--- /dev/null
+// Copyright 2017 Google Inc.
+//
+// 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 "internal/filesystem.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#if defined(_MSC_VER)
+#include <io.h>
+int CpuFeatures_OpenFile(const char* filename) {
+ return _open(filename, _O_RDONLY);
+}
+
+void CpuFeatures_CloseFile(int file_descriptor) { _close(file_descriptor); }
+
+int CpuFeatures_ReadFile(int file_descriptor, void* buffer,
+ size_t buffer_size) {
+ return _read(file_descriptor, buffer, buffer_size);
+}
+
+#else
+#include <unistd.h>
+
+int CpuFeatures_OpenFile(const char* filename) {
+ int result;
+ do {
+ result = open(filename, O_RDONLY);
+ } while (result == -1L && errno == EINTR);
+ return result;
+}
+
+void CpuFeatures_CloseFile(int file_descriptor) { close(file_descriptor); }
+
+int CpuFeatures_ReadFile(int file_descriptor, void* buffer,
+ size_t buffer_size) {
+ int result;
+ do {
+ result = read(file_descriptor, buffer, buffer_size);
+ } while (result == -1L && errno == EINTR);
+ return result;
+}
+
+#endif