static kern_return_t
IOFindPlugIns( io_service_t service,
CFUUIDRef pluginType,
CFArrayRef * factories, CFArrayRef * plists )
{
CFURLRef url;
CFPlugInRef onePlugin;
CFBundleRef bundle;
CFDictionaryRef plist;
CFDictionaryRef matching;
CFDictionaryRef pluginTypes;
CFMutableStringRef path;
LookUUIDContext context;
CFStringRef pluginName;
boolean_t matches;
kern_return_t kr = kIOReturnSuccess;
// -- loadables
onePlugin = NULL;
pluginName = NULL;
path = NULL;
url = NULL;
do {
pluginTypes = IORegistryEntryCreateCFProperty( service, CFSTR(kIOCFPlugInTypesKey),
kCFAllocatorDefault, kNilOptions );
if( !pluginTypes )
continue;
// look up UUID key this way - otherwise string case matters
// CFShow( pluginTypes );
context.key = pluginType;
context.result = 0;
CFDictionaryApplyFunction( pluginTypes, &_IOGetWithUUIDKey, &context);
pluginName = (CFStringRef) context.result;
if( !pluginName)
continue;
path = CFStringCreateMutable( kCFAllocatorDefault, 0 );
if( !path)
continue;
CFStringAppendCString(path,
"/System/Library/Extensions/",
kCFStringEncodingMacRoman);
CFStringAppend(path, pluginName);
url = CFURLCreateWithFileSystemPath(NULL, path,
kCFURLPOSIXPathStyle, TRUE);
if( !url)
continue;
onePlugin = CFPlugInCreate(NULL, url);
} while( false );
// if (pluginName && (!onePlugin))
// printf("Could not create CFPluginRef.\n");
if( url)
CFRelease( url );
if( path)
CFRelease( path );
if( pluginTypes )
CFRelease( pluginTypes );
// --
if( onePlugin
&& (bundle = CFPlugInGetBundle(onePlugin))
&& (plist = CFBundleGetInfoDictionary(bundle))
&& (matching = (CFDictionaryRef)
CFDictionaryGetValue(plist, CFSTR("Personality")))) {
kr = IOServiceMatchPropertyTable( service, matching, &matches);
if( kr != kIOReturnSuccess)
matches = FALSE;
} else
matches = TRUE;
if( matches) {
if( onePlugin)
*factories = CFPlugInFindFactoriesForPlugInTypeInPlugIn(pluginType, onePlugin);
else
*factories = 0;//CFPlugInFindFactoriesForPlugInType(pluginType);
} else
*factories = 0;
*plists = 0;
return( kr );
}
static CFPlugInRef MyLoadPlugIn( void )
{
CFPlugInRef newPlugIn;
CFURLRef bundleURL;
CFURLRef plugInURL;
Boolean foundInterface = false;
// Obtain a URL to the PlugIns directory inside our application.
bundleURL = CFBundleCopyBuiltInPlugInsURL( CFBundleGetMainBundle() );
// We just want to load our test plug-in, so append its name to the URL.
plugInURL = CFURLCreateCopyAppendingPathComponent( NULL, bundleURL, CFSTR( kPlugInName ), FALSE );
// Create a CFPlugin using the URL. This step causes the plug-in's types and factories to
// be registered with the system. Note that the plug-in's code is not actually loaded at
// this stage unless the plug-in is using dynamic registration.
newPlugIn = CFPlugInCreate( NULL, plugInURL );
CFRelease( bundleURL );
CFRelease( plugInURL );
// The plug-in was located. Now locate the interface.
if( newPlugIn )
{
CFArrayRef factories;
// See if this plug-in implements the Test type.
factories = CFPlugInFindFactoriesForPlugInTypeInPlugIn( kTestTypeID, newPlugIn );
// If there are factories for the Test type, attempt to get the IUnknown interface.
if ( factories != NULL )
{
CFIndex factoryCount;
CFIndex index;
factoryCount = CFArrayGetCount( factories );
if ( factoryCount > 0 )
{
for ( index = 0 ; (index < factoryCount) && (foundInterface == false) ; index++ )
{
CFUUIDRef factoryID;
// Get the factory ID for the first location in the array of IDs.
factoryID = (CFUUIDRef) CFArrayGetValueAtIndex( factories, index );
if ( factoryID )
{
IUnknownVTbl **iunknown;
// Use the factory ID to get an IUnknown interface. Here the plug-in code is loaded.
iunknown = (IUnknownVTbl **) CFPlugInInstanceCreate( NULL, factoryID, kTestTypeID );
if ( iunknown )
{
// If this is an IUnknown interface, query for the test interface.
(*iunknown)->QueryInterface( iunknown, CFUUIDGetUUIDBytes( kTestInterfaceID ), (LPVOID *)( &gDrawBallInterface ) );
// Now we are done with IUnknown
(*iunknown)->Release( iunknown );
if ( gDrawBallInterface )
{
// We found the interface we need
foundInterface = true;
}
}
}
}
}
}
CFRelease( factories );
}
if ( foundInterface == false )
{
CFRelease( newPlugIn );
newPlugIn = NULL;
}
return( newPlugIn );
}
