libkern/c++/OSCollection.cpp

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* IOArray.h created by rsulack on Thu 11-Sep-1997 */
  29
  30 #include <libkern/OSDebug.h>
  31
  32 #include <libkern/c++/OSCollection.h>
  33 #include <libkern/c++/OSDictionary.h>
  34
  35 #include <IOKit/IOKitDebug.h>
  36
  37 #define super OSObject
  38
  39 OSDefineMetaClassAndAbstractStructors(OSCollection, OSObject)
  40
  41
  42 OSMetaClassDefineReservedUsed(OSCollection, 0);
  43 OSMetaClassDefineReservedUsed(OSCollection, 1);
  44 OSMetaClassDefineReservedUnused(OSCollection, 2);
  45 OSMetaClassDefineReservedUnused(OSCollection, 3);
  46 OSMetaClassDefineReservedUnused(OSCollection, 4);
  47 OSMetaClassDefineReservedUnused(OSCollection, 5);
  48 OSMetaClassDefineReservedUnused(OSCollection, 6);
  49 OSMetaClassDefineReservedUnused(OSCollection, 7);
  50
  51 bool OSCollection::init()
  52 {
  53     if (!super::init())
  54         return false;
  55
  56     updateStamp = 0;
  57
  58     return true;
  59 }
  60
  61 void OSCollection::haveUpdated()
  62 {
  63     if (fOptions & kImmutable)
  64     {
  65         if (!(gIOKitDebug & kOSRegistryModsMode))
  66         {
  67             panic("Trying to change a collection in the registry");
  68         }
  69         else
  70         {
  71             OSReportWithBacktrace("Trying to change a collection in the registry");
  72         }
  73     }
  74     updateStamp++;
  75 }
  76
  77 unsigned OSCollection::setOptions(unsigned options, unsigned mask, void *)
  78 {
  79     unsigned old = fOptions;
  80
  81     if (mask)
  82         fOptions = (old & ~mask) | (options & mask);
  83
  84     return old;
  85 }
  86
  87 OSCollection *  OSCollection::copyCollection(OSDictionary *cycleDict)
  88 {
  89     if (cycleDict) {
  90         OSObject *obj = cycleDict->getObject((const OSSymbol *) this);
  91         if (obj)
  92             obj->retain();
  93
  94         return reinterpret_cast<OSCollection *>(obj);
  95     }
  96     else {
  97         // If we are here it means that there is a collection subclass that
  98         // hasn't overridden the copyCollection method.  In which case just
  99         // return a reference to ourselves.
 100         // Hopefully this collection will not be inserted into the registry
 101         retain();
 102         return this;
 103     }
 104 }