From nobody Sun Dec 14 06:15:46 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1632771168637134.80616642777306; Mon, 27 Sep 2021 12:32:48 -0700 (PDT) Received: from localhost ([::1]:45604 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mUwMp-0001xW-EQ for importer@patchew.org; Mon, 27 Sep 2021 15:32:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57534) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mUwH8-00028Q-Lb for qemu-devel@nongnu.org; Mon, 27 Sep 2021 15:26:54 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:31020) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mUwH6-0006lu-G7 for qemu-devel@nongnu.org; Mon, 27 Sep 2021 15:26:54 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-402-83S6mfcvPKmqsJt8S73Nqg-1; Mon, 27 Sep 2021 15:26:50 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 062F41084681; Mon, 27 Sep 2021 19:26:49 +0000 (UTC) Received: from scv.redhat.com (unknown [10.22.9.55]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5A38A60871; Mon, 27 Sep 2021 19:26:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1632770811; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8mWniNIMmCePwjlVa0JY+qDWL1wn2A8WJ40ToWhtwqo=; b=AEn0bgp8oKCwYdw6u6Z5vtzysM0neYxmGzheppg5kTsryy4AgVvQSQZU3AhSI6zqhwy8F1 zb2l2GaIFBWkmMUE0rKIrn0ZMz4EEYVUg/1F1wQXooJ8HTGL61u+pgWIDKbdku+q4QQaqI Rrv7YIMJRD+9F6khiHNcGUKtJbZLOXg= X-MC-Unique: 83S6mfcvPKmqsJt8S73Nqg-1 From: John Snow To: qemu-devel@nongnu.org Subject: [PULL 04/32] python/aqmp: add asyncio compatibility wrappers Date: Mon, 27 Sep 2021 15:24:45 -0400 Message-Id: <20210927192513.744199-5-jsnow@redhat.com> In-Reply-To: <20210927192513.744199-1-jsnow@redhat.com> References: <20210927192513.744199-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Thomas Huth , Daniel Berrange , Eduardo Habkost , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Markus Armbruster , Wainer dos Santos Moschetta , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Willian Rampazzo , Cleber Rosa , John Snow Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1632771169068100002 Content-Type: text/plain; charset="utf-8" Python 3.6 does not have all of the goodies that Python 3.7 does, and we need to support both. Add some compatibility wrappers needed for this purpose. (Note: Python 3.6 is EOL December 2021.) Signed-off-by: John Snow Message-id: 20210915162955.333025-5-jsnow@redhat.com Signed-off-by: John Snow --- python/qemu/aqmp/util.py | 89 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 python/qemu/aqmp/util.py diff --git a/python/qemu/aqmp/util.py b/python/qemu/aqmp/util.py new file mode 100644 index 00000000000..28acd995dbf --- /dev/null +++ b/python/qemu/aqmp/util.py @@ -0,0 +1,89 @@ +""" +Miscellaneous Utilities + +This module provides asyncio utilities and compatibility wrappers for +Python 3.6 to provide some features that otherwise become available in +Python 3.7+. +""" + +import asyncio +import sys +from typing import ( + Any, + Coroutine, + Optional, + TypeVar, +) + + +T =3D TypeVar('T') + + +# ------------------------------- +# Section: Compatibility Wrappers +# ------------------------------- + + +def create_task(coro: Coroutine[Any, Any, T], + loop: Optional[asyncio.AbstractEventLoop] =3D None + ) -> 'asyncio.Future[T]': + """ + Python 3.6-compatible `asyncio.create_task` wrapper. + + :param coro: The coroutine to execute in a task. + :param loop: Optionally, the loop to create the task in. + + :return: An `asyncio.Future` object. + """ + if sys.version_info >=3D (3, 7): + if loop is not None: + return loop.create_task(coro) + return asyncio.create_task(coro) # pylint: disable=3Dno-member + + # Python 3.6: + return asyncio.ensure_future(coro, loop=3Dloop) + + +def is_closing(writer: asyncio.StreamWriter) -> bool: + """ + Python 3.6-compatible `asyncio.StreamWriter.is_closing` wrapper. + + :param writer: The `asyncio.StreamWriter` object. + :return: `True` if the writer is closing, or closed. + """ + if sys.version_info >=3D (3, 7): + return writer.is_closing() + + # Python 3.6: + transport =3D writer.transport + assert isinstance(transport, asyncio.WriteTransport) + return transport.is_closing() + + +async def wait_closed(writer: asyncio.StreamWriter) -> None: + """ + Python 3.6-compatible `asyncio.StreamWriter.wait_closed` wrapper. + + :param writer: The `asyncio.StreamWriter` to wait on. + """ + if sys.version_info >=3D (3, 7): + await writer.wait_closed() + return + + # Python 3.6 + transport =3D writer.transport + assert isinstance(transport, asyncio.WriteTransport) + + while not transport.is_closing(): + await asyncio.sleep(0) + + # This is an ugly workaround, but it's the best I can come up with. + sock =3D transport.get_extra_info('socket') + + if sock is None: + # Our transport doesn't have a socket? ... + # Nothing we can reasonably do. + return + + while sock.fileno() !=3D -1: + await asyncio.sleep(0) --=20 2.31.1