QTimerInfoList Class Reference

#include <qeventdispatcher_unix_p.h>

Inheritance diagram for QTimerInfoList:

Public Functions
int	activateTimers ()
	QTimerInfoList ()
QList< QPair< int, int > >	registeredTimers (QObject *object) const
void	registerTimer (int timerId, int interval, QObject *object)
void	repairTimersIfNeeded ()
void	timerInsert (QTimerInfo *)
void	timerRepair (const timeval &)
bool	timerWait (timeval &)
bool	unregisterTimer (int timerId)
bool	unregisterTimers (QObject *object)
timeval	updateCurrentTime ()
Public Functions inherited from QList< QTimerInfo *>
void	append (const QTimerInfo * &t)
	Inserts value at the end of the list. More...
void	append (const QList< QTimerInfo * > &t)
	Appends the items of the value list to this list. More...
const QTimerInfo * &	at (int i) const
	Returns the item at index position i in the list. More...
QTimerInfo * &	back ()
	This function is provided for STL compatibility. More...
const QTimerInfo * &	back () const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
iterator	begin ()
	Returns an STL-style iterator pointing to the first item in the list. More...
const_iterator	begin () const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void	clear ()
	Removes all items from the list. More...
const_iterator	constBegin () const
	Returns a const STL-style iterator pointing to the first item in the list. More...
const_iterator	constEnd () const
	Returns a const STL-style iterator pointing to the imaginary item after the last item in the list. More...
QBool	contains (const QTimerInfo * &t) const
	Returns true if the list contains an occurrence of value; otherwise returns false. More...
int	count (const QTimerInfo * &t) const
	Returns the number of occurrences of value in the list. More...
int	count () const
	Returns the number of items in the list. More...
void	detach ()
void	detachShared ()
	This prevents needless mallocs, and makes QList more exception safe in case of cleanup work done in destructors on empty lists. More...
bool	empty () const
	This function is provided for STL compatibility. More...
iterator	end ()
	Returns an STL-style iterator pointing to the imaginary item after the last item in the list. More...
const_iterator	end () const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
bool	endsWith (const QTimerInfo * &t) const
	Returns true if this list is not empty and its last item is equal to value; otherwise returns false. More...
iterator	erase (iterator pos)
	Removes the item associated with the iterator pos from the list, and returns an iterator to the next item in the list (which may be end()). More...
iterator	erase (iterator first, iterator last)
	Removes all the items from begin up to (but not including) end. More...
QTimerInfo * &	first ()
	Returns a reference to the first item in the list. More...
const QTimerInfo * &	first () const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
QTimerInfo * &	front ()
	This function is provided for STL compatibility. More...
const QTimerInfo * &	front () const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
int	indexOf (const QTimerInfo * &t, int from=0) const
	Returns the index position of the first occurrence of value in the list, searching forward from index position from. More...
void	insert (int i, const QTimerInfo * &t)
	Inserts value at index position i in the list. More...
iterator	insert (iterator before, const QTimerInfo * &t)
	Inserts value in front of the item pointed to by the iterator before. More...
bool	isDetached () const
bool	isEmpty () const
	Returns true if the list contains no items; otherwise returns false. More...
bool	isSharedWith (const QList< QTimerInfo * > &other) const
QTimerInfo * &	last ()
	Returns a reference to the last item in the list. More...
const QTimerInfo * &	last () const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
int	lastIndexOf (const QTimerInfo * &t, int from=-1) const
	Returns the index position of the last occurrence of value in the list, searching backward from index position from. More...
int	length () const
	This function is identical to count(). More...
QList< QTimerInfo * >	mid (int pos, int length=-1) const
	Returns a list whose elements are copied from this list, starting at position pos. More...
void	move (int from, int to)
	Moves the item at index position from to index position to. More...
bool	operator!= (const QList< QTimerInfo * > &l) const
	Returns true if other is not equal to this list; otherwise returns false. More...
QList< QTimerInfo * >	operator+ (const QList< QTimerInfo * > &l) const
	Returns a list that contains all the items in this list followed by all the items in the other list. More...
QList< QTimerInfo * > &	operator+= (const QList< QTimerInfo * > &l)
	Appends the items of the other list to this list and returns a reference to this list. More...
QList< QTimerInfo * > &	operator+= (const QTimerInfo * &t)
	Appends value to the list. More...
QList< QTimerInfo * > &	operator<< (const QList< QTimerInfo * > &l)
	Appends the items of the other list to this list and returns a reference to this list. More...
QList< QTimerInfo * > &	operator<< (const QTimerInfo * &t)
	Appends value to the list. More...
QList< QTimerInfo * > &	operator= (const QList< QTimerInfo * > &l)
	Assigns other to this list and returns a reference to this list. More...
bool	operator== (const QList< QTimerInfo * > &l) const
	Returns true if other is equal to this list; otherwise returns false. More...
const QTimerInfo * &	operator[] (int i) const
	Same as at(). More...
QTimerInfo * &	operator[] (int i)
	Returns the item at index position i as a modifiable reference. More...
void	pop_back ()
	This function is provided for STL compatibility. More...
void	pop_front ()
	This function is provided for STL compatibility. More...
void	prepend (const QTimerInfo * &t)
	Inserts value at the beginning of the list. More...
void	push_back (const QTimerInfo * &t)
	This function is provided for STL compatibility. More...
void	push_front (const QTimerInfo * &t)
	This function is provided for STL compatibility. More...
	QList ()
	Constructs an empty list. More...
	QList (const QList< QTimerInfo * > &l)
	Constructs a copy of other. More...
int	removeAll (const QTimerInfo * &t)
	Removes all occurrences of value in the list and returns the number of entries removed. More...
void	removeAt (int i)
	Removes the item at index position i. More...
void	removeFirst ()
	Removes the first item in the list. More...
void	removeLast ()
	Removes the last item in the list. More...
bool	removeOne (const QTimerInfo * &t)
	Removes the first occurrence of value in the list and returns true on success; otherwise returns false. More...
void	replace (int i, const QTimerInfo * &t)
	Replaces the item at index position i with value. More...
void	reserve (int size)
	Reserve space for alloc elements. More...
void	setSharable (bool sharable)
int	size () const
	Returns the number of items in the list. More...
bool	startsWith (const QTimerInfo * &t) const
	Returns true if this list is not empty and its first item is equal to value; otherwise returns false. More...
void	swap (QList< QTimerInfo * > &other)
	Swaps list other with this list. More...
void	swap (int i, int j)
	Exchange the item at index position i with the item at index position j. More...
QTimerInfo *	takeAt (int i)
	Removes the item at index position i and returns it. More...
QTimerInfo *	takeFirst ()
	Removes the first item in the list and returns it. More...
QTimerInfo *	takeLast ()
	Removes the last item in the list and returns it. More...
QSet< QTimerInfo * >	toSet () const
	Returns a QSet object with the data contained in this QList. More...
std::list< QTimerInfo * >	toStdList () const
	Returns a std::list object with the data contained in this QList. More...
QVector< QTimerInfo * >	toVector () const
	Returns a QVector object with the data contained in this QList. More...
QTimerInfo *	value (int i) const
	Returns the value at index position i in the list. More...
QTimerInfo *	value (int i, const QTimerInfo * &defaultValue) const
	If the index i is out of bounds, the function returns defaultValue. More...
	~QList ()
	Destroys the list. More...

