CFPlugIn_Factory.c

   1 /*
   2  * Copyright (c) 2015 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_Factory.c
  25         Copyright (c) 1999-2014, Apple Inc.  All rights reserved.
  26         Responsibility: Tony Parker
  27 */
  28
  29 #include "CFBundle_Internal.h"
  30 #include "CFInternal.h"
  31
  32 static CFTypeID __kCFPFactoryTypeID = _kCFRuntimeNotATypeID;
  33
  34 struct __CFPFactory {
  35     CFRuntimeBase _base;
  36
  37     CFUUIDRef _uuid;
  38     Boolean _enabled;
  39     char _padding[3];
  40
  41     CFPlugInFactoryFunction _func;
  42
  43     CFPlugInRef _plugIn;
  44     CFStringRef _funcName;
  45
  46     CFMutableArrayRef _types;
  47     CFLock_t _lock;
  48 };
  49
  50 static void _CFPFactoryDeallocate(CFTypeRef factory);
  51
  52 static const CFRuntimeClass __CFPFactoryClass = {
  53     0,
  54     "_CFPFactory",
  55     NULL,       // init
  56     NULL,       // copy
  57     _CFPFactoryDeallocate,
  58     NULL,       // equal
  59     NULL,       // hash
  60     NULL,       // formatting desc
  61     NULL,       // debug desc
  62 };
  63
  64 CF_PRIVATE void __CFPFactoryInitialize(void) {
  65     static dispatch_once_t initOnce;
  66     dispatch_once(&initOnce, ^{ __kCFPFactoryTypeID = _CFRuntimeRegisterClass(&__CFPFactoryClass); });
  67 }
  68
  69 static CFTypeID _CFPFactoryGetTypeID(void) {
  70     return __kCFPFactoryTypeID;
  71 }
  72
  73 static CFLock_t CFPlugInGlobalDataLock = CFLockInit;
  74 static CFMutableDictionaryRef _factoriesByFactoryID = NULL; /* Value is _CFPFactoryRef */
  75 static CFMutableDictionaryRef _factoriesByTypeID = NULL; /* Value is array of _CFPFactoryRef */
  76
  77 static void _CFPFactoryAddToTable(_CFPFactoryRef factory) {
  78     __CFLock(&factory->_lock);
  79     CFUUIDRef uuid = (CFUUIDRef)CFRetain(factory->_uuid);
  80     CFRetain(factory);
  81     __CFUnlock(&factory->_lock);
  82
  83     __CFLock(&CFPlugInGlobalDataLock);
  84     if (!_factoriesByFactoryID) {
  85         CFDictionaryValueCallBacks _factoryDictValueCallbacks = {0, NULL, NULL, NULL, NULL};
  86         _factoriesByFactoryID = CFDictionaryCreateMutable(kCFAllocatorSystemDefault, 0, &kCFTypeDictionaryKeyCallBacks, &_factoryDictValueCallbacks);
  87     }
  88     CFDictionarySetValue(_factoriesByFactoryID, uuid, factory);
  89     __CFUnlock(&CFPlugInGlobalDataLock);
  90
  91     if (uuid) CFRelease(uuid);
  92     CFRelease(factory);
  93 }
  94
  95 static void _CFPFactoryRemoveFromTable(_CFPFactoryRef factory) {
  96     __CFLock(&factory->_lock);
  97     CFUUIDRef uuid = factory->_uuid;
  98     if (uuid) CFRetain(uuid);
  99     __CFUnlock(&factory->_lock);
 100
 101     __CFLock(&CFPlugInGlobalDataLock);
 102     if (uuid && _factoriesByTypeID) CFDictionaryRemoveValue(_factoriesByFactoryID, uuid);
 103     __CFUnlock(&CFPlugInGlobalDataLock);
 104
 105     if (uuid) CFRelease(uuid);
 106 }
 107
 108 CF_PRIVATE _CFPFactoryRef _CFPFactoryFind(CFUUIDRef factoryID, Boolean enabled) {
 109     _CFPFactoryRef result = NULL;
 110
 111     __CFLock(&CFPlugInGlobalDataLock);
 112     if (_factoriesByFactoryID) {
 113         result = (_CFPFactoryRef )CFDictionaryGetValue(_factoriesByFactoryID, factoryID);
 114         if (result && result->_enabled != enabled) result = NULL;
 115     }
 116     __CFUnlock(&CFPlugInGlobalDataLock);
 117     return result;
 118 }
 119
 120 static void _CFPFactoryDeallocate(CFTypeRef ty) {
 121     SInt32 c;
 122     _CFPFactoryRef factory = (_CFPFactoryRef)ty;
 123
 124     _CFPFactoryRemoveFromTable(factory);
 125
 126     if (factory->_plugIn) {
 127         _CFPlugInRemoveFactory(factory->_plugIn, factory);
 128         CFRelease(factory->_plugIn);
 129     }
 130
 131     /* Remove all types for this factory. */
 132     c = CFArrayGetCount(factory->_types);
 133     while (c-- > 0) _CFPFactoryRemoveType(factory, (CFUUIDRef)CFArrayGetValueAtIndex(factory->_types, c));
 134     CFRelease(factory->_types);
 135
 136     if (factory->_funcName) CFRelease(factory->_funcName);
