LXR darwin-xnu/libkern/c++/OSCollection.cpp

   1/*
   2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3 *
   4 * @APPLE_LICENSE_HEADER_START@
   5 * 
   6 * The contents of this file constitute Original Code as defined in and
   7 * are subject to the Apple Public Source License Version 1.1 (the
   8 * "License").  You may not use this file except in compliance with the
   9 * License.  Please obtain a copy of the License at
  10 * http://www.apple.com/publicsource and read it before using this file.
  11 * 
  12 * This Original Code and all software distributed under the License are
  13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17 * License for the specific language governing rights and limitations
  18 * under the License.
  19 * 
  20 * @APPLE_LICENSE_HEADER_END@
  21 */
  22/* IOArray.h created by rsulack on Thu 11-Sep-1997 */
  23
  24#include <libkern/OSDebug.h>
  25
  26#include <libkern/c++/OSCollection.h>
  27#include <libkern/c++/OSDictionary.h>
  28
  29#include <IOKit/IOKitDebug.h>
  30
  31#define super OSObject
  32
  33OSDefineMetaClassAndAbstractStructors(OSCollection, OSObject)
  34
  35
  36OSMetaClassDefineReservedUsed(OSCollection, 0);
  37OSMetaClassDefineReservedUsed(OSCollection, 1);
  38OSMetaClassDefineReservedUnused(OSCollection, 2);
  39OSMetaClassDefineReservedUnused(OSCollection, 3);
  40OSMetaClassDefineReservedUnused(OSCollection, 4);
  41OSMetaClassDefineReservedUnused(OSCollection, 5);
  42OSMetaClassDefineReservedUnused(OSCollection, 6);
  43OSMetaClassDefineReservedUnused(OSCollection, 7);
  44
  45bool OSCollection::init()
  46{
  47    if (!super::init())
  48        return false;
  49
  50    updateStamp = 0;
  51
  52    return true;
  53}
  54
  55void OSCollection::haveUpdated()
  56{
  57    if ( (gIOKitDebug & kOSLogRegistryMods) && (fOptions & kImmutable) )
  58        OSReportWithBacktrace("Trying to change a collection in the registry");
  59
  60    updateStamp++;
  61}
  62
  63unsigned OSCollection::setOptions(unsigned options, unsigned mask, void *)
  64{
  65    unsigned old = fOptions;
  66
  67    if (mask)
  68        fOptions = (old & ~mask) | (options & mask);
  69
  70    return old;
  71}
  72
  73OSCollection *  OSCollection::copyCollection(OSDictionary *cycleDict)
  74{
  75    if (cycleDict) {
  76        OSObject *obj = cycleDict->getObject((const OSSymbol *) this);
  77        if (obj)
  78            obj->retain();
  79
  80        return reinterpret_cast<OSCollection *>(obj);
  81    }
  82    else {
  83        // If we are here it means that there is a collection subclass that
  84        // hasn't overridden the copyCollection method.  In which case just
  85        // return a reference to ourselves.  
  86        // Hopefully this collection will not be inserted into the registry
  87        retain();
  88        return this;
  89    }
  90}
  91