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fix(cli): suppress 'WSANOTINITIALIZED' error on Deno exit (#7408)

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Unblocks: #6901
This commit is contained in:
Bert Belder 2020-09-09 18:44:22 +02:00
parent a3bcdb2b69
commit 839c59b14f
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GPG key ID: 7A77887B2E2ED461
2 changed files with 22 additions and 5 deletions
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3
cli/Cargo.toml
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@ -79,8 +79,7 @@ semver-parser = "0.9.0"
uuid = { version = "0.8.1", features = ["v4"] }
[target.'cfg(windows)'.dependencies]
winapi = { version = "0.3.9", features = ["knownfolders", "objbase", "shlobj",
"winbase", "winerror", "tlhelp32"] }
winapi = { version = "0.3.9", features = ["knownfolders", "mswsock", "objbase", "shlobj", "tlhelp32", "winbase", "winerror", "winsock2"] }
fwdansi = "1.1.0"
[target.'cfg(unix)'.dependencies]

24
cli/inspector.rs
View file

@ -137,9 +137,27 @@ async fn server(
host: SocketAddr,
register_inspector_rx: UnboundedReceiver<InspectorInfo>,
) {
// TODO: `inspector_map` in an Rc<RefCell<T>> instead. This is currently not
// possible because warp requires all filters to implement Send, which should
// not be necessary because we are using a single-threaded runtime.
// When the main thread shuts down, The Rust stdlib will call `WSACleanup()`,
// which shuts down the network stack. This thread will still be
// running at that time (because it never exits), but all attempts at network
// I/O will fail with a `WSANOTINITIALIZED` error, which causes a panic.
// To prevent this from happening, Winsock is initialized another time here;
// this increases Winsock's internal reference count, so it won't shut
// itself down when the main thread calls `WSACleanup()` upon exit.
// TODO: When the last `Inspector` instance is dropped, make it signal the
// server thread so it exits cleanly, then join it with the main thread.
#[cfg(windows)]
unsafe {
use winapi::um::winsock2::{WSAStartup, WSADATA};
let mut wsa_data = MaybeUninit::<WSADATA>::zeroed();
let r = WSAStartup(0x202 /* Winsock 2.2 */, wsa_data.as_mut_ptr());
assert_eq!(r, 0);
}
// TODO: put the `inspector_map` in an `Rc<RefCell<_>>` instead. This is
// currently not possible because warp requires all filters to implement
// `Send`, which should not be necessary because we are using the
// single-threaded Tokio runtime.
let inspector_map = HashMap::<Uuid, InspectorInfo>::new();
let inspector_map = Arc::new(Mutex::new(inspector_map));