cg-process-wait

Arguments: whostate function &rest args

This function is needed only on platforms where Allegro's threads are not native operating system threads. On these platforms, the value of *use-single-cg-event-handling-process* will be true. It is also the case on these platforms that events cannot be handled while the *single-cg-event-handling-process* is in a call to process-wait. Therefore, if the *single-cg-event-handling-process* does call process-wait, all event-handling would be permanently hung.

To avoid this problem, you can call cg-process-wait instead of process-wait in any code that might be run on a non-native threads platform in Common Graphics's event-handling process. If the platform uses native threads or the call is not in Common Graphics's event-handling process, then process-wait is called directly. Otherwise the non-native threads event-handling process will emulate process-wait by calling the specified function in an event-handling loop until the function returns true.

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This page was not revised from the 9.0 page.
Created 2015.5.21.