diff options
Diffstat (limited to 'src/plugins/platforms/xcb/qxcbeventqueue.cpp')
| -rw-r--r-- | src/plugins/platforms/xcb/qxcbeventqueue.cpp | 62 |
1 files changed, 15 insertions, 47 deletions
diff --git a/src/plugins/platforms/xcb/qxcbeventqueue.cpp b/src/plugins/platforms/xcb/qxcbeventqueue.cpp index 759ee3cc95..33795d63cf 100644 --- a/src/plugins/platforms/xcb/qxcbeventqueue.cpp +++ b/src/plugins/platforms/xcb/qxcbeventqueue.cpp @@ -1,41 +1,5 @@ -/**************************************************************************** -** -** Copyright (C) 2018 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtCore module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2018 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only #include "qxcbeventqueue.h" #include "qxcbconnection.h" @@ -47,8 +11,8 @@ QT_BEGIN_NAMESPACE -static QBasicMutex qAppExiting; -static bool dispatcherOwnerDestructing = false; +Q_CONSTINIT static QBasicMutex qAppExiting; +Q_CONSTINIT static bool dispatcherOwnerDestructing = false; /*! \class QXcbEventQueue @@ -62,8 +26,8 @@ static bool dispatcherOwnerDestructing = false; when accessing the tail node. It does not dequeue the last node and does not access (read or write) the tail node's 'next' member. This lets the reader add more items at the same time as the main thread is dequeuing nodes from - the head. A custom linked list implementation is used, because QLinkedList - does not have any thread-safety guarantees and the custom list is more + the head. A custom linked list implementation is used, because std::list + does not have any thread-safety guarantees. The custom list is lightweight - no reference counting, back links, etc. Memory management: @@ -226,6 +190,8 @@ void QXcbEventQueue::run() }; while (!m_closeConnectionDetected && (event = xcb_wait_for_event(connection))) { + // This lock can block only if there are users of waitForNewEvents(). + // Currently only the clipboard implementation relies on it. m_newEventsMutex.lock(); enqueueEvent(event); while (!m_closeConnectionDetected && (event = xcb_poll_for_queued_event(connection))) @@ -350,12 +316,12 @@ bool QXcbEventQueue::peekEventQueue(PeekerCallback peeker, void *peekerData, return result; } -void QXcbEventQueue::waitForNewEvents(unsigned long time) +void QXcbEventQueue::waitForNewEvents(const QXcbEventNode *sinceFlushedTail, + unsigned long time) { QMutexLocker locker(&m_newEventsMutex); - QXcbEventNode *tailBeforeFlush = m_flushedTail; flushBufferedEvents(); - if (tailBeforeFlush != m_flushedTail) + if (sinceFlushedTail != m_flushedTail) return; m_newEventsCondition.wait(&m_newEventsMutex, time); } @@ -379,7 +345,7 @@ void QXcbEventQueue::sendCloseConnectionEvent() const event.format = 32; event.sequence = 0; event.window = window; - event.type = m_connection->atom(QXcbAtom::_QT_CLOSE_CONNECTION); + event.type = m_connection->atom(QXcbAtom::Atom_QT_CLOSE_CONNECTION); event.data.data32[0] = 0; xcb_send_event(c, false, window, XCB_EVENT_MASK_NO_EVENT, reinterpret_cast<const char *>(&event)); @@ -391,10 +357,12 @@ bool QXcbEventQueue::isCloseConnectionEvent(const xcb_generic_event_t *event) { if (event && (event->response_type & ~0x80) == XCB_CLIENT_MESSAGE) { auto clientMessage = reinterpret_cast<const xcb_client_message_event_t *>(event); - if (clientMessage->type == m_connection->atom(QXcbAtom::_QT_CLOSE_CONNECTION)) + if (clientMessage->type == m_connection->atom(QXcbAtom::Atom_QT_CLOSE_CONNECTION)) m_closeConnectionDetected = true; } return m_closeConnectionDetected; } QT_END_NAMESPACE + +#include "moc_qxcbeventqueue.cpp" |