macOS: notify about already-connected devices at the same time#363
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micolous wants to merge 2 commits into
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macOS: notify about already-connected devices at the same time#363micolous wants to merge 2 commits into
micolous wants to merge 2 commits into
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… and notify about all existing devices at the same time (mozilla#362)
jschanck
reviewed
Jul 13, 2026
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Fixes #362, unblocks #315
This calls
IOHIDManagerCopyDevicesbefore starting theCFRunLoopforIOHIDManager, so that there is a singleDevicesAddedevent containing all already-connected devices, much like you'd get on Linux. If there are zero already-connected devices, then it sendsDevicesAdded(vec![]).This addresses a potential race condition if
IOHIDManageris slow to notify about a device which is already connected.IOHIDManagerstill callsDeviceMatchingCallbackfor every already-connected device once aCFRunLoophas started, so this also ignores duplicate events.