Public Variables
timeval	currentTime
Public Variables inherited from QList< QTimerInfo *>
QListData::Data *	d
QListData	p

Properties
QTimerInfo *	firstTimerInfo

Additional Inherited Members
Public Types inherited from QList< QTimerInfo *>
typedef const value_type *	const_pointer
	Typedef for const T *. More...
typedef const value_type &	const_reference
	Typedef for const T &. More...
typedef const_iterator	ConstIterator
	Qt-style synonym for QList::const_iterator. More...
typedef qptrdiff	difference_type
	Typedef for ptrdiff_t. More...
typedef iterator	Iterator
	Qt-style synonym for QList::iterator. More...
typedef value_type *	pointer
	Typedef for T *. More...
typedef value_type &	reference
	Typedef for T &. More...
typedef int	size_type
	Typedef for int. More...
typedef QTimerInfo *	value_type
	Typedef for T. More...
Static Public Functions inherited from QList< QTimerInfo *>
static QList< QTimerInfo * >	fromSet (const QSet< QTimerInfo * > &set)
	Returns a QList object with the data contained in set. More...
static QList< QTimerInfo * >	fromStdList (const std::list< QTimerInfo * > &list)
	Returns a QList object with the data contained in list. More...
static QList< QTimerInfo * >	fromVector (const QVector< QTimerInfo * > &vector)
	Returns a QList object with the data contained in vector. More...
Related Functions inherited from QList< QTimerInfo *>
QDataStream &	operator<< (QDataStream &out, const QList< QTimerInfo * > &list)
	Writes the list list to stream out. More...
QDataStream &	operator>> (QDataStream &in, QList< QTimerInfo * > &list)
	Reads a list from stream in into list. More...

