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Re: SystemConfiguration framework and Carbon CFM - continued

Subject: Re: SystemConfiguration framework and Carbon CFM - continued
From: Quinn <email@hidden>
Date: Wed, 22 Jun 2005 17:39:18 +0100
Delivered-to: email@hidden
Delivered-to: email@hidden

At 19:17 +0400 22/6/05, Igor Garnov wrote:

Where did I go wrong?

Did you do anything special to the function pointer that you supply when you register the callback associated with the runloop source. You will need to. SCF expects the callback to be a Mach-O-style callback (a pointer to code), which CFM function pointers aren't (they're a pointer to a TVector). Check out the CFM_MachO_CFM sample on our web site for the standard technique for handling this.

<http://developer.apple.com/samplecode/CFM_MachO_CFM/CFM_MachO_CFM.html>

Meanwhile, when it comes to variables residing in SCF, I do the following - is this right?

if ( bJaguarAndLater ) { _kSCDynamicStoreDomainState = ( CFStringRef )CFBundleGetDataPointerForName( cfBundle, CFSTR( "kSCDynamicStoreDomainState" ) ); _kSCCompAnyRegex = ( CFStringRef )CFBundleGetDataPointerForName( cfBundle, CFSTR( "kSCCompAnyRegex" ) ); _kSCEntNetIPv4 = ( CFStringRef )CFBundleGetDataPointerForName( cfBundle, CFSTR( "kSCEntNetIPv4" ) ); } else { _kSCDynamicStoreDomainState = CFSTR( "State:" ); _kSCCompAnyRegex = CFSTR( "[^/]+" ); _kSCEntNetIPv4 = CFSTR( "IPv4" ); }

As a rule I recommend that you don't test version numbers. Rather, just get the pointer and, if it's NULL, replace it with a constant string. For example:

_kSCDynamicStoreDomainState = ( CFStringRef )CFBundleGetDataPointerForName( cfBundle, CFSTR( "kSCDynamicStoreDomainState" ) ); if (_kSCDynamicStoreDomainState == NULL) { _kSCDynamicStoreDomainState = CFSTR( "State:" ); }

S+E
--
Quinn "The Eskimo!"                    <http://www.apple.com/developer/>
Apple Developer Technical Support * Networking, Communications, Hardware
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References:
	>SystemConfiguration framework and Carbon CFM - continued (From: Igor Garnov <email@hidden>)

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