[Development] QSystemAlignedTimer to QtCore

[shane.kearns at accenture.com]

It should be used to extend the QTimer API.
Where the system doesn't support this kind of timer, then the in process solution as in Thiago's blog should be used.

Should there be a preferred interval?
For some use cases, the timer is allowed to be late but not early (e.g. supervisory timeouts) in which case preferred == minimum
Whereas for other use cases, the timer is allowed to be late or early

Out of interest, which platforms support this kind of timer? (other than symbian which isn't supported by Qt5)

Finally, when this functionality is in QtCore, then the QSystemInfo API should be replaced with a shim over the QtCore implementation.
I.E. implement a backend that uses the QTimer API and remove any OS specific backends, and mark the API as deprecated.

> -----Original Message-----
> From: development-bounces+shane.kearns=accenture.com at qt-project.org
> [mailto:development-bounces+shane.kearns=accenture.com at qt-project.org]
> On Behalf Of xizhi.zhu at nokia.com
> Sent: Monday, November 21, 2011 10:06
> To: development at qt-project.org
> Subject: [Development] RFC: QSystemAlignedTimer to QtCore
>
> Hi,
>
> In QtMobility SystemInfo, we have a QSystemAlignedTimer:
> http://doc.qt.nokia.com/qtmobility-latest/qsystemalignedtimer.html
>
> In short, it's a system-wide fuzzy timer, providing a service for
> applications to synchronize their activity.
>
> Now I'm thinking of move it to QtCore, and preferably merge it into
> QTimer. If so, we probably need to add some interface to specify the
> precision, other than simply tell the type as in [1].
> Any thoughts?
>
>
> [1] http://codereview.qt-project.org/#change,657
>
> ================
> Xizhi Zhu (Steven)
>
> Software Engineer @ Qt Development Frameworks
> Nokia
>
> Mobile: +358 (0)50 480 1247
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> Development at qt-project.org
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