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[SR-6810] Timer does not fire in Linux, if added into .commonModes #4263

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swift-ci opened this issue Jan 23, 2018 · 3 comments
Open

[SR-6810] Timer does not fire in Linux, if added into .commonModes #4263

swift-ci opened this issue Jan 23, 2018 · 3 comments
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@millenomi
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bug Foundation Linux

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Previous ID SR-6810
Radar None
Original Reporter ttflee (JIRA User)
Type Bug

Attachment: Download

Environment

Ubuntu 14.04, 16.04

Swift 4.0.3

Additional Detail from JIRA
Votes 0
Component/s Foundation
Labels Bug, Linux
Assignee @millenomi
Priority Medium

md5: 8a1f53554802145e87b26cf3d865b8f8

Issue Description:

Timer added to .commonModes could not be fired in Ubuntu 14.04/Swift 4.0.3 RELEASE. On the contrary, Dispatch Source Timer does work smoothly.

The open sourced implementations of CFRunLoopAddSource(), CFRunLoopAddObserver(), CFRunLoopAddTimer() etc., compare modeName against kCFRunLoopCommonModes using identity (==) rather than equality (CFEqual()). This might be the root cause of the issue and others.
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Comment by Zhang Chen (JIRA)

`Timer.scheduledTimer(withTimeInterval:repeats:block)` works.

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Comment by Zhang Chen (JIRA)

The reason seems to be that commonModes is not supported in RunLoop for Linux.

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Comment by Zhang Chen (JIRA)

The CFRunLoop implementation compares run loop mode name against kCFRunLoopCommonModes using identity of C string, rather than CFEqual().

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 5, 2022
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@millenomi millenomi

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bug Foundation Linux
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