gevent.py 文件源码

def apply_patch(hogging_detection=False, real_threads=1):
    _logger.info('applying gevent patch (%s real threads)', real_threads)

    # real_threads is 1 by default so it will be possible to run watch_threads concurrently
    if hogging_detection:
        real_threads += 1

    if real_threads:
        _RealThreadsPool(real_threads)

    _patch_module_locks()

    import gevent
    import gevent.monkey

    for m in ["easypy.threadtree", "easypy.concurrency"]:
        assert m not in sys.modules, "Must apply the gevent patch before importing %s" % m

    gevent.monkey.patch_all(Event=True, sys=True)

    _unpatch_logging_handlers_lock()

    global HUB
    HUB = gevent.get_hub()

    global threading
    import threading
    for thread in threading.enumerate():
        _set_thread_uuid(thread.ident)
    _set_main_uuid()  # the patched threading has a new ident for the main thread

    # this will declutter the thread dumps from gevent/greenlet frames
    from .threadtree import _BOOTSTRAPPERS
    import gevent, gevent.threading, gevent.greenlet
    _BOOTSTRAPPERS.update([gevent, gevent.threading, gevent.greenlet])

    if hogging_detection:
        import greenlet
        greenlet.settrace(lambda *args: _greenlet_trace_func(*args))
        defer_to_thread(detect_hogging, 'detect-hogging')