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Diffstat (limited to 'src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibEvent.cpp')
| -rw-r--r-- | src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibEvent.cpp | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibEvent.cpp b/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibEvent.cpp new file mode 100644 index 00000000..55b1a57e --- /dev/null +++ b/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibEvent.cpp @@ -0,0 +1,103 @@ +/* $Id: VBoxGuestR3LibEvent.cpp $ */ +/** @file + * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Events. + */ + +/* + * Copyright (C) 2007-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <VBox/log.h> +#include <iprt/assert.h> +#include "VBoxGuestR3LibInternal.h" + + +/** + * Wait for the host to signal one or more events and return which. + * + * The events will only be delivered by the host if they have been enabled + * previously using @a VbglR3CtlFilterMask. If one or several of the events + * have already been signalled but not yet waited for, this function will return + * immediately and return those events. + * + * @returns IPRT status code. + * + * @param fMask The events we want to wait for, or-ed together. + * @param cMillies How long to wait before giving up and returning + * (VERR_TIMEOUT). Use RT_INDEFINITE_WAIT to wait until we + * are interrupted or one of the events is signalled. + * @param pfEvents Where to store the events signalled. Optional. + */ +VBGLR3DECL(int) VbglR3WaitEvent(uint32_t fMask, uint32_t cMillies, uint32_t *pfEvents) +{ + LogFlow(("VbglR3WaitEvent: fMask=%#x, cMillies=%u, pfEvents=%p\n", fMask, cMillies, pfEvents)); + AssertReturn((fMask & ~VMMDEV_EVENT_VALID_EVENT_MASK) == 0, VERR_INVALID_PARAMETER); + AssertPtrNullReturn(pfEvents, VERR_INVALID_POINTER); + + VBGLIOCWAITFOREVENTS WaitEvents; + VBGLREQHDR_INIT(&WaitEvents.Hdr, WAIT_FOR_EVENTS); + WaitEvents.u.In.fEvents = fMask; + WaitEvents.u.In.cMsTimeOut = cMillies; + int rc = vbglR3DoIOCtl(VBGL_IOCTL_WAIT_FOR_EVENTS, &WaitEvents.Hdr, sizeof(WaitEvents)); + if (pfEvents) + { + if (RT_SUCCESS(rc)) + *pfEvents = WaitEvents.u.Out.fEvents; + else + *pfEvents = 0; + } + + LogFlow(("VbglR3WaitEvent: rc=%Rrc fEvents=%#x\n", rc, WaitEvents.u.Out.fEvents)); + return rc; +} + + +/** + * Causes any pending VbglR3WaitEvent calls (VBGL_IOCTL_WAIT_FOR_EVENTS) to + * return with a VERR_INTERRUPTED status. + * + * Can be used in combination with a termination flag variable for interrupting + * event loops. After calling this, VBGL_IOCTL_WAIT_FOR_EVENTS should no longer + * be called in the same session. At the time of writing this is not enforced; + * at the time of reading it may be. + * + * @returns IPRT status code. + */ +VBGLR3DECL(int) VbglR3InterruptEventWaits(void) +{ + VBGLREQHDR Req; + VBGLREQHDR_INIT(&Req, INTERRUPT_ALL_WAIT_FOR_EVENTS); + return vbglR3DoIOCtl(VBGL_IOCTL_INTERRUPT_ALL_WAIT_FOR_EVENTS, &Req, sizeof(Req)); +} + |