Allocate JavaScriptEventLoop per thread in multi-threaded environment #255
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This change makes
JavaScriptEventLoop
to be allocated per thread in multi-threaded environment. This is necessary to ensure that a job enqueued in one thread is executed in the same thread because JSObject managed by a worker can only be accessed in the same thread.Currently,
swift_task_enqueueMainExecutor_hook
continues enqueuing jobs to the current thread event loop. It should eventually enqueue to the main thread event loop even if it's enqueued from worker threads.