Function dart_sys::Dart_SetMessageNotifyCallback

pub unsafe extern "C" fn Dart_SetMessageNotifyCallback(
    message_notify_callback: Dart_MessageNotifyCallback
)

Allows embedders to provide a custom wakeup mechanism for the delivery of inter-isolate messages. This setting only applies to the current isolate.

This mechanism is optional: if not provided, the isolate will be scheduled on a VM-managed thread pool. An embedder should provide this callback if it wants to run an isolate on a specific thread or to interleave handling of inter-isolate messages with other event sources.

Most embedders will only call this function once, before isolate execution begins. If this function is called after isolate execution begins, the embedder is responsible for threading issues.