CFPlugIn_Instance.c

   1 /*
   2  * Copyright (c) 2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*      CFPlugIn_Instance.c
  25         Copyright (c) 1999-2011, Apple Inc.  All rights reserved.
  26         Responsibility: David Smith
  27 */
  28
  29 #include "CFBundle_Internal.h"
  30 #include "CFInternal.h"
  31
  32 static CFTypeID __kCFPlugInInstanceTypeID = _kCFRuntimeNotATypeID;
  33
  34 struct __CFPlugInInstance {
  35     CFRuntimeBase _base;
  36
  37     _CFPFactory *factory;
  38
  39     CFPlugInInstanceGetInterfaceFunction getInterfaceFunction;
  40     CFPlugInInstanceDeallocateInstanceDataFunction deallocateInstanceDataFunction;
  41
  42 #ifdef _MSC_VER
  43 #pragma warning(push)
  44 #pragma warning(disable : 4200)
  45 #endif //_MSC_VER
  46     uint8_t _instanceData[0];
  47 #ifdef _MSC_VER
  48 #pragma warning(pop)
  49 #endif //_MSC_VER
  50 };
  51
  52 static CFStringRef __CFPlugInInstanceCopyDescription(CFTypeRef cf) {
  53     /* MF:!!! Implement me */
  54     return CFSTR("Some CFPlugInInstance");
  55 }
  56
  57 static void __CFPlugInInstanceDeallocate(CFTypeRef cf) {
  58     CFPlugInInstanceRef instance = (CFPlugInInstanceRef)cf;
  59
  60     __CFGenericValidateType(cf, __kCFPlugInInstanceTypeID);
  61
  62     if (instance->deallocateInstanceDataFunction) {
  63         FAULT_CALLBACK((void **)&(instance->deallocateInstanceDataFunction));
  64         (void)INVOKE_CALLBACK1(instance->deallocateInstanceDataFunction, (void *)(&instance->_instanceData[0]));
  65     }
  66
  67     if (instance->factory) _CFPFactoryRemoveInstance(instance->factory);
  68 }
  69
  70 static const CFRuntimeClass __CFPlugInInstanceClass = {
  71     0,
  72     "CFPlugInInstance",
  73     NULL,      // init
  74     NULL,      // copy
  75     __CFPlugInInstanceDeallocate,
  76     NULL,      // equal
  77     NULL,      // hash
  78     NULL,      //
  79     __CFPlugInInstanceCopyDescription
  80 };
  81
  82 __private_extern__ void __CFPlugInInstanceInitialize(void) {
  83     __kCFPlugInInstanceTypeID = _CFRuntimeRegisterClass(&__CFPlugInInstanceClass);
  84 }
  85
  86 CFTypeID CFPlugInInstanceGetTypeID(void) {
  87     return __kCFPlugInInstanceTypeID;
  88 }
  89
  90 CF_EXPORT CFPlugInInstanceRef CFPlugInInstanceCreateWithInstanceDataSize(CFAllocatorRef allocator, CFIndex instanceDataSize, CFPlugInInstanceDeallocateInstanceDataFunction deallocateInstanceFunction, CFStringRef factoryName, CFPlugInInstanceGetInterfaceFunction getInterfaceFunction) {
  91     CFPlugInInstanceRef instance;
  92     UInt32 size;
  93     size = sizeof(struct __CFPlugInInstance) + instanceDataSize - sizeof(CFRuntimeBase);
  94     instance = (CFPlugInInstanceRef)_CFRuntimeCreateInstance(allocator, __kCFPlugInInstanceTypeID, size, NULL);
  95     if (!instance) return NULL;
  96
  97     instance->factory = _CFPFactoryFind((CFUUIDRef)factoryName, true);
  98     if (instance->factory) _CFPFactoryAddInstance(instance->factory);
  99     instance->getInterfaceFunction = getInterfaceFunction;
 100     instance->deallocateInstanceDataFunction = deallocateInstanceFunction;
 101
 102     return instance;
 103 }
 104
 105 CF_EXPORT Boolean CFPlugInInstanceGetInterfaceFunctionTable(CFPlugInInstanceRef instance, CFStringRef interfaceName, void **ftbl) {
 106     void *myFtbl;
 107     Boolean result = false;
 108
 109     if (instance->getInterfaceFunction) {
 110         FAULT_CALLBACK((void **)&(instance->getInterfaceFunction));
 111         result = INVOKE_CALLBACK3(instance->getInterfaceFunction, instance, interfaceName, &myFtbl) ? true : false;
 112     }
 113     if (ftbl) *ftbl = (result ? myFtbl : NULL);
 114     return result;
 115 }
 116
 117 CF_EXPORT CFStringRef CFPlugInInstanceGetFactoryName(CFPlugInInstanceRef instance) {
 118     return (CFStringRef)_CFPFactoryGetFactoryID(instance->factory);
 119 }
 120
 121 CF_EXPORT void *CFPlugInInstanceGetInstanceData(CFPlugInInstanceRef instance) {
 122     return (void *)(&instance->_instanceData[0]);
 123 }
 124