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Diffstat (limited to 'compiler/tfl-verify/src/Model.cpp')
-rw-r--r-- | compiler/tfl-verify/src/Model.cpp | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/compiler/tfl-verify/src/Model.cpp b/compiler/tfl-verify/src/Model.cpp new file mode 100644 index 000000000..efac1210d --- /dev/null +++ b/compiler/tfl-verify/src/Model.cpp @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "Model.h" + +#include <cwrap/Fildes.h> + +#include <fcntl.h> +#include <unistd.h> +#include <sys/stat.h> +#include <sys/mman.h> + +namespace +{ + +class MemoryMappedModel final : public ModelData +{ +public: + /** + * @require fd and data SHOULD be valid + */ + explicit MemoryMappedModel(int fd, void *data, size_t size) : _fd{fd}, _data{data}, _size{size} + { + // DO NOTHING + } + +public: + ~MemoryMappedModel() + { + munmap(_data, _size); + close(_fd); + } + +public: + MemoryMappedModel(const MemoryMappedModel &) = delete; + MemoryMappedModel(MemoryMappedModel &&) = delete; + +public: + const void *data(void) const override { return _data; }; + const size_t size(void) const override { return _size; }; + +private: + int _fd = -1; + void *_data = nullptr; + size_t _size = 0; +}; + +} // namespace + +std::unique_ptr<ModelData> load_modeldata(const std::string &path) +{ + cwrap::Fildes fd(open(path.c_str(), O_RDONLY)); + + if (fd.get() == -1) + { + // Return nullptr on open failure + return nullptr; + } + + struct stat st; + if (fstat(fd.get(), &st) == -1) + { + // Return nullptr on fstat failure + return nullptr; + } + + auto size = st.st_size; + auto data = mmap(nullptr, size, PROT_READ, MAP_SHARED, fd.get(), 0); + + if (data == MAP_FAILED) + { + // Return nullptr on mmap failure + return nullptr; + } + + return std::unique_ptr<ModelData>{new MemoryMappedModel(fd.release(), data, size)}; +} |