From b8d5b958d489c21214cc23755d442e4e78f03878 Mon Sep 17 00:00:00 2001 From: Georgios Pinitas Date: Thu, 16 May 2019 14:13:03 +0100 Subject: COMPMID-2166: Add tests for importing memory mapped files. Change-Id: I011773bbe0bf6774a9718d414b4b297b4d8996c0 Signed-off-by: Georgios Pinitas Reviewed-on: https://review.mlplatform.org/c/1179 Reviewed-by: Michalis Spyrou Comments-Addressed: Arm Jenkins Tested-by: Arm Jenkins --- arm_compute/core/utils/misc/MMappedFile.h | 110 ++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100644 arm_compute/core/utils/misc/MMappedFile.h (limited to 'arm_compute/core/utils') diff --git a/arm_compute/core/utils/misc/MMappedFile.h b/arm_compute/core/utils/misc/MMappedFile.h new file mode 100644 index 0000000000..4b13adb5e9 --- /dev/null +++ b/arm_compute/core/utils/misc/MMappedFile.h @@ -0,0 +1,110 @@ +/* + * Copyright (c) 2019 ARM Limited. + * + * SPDX-License-Identifier: MIT + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#ifndef __ARM_COMPUTE_MISC_MMAPPED_FILE_H__ +#define __ARM_COMPUTE_MISC_MMAPPED_FILE_H__ + +#if !defined(BARE_METAL) + +#include +#include + +namespace arm_compute +{ +namespace utils +{ +namespace mmap_io +{ +/** Memory mapped file class */ +class MMappedFile +{ +public: + /** Constructor */ + MMappedFile(); + /** Constructor + * + * @note file will be created if it doesn't exist. + * + * @param[in] filename File to be mapped, if doesn't exist will be created. + * @param[in] size Size of file to map + * @param[in] offset Offset to mapping point, should be multiple of page size + */ + MMappedFile(std::string filename, size_t size, size_t offset); + /** Prevent instances of this class from being copied (As this class contains pointers) */ + MMappedFile(const MMappedFile &) = delete; + /** Default move constructor */ + MMappedFile(MMappedFile &&) = default; + /** Prevent instances of this class from being copied (As this class contains pointers) */ + MMappedFile &operator=(const MMappedFile &) = delete; + /** Default move assignment operator */ + MMappedFile &operator=(MMappedFile &&) = default; + /** Destructor */ + ~MMappedFile(); + /** Opens and maps a file + * + * @note file will be created if it doesn't exist. + * + * @param[in] filename File to be mapped, if doesn't exist will be created. + * @param[in] size Size of file to map. If 0 all the file will be mapped. + * @param[in] offset Offset to mapping point, should be multiple of page size. + * + * @return True if operation was successful else false + */ + bool map(const std::string &filename, size_t size, size_t offset); + /** Unmaps and closes file */ + void release(); + /** Mapped data accessor + * + * @return Pointer to the mapped data, nullptr if not mapped + */ + unsigned char *data(); + /** File size accessor + * + * @return Size of file + */ + size_t file_size() const; + /** Map size accessor + * + * @return Mapping size + */ + size_t map_size() const; + /** Checks if file mapped + * + * @return True if file is mapped else false + */ + bool is_mapped() const; + +private: + std::string _filename; + size_t _file_size; + size_t _map_size; + size_t _map_offset; + FILE *_fp; + void *_data; +}; +} // namespace mmap_io +} // namespace utils +} // namespace arm_compute +#endif // !defined(BARE_METAL) + +#endif /* __ARM_COMPUTE_MISC_MMAPPED_FILE_H__ */ -- cgit v1.2.1