MacOS - cannot fetch event from a worker thread (OS X restriction)

[salman451]

sweep firmware version

1.4

libsweep version + affected bindings

1.2.1 libsweep/examples/viewer.cc

operating system

macOS Sierra 10.12.5

Platform/Hardware Setup

MacBook pro 12,5 (2015)

Description:

In /libsweep/examples/ when i run example-viewer, it repeatedly gives me the message:

"cannot fetch event from a worker thread (OS X restriction)"

[daniel-j-h]

Seems like a macOS limitation we're hitting with sfml2 here:

https://github.com/SFML/SFML/blob/bd479c4454c0322f60386e5644495400703e41f3/src/SFML/Window/OSX/SFViewController.mm#L243-L261

which means we can not handle events in the worker thread here. We could work around that by scanning in the worker thread and doing all event polling and rendering in the main thread.