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1 // Copyright 2017 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //    http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 // An interface for the filesystem that allows mocking the filesystem in
16 // unittests.
17 #ifndef CPU_FEATURES_INCLUDE_INTERNAL_FILESYSTEM_H_
18 #define CPU_FEATURES_INCLUDE_INTERNAL_FILESYSTEM_H_
19 
20 #include <stddef.h>
21 #include <stdint.h>
22 
23 #include "cpu_features_macros.h"
24 
25 CPU_FEATURES_START_CPP_NAMESPACE
26 
27 // Same as linux "open(filename, O_RDONLY)", retries automatically on EINTR.
28 int CpuFeatures_OpenFile(const char* filename);
29 
30 // Same as linux "read(file_descriptor, buffer, buffer_size)", retries
31 // automatically on EINTR.
32 int CpuFeatures_ReadFile(int file_descriptor, void* buffer, size_t buffer_size);
33 
34 // Same as linux "close(file_descriptor)".
35 void CpuFeatures_CloseFile(int file_descriptor);
36 
37 CPU_FEATURES_END_CPP_NAMESPACE
38 
39 #endif  // CPU_FEATURES_INCLUDE_INTERNAL_FILESYSTEM_H_
40