tree b5273c5dc08339721524e4e157c560f6d6888807
parent 72be8c726400c824b623e5fa1dac1b199ec829ae
author cdumez@apple.com <cdumez@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1585860543 +0000
committer cdumez@apple.com <cdumez@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1585860543 +0000

[iOS] Replace UIKit background task with a RunningBoard FinishTaskInterruptable assertion
https://bugs.webkit.org/show_bug.cgi?id=209825
<rdar://problem/61118503>

Reviewed by Geoffrey Garen.

Source/WebKit:

Replace UIKit background task with a RunningBoard FinishTaskInterruptable assertion on iOS.
Our UIProcess gets terminated too frequently when the UIKit background task expires when
the UIProcess holds it for longer than 30 seconds in the background. The RunningBoard
FinishTaskInterruptable assertion is supposed to be equivalent but would cause suspension
of our UIProcess on expiration, instead of termination.

* UIProcess/ios/ProcessAssertionIOS.mm:
(-[WKProcessAssertionBackgroundTaskManager init]):
(-[WKProcessAssertionBackgroundTaskManager _scheduleReleaseTask]):
(-[WKProcessAssertionBackgroundTaskManager _cancelPendingReleaseTask]):
(-[WKProcessAssertionBackgroundTaskManager _hasBackgroundTask]):
(-[WKProcessAssertionBackgroundTaskManager _updateBackgroundTask]):
(-[WKProcessAssertionBackgroundTaskManager assertionWillInvalidate:]):
(-[WKProcessAssertionBackgroundTaskManager assertion:didInvalidateWithError:]):
(-[WKProcessAssertionBackgroundTaskManager _handleBackgroundTaskExpiration]):
(-[WKProcessAssertionBackgroundTaskManager _releaseBackgroundTask]):

Source/WTF:

Add build-time flag for WebKit-specific assertion in RunningBoard.

* wtf/PlatformHave.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@259414 268f45cc-cd09-0410-ab3c-d52691b4dbfc