OSX/libsecurity_utilities/lib/trackingallocator.h

   1 /*
   2  * Copyright (c) 2000-2004,2011,2014 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,
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  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
  25 //
  26 // trackingallocator - Allocator that keeps track of allocations
  27 //
  28 #ifndef _H_TRACKINGALLOCATOR
  29 #define _H_TRACKINGALLOCATOR
  30
  31 #include <security_utilities/alloc.h>
  32 #include <set>
  33
  34 namespace Security
  35 {
  36
  37 //
  38 // A Allocator that keeps track of allocations and can throw everything
  39 // away unless explicitly committed.
  40 //
  41 class TrackingAllocator : public Allocator
  42 {
  43 public:
  44         TrackingAllocator(Allocator &inAllocator) : subAllocator(inAllocator) {}
  45         virtual ~TrackingAllocator();
  46
  47         Allocator &subAllocator;
  48
  49         // standard Allocator operations
  50         void *malloc(size_t inSize) throw(std::bad_alloc);
  51         void free(void *inAddress) throw();
  52         void *realloc(void *inAddress, size_t inNewSize) throw(std::bad_alloc);
  53
  54         // reset frees all memory; commit forgets about it all
  55         void reset();
  56         void commit();
  57
  58 private:
  59         typedef std::set<void *> AllocSet;
  60         AllocSet mAllocSet;
  61 };
  62
  63 } // end namespace Security
  64
  65 #endif //_H_TRACKINGALLOCATOR