Detailed Description

Definition at line 81 of file qeventdispatcher_unix_p.h.

Constructors and Destructors

QTimerInfoList()

QTimerInfoList::QTimerInfoList

(

)

Definition at line 328 of file qeventdispatcher_unix.cpp.

{
#if (_POSIX_MONOTONIC_CLOCK-0 <= 0) && !defined(Q_OS_MAC) && !defined(Q_OS_NACL)
    if (!QElapsedTimer::isMonotonic()) {
        // not using monotonic timers, initialize the timeChanged() machinery
        previousTime = qt_gettime();

        tms unused;
        previousTicks = times(&unused);

        ticksPerSecond = sysconf(_SC_CLK_TCK);
        msPerTick = 1000/ticksPerSecond;
    } else {
        // detected monotonic timers
        previousTime.tv_sec = previousTime.tv_usec = 0;
        previousTicks = 0;
        ticksPerSecond = 0;
        msPerTick = 0;
    }
#endif

    firstTimerInfo = 0;
}

Functions

activateTimers()

int QTimerInfoList::activateTimers

(

)

Definition at line 565 of file qeventdispatcher_unix.cpp.

{
    if (qt_disable_lowpriority_timers || isEmpty())
        return 0; // nothing to do

    int n_act = 0, maxCount = 0;
    firstTimerInfo = 0;

    timeval currentTime = updateCurrentTime();
    repairTimersIfNeeded();


    // Find out how many timer have expired
    for (QTimerInfoList::const_iterator it = constBegin(); it != constEnd(); ++it) {
        if (currentTime < (*it)->timeout)
            break;
        maxCount++;
    }

    //fire the timers.
    while (maxCount--) {
        if (isEmpty())
            break;

        QTimerInfo *currentTimerInfo = first();
        if (currentTime < currentTimerInfo->timeout)
            break; // no timer has expired

        if (!firstTimerInfo) {
            firstTimerInfo = currentTimerInfo;
        } else if (firstTimerInfo == currentTimerInfo) {
            // avoid sending the same timer multiple times
            break;
        } else if (currentTimerInfo->interval <  firstTimerInfo->interval
                   || currentTimerInfo->interval == firstTimerInfo->interval) {
            firstTimerInfo = currentTimerInfo;
        }

        // remove from list
        removeFirst();

        // determine next timeout time
        currentTimerInfo->timeout += currentTimerInfo->interval;
        if (currentTimerInfo->timeout < currentTime)
            currentTimerInfo->timeout = currentTime + currentTimerInfo->interval;

        // reinsert timer
        timerInsert(currentTimerInfo);
        if (currentTimerInfo->interval.tv_usec > 0 || currentTimerInfo->interval.tv_sec > 0)
            n_act++;

        if (!currentTimerInfo->activateRef) {
            // send event, but don't allow it to recurse
            currentTimerInfo->activateRef = &currentTimerInfo;

            QTimerEvent e(currentTimerInfo->id);
            QCoreApplication::sendEvent(currentTimerInfo->obj, &e);

            if (currentTimerInfo)
                currentTimerInfo->activateRef = 0;
        }
    }

    firstTimerInfo = 0;
    return n_act;
}

registeredTimers()

QList< QPair< int, int > > QTimerInfoList::registeredTimers

(

QObject *

object

)

const

Definition at line 551 of file qeventdispatcher_unix.cpp.

{
    QList<QPair<int, int> > list;
    for (int i = 0; i < count(); ++i) {
        register const QTimerInfo * const t = at(i);
        if (t->obj == object)
            list << QPair<int, int>(t->id, t->interval.tv_sec * 1000 + t->interval.tv_usec / 1000);
    }
    return list;
}

registerTimer()

void QTimerInfoList::registerTimer	(	int	timerId,
		int	interval,
		QObject *	object
	)

Definition at line 487 of file qeventdispatcher_unix.cpp.

