[WK2] Network process unblocks all waiting threads when any sync reply arrives

[Alexey Proskuryakov]

BlockingResourceMap has a single ThreadCondition, and wakes up all waiting loader threads.

This does not have to be so inefficient.

<rdar://problem/12886430>

[Alexey Proskuryakov]

Created attachment 182437 [details]
proposed patch

[Brady Eidson]

Comment on attachment 182437 [details]
proposed patch

View in context: https://bugs.webkit.org/attachment.cgi?id=182437&action=review

> Source/WebKit2/NetworkProcess/NetworkResourceLoader.cpp:190
> -    if (!send(Messages::WebResourceLoader::WillSendRequest(requestID, request, redirectResponse))) {
> +    if (!sendSync(Messages::WebResourceLoader::WillSendRequest(request, redirectResponse), Messages::WebResourceLoader::WillSendRequest::Reply(request)))

If the premise is that it's okay to make this a sync message because it's *always* on a background thread, please ASSERT to that effect.

> Source/WebKit2/NetworkProcess/NetworkResourceLoader.cpp:288
> -    if (!send(Messages::WebResourceLoader::CanAuthenticateAgainstProtectionSpace(requestID, protectionSpace)))
> +    bool result;
> +    if (!sendSync(Messages::WebResourceLoader::CanAuthenticateAgainstProtectionSpace(protectionSpace), Messages::WebResourceLoader::CanAuthenticateAgainstProtectionSpace::Reply(result)))

If the premise is that it's okay to make this a sync message because it's *always* on a background thread, please ASSERT to that effect.

[Alexey Proskuryakov]

Good point.

Committed <http://trac.webkit.org/r139516>.