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POHow do I get an Mac OS Component Manager Component to be visible to other processes?
 

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  1. POHow do I get an Mac OS Component Manager Component to be visible to other processes?
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    <p>This is a bit esoteric, but there have to be a few people here who know how OS X's Carbon Component Manager works. I've made a couple of little apps to play around with making Components (see <a href="http://developer.apple.com/mac/library/DOCUMENTATION/Carbon/Reference/Component_Manager/Reference/reference.html" rel="nofollow noreferrer">here</a> for some background). Actually, one of the apps is a sample program straight from Apple called 'Fiendishthngs'. It lists all the Components that the Component Manager is making available. My program is a simple little thing that registers a Component, lists all the Components that the Component Manager has, and then waits around indefinately (to avoid purging the Component that it registered).</p> <p>On my system, the Component Manager is tracking 873 Components (mostly codecs of one sort of another). My program that registers a Component registers it, and then counts 874 Components because it just registered one itself, of course). Here's the source:</p> <pre><code>void RegisterBasicComponent() { ComponentDescription desc; desc.componentType = kMyComponentType; desc.componentSubType = kMyComponentSubType; desc.componentManufacturer = kMyComponentManufacturer; desc.componentFlags = 0; desc.componentFlagsMask = cmpIsMissing; ComponentRoutineUPP MyComponentRoutineUPP = NewComponentRoutineUPP( &amp;MyComponentRoutineProc ); // Handle name_handle = NewHandle( sizeof( kMyComponentName ) ); //strcpy( *(char**)name_handle, kMyComponentName ); //RegisterComponent( &amp;desc, MyComponentRoutineUPP, registerComponentGlobal, name_handle, NULL, NULL ); Component component = RegisterComponent( &amp;desc, MyComponentRoutineUPP, registerComponentGlobal, NULL, NULL, NULL ); if ( NULL != component ) printf("The registration seems to have worked!\n"); else printf("Nope - didn't work for some reason.\n"); } int main( void ) { RegisterBasicComponent(); ComponentDescription looking; // OSType componentType; /* A unique 4-byte code indentifying the command set */ // OSType componentSubType; /* Particular flavor of this instance */ // OSType componentManufacturer; /* Vendor indentification */ // UInt32 componentFlags; /* 8 each for Component,Type,SubType,Manuf/revision */ // UInt32 componentFlagsMask; /* Mask for specifying which flags to consider in search, zero during registration */ looking.componentType = kAnyComponentType; looking.componentSubType = kAnyComponentSubType; // looking.componentSubType = kComponentResourceType looking.componentManufacturer = kAnyComponentManufacturer; looking.componentFlags = 0; looking.componentFlagsMask = cmpIsMissing; long numComponents = CountComponents ( &amp;looking ); printf("Found %ld components.\n", numComponents); Component component = 0; int i = 0; while (true) { component = FindNextComponent(component, &amp;looking); if ( 0 == component ) break; ComponentDescription desc; Handle componentName = NewHandle(256); Handle componentInfo = NewHandle(1024); Handle componentIcon = 0; OSErr err = GetComponentInfo( component, &amp;desc, componentName, componentInfo, componentIcon ); if ( err != noErr ) { printf("Couldn't find any info on component %d of %ld in list!\n", i , numComponents); break; } printf( "%d of %ld: '%c%c%c%c', '%c%c%c%c', '%c%c%c%c', '%s'\n", i, numComponents, SPLAT_WORD( desc.componentManufacturer ), SPLAT_WORD( desc.componentType ), SPLAT_WORD( desc.componentSubType ), *componentName ); RecoverHandle( *componentName ); RecoverHandle( *componentInfo ); ++i; } while (true) { printf("Waiting around for someone to use me...\n"); sleep( 3 ); } } </code></pre> <p>Anyways, when I run this, keep it running (so the Component would presumably stay registered with the Component Manager), and then run Fiendishthngs, Fiendishthngs can't see my test Component that I register - it only sees 873 Components. The 'registerComponentGlobal' flag passed into RegisterComponent() is supposed to make the Component available to other processes, but it seems like something is going awry.</p> <p>Any ideas?</p>
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