 137     if (factory->_uuid) CFRelease(factory->_uuid);
 138 }
 139
 140 static _CFPFactoryRef _CFPFactoryCommonCreate(CFAllocatorRef allocator, CFUUIDRef factoryID) {
 141     _CFPFactoryRef factory;
 142     uint32_t size;
 143     size = sizeof(struct __CFPFactory) - sizeof(CFRuntimeBase);
 144     factory = (_CFPFactoryRef)_CFRuntimeCreateInstance(allocator, _CFPFactoryGetTypeID(), size, NULL);
 145     if (!factory) return NULL;
 146
 147     factory->_uuid = (CFUUIDRef)CFRetain(factoryID);
 148     factory->_enabled = true;
 149     factory->_types = CFArrayCreateMutable(allocator, 0, &kCFTypeArrayCallBacks);
 150     factory->_lock = CFLockInit; // WARNING: grab global lock before this lock
 151
 152     _CFPFactoryAddToTable(factory);
 153
 154     return factory;
 155 }
 156
 157 CF_PRIVATE _CFPFactoryRef _CFPFactoryCreate(CFAllocatorRef allocator, CFUUIDRef factoryID, CFPlugInFactoryFunction func) {
 158     _CFPFactoryRef factory = _CFPFactoryCommonCreate(allocator, factoryID);
 159
 160     __CFLock(&factory->_lock);
 161     factory->_func = func;
 162     factory->_plugIn = NULL;
 163     factory->_funcName = NULL;
 164     __CFUnlock(&factory->_lock);
 165
 166     return factory;
 167 }
 168
 169 CF_PRIVATE _CFPFactoryRef _CFPFactoryCreateByName(CFAllocatorRef allocator, CFUUIDRef factoryID, CFPlugInRef plugIn, CFStringRef funcName) {
 170     _CFPFactoryRef factory = _CFPFactoryCommonCreate(allocator, factoryID);
 171
 172     __CFLock(&factory->_lock);
 173     factory->_func = NULL;
 174     factory->_plugIn = (CFPlugInRef)CFRetain(plugIn);
 175     if (plugIn) _CFPlugInAddFactory(plugIn, factory);
 176     factory->_funcName = (funcName ? (CFStringRef)CFStringCreateCopy(allocator, funcName) : NULL);
 177     __CFUnlock(&factory->_lock);
 178
 179     return factory;
 180 }
 181
 182 CF_PRIVATE CFUUIDRef _CFPFactoryCopyFactoryID(_CFPFactoryRef factory) {
 183     __CFLock(&factory->_lock);
 184     CFUUIDRef uuid = factory->_uuid;
 185     if (uuid) CFRetain(uuid);
 186     __CFUnlock(&factory->_lock);
 187     return uuid;
 188 }
 189
 190 CF_PRIVATE CFPlugInRef _CFPFactoryCopyPlugIn(_CFPFactoryRef factory) {
 191     __CFLock(&factory->_lock);
 192     CFPlugInRef result = factory->_plugIn;
 193     if (result) CFRetain(result);
 194     __CFUnlock(&factory->_lock);
 195     return result;
 196 }
 197
 198 CF_PRIVATE void *_CFPFactoryCreateInstance(CFAllocatorRef allocator, _CFPFactoryRef factory, CFUUIDRef typeID) {
 199     void *result = NULL;
 200
 201     __CFLock(&factory->_lock);
 202     if (factory->_enabled) {
 203         if (!factory->_func) {
 204             factory->_func = (CFPlugInFactoryFunction)CFBundleGetFunctionPointerForName(factory->_plugIn, factory->_funcName);
 205             if (!factory->_func) CFLog(__kCFLogPlugIn, CFSTR("Cannot find function pointer %@ for factory %@ in %@"), factory->_funcName, factory->_uuid, factory->_plugIn);
 206         }
 207         if (factory->_func) {
 208             // UPPGOOP
 209             CFPlugInFactoryFunction f = factory->_func;
 210             __CFUnlock(&factory->_lock);
 211             FAULT_CALLBACK((void **)&(f));
 212             result = (void *)INVOKE_CALLBACK2(f, allocator, typeID);
 213             __CFLock(&factory->_lock);
 214         }
 215     } else {
 216         CFLog(__kCFLogPlugIn, CFSTR("Factory %@ is disabled"), factory->_uuid);
 217     }
 218     __CFUnlock(&factory->_lock);
 219
 220     return result;
 221 }
 222
 223 CF_PRIVATE void _CFPFactoryDisable(_CFPFactoryRef factory) {
 224     __CFLock(&factory->_lock);
 225     factory->_enabled = false;
 226     __CFUnlock(&factory->_lock);
 227     CFRelease(factory);
 228 }
 229
 230 CF_PRIVATE void _CFPFactoryFlushFunctionCache(_CFPFactoryRef factory) {
 231     /* MF:!!! Assert that this factory belongs to a plugIn. */
 232     /* This is called by the factory's plugIn when the plugIn unloads its code. */
 233     __CFLock(&factory->_lock);
 234     factory->_func = NULL;
 235     __CFUnlock(&factory->_lock);
 236 }
 237
