From nobody Tue Feb 10 02:28:04 2026 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 1646917790071754.7484962246853; Thu, 10 Mar 2022 05:09:50 -0800 (PST) Received: from localhost ([::1]:49844 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nSIY9-0006uI-2c for importer@patchew.org; Thu, 10 Mar 2022 08:09:49 -0500 Received: from eggs.gnu.org ([209.51.188.92]:41850) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nSIA6-0007EH-By; Thu, 10 Mar 2022 07:44:58 -0500 Received: from [2a00:1450:4864:20::336] (port=45573 helo=mail-wm1-x336.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nSIA4-0005Ia-Fx; Thu, 10 Mar 2022 07:44:57 -0500 Received: by mail-wm1-x336.google.com with SMTP id k29-20020a05600c1c9d00b003817fdc0f00so3287689wms.4; Thu, 10 Mar 2022 04:44:55 -0800 (PST) Received: from avogadro.lan ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id r188-20020a1c2bc5000000b00387c81c32e7sm8063026wmr.8.2022.03.10.04.44.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Mar 2022 04:44:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=r2jDEb+fQm79ZJXGhBcmAyaMICDBYPXvzMm0Xp2UO7o=; b=M2Qvm+uRj6PfwreH80nS5UJEnUF+iYaW2MLQLFT1rAXuV1/cActPRc+RhW4S2mn3CN 3DdTIeUPwzgXky0xT4FA455/bfvLhcCg/Aruw/a6zY0W7ksSwcQZfKthMJzAkA2kLg2S xIytQMKOkjJ7ag6T99mTgSjD/IlCtHxR8zJB6/Bi4OtzWXWVDFdMxj85xp6vSO77FHD/ w+OMzHqW2iowUEqhqT0oQ69Ddcw0I1NxjKb6MqlmCeLI7dgDihkZv7EUDJrTgoIGVapb 8A3xWhMNkSFNTEFYYv/WrmHJ4wqDB/LBJ+JeYmxXqKLEgSy2CmvcnQ5CoMbaTpo37ocz 4tZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=r2jDEb+fQm79ZJXGhBcmAyaMICDBYPXvzMm0Xp2UO7o=; b=ArVnIAg97OgX580lCP6Cew1IDCWCBrBzbpwi5fxURXQflh+X8tP8YQRM2KBo3rNfNh boZGXRa2OYmanw1vrcltxNadErom/XpVtynO08rgNFUM0hg2m+nH3SV+5CsUzHM4zHbs 1wgH3z3TgNQnNHtXl2fQ5lorDFn+k7WcyLS4zOaH4h6pq6tr63E46KlAXG2JBtN/UEES 16JUQpNjjtBRw7/Pb/2FHUd6V2H2joOuwviFCklKxs2bQGVP2+2oynUQuxklWyZLHNGI 2zZPK/iK6o4otsp9ML6G83N4bqtawr38677Y0Pkm9irY7eqC/qJ1dtNerFLwGTAkzTJH Fxeg== X-Gm-Message-State: AOAM532yyc888PBF8kWm1i9zKPch9f5StmmY21PC1aLixa0TG+ZCrFsV DOS49+feDGVge8m7S5IE0yRg5Xtwa4Q= X-Google-Smtp-Source: ABdhPJz/iqZ3ZxorO7rL/4gV8TpN86OYwwRP2TFUVyHkAxT9Yq+PzeTYSKkYnRRNPDnDJnE2X9t86g== X-Received: by 2002:a05:600c:3b21:b0:389:9738:be0f with SMTP id m33-20020a05600c3b2100b003899738be0fmr3348946wms.9.1646916294875; Thu, 10 Mar 2022 04:44:54 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PATCH 32/35] qemu_co_rwlock_wrlock Date: Thu, 10 Mar 2022 13:44:10 +0100 Message-Id: <20220310124413.1102441-33-pbonzini@redhat.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220310124413.1102441-1-pbonzini@redhat.com> References: <20220310124413.1102441-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a00:1450:4864:20::336 (failed) 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=2a00:1450:4864:20::336; envelope-from=paolo.bonzini@gmail.com; helo=mail-wm1-x336.google.com X-Spam_score_int: 0 X-Spam_score: -0.1 X-Spam_bar: / X-Spam_report: (-0.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Cc: hreitz@redhat.com, stefanha@redhat.com, qemu-block@nongnu.org, sguelton@redhat.com 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: 1646917792781100001 Content-Type: text/plain; charset="utf-8" Signed-off-by: Paolo Bonzini --- util/qemu-coroutine-lock.c | 36 ++++++++++++++++++++++++++++-------- 1 file changed, 28 insertions(+), 8 deletions(-) diff --git a/util/qemu-coroutine-lock.c b/util/qemu-coroutine-lock.c index 5a7b99cfaf..c0541171d4 100644 --- a/util/qemu-coroutine-lock.c +++ b/util/qemu-coroutine-lock.c @@ -512,27 +512,47 @@ CoroutineAction qemu_co_rwlock_downgrade(CoRwlock *lo= ck) return CO_INIT_FRAME(qemu_co_rwlock_downgrade, lock); } =20 -#if 0 -void qemu_co_rwlock_wrlock(CoRwlock *lock) +CO_DECLARE_FRAME(qemu_co_rwlock_wrlock, CoRwlock *lock, Coroutine *self, C= oRwTicket my_ticket); +static CoroutineAction co__qemu_co_rwlock_wrlock(void *_frame) { + struct FRAME__qemu_co_rwlock_wrlock *_f =3D _frame; + CO_ARG(lock); Coroutine *self =3D qemu_coroutine_self(); =20 - qemu_co_mutex_lock(&lock->mutex); +switch(_f->_step) { +case 0: +_f->_step =3D 1; +CO_SAVE(self); + return qemu_co_mutex_lock(&lock->mutex); +case 1: +CO_LOAD(self); if (lock->owners =3D=3D 0) { lock->owners =3D -1; qemu_co_mutex_unlock(&lock->mutex); } else { - CoRwTicket my_ticket =3D { false, self }; + _f->my_ticket =3D (CoRwTicket){ false, self }; =20 - QSIMPLEQ_INSERT_TAIL(&lock->tickets, &my_ticket, next); + QSIMPLEQ_INSERT_TAIL(&lock->tickets, &_f->my_ticket, next); qemu_co_mutex_unlock(&lock->mutex); - qemu_coroutine_yield(); +_f->_step =3D 2; + return qemu_coroutine_yield(); +case 2: +CO_LOAD(self); assert(lock->owners =3D=3D -1); } - - self->locks_held++; + break; } =20 + self->locks_held++; +return stack_free(&_f->common); +} + +CoroutineAction qemu_co_rwlock_wrlock(CoRwlock *lock) +{ + return CO_INIT_FRAME(qemu_co_rwlock_wrlock, lock); +} + +#if 0 void qemu_co_rwlock_upgrade(CoRwlock *lock) { qemu_co_mutex_lock(&lock->mutex); --=20 2.35.1