Sample code for handleMachMessage (NSMachPort)?
Sample code for handleMachMessage (NSMachPort)?
- Subject: Sample code for handleMachMessage (NSMachPort)?
- From: Greg Hurrell <email@hidden>
- Date: Mon, 2 Jun 2003 01:20:25 +0930
Does anyone have any sample code at all for how one would go about
processing an incoming mach message using the handleMachMessage
delegate method in NSMachPort?
The docs say:
handleMachMessage:
- (void) handleMachMessage: (void *) machMessage
Processes machMessage , an incoming Mach message cast as a pointer to
void. The delegate should interpret this data as a pointer to a Mach
message beginning with a msg_header_t structure and should handle the
message appropriately.
(
http://developer.apple.com/techpubs/macosx/Cocoa/Reference/Foundation/
ObjC_classic/Classes/NSMachPort.html)
I cannot find the msg_header_t structure definition anywhere, although
I can see there is a mach_msg_header_t structure defined in
/usr/include/mach/message.h.
Not even sure if this is the appropriate structure to use, but in any
case I can't find any sample code for dealing with it. Doing a search
in the usual places (google.com, groups.google.com, cocoadev.com,
cocoa.mamasam.com etc) yields pretty much nothing...
The one bit of sample code I can find on Apple's site is this:
http://developer.apple.com/techpubs/macosx/Cocoa/TasksAndConcepts/
ProgrammingTopics/Notifications/Tasks/Threading.html
Ironically, the implementation of handleMachMessage in their code
ignores the content of the message....
This question was asked on the list once before
(
http://cocoa.mamasam.com/COCOADEV/2001/12/1/18964.php) but the answer
doesn't provide any sample code relevant to the processing of the
msg_header_t structure.
(Could you please cc replies to me separately as well, in case I miss
them among all the other postings to the list... thanks...)
In the meantime, I'm back off to google to learn more about Mach
messaging!.... :-)
Best wishes,
Greg
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