 238 CF_PRIVATE void _CFPFactoryAddType(_CFPFactoryRef factory, CFUUIDRef typeID) {
 239     /* Add the factory to the type's array of factories */
 240     __CFLock(&factory->_lock);
 241     /* Add the type to the factory's type list */
 242     CFArrayAppendValue(factory->_types, typeID);
 243     __CFUnlock(&factory->_lock);
 244
 245     __CFLock(&CFPlugInGlobalDataLock);
 246     if (!_factoriesByTypeID) _factoriesByTypeID = CFDictionaryCreateMutable(kCFAllocatorSystemDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 247     CFMutableArrayRef array = (CFMutableArrayRef)CFDictionaryGetValue(_factoriesByTypeID, typeID);
 248     if (!array) {
 249         CFArrayCallBacks _factoryArrayCallbacks = {0, NULL, NULL, NULL, NULL};
 250         // Create this from default allocator
 251         array = CFArrayCreateMutable(kCFAllocatorSystemDefault, 0, &_factoryArrayCallbacks);
 252         CFDictionarySetValue(_factoriesByTypeID, typeID, array);
 253         CFRelease(array);
 254     }
 255     CFArrayAppendValue(array, factory);
 256     __CFUnlock(&CFPlugInGlobalDataLock);
 257 }
 258
 259 CF_PRIVATE void _CFPFactoryRemoveType(_CFPFactoryRef factory, CFUUIDRef typeID) {
 260     /* Remove it from the factory's type list */
 261     SInt32 idx;
 262
 263     __CFLock(&factory->_lock);
 264     idx = CFArrayGetFirstIndexOfValue(factory->_types, CFRangeMake(0, CFArrayGetCount(factory->_types)), typeID);
 265     if (idx >= 0) CFArrayRemoveValueAtIndex(factory->_types, idx);
 266     __CFUnlock(&factory->_lock);
 267
 268     /* Remove the factory from the type's list of factories */
 269     __CFLock(&CFPlugInGlobalDataLock);
 270     if (_factoriesByTypeID) {
 271         CFMutableArrayRef array = (CFMutableArrayRef)CFDictionaryGetValue(_factoriesByTypeID, typeID);
 272         if (array) {
 273             idx = CFArrayGetFirstIndexOfValue(array, CFRangeMake(0, CFArrayGetCount(array)), factory);
 274             if (idx >= 0) {
 275                 CFArrayRemoveValueAtIndex(array, idx);
 276                 if (CFArrayGetCount(array) == 0) CFDictionaryRemoveValue(_factoriesByTypeID, typeID);
 277             }
 278         }
 279     }
 280     __CFUnlock(&CFPlugInGlobalDataLock);
 281 }
 282
 283 CF_PRIVATE Boolean _CFPFactorySupportsType(_CFPFactoryRef factory, CFUUIDRef typeID) {
 284     SInt32 idx;
 285
 286     __CFLock(&factory->_lock);
 287     idx = CFArrayGetFirstIndexOfValue(factory->_types, CFRangeMake(0, CFArrayGetCount(factory->_types)), typeID);
 288     __CFUnlock(&factory->_lock);
 289
 290     return (idx >= 0 ? true : false);
 291 }
 292
 293 CF_PRIVATE CFArrayRef _CFPFactoryFindCopyForType(CFUUIDRef typeID) {
 294     CFArrayRef result = NULL;
 295     __CFLock(&CFPlugInGlobalDataLock);
 296     if (_factoriesByTypeID) {
 297         result = (CFArrayRef)CFDictionaryGetValue(_factoriesByTypeID, typeID);
 298         if (result) CFRetain(result);
 299     }
 300     __CFUnlock(&CFPlugInGlobalDataLock);
 301
 302     return result;
 303 }
 304
 305 /* These methods are called by CFPlugInInstance when an instance is created or destroyed.  If a factory's instance count goes to 0 and the factory has been disabled, the factory is destroyed. */
 306 CF_PRIVATE void _CFPFactoryAddInstance(_CFPFactoryRef factory) {
 307     /* MF:!!! Assert that factory is enabled. */
 308     CFRetain(factory);
 309     __CFLock(&factory->_lock);
 310     CFPlugInRef plugin = factory->_plugIn;
 311     if (plugin) CFRetain(plugin);
 312     __CFUnlock(&factory->_lock);
 313     if (plugin) {
 314         _CFPlugInAddPlugInInstance(plugin);
 315         CFRelease(plugin);
 316     }
 317 }
 318
 319 CF_PRIVATE void _CFPFactoryRemoveInstance(_CFPFactoryRef factory) {
 320     __CFLock(&factory->_lock);
 321     CFPlugInRef plugin = factory->_plugIn;
 322     if (plugin) CFRetain(plugin);
 323     __CFUnlock(&factory->_lock);
 324     if (plugin) {
 325         _CFPlugInRemovePlugInInstance(factory->_plugIn);
 326         CFRelease(plugin);
 327     }
 328     CFRelease(factory);
 329 }