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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef BASE_MEMORY_SHARED_MEMORY_HELPER_H_ | |
6 #define BASE_MEMORY_SHARED_MEMORY_HELPER_H_ | |
7 | |
8 #include "base/memory/shared_memory.h" | |
9 | |
10 #include <fcntl.h> | |
11 | |
12 namespace base { | |
13 | |
14 struct ScopedPathUnlinkerTraits { | |
Mark Mentovai
2016/12/09 19:53:53
Does this need to be in the header? Doesn’t look l
lawrencewu
2016/12/09 20:32:12
Moved to the .cc file.
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15 static FilePath* InvalidValue() { return nullptr; } | |
Mark Mentovai
2016/12/09 19:53:53
Can probably use const FilePath for this unlinker
lawrencewu
2016/12/09 20:32:12
Done.
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16 | |
17 static void Free(FilePath* path) { | |
18 if (unlink(path->value().c_str())) | |
19 PLOG(WARNING) << "unlink"; | |
20 } | |
21 }; | |
22 | |
23 // Unlinks the FilePath when the object is destroyed. | |
24 using ScopedPathUnlinker = ScopedGeneric<FilePath*, ScopedPathUnlinkerTraits>; | |
Mark Mentovai
2016/12/09 19:53:53
(through here)
lawrencewu
2016/12/09 20:32:13
Done.
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25 | |
26 #if !defined(OS_ANDROID) | |
27 // Makes a temporary file, fdopens it, and then unlinks it. |fp| is populated | |
28 // with the fdopened FILE. |readonly_fd| is populated with the opened fd if | |
29 // options.share_read_only is true. |path| is populated with the location of | |
30 // the file before it was unlinked. | |
31 // Returns false if there's an unhandled failure. | |
32 bool CreateAnonymousSharedMemory(const SharedMemoryCreateOptions& options, | |
33 ScopedFILE* fp, | |
34 ScopedFD* readonly_fd, | |
35 FilePath* path); | |
36 | |
37 // Takes the outputs of CreateAnonymousSharedMemory and maps them properly to | |
38 // |mapped_file| or |readonly_mapped_file|, depending on which one is populated. | |
39 bool PrepareMapFile(ScopedFILE fp, ScopedFD readonly_fd, int* mapped_file, | |
40 int* readonly_mapped_file); | |
41 #endif | |
42 | |
43 } // namespace base | |
44 | |
45 #endif // BASE_MEMORY_SHARED_MEMORY_HELPER_H_ | |
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