diff options
Diffstat (limited to 'compiler/enco/frontend/tflite/src/RawModelLoader.cpp')
-rw-r--r-- | compiler/enco/frontend/tflite/src/RawModelLoader.cpp | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/compiler/enco/frontend/tflite/src/RawModelLoader.cpp b/compiler/enco/frontend/tflite/src/RawModelLoader.cpp new file mode 100644 index 000000000..5c127f37c --- /dev/null +++ b/compiler/enco/frontend/tflite/src/RawModelLoader.cpp @@ -0,0 +1,89 @@ +/* + * Copyright (c) 2018 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 "RawModelLoader.h" + +#include "cwrap/Fildes.h" + +#include <fcntl.h> +#include <unistd.h> +#include <sys/stat.h> +#include <sys/mman.h> + +namespace +{ + +class MemoryMappedRawModel final : public RawModel +{ +public: + /** + * @require fd and data SHOULD be valid + */ + explicit MemoryMappedRawModel(int fd, void *data, size_t size) : _fd{fd}, _data{data}, _size{size} + { + // DO NOTHING + } + +public: + ~MemoryMappedRawModel() + { + munmap(_data, _size); + close(_fd); + } + +public: + MemoryMappedRawModel(const MemoryMappedRawModel &) = delete; + MemoryMappedRawModel(MemoryMappedRawModel &&) = delete; + +public: + const tflite::Model *model(void) const override { return tflite::GetModel(_data); } + +private: + int _fd = -1; + void *_data = nullptr; + size_t _size = 0; +}; + +} // namespace + +std::unique_ptr<RawModel> load_from(const std::string &path) +{ + cwrap::Fildes fildes{open(path.c_str(), O_RDONLY)}; + + if (fildes.get() == -1) + { + // Return nullptr on open failure + return nullptr; + } + + struct stat st; + if (fstat(fildes.get(), &st) == -1) + { + // Return nullptr on fstat failure + return nullptr; + } + + auto size = st.st_size; + auto data = mmap(nullptr, size, PROT_READ, MAP_SHARED, fildes.get(), 0); + + if (data == MAP_FAILED) + { + // Return nullptr on mmap failure + return nullptr; + } + + return std::unique_ptr<RawModel>{new MemoryMappedRawModel(fildes.release(), data, size)}; +} |