COMPMID-2166: Add tests for importing memory mapped files.

Change-Id: I011773bbe0bf6774a9718d414b4b297b4d8996c0
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1179
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 110 insertions, 0 deletions

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 <string>
+#include <utility>
+
+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__ */