Mercurial > hg > orthanc
diff 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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OrthancFramework/Sources/MallocMemoryBuffer.cpp Thu Jan 28 19:03:19 2021 +0100 @@ -0,0 +1,87 @@ +/** + * Orthanc - A Lightweight, RESTful DICOM Store + * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * Copyright (C) 2017-2021 Osimis S.A., Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation, either version 3 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this program. If not, see + * <http://www.gnu.org/licenses/>. + **/ + + +#include "PrecompiledHeaders.h" +#include "MallocMemoryBuffer.h" + +#include "OrthancException.h" + +#include <string.h> + + +namespace Orthanc +{ + MallocMemoryBuffer::MallocMemoryBuffer() : + buffer_(NULL), + size_(0), + free_(NULL) + { + } + + + void MallocMemoryBuffer::Clear() + { + if (size_ != 0) + { + if (free_ == NULL) + { + throw OrthancException(ErrorCode_InternalError); + } + + free_(buffer_); + buffer_ = NULL; + size_ = 0; + free_ = NULL; + } + } + + + void MallocMemoryBuffer::Assign(void* buffer, + size_t size, + FreeFunction freeFunction) + { + Clear(); + + buffer_ = buffer; + size_ = size; + free_ = freeFunction; + + if (size_ != 0 && + free_ == NULL) + { + throw OrthancException(ErrorCode_ParameterOutOfRange, "No valid free() function provided"); + } + } + + + void MallocMemoryBuffer::MoveToString(std::string& target) + { + target.resize(size_); + + if (size_ != 0) + { + memcpy(&target[0], buffer_, size_); + } + + Clear(); + } +}