From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1727AC61CE8 for ; Fri, 6 Jun 2025 12:44:18 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uNWJ0-0003CR-6n; Fri, 06 Jun 2025 08:36:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uNWIx-00039N-AV for qemu-devel@nongnu.org; Fri, 06 Jun 2025 08:36:15 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uNWIu-0005z2-Kn for qemu-devel@nongnu.org; Fri, 06 Jun 2025 08:36:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1749213370; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=r6T2UdLZ98T4mEFrrnkCvZZaWql+Pj2cZBNd8iq7JhE=; b=daA+JJy5XgclajL0xHN/Vpd4HjoeSEVKAimuiAI1F66lNR76kfnlgNU2DR3NTXrCtFF+Hs y1e1VShyH9uOBUehEyMNRH19V+3YcdtAlPesLG7/MBCkkfT+MGUSTRzEcatq/eCdTJOEuw LF0u/QX+1BDxVRuAerr0Frqn+jQliJw= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-146-ZK5QGKgXOAGEeWXVamvdmg-1; Fri, 06 Jun 2025 08:36:09 -0400 X-MC-Unique: ZK5QGKgXOAGEeWXVamvdmg-1 X-Mimecast-MFC-AGG-ID: ZK5QGKgXOAGEeWXVamvdmg_1749213368 Received: by mail-wm1-f69.google.com with SMTP id 5b1f17b1804b1-450d6768d4dso13428505e9.2 for ; Fri, 06 Jun 2025 05:36:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749213367; x=1749818167; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=r6T2UdLZ98T4mEFrrnkCvZZaWql+Pj2cZBNd8iq7JhE=; b=uYFQEqyYRTm3RckWillkZXdo54/00COOdCNS+HE8PuOgvA8bSWX8B9WfSXa1IfTqMe bSqFAxJ45rVKEBHjkX6h2akpQ3yjTCIseuGVCHl0QRkPsqWMny0qBGemSCbTw2QYlXqP 3k2KRAz3LYNhENL2YuuP+a81yJjqdKeISFj8UtUqrLlLPDl+Y1FvPptwWgb7BWoKDlJO S79nnUBxG0UzCCiPIE6k6GRykny+X0wCK/Fe0vPdYGfwR2JfFpbagS6pPpio8dRq670E OijZdgmdA5/jx2QoR715+Y1aDVmikkrBN000vWCrpp3wSey+gd/FT+e8Dl8N0uE46t42 HU2Q== X-Gm-Message-State: AOJu0YzfBsWoZs0SOH2+eLC9iDpNfWHVaR7wYUhrDBE4jTYg+1ifdTnH 29PmiEhMTDVPZlvazDCzm85Dvr+glol6qe9n3hrqrHkF4dWT08L7GQ7UYGWN+tEQr7MnY5tuFbV 5OJdbNoAuDBo0nxur8O1Lp3RKgOja2kS00V4qjju/QhtiyLUgrbA2Pl2//y3AQHBfY/9+3NzAsf r+mgzYJB17aD3w3AmpYIUuJSOyU7WEHgs38FFf232S X-Gm-Gg: ASbGncvQWlDbzZ2HzotUk0DJEZq8H3YnZyQAMKfZ/XIWy8GD5gpXrPTtbbCr/Epjmlc XD0YUQB6b8uCx0+GONv2kzT+0BcsvgsW02euiVieR9NVwnCi1DoVi1NWbT+RW20JJ4MaZIbcV0l 7L7vFEBATgdtRd+cJao0bfSzEUI+jTkRh+AMsZGa3+1w9IRdYClIHLFm2MfIFtCiNjsCKTeyTZn 3IAaCaUw01Lrd3gC+pTY3eEXrjCl3CVpL7+31GJOpbZb53TA21ZZhBOApsPzd2f+vGpGuLET7Dq 77zol/Sugck0Nw== X-Received: by 2002:a05:600c:310a:b0:441:d4e8:76cd with SMTP id 5b1f17b1804b1-452014235d1mr32936825e9.29.1749213367447; Fri, 06 Jun 2025 05:36:07 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE424q/EwXJFAssQxY2eCPg3Fsp78gspcYwg612N1I05o9/1GG7qSkOkP+1NgweuT2WF32sew== X-Received: by 2002:a05:600c:310a:b0:441:d4e8:76cd with SMTP id 5b1f17b1804b1-452014235d1mr32936535e9.29.1749213366894; Fri, 06 Jun 2025 05:36:06 -0700 (PDT) Received: from [192.168.10.48] ([151.49.64.79]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a53243664fsm1786344f8f.65.2025.06.06.05.36.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Jun 2025 05:36:04 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Akihiko Odaki Subject: [PULL 23/31] qemu-thread: Document QemuEvent Date: Fri, 6 Jun 2025 14:34:37 +0200 Message-ID: <20250606123447.538131-24-pbonzini@redhat.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250606123447.538131-1-pbonzini@redhat.com> References: <20250606123447.538131-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.104, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Akihiko Odaki Document QemuEvent to help choose an appropriate synchronization primitive. Signed-off-by: Akihiko Odaki Link: https://lore.kernel.org/r/20250529-event-v5-12-53b285203794@daynix.com Signed-off-by: Paolo Bonzini --- include/qemu/thread.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/qemu/thread.h b/include/qemu/thread.h index 573f8c9ede2..f0302ed01fd 100644 --- a/include/qemu/thread.h +++ b/include/qemu/thread.h @@ -10,6 +10,16 @@ typedef struct QemuSemaphore QemuSemaphore; typedef struct QemuLockCnt QemuLockCnt; typedef struct QemuThread QemuThread; +/* + * QemuEvent + * ========= + * + * QemuEvent is an implementation of Win32 manual-reset event object. + * For details, refer to: + * https://learn.microsoft.com/en-us/windows/win32/sync/using-event-objects + * + * QemuEvent is more lightweight than QemuSemaphore when HAVE_FUTEX is defined. + */ typedef struct QemuEvent { #ifndef HAVE_FUTEX pthread_mutex_t lock; -- 2.49.0