On 11 Jul 2009, at 00:33, Julien Isorce wrote:
Hi,
First, thx for your reply.
2009/7/10 Scott Thompson <ea...@mac.com>
On Jul 10, 2009, at 3:40 PM, Julien Isorce wrote:
In GNUstep it's possible to decide which pthread is the "main
thread".
I mean the first pthread which call GSRegisterCurrentThread, is
the main
thread.
And then the NSApp must be init and run in this main thread, as it's
required on MacOSX.
Is it possible to change the "main thread" as far as Cocoa is
concerned,
on
MacOSX ? (something like GSRegisterCurrentThread)
What is the point of such a routine?
Suppose that the application starts and we give the main thread the
label
"Thread A". You spin up an new thread that we will give the label
"Thread
B. You then use your routine to make the thread with the label
"Thread B"
to be the main thread. Now the main thread has a "Thread B" sign
and there
is another thread with a "Thread A" sign hanging off of it.
How is this different than if you had simply started the
application gave
the the main thread the label "Thread B", then started a new thread
and gave
it the label "Thread A"?
sure but in the previous mails I tried to explain that I am making a
plugin
(which consists of a dynamic library) of a program which I have not
the
source code.
So in your example, the difference is that I can run the NSApp in
the main
thread (Thread B).
And it's usefull because I have no access to the thread A.
With GNUstep Cocoa, in the plugin I create a pthread (thread B) and
then I
am registering it to be the main thread. Then I am running NSApp in
there.
In this way no performInMainThreads are borken, and it's a solution
to my
problem.
It's still not clear what your problem is.
What exactly is it that are you trying to do on Mac OS X? What is
the
environment in which your code is running and what effect are you
trying to
achieve?
The only guess I can make is that you are trying to create a plugin
for
something like the GIMP and you want to use Cocoa from that plugin.
yup something like that.
There may be a way to solve your problem properly in Mac OS X,
I experimented on MacOSX and it seems that a pthread (I mean a thread
created using native C api) is automatically converted to a NSThread
so it's
cool. (whereas on GNUstep I have to call GSRegisterCurrentThread)
So the final question: is there a way to make [NSThread
isMainThread] return
YES in a thread different that the main thread of a process, on
MacOSX ?
But as has already been pointed out, consider the wider implications
of this. If somebody else wrote a plug-in using the same technique,
there would be two plug-ins contending for the definition of "the main
thread." This alone should be reason enough why Cocoa does not offer
such an API (or at least that I am aware of)
Mike.
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