qatomic.h File Reference

#include <QtCore/qglobal.h>
#include <QtCore/qbasicatomic.h>

Go to the source code of this file.

Classes
class	QAtomicInt
class	QAtomicPointer< T >
Functions
template<typename T >
void	qAtomicAssign (T *&d, T *x)
	This is a helper for the assignment operators of implicitly shared classes.
template<typename T >
void	qAtomicDetach (T *&d)
	This is a helper for the detach method of implicitly shared classes.

---

Function Documentation

void qAtomicAssign	(	T *&	d,
		T *	x
	)		[inline]

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This is a helper for the assignment operators of implicitly shared classes.

Your assignment operator should look like this:

doc/src/snippets/code/src.corelib.thread.qatomic.h 0

Definition at line 195 of file qatomic.h.

{
    if (d == x)
        return;
    x->ref.ref();
    if (!d->ref.deref())
        delete d;
    d = x;
}

void qAtomicDetach

(

T *&

d

)

[inline]

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This is a helper for the detach method of implicitly shared classes.

Your private class needs a copy constructor which copies the members and sets the refcount to 1. After that, your detach function should look like this:

doc/src/snippets/code/src.corelib.thread.qatomic.h 1

Definition at line 214 of file qatomic.h.

{
    if (d->ref == 1)
        return;
    T *x = d;
    d = new T(*d);
    if (!x->ref.deref())
        delete x;
}