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Streams: make writable streams transferrable (#36588)

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Making writable streams transferrable, part of
https://github.com/servo/servo/issues/34676

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>
This commit is contained in:
Gregory Terzian 2025-04-18 16:33:36 +08:00 • committed by GitHub
parent 05b5268061
commit fc201927ae
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GPG key ID: B5690EEEBB952194
7 changed files with 107 additions and 34 deletions
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12
components/script/dom/bindings/structuredclone.rs
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@ -43,6 +43,7 @@ use crate::dom::globalscope::GlobalScope;
use crate::dom::messageport::MessagePort;
use crate::dom::readablestream::ReadableStream;
use crate::dom::types::DOMException;
use crate::dom::writablestream::WritableStream;
use crate::realms::{AlreadyInRealm, InRealm, enter_realm};
use crate::script_runtime::{CanGc, JSContext as SafeJSContext};
@ -61,6 +62,7 @@ pub(super) enum StructuredCloneTags {
DomPoint = 0xFFFF8005,
ReadableStream = 0xFFFF8006,
DomException = 0xFFFF8007,
WritableStream = 0xFFFF8008,
Max = 0xFFFFFFFF,
}
@ -80,6 +82,7 @@ impl From<TransferrableInterface> for StructuredCloneTags {
match v {
TransferrableInterface::MessagePort => StructuredCloneTags::MessagePort,
TransferrableInterface::ReadableStream => StructuredCloneTags::ReadableStream,
TransferrableInterface::WritableStream => StructuredCloneTags::WritableStream,
}
}
}
@ -259,6 +262,7 @@ fn receiver_for_type(
match val {
TransferrableInterface::MessagePort => receive_object::<MessagePort>,
TransferrableInterface::ReadableStream => receive_object::<ReadableStream>,
TransferrableInterface::WritableStream => receive_object::<WritableStream>,
}
}
@ -385,6 +389,7 @@ fn transfer_for_type(val: TransferrableInterface) -> TransferOperation {
match val {
TransferrableInterface::MessagePort => try_transfer::<MessagePort>,
TransferrableInterface::ReadableStream => try_transfer::<ReadableStream>,
TransferrableInterface::WritableStream => try_transfer::<WritableStream>,
}
}
@ -432,6 +437,7 @@ unsafe fn can_transfer_for_type(
match transferable {
TransferrableInterface::MessagePort => can_transfer::<MessagePort>(obj, cx),
TransferrableInterface::ReadableStream => can_transfer::<ReadableStream>(obj, cx),
TransferrableInterface::WritableStream => can_transfer::<WritableStream>(obj, cx),
}
}
@ -522,7 +528,12 @@ pub(crate) struct StructuredDataReader {
pub(crate) points: Option<HashMap<DomPointId, DomPoint>>,
/// A map of serialized exceptions.
pub(crate) exceptions: Option<HashMap<DomExceptionId, DomException>>,
/// <https://streams.spec.whatwg.org/#rs-transfer>
pub(crate) readable_streams: Option<Vec<DomRoot<ReadableStream>>>,
/// <https://streams.spec.whatwg.org/#ws-transfer>
pub(crate) writable_streams: Option<Vec<DomRoot<WritableStream>>>,
}
/// A data holder for transferred and serialized objects.
@ -619,6 +630,7 @@ pub(crate) fn read(
exceptions: data.exceptions.take(),
errors: DOMErrorRecord { message: None },
readable_streams: None,
writable_streams: None,
};
let sc_reader_ptr = &mut sc_reader as *mut _;
unsafe {