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Bug 1582348 - Implement |WritableStreamDefaultWriter.prototype.releaseLock|. r=arai

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Differential Revision: https://phabricator.services.mozilla.com/D50106

--HG--
extra : moz-landing-system : lando
This commit is contained in:
Jeff Walden 2019-11-05 05:10:27 +00:00
parent 331487beaa
commit 2befc5d656
1 changed files with 48 additions and 1 deletions
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49
js/src/builtin/streams/WritableStreamDefaultWriter.cpp
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@ -8,6 +8,7 @@
#include "builtin/streams/WritableStreamDefaultWriter-inl.h"
#include "mozilla/Assertions.h" // MOZ_ASSERT
#include "mozilla/Attributes.h" // MOZ_MUST_USE
#include "jsapi.h" // JS_ReportErrorASCII, JS_ReportErrorNumberASCII
@ -17,7 +18,7 @@
#include "builtin/streams/MiscellaneousOperations.h" // js::ReturnPromiseRejectedWithPendingError
#include "builtin/streams/WritableStream.h" // js::WritableStream
#include "builtin/streams/WritableStreamOperations.h" // js::WritableStreamCloseQueuedOrInFlight
#include "builtin/streams/WritableStreamWriterOperations.h" // js::WritableStreamDefaultWriter{GetDesiredSize,Write}
#include "builtin/streams/WritableStreamWriterOperations.h" // js::WritableStreamDefaultWriter{GetDesiredSize,Release,Write}
#include "js/CallArgs.h" // JS::CallArgs{,FromVp}
#include "js/Class.h" // js::ClassSpec, JS_NULL_CLASS_OPS
#include "js/PropertySpec.h" // JS{Function,Property}Spec, JS_{FS,PS}_END, JS_{FN,PSG}
@ -42,6 +43,7 @@ using js::WritableStream;
using js::WritableStreamCloseQueuedOrInFlight;
using js::WritableStreamDefaultWriter;
using js::WritableStreamDefaultWriterGetDesiredSize;
using js::WritableStreamDefaultWriterRelease;
using js::WritableStreamDefaultWriterWrite;
/*** 4.5. Class WritableStreamDefaultWriter *********************************/
@ -201,6 +203,50 @@ static MOZ_MUST_USE bool WritableStream_close(JSContext* cx, unsigned argc,
return true;
}
/**
* Streams spec, 4.5.4.6. releaseLock()
*/
static MOZ_MUST_USE bool WritableStream_releaseLock(JSContext* cx,
unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1: If ! IsWritableStreamDefaultWriter(this) is false, return a promise
// rejected with a TypeError exception.
Rooted<WritableStreamDefaultWriter*> unwrappedWriter(
cx,
UnwrapAndTypeCheckThis<WritableStreamDefaultWriter>(cx, args, "close"));
if (!unwrappedWriter) {
return false;
}
// Step 2: Let stream be this.[[ownerWritableStream]].
// Step 3: If stream is undefined, return.
if (!unwrappedWriter->hasStream()) {
args.rval().setUndefined();
return true;
}
// Step 4: Assert: stream.[[writer]] is not undefined.
#ifdef DEBUG
{
WritableStream* unwrappedStream =
UnwrapStreamFromWriter(cx, unwrappedWriter);
if (!unwrappedStream) {
return false;
}
MOZ_ASSERT(unwrappedStream->hasWriter());
}
#endif
// Step 5: Perform ! WritableStreamDefaultWriterRelease(this).
if (!WritableStreamDefaultWriterRelease(cx, unwrappedWriter)) {
return false;
}
args.rval().setUndefined();
return true;
}
/**
* Streams spec, 4.5.4.7. write(chunk)
*/
@ -244,6 +290,7 @@ static const JSPropertySpec WritableStreamDefaultWriter_properties[] = {
static const JSFunctionSpec WritableStreamDefaultWriter_methods[] = {
JS_FN("close", WritableStream_close, 0, 0),
JS_FN("releaseLock", WritableStream_releaseLock, 0, 0),
JS_FN("write", WritableStream_write, 1, 0), JS_FS_END};
JS_STREAMS_CLASS_SPEC(WritableStreamDefaultWriter, 0, SlotCount,