[Bug]: Android Oboe audio callback onAudioReady() invokes pthread_mutex_lock()

[atsushieno]

Detailed steps on how to reproduce the bug

I found modules/juce_audio_devices/native/juce_Oboe_android.cpp involves pthread_mutex_lock(), which is not realtime safe:

JUCE/modules/juce_audio_devices/native/juce_Oboe_android.cpp

Line 1367 in db60c1d

pthread_mutex_lock (&threadReadyMutex);

Some folks are facing weird Oboe audio latency problem with tracktion_engine. Probably this is the cause of the issue.

What is the expected behaviour?

Oboe driver should not involve mutex lock (at least the default Bionic libc implementation is no-go).

Operating systems

Android

What versions of the operating systems?

Android 14 (any version after Android 8.0 should be affected)

Architectures

x86_64, ARM, 64-bit, 32-bit

Stacktrace

No response

Plug-in formats (if applicable)

No response

Plug-in host applications (DAWs) (if applicable)

No response

Testing on the develop branch

The bug is present on the develop branch

Code of Conduct

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