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Side by Side Diff: base/shared_memory.h

Issue 7461141: Rename BASE_API to BASE_EXPORT. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 4 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef BASE_SHARED_MEMORY_H_ 5 #ifndef BASE_SHARED_MEMORY_H_
6 #define BASE_SHARED_MEMORY_H_ 6 #define BASE_SHARED_MEMORY_H_
7 #pragma once 7 #pragma once
8 8
9 #include "build/build_config.h" 9 #include "build/build_config.h"
10 10
11 #if defined(OS_POSIX) 11 #if defined(OS_POSIX)
12 #include <sys/types.h> 12 #include <sys/types.h>
13 #include <semaphore.h> 13 #include <semaphore.h>
14 #include "base/file_descriptor_posix.h" 14 #include "base/file_descriptor_posix.h"
15 #endif 15 #endif
16 #include <string> 16 #include <string>
17 17
18 #include "base/base_api.h" 18 #include "base/base_export.h"
19 #include "base/basictypes.h" 19 #include "base/basictypes.h"
20 #include "base/process.h" 20 #include "base/process.h"
21 21
22 class FilePath; 22 class FilePath;
23 23
24 namespace base { 24 namespace base {
25 25
26 // SharedMemoryHandle is a platform specific type which represents 26 // SharedMemoryHandle is a platform specific type which represents
27 // the underlying OS handle to a shared memory segment. 27 // the underlying OS handle to a shared memory segment.
28 #if defined(OS_WIN) 28 #if defined(OS_WIN)
29 typedef HANDLE SharedMemoryHandle; 29 typedef HANDLE SharedMemoryHandle;
30 typedef HANDLE SharedMemoryLock; 30 typedef HANDLE SharedMemoryLock;
31 #elif defined(OS_POSIX) 31 #elif defined(OS_POSIX)
32 // A SharedMemoryId is sufficient to identify a given shared memory segment on a 32 // A SharedMemoryId is sufficient to identify a given shared memory segment on a
33 // system, but insufficient to map it. 33 // system, but insufficient to map it.
34 typedef FileDescriptor SharedMemoryHandle; 34 typedef FileDescriptor SharedMemoryHandle;
35 typedef ino_t SharedMemoryId; 35 typedef ino_t SharedMemoryId;
36 // On POSIX, the lock is implemented as a lockf() on the mapped file, 36 // On POSIX, the lock is implemented as a lockf() on the mapped file,
37 // so no additional member (or definition of SharedMemoryLock) is 37 // so no additional member (or definition of SharedMemoryLock) is
38 // needed. 38 // needed.
39 #endif 39 #endif
40 40
41 // Platform abstraction for shared memory. Provides a C++ wrapper 41 // Platform abstraction for shared memory. Provides a C++ wrapper
42 // around the OS primitive for a memory mapped file. 42 // around the OS primitive for a memory mapped file.
43 class BASE_API SharedMemory { 43 class BASE_EXPORT SharedMemory {
44 public: 44 public:
45 SharedMemory(); 45 SharedMemory();
46 46
47 #if defined(OS_WIN) 47 #if defined(OS_WIN)
48 // Similar to the default constructor, except that this allows for 48 // Similar to the default constructor, except that this allows for
49 // calling Lock() to acquire the named mutex before either Create or Open 49 // calling Lock() to acquire the named mutex before either Create or Open
50 // are called on Windows. 50 // are called on Windows.
51 explicit SharedMemory(const std::wstring& name); 51 explicit SharedMemory(const std::wstring& name);
52 #endif 52 #endif
53 53
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226 } 226 }
227 227
228 private: 228 private:
229 SharedMemory* shared_memory_; 229 SharedMemory* shared_memory_;
230 DISALLOW_COPY_AND_ASSIGN(SharedMemoryAutoLock); 230 DISALLOW_COPY_AND_ASSIGN(SharedMemoryAutoLock);
231 }; 231 };
232 232
233 } // namespace base 233 } // namespace base
234 234
235 #endif // BASE_SHARED_MEMORY_H_ 235 #endif // BASE_SHARED_MEMORY_H_
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