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Bug 1818305 - Part 3: Check streamStatus from nsAStreamCopier, r=xpcom-reviewers,mccr8

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This will ensure that errors in one side of a NS_AsyncCopy will more reliably
propagate to the other side of the NS_AsyncCopy, by allowing us to check for
situations like stream closure reliably even when the other side either has no
available data, or no available space.

Differential Revision: https://phabricator.services.mozilla.com/D170698
This commit is contained in:
Nika Layzell 2023-03-15 19:52:34 +00:00
parent 3b40268cc1
commit ff7f4f17f4
1 changed files with 6 additions and 2 deletions
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8
xpcom/io/nsStreamUtils.cpp
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@ -530,7 +530,9 @@ class nsStreamCopierIB final : public nsAStreamCopier {
uint32_t n;
*aSourceCondition =
mSource->ReadSegments(ConsumeInputBuffer, &state, mChunkSize, &n);
*aSinkCondition = state.mSinkCondition;
*aSinkCondition = NS_SUCCEEDED(state.mSinkCondition) && n == 0
? mSink->StreamStatus()
: state.mSinkCondition;
return n;
}
@ -572,7 +574,9 @@ class nsStreamCopierOB final : public nsAStreamCopier {
uint32_t n;
*aSinkCondition =
mSink->WriteSegments(FillOutputBuffer, &state, mChunkSize, &n);
*aSourceCondition = state.mSourceCondition;
*aSourceCondition = NS_SUCCEEDED(state.mSourceCondition) && n == 0
? mSource->StreamStatus()
: state.mSourceCondition;
return n;
}