Mercurial > hg > orthanc
comparison OrthancFramework/Sources/MallocMemoryBuffer.cpp @ 4484:64f06e7d5fc7
new abstraction IMemoryBuffer to avoid unnecessary copies of std::string buffers
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 28 Jan 2021 19:03:19 +0100 |
parents | |
children | 7053502fbf97 |
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4483:a926f8995d0b | 4484:64f06e7d5fc7 |
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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 } |