Kea  2.1.7-git
memory_segment_local.cc
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1 // Copyright (C) 2012-2015 Internet Systems Consortium, Inc. ("ISC")
2 //
3 // This Source Code Form is subject to the terms of the Mozilla Public
4 // License, v. 2.0. If a copy of the MPL was not distributed with this
5 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
6 
7 #include <config.h>
8 
10 #include <exceptions/exceptions.h>
11 
12 namespace isc {
13 namespace util {
14 
15 void*
17  void* ptr = malloc(size);
18  if (ptr == NULL) {
19  throw std::bad_alloc();
20  }
21 
22  allocated_size_ += size;
23  return (ptr);
24 }
25 
26 void
27 MemorySegmentLocal::deallocate(void* ptr, size_t size) {
28  if (ptr == NULL) {
29  // Return early if NULL is passed to be deallocated (without
30  // modifying allocated_size, or comparing against it).
31  return;
32  }
33 
34  if (size > allocated_size_) {
35  isc_throw(OutOfRange, "Invalid size to deallocate: " << size
36  << "; currently allocated size: " << allocated_size_);
37  }
38 
39  allocated_size_ -= size;
40  free(ptr);
41 }
42 
43 bool
45  return (allocated_size_ == 0 && named_addrs_.empty());
46 }
47 
49 MemorySegmentLocal::getNamedAddressImpl(const char* name) const {
50  std::map<std::string, void*>::const_iterator found =
51  named_addrs_.find(name);
52  if (found != named_addrs_.end()) {
53  return (NamedAddressResult(true, found->second));
54  }
55  return (NamedAddressResult(false, static_cast<void*>(0)));
56 }
57 
58 bool
59 MemorySegmentLocal::setNamedAddressImpl(const char* name, void* addr) {
60  named_addrs_[name] = addr;
61  return (false);
62 }
63 
64 bool
66  const size_t n_erased = named_addrs_.erase(name);
67  return (n_erased != 0);
68 }
69 
70 } // namespace util
71 } // namespace isc
virtual bool allMemoryDeallocated() const
Check if all allocated memory was deallocated.
virtual void deallocate(void *ptr, size_t size)
Free/release a segment of memory.
virtual void * allocate(size_t size)
Allocate/acquire a segment of memory.
virtual NamedAddressResult getNamedAddressImpl(const char *name) const
Local segment version of getNamedAddress.
std::pair< bool, void * > NamedAddressResult
Type definition for result returned by getNamedAddress()
#define isc_throw(type, stream)
A shortcut macro to insert known values into exception arguments.
Defines the logger used by the top-level component of kea-lfc.
A generic exception that is thrown if a parameter given to a method would refer to or modify out-of-r...
virtual bool setNamedAddressImpl(const char *name, void *addr)
Local segment version of setNamedAddress.
virtual bool clearNamedAddressImpl(const char *name)
Local segment version of clearNamedAddress.