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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
use crate::deno_dir;
use crate::errors::DenoResult;
use crate::flags;
use crate::global_timer::GlobalTimer;
use crate::modules::Modules;
use crate::ops;
use crate::permissions::DenoPermissions;
use crate::resources;
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;
use std::collections::HashMap;
use std::env;
use std::ops::Deref;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Arc;
use std::sync::Mutex;
use std::time::Instant;
use tokio::sync::mpsc as async_mpsc;
pub type WorkerSender = async_mpsc::Sender<Buf>;
pub type WorkerReceiver = async_mpsc::Receiver<Buf>;
pub type WorkerChannels = (WorkerSender, WorkerReceiver);
pub type UserWorkerTable = HashMap<ResourceId, Shared<Worker>>;
// AtomicU64 is currently unstable
#[derive(Default)]
pub struct Metrics {
pub ops_dispatched: AtomicUsize,
pub ops_completed: AtomicUsize,
pub bytes_sent_control: AtomicUsize,
pub bytes_sent_data: AtomicUsize,
pub bytes_received: AtomicUsize,
pub resolve_count: AtomicUsize,
}
// Wrap State so that it can implement Dispatch.
pub struct ThreadSafeState(Arc<State>);
// Isolate cannot be passed between threads but ThreadSafeState can.
// ThreadSafeState satisfies Send and Sync.
// So any state that needs to be accessed outside the main V8 thread should be
// inside ThreadSafeState.
#[cfg_attr(feature = "cargo-clippy", allow(stutter))]
pub struct State {
pub dir: deno_dir::DenoDir,
pub argv: Vec<String>,
pub permissions: DenoPermissions,
pub flags: flags::DenoFlags,
pub metrics: Metrics,
pub modules: Mutex<Modules>,
pub worker_channels: Mutex<WorkerChannels>,
pub global_timer: Mutex<GlobalTimer>,
pub workers: Mutex<UserWorkerTable>,
pub start_time: Instant,
pub resource: resources::Resource,
pub dispatch_selector: ops::OpSelector,
}
impl Clone for ThreadSafeState {
fn clone(&self) -> Self {
ThreadSafeState(self.0.clone())
}
}
impl Deref for ThreadSafeState {
type Target = Arc<State>;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl Dispatch for ThreadSafeState {
fn dispatch(
&mut self,
control: &[u8],
zero_copy: deno_buf,
) -> (bool, Box<Op>) {
ops::dispatch_all(self, control, zero_copy, self.dispatch_selector)
}
}
impl ThreadSafeState {
pub fn new(
flags: flags::DenoFlags,
argv_rest: Vec<String>,
dispatch_selector: ops::OpSelector,
) -> Self {
let custom_root = env::var("DENO_DIR").map(|s| s.into()).ok();
let (worker_in_tx, worker_in_rx) = async_mpsc::channel::<Buf>(1);
let (worker_out_tx, worker_out_rx) = async_mpsc::channel::<Buf>(1);
let internal_channels = (worker_out_tx, worker_in_rx);
let external_channels = (worker_in_tx, worker_out_rx);
let resource = resources::add_worker(external_channels);
ThreadSafeState(Arc::new(State {
dir: deno_dir::DenoDir::new(custom_root).unwrap(),
argv: argv_rest,
permissions: DenoPermissions::from_flags(&flags),
flags,
metrics: Metrics::default(),
modules: Mutex::new(Modules::new()),
worker_channels: Mutex::new(internal_channels),
global_timer: Mutex::new(GlobalTimer::new()),
workers: Mutex::new(UserWorkerTable::new()),
start_time: Instant::now(),
resource,
dispatch_selector,
}))
}
/// Read main module from argv
pub fn main_module(&self) -> Option<String> {
if self.argv.len() <= 1 {
None
} else {
let specifier = self.argv[1].clone();
let referrer = ".";
match self.dir.resolve_module_url(&specifier, referrer) {
Ok(url) => Some(url.to_string()),
Err(e) => {
debug!("Potentially swallowed error {}", e);
None
}
}
}
}
#[inline]
pub fn check_read(&self, filename: &str) -> DenoResult<()> {
self.permissions.check_read(filename)
}
#[inline]
pub fn check_write(&self, filename: &str) -> DenoResult<()> {
self.permissions.check_write(filename)
}
#[inline]
pub fn check_env(&self) -> DenoResult<()> {
self.permissions.check_env()
}
#[inline]
pub fn check_net(&self, filename: &str) -> DenoResult<()> {
self.permissions.check_net(filename)
}
#[inline]
pub fn check_run(&self) -> DenoResult<()> {
self.permissions.check_run()
}
#[cfg(test)]
pub fn mock() -> ThreadSafeState {
let argv = vec![String::from("./deno"), String::from("hello.js")];
// For debugging: argv.push_back(String::from("-D"));
let (flags, rest_argv) = flags::set_flags(argv).unwrap();
ThreadSafeState::new(flags, rest_argv, ops::op_selector_std)
}
pub fn metrics_op_dispatched(
&self,
bytes_sent_control: usize,
bytes_sent_data: usize,
) {
self.metrics.ops_dispatched.fetch_add(1, Ordering::SeqCst);
self
.metrics
.bytes_sent_control
.fetch_add(bytes_sent_control, Ordering::SeqCst);
self
.metrics
.bytes_sent_data
.fetch_add(bytes_sent_data, Ordering::SeqCst);
}
pub fn metrics_op_completed(&self, bytes_received: usize) {
self.metrics.ops_completed.fetch_add(1, Ordering::SeqCst);
self
.metrics
.bytes_received
.fetch_add(bytes_received, Ordering::SeqCst);
}
}
#[test]
fn thread_safe() {
fn f<S: Send + Sync>(_: S) {}
f(ThreadSafeState::mock());
}
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