1 // Copyright 2017 Google Inc.
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 #include "internal/filesystem.h"
16
17 #include <errno.h>
18 #include <fcntl.h>
19 #include <stdlib.h>
20 #include <sys/stat.h>
21 #include <sys/types.h>
22
23 #if defined(CPU_FEATURES_MOCK_FILESYSTEM)
24 // Implementation will be provided by test/filesystem_for_testing.cc.
25 #elif defined(_MSC_VER)
26 #include <io.h>
CpuFeatures_OpenFile(const char * filename)27 int CpuFeatures_OpenFile(const char* filename) {
28 int fd = -1;
29 _sopen_s(&fd, filename, _O_RDONLY, _SH_DENYWR, _S_IREAD);
30 return fd;
31 }
32
CpuFeatures_CloseFile(int file_descriptor)33 void CpuFeatures_CloseFile(int file_descriptor) { _close(file_descriptor); }
34
CpuFeatures_ReadFile(int file_descriptor,void * buffer,size_t buffer_size)35 int CpuFeatures_ReadFile(int file_descriptor, void* buffer,
36 size_t buffer_size) {
37 return _read(file_descriptor, buffer, (unsigned int)buffer_size);
38 }
39
40 #else
41 #include <unistd.h>
42
CpuFeatures_OpenFile(const char * filename)43 int CpuFeatures_OpenFile(const char* filename) {
44 int result;
45 do {
46 result = open(filename, O_RDONLY);
47 } while (result == -1L && errno == EINTR);
48 return result;
49 }
50
CpuFeatures_CloseFile(int file_descriptor)51 void CpuFeatures_CloseFile(int file_descriptor) { close(file_descriptor); }
52
CpuFeatures_ReadFile(int file_descriptor,void * buffer,size_t buffer_size)53 int CpuFeatures_ReadFile(int file_descriptor, void* buffer,
54 size_t buffer_size) {
55 int result;
56 do {
57 result = read(file_descriptor, buffer, buffer_size);
58 } while (result == -1L && errno == EINTR);
59 return result;
60 }
61
62 #endif
63