Pipewire backend: use pipewire thread lock #3136
Merged
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Fixes #3047.
I haven't encountered any issues since adopting these locks. Calling https://github.com/hrdl-github/Waybar/blob/74773885c6166d190a294ad945b1f1d4d5f007ec/src/util/pipewire/pipewire_backend.cpp#L81 without locking causes the warning described in #3047 (comment). I am less certain whether the lock in the constructor is required.