{
    QTimerInfo *t = new QTimerInfo;
    t->id = timerId;
    t->interval.tv_sec  = interval / 1000;
    t->interval.tv_usec = (interval % 1000) * 1000;
    t->timeout = updateCurrentTime() + t->interval;
    t->obj = object;
    t->activateRef = 0;

    timerInsert(t);
}

repairTimersIfNeeded()

void QTimerInfoList::repairTimersIfNeeded

(

)

Definition at line 422 of file qeventdispatcher_unix.cpp.

Referenced by updateCurrentTime().

{
}

timerInsert()

void QTimerInfoList::timerInsert

(

QTimerInfo *

ti

)

Definition at line 431 of file qeventdispatcher_unix.cpp.

{
    int index = size();
    while (index--) {
        register const QTimerInfo * const t = at(index);
        if (!(ti->timeout < t->timeout))
            break;
    }
    insert(index+1, ti);
}

timerRepair()

void QTimerInfoList::timerRepair

(

const timeval &

diff

)

Definition at line 445 of file qeventdispatcher_unix.cpp.

{
    // repair all timers
    for (int i = 0; i < size(); ++i) {
        register QTimerInfo *t = at(i);
        t->timeout = t->timeout + diff;
    }
}

timerWait()

bool QTimerInfoList::timerWait

(

timeval &

tm

)

Definition at line 458 of file qeventdispatcher_unix.cpp.

Referenced by timerSourcePrepareHelper().

{
    timeval currentTime = updateCurrentTime();
    repairTimersIfNeeded();

    // Find first waiting timer not already active
    QTimerInfo *t = 0;
    for (QTimerInfoList::const_iterator it = constBegin(); it != constEnd(); ++it) {
        if (!(*it)->activateRef) {
            t = *it;
            break;
        }
    }

    if (!t)
      return false;

    if (currentTime < t->timeout) {
        // time to wait
        tm = t->timeout - currentTime;
    } else {
        // no time to wait
        tm.tv_sec  = 0;
        tm.tv_usec = 0;
    }

    return true;
}

unregisterTimer()

bool QTimerInfoList::unregisterTimer

(

int

timerId

)

Definition at line 500 of file qeventdispatcher_unix.cpp.

{
    // set timer inactive
    for (int i = 0; i < count(); ++i) {
        register QTimerInfo *t = at(i);
        if (t->id == timerId) {
            // found it
            removeAt(i);
            if (t == firstTimerInfo)
                firstTimerInfo = 0;
            if (t->activateRef)
                *(t->activateRef) = 0;

            // release the timer id
            if (!QObjectPrivate::get(t->obj)->inThreadChangeEvent)
                QAbstractEventDispatcherPrivate::releaseTimerId(timerId);

            delete t;
            return true;
        }
    }
    // id not found
    return false;
}

unregisterTimers()

bool QTimerInfoList::unregisterTimers

(

QObject *

object

)

Definition at line 525 of file qeventdispatcher_unix.cpp.

{
    if (isEmpty())
        return false;
    for (int i = 0; i < count(); ++i) {
        register QTimerInfo *t = at(i);
        if (t->obj == object) {
            // object found
            removeAt(i);
            if (t == firstTimerInfo)
                firstTimerInfo = 0;
            if (t->activateRef)
                *(t->activateRef) = 0;

            // release the timer id
            if (!QObjectPrivate::get(t->obj)->inThreadChangeEvent)
                QAbstractEventDispatcherPrivate::releaseTimerId(t->id);

            delete t;
            // move back one so that we don't skip the new current item
            --i;
        }
    }
    return true;
}

updateCurrentTime()

timeval QTimerInfoList::updateCurrentTime

(

)

Definition at line 352 of file qeventdispatcher_unix.cpp.

Referenced by QEventDispatcherUNIXPrivate::doSelect(), and timerSourceCheckHelper().

{
    return (currentTime = qt_gettime());
}

Properties

currentTime

timeval QTimerInfoList::currentTime

Definition at line 98 of file qeventdispatcher_unix_p.h.

firstTimerInfo

QTimerInfo* QTimerInfoList::firstTimerInfo

private

Definition at line 93 of file qeventdispatcher_unix_p.h.

---

The documentation for this class was generated from the following files:

• /src/corelib/kernel/qeventdispatcher_unix_p.h
• /src/corelib/kernel/qeventdispatcher_unix.cpp