate<TestDispatch>,
pub isolate: Isolate,
pub modules: Modules,
}
impl MockLoader {
fn new() -> Self {
let modules = Modules::new();
let isolate = TestDispatch::setup(TestDispatchMode::AsyncImmediate);
let (isolate, _dispatch_count) = setup(Mode::AsyncImmediate);
Self {
loads: Vec::new(),
isolate,
@ -619,7 +618,6 @@ mod tests {
}
impl Loader for MockLoader {
type Dispatch = TestDispatch;
type Error = MockError;
fn resolve(specifier: &str, referrer: &str) -> Result<String, Self::Error> {
@ -659,7 +657,7 @@ mod tests {
fn isolate_and_modules<'a: 'b + 'c, 'b, 'c>(
&'a mut self,
) -> (&'b mut Isolate<Self::Dispatch>, &'c mut Modules) {
) -> (&'b mut Isolate, &'c mut Modules) {
(&mut self.isolate, &mut self.modules)
}
}