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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_MEMORY_SHARED_MEMORY_H_ | 5 #ifndef BASE_MEMORY_SHARED_MEMORY_H_ |
6 #define BASE_MEMORY_SHARED_MEMORY_H_ | 6 #define BASE_MEMORY_SHARED_MEMORY_H_ |
7 | 7 |
8 #include "build/build_config.h" | 8 #include "build/build_config.h" |
9 | 9 |
10 #include <string> | 10 #include <string> |
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77 | 77 |
78 // Create a new SharedMemory object from an existing, open | 78 // Create a new SharedMemory object from an existing, open |
79 // shared memory file. | 79 // shared memory file. |
80 // | 80 // |
81 // WARNING: This does not reduce the OS-level permissions on the handle; it | 81 // WARNING: This does not reduce the OS-level permissions on the handle; it |
82 // only affects how the SharedMemory will be mmapped. Use | 82 // only affects how the SharedMemory will be mmapped. Use |
83 // ShareReadOnlyToProcess to drop permissions. TODO(jln,jyasskin): DCHECK | 83 // ShareReadOnlyToProcess to drop permissions. TODO(jln,jyasskin): DCHECK |
84 // that |read_only| matches the permissions of the handle. | 84 // that |read_only| matches the permissions of the handle. |
85 SharedMemory(const SharedMemoryHandle& handle, bool read_only); | 85 SharedMemory(const SharedMemoryHandle& handle, bool read_only); |
86 | 86 |
| 87 #if defined(OS_WIN) |
87 // Create a new SharedMemory object from an existing, open | 88 // Create a new SharedMemory object from an existing, open |
88 // shared memory file that was created by a remote process and not shared | 89 // shared memory file that was created by a remote process and not shared |
89 // to the current process. | 90 // to the current process. |
90 SharedMemory(const SharedMemoryHandle& handle, | 91 SharedMemory(const SharedMemoryHandle& handle, |
91 bool read_only, | 92 bool read_only, |
92 ProcessHandle process); | 93 ProcessHandle process); |
| 94 #endif |
93 | 95 |
94 // Closes any open files. | 96 // Closes any open files. |
95 ~SharedMemory(); | 97 ~SharedMemory(); |
96 | 98 |
97 // Return true iff the given handle is valid (i.e. not the distingished | 99 // Return true iff the given handle is valid (i.e. not the distingished |
98 // invalid value; NULL for a HANDLE and -1 for a file descriptor) | 100 // invalid value; NULL for a HANDLE and -1 for a file descriptor) |
99 static bool IsHandleValid(const SharedMemoryHandle& handle); | 101 static bool IsHandleValid(const SharedMemoryHandle& handle); |
100 | 102 |
101 // Returns invalid handle (see comment above for exact definition). | 103 // Returns invalid handle (see comment above for exact definition). |
102 static SharedMemoryHandle NULLHandle(); | 104 static SharedMemoryHandle NULLHandle(); |
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300 size_t mapped_size_; | 302 size_t mapped_size_; |
301 void* memory_; | 303 void* memory_; |
302 bool read_only_; | 304 bool read_only_; |
303 size_t requested_size_; | 305 size_t requested_size_; |
304 | 306 |
305 DISALLOW_COPY_AND_ASSIGN(SharedMemory); | 307 DISALLOW_COPY_AND_ASSIGN(SharedMemory); |
306 }; | 308 }; |
307 } // namespace base | 309 } // namespace base |
308 | 310 |
309 #endif // BASE_MEMORY_SHARED_MEMORY_H_ | 311 #endif // BASE_MEMORY_SHARED_MEMORY_H_ |
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