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comparison OrthancFramework/Sources/MallocMemoryBuffer.cpp @ 4484:64f06e7d5fc7

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new abstraction IMemoryBuffer to avoid unnecessary copies of std::string buffers
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 28 Jan 2021 19:03:19 +0100
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children 7053502fbf97
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4483:a926f8995d0b 4484:64f06e7d5fc7
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2021 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public License
9 * as published by the Free Software Foundation, either version 3 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this program. If not, see
19 * <http://www.gnu.org/licenses/>.
20 **/
21
22
23 #include "PrecompiledHeaders.h"
24 #include "MallocMemoryBuffer.h"
25
26 #include "OrthancException.h"
27
28 #include <string.h>
29
30
31 namespace Orthanc
32 {
33 MallocMemoryBuffer::MallocMemoryBuffer() :
34 buffer_(NULL),
35 size_(0),
36 free_(NULL)
37 {
38 }
39
40
41 void MallocMemoryBuffer::Clear()
42 {
43 if (size_ != 0)
44 {
45 if (free_ == NULL)
46 {
47 throw OrthancException(ErrorCode_InternalError);
48 }
49
50 free_(buffer_);
51 buffer_ = NULL;
52 size_ = 0;
53 free_ = NULL;
54 }
55 }
56
57
58 void MallocMemoryBuffer::Assign(void* buffer,
59 size_t size,
60 FreeFunction freeFunction)
61 {
62 Clear();
63
64 buffer_ = buffer;
65 size_ = size;
66 free_ = freeFunction;
67
68 if (size_ != 0 &&
69 free_ == NULL)
70 {
71 throw OrthancException(ErrorCode_ParameterOutOfRange, "No valid free() function provided");
72 }
73 }
74
75
76 void MallocMemoryBuffer::MoveToString(std::string& target)
77 {
78 target.resize(size_);
79
80 if (size_ != 0)
81 {
82 memcpy(&target[0], buffer_, size_);
83 }
84
85 Clear();
86 }
87 }