Le 4 déc. 08 à 15:17, Påhl Melin a écrit :
2008/12/4 Jean-Daniel Dupas <[EMAIL PROTECTED]>:
If you want to avoid Cocoa, Cocoa-dev is probably not the best
mailing list
to ask.
You will have more chance on darwin-dev.
I don't want to avoid Cocoa, but I just haven't found any Cocoa class
that supports timers without a run loop. But maybe I need to switch to
darwin-dev.
What do you mean by "low-leve" ? What prevent you to use NS classes ?
Is this contraint preventing you to use CoreFoundation ? (which is
low-level IMHO).
Nothing prevents me from using NS classes per se. I will use the
timers in a C++ class and want to get a callback to a normal
function—not calling a selector on an Objective-C class that most NS
classes would do. And since it's supposed to be the lowest level of my
architecture I want it to be as efficient as possible.
The only problem I have is that I will run the timers on threads
without run loops so both NSTimer and CFRunLoopTimer (I didn't find
any reference information about CFTimer on ADC) are impossible to use.
Of course, CFTimer was a shortened form for CFRunLoopTimer.
If you use timer, you need some primitive function that waits until
one timer "trigger". I don't understand what is the difference between
waiting using select, kevent,
or any other primitive and waiting using CFRunLoopRun(). All threads
have a runloop (or create one when needed), so I really don't
understand what is the problem here.
For kevent, I'm surprised the doc say so, it look like it is
implemented (at least in 10.4.11 and 10.5 XNU sources).
If you want lower level primitive, you can use kevent's timers, or
if you
want really low-level, there is a mach timer API, but I don't think
it is
considere public as the header cannot be found in /usr/include/mach
In the man page for kevent it says that kevent timers are not
supported ("EVFILT_TIMER This filter is currently unsupported."). I
just assumed that the man page was correct and haven't made any tests.
Are you sure kevent timers are implemented in Mac OS X? When it comes
to Mach timers I wouldn't dare to use that in a commercial product
since Apple seems to ask developers to keep away from Mach.
Anyway, that's the API used in CoreFoundation for CFTimer and
declared in
mk_timer.h (see XNU sources for details). But I wont go this way in a
shipping product.
Agree... I will keep away from any private API:s.
/ Påhl
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