1  /*
 2   * Copyright (c) 2000-2004,2006,2011,2014 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,
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  
25  //
26  // cssmalloc - memory allocation in the CDSA world.
27  //
28  // Don't eat heavily before inspecting this code.
29  //
30  #include <security_cdsa_utilities/cssmalloc.h>
31  #include <stdlib.h>
32  #include <errno.h>
33  #include <os/overflow.h>
34  
35  
36  
37  namespace Security {
38  
39  
40  //
41  // CssmMemoryFunctionsAllocators
42  //
43  void *CssmMemoryFunctionsAllocator::malloc(size_t size)
44  { return functions.malloc(size); }
45  
46  void CssmMemoryFunctionsAllocator::free(void *addr) _NOEXCEPT
47  { return functions.free(addr); }
48  
49  void *CssmMemoryFunctionsAllocator::realloc(void *addr, size_t size)
50  { return functions.realloc(addr, size); }
51  
52  
53  //
54  // CssmAllocatorMemoryFunctions
55  //
56  CssmAllocatorMemoryFunctions::CssmAllocatorMemoryFunctions(Allocator &alloc)
57  {
58  	AllocRef = &alloc;
59  	malloc_func = relayMalloc;
60  	free_func = relayFree;
61  	realloc_func = relayRealloc;
62  	calloc_func = relayCalloc;
63  }
64  
65  void *CssmAllocatorMemoryFunctions::relayMalloc(size_t size, void *ref)
66  { return allocator(ref).malloc(size); }
67  
68  void CssmAllocatorMemoryFunctions::relayFree(void *mem, void *ref) _NOEXCEPT
69  { allocator(ref).free(mem); }
70  
71  void *CssmAllocatorMemoryFunctions::relayRealloc(void *mem, size_t size, void *ref)
72  { return allocator(ref).realloc(mem, size); }
73  
74  void *CssmAllocatorMemoryFunctions::relayCalloc(uint32 count, size_t size, void *ref)
75  {
76  	// Allocator doesn't have a calloc() method
77  	size_t alloc_size = 0;
78  	if (os_mul_overflow(count, size, &alloc_size)) {
79  		return NULL;
80  	}
81  	void *mem = allocator(ref).malloc(alloc_size);
82  	memset(mem, 0, alloc_size);
83  	return mem;
84  }
85  
86  
87  //
88  // CssmVector
89  //
90  
91  
92  }   // namespace Security