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// Copyright (C) 2017 QNX Software Systems. All rights reserved.
// Copyright (C) 2011 - 2012 Research In Motion
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qqnxglobal.h"
#include "qqnxscreeneventthread.h"
#include "qqnxscreeneventhandler.h"
#include <QtCore/QDebug>
#include <errno.h>
#include <unistd.h>
#include <cctype>
#if defined(QQNXSCREENEVENTTHREAD_DEBUG)
#define qScreenEventThreadDebug qDebug
#else
#define qScreenEventThreadDebug QT_NO_QDEBUG_MACRO
#endif
static const int c_screenCode = _PULSE_CODE_MINAVAIL + 0;
static const int c_armCode = _PULSE_CODE_MINAVAIL + 1;
static const int c_quitCode = _PULSE_CODE_MINAVAIL + 2;
#if !defined(screen_register_event)
int screen_register_event(screen_context_t, struct sigevent *event)
{
return MsgRegisterEvent(event, -1);
}
int screen_unregister_event(struct sigevent *event)
{
return MsgUnregisterEvent(event);
}
#endif
QQnxScreenEventThread::QQnxScreenEventThread(screen_context_t context)
: QThread()
, m_screenContext(context)
{
m_channelId = ChannelCreate(_NTO_CHF_DISCONNECT | _NTO_CHF_UNBLOCK | _NTO_CHF_PRIVATE);
if (m_channelId == -1) {
qFatal("QQnxScreenEventThread: Can't continue without a channel");
}
m_connectionId = ConnectAttach(0, 0, m_channelId, _NTO_SIDE_CHANNEL, 0);
if (m_connectionId == -1) {
ChannelDestroy(m_channelId);
qFatal("QQnxScreenEventThread: Can't continue without a channel connection");
}
SIGEV_PULSE_INIT(&m_screenEvent, m_connectionId, SIGEV_PULSE_PRIO_INHERIT, c_screenCode, 0);
if (screen_register_event(m_screenContext, &m_screenEvent) == -1) {
ConnectDetach(m_connectionId);
ChannelDestroy(m_channelId);
qFatal("QQnxScreenEventThread: Can't continue without a registered event");
}
screen_notify(m_screenContext, SCREEN_NOTIFY_EVENT, nullptr, &m_screenEvent);
}
QQnxScreenEventThread::~QQnxScreenEventThread()
{
// block until thread terminates
shutdown();
screen_notify(m_screenContext, SCREEN_NOTIFY_EVENT, nullptr, nullptr);
screen_unregister_event(&m_screenEvent);
ConnectDetach(m_connectionId);
ChannelDestroy(m_channelId);
}
void QQnxScreenEventThread::run()
{
qScreenEventThreadDebug("screen event thread started");
while (1) {
struct _pulse msg;
memset(&msg, 0, sizeof(msg));
int receiveId = MsgReceive(m_channelId, &msg, sizeof(msg), nullptr);
if (receiveId == 0 && msg.code == c_quitCode)
break;
else if (receiveId == 0)
handlePulse(msg);
else if (receiveId > 0)
qWarning() << "Unexpected message" << msg.code;
else
qWarning() << "MsgReceive error" << strerror(errno);
}
qScreenEventThreadDebug("screen event thread stopped");
}
void QQnxScreenEventThread::armEventsPending(int count)
{
MsgSendPulse(m_connectionId, SIGEV_PULSE_PRIO_INHERIT, c_armCode, count);
}
void QQnxScreenEventThread::handleScreenPulse(const struct _pulse &msg)
{
Q_UNUSED(msg);
++m_screenPulsesSinceLastArmPulse;
if (m_emitNeededOnNextScreenPulse) {
m_emitNeededOnNextScreenPulse = false;
Q_EMIT eventsPending();
}
}
void QQnxScreenEventThread::handleArmPulse(const struct _pulse &msg)
{
if (msg.value.sival_int == 0 && m_screenPulsesSinceLastArmPulse == 0) {
m_emitNeededOnNextScreenPulse = true;
} else {
m_screenPulsesSinceLastArmPulse = 0;
m_emitNeededOnNextScreenPulse = false;
Q_EMIT eventsPending();
}
}
void QQnxScreenEventThread::handlePulse(const struct _pulse &msg)
{
if (msg.code == c_screenCode)
handleScreenPulse(msg);
else if (msg.code == c_armCode)
handleArmPulse(msg);
else
qWarning() << "Unexpected pulse" << msg.code;
}
void QQnxScreenEventThread::shutdown()
{
MsgSendPulse(m_connectionId, SIGEV_PULSE_PRIO_INHERIT, c_quitCode, 0);
qScreenEventThreadDebug("screen event thread shutdown begin");
// block until thread terminates
wait();
qScreenEventThreadDebug("screen event thread shutdown end");
}
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