Bug 223565 – Add AVAudioSessionCaptureDeviceManager::isolatedCopy and use it to copy device list calculated on background queue

• Component: WebRTC
• Status: RESOLVED FIXED

[Eric Carlson]

AVAudioSessionCaptureDeviceManager should use crossThreadCopy on CaptureDevice list allocated on a background queue.

[Eric Carlson]

<rdar://75480589>

[Eric Carlson]

Created attachment 423848 [details]
Patch

[youenn fablet]

Comment on attachment 423848 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=423848&action=review

> Source/WebCore/platform/mediastream/ios/AVAudioSessionCaptureDevice.h:42
> +    AVAudioSessionCaptureDevice isolatedCopy() const;

We could try to change it to: AVAudioSessionCaptureDevice isolatedCopy() &&;

> Source/WebCore/platform/mediastream/ios/AVAudioSessionCaptureDevice.mm:61
> +        groupId().isolatedCopy(),

If we go with isolatedCopy() &&, doing WTFMove(m_persistentId).isolatedCopy(), WTFMove(m_groupId).isolatedCopy() will most probably remove the memory allocation of a new string.

[Eric Carlson]

Created attachment 423905 [details]
Patch for landing

[youenn fablet]

Comment on attachment 423905 [details]
Patch for landing

View in context: https://bugs.webkit.org/attachment.cgi?id=423905&action=review

> Source/WebCore/platform/mediastream/ios/AVAudioSessionCaptureDevice.mm:58
> +        m_persistentId.isolatedCopy(),

WTFMove(m_persistentId) would remove a potential memory allocation.

> Source/WebCore/platform/mediastream/ios/AVAudioSessionCaptureDevice.mm:61
> +        m_groupId.isolatedCopy(),

Ditto for m_label and m_groupId.

[Eric Carlson]

Created attachment 423938 [details]
Updated patch for landing

[EWS]

Committed r274819: <https://commits.webkit.org/r274819>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 423938 [details].