Hi Steven,
Here is a correct snippet that works with the exact same bridgesupport file:
framework 'Carbon'
load_bridge_support_file('b.bridgesupport')
ptr = Pointer.new("{ProcessSerialNumber=II}")
GetCurrentProcess(ptr)
p ptr[0].lowLongOfPSN
The idea is that you want to pass a pointer to the structure, and not the
sctructure itself to GetCurrentProcess :-)
You can, as you said, do (almost) the same with Cocoa:
framework "AppKit"
info = NSWorkspace.sharedWorkspace.activeApplication
puts "Serial # Low : " + info["NSApplicationProcessSerialNumberLow"].to_s
puts "Serial # High: " + info["NSApplicationProcessSerialNumberHigh"].to_s
However, please note that this will get the current **application** PSN, which,
in case you run the script in Terminal, will be Terminal's PSN, not MacRuby's.
--
Thibault Martin-Lagardette
On Aug 25, 2010, at 18:20, Steven Parkes wrote:
>> Hope this helps :-)
>
> Yup. I'm getting the hang of bridgesupport (coming from an MRI FFI world ...)
>
> Any obvious reason why this doesn't seem to work?
>
> <?xml version='1.0'?>
> <!DOCTYPE signatures SYSTEM
> "file://localhost/System/Library/DTDs/BridgeSupport.dtd ">
> <signatures version='0.9'>
> <struct name='ProcessSerialNumber'
> type='{ProcessSerialNumber="highLongOfPSN"I"lowLongOfPSN"I}' />
> <function name='GetCurrentProcess'>
> <reval type='s' />
> <arg type='^{ProcessSerialNumber=II}' type_modifier='o' />
> </function>
> </signatures>
>
> load_bridge_support_file(...)
> psn = ProcessSerialNumber.new
> GetCurrentProcess(psn)
> p psn
>
> I don't see the member values getting set the way I expect: they come back as
> zero, which isn't right. I can see it making the call in gdb and 'o' seems
> right by the other examples, but?
>
> I know (think?) I can get this information from NSWorkspace ... this was more
> to test my understanding and prove I could the values back I expect ... but I
> don't seem to be able to ...
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