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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 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 // This file contains utility functions for dealing with the local | 5 // This file contains utility functions for dealing with the local |
6 // filesystem. | 6 // filesystem. |
7 | 7 |
8 #ifndef BASE_FILE_UTIL_H_ | 8 #ifndef BASE_FILE_UTIL_H_ |
9 #define BASE_FILE_UTIL_H_ | 9 #define BASE_FILE_UTIL_H_ |
10 | 10 |
11 #include "build/build_config.h" | 11 #include "build/build_config.h" |
12 | 12 |
13 #if defined(OS_WIN) | 13 #if defined(OS_WIN) |
14 #include <windows.h> | 14 #include <windows.h> |
15 #elif defined(OS_POSIX) | 15 #elif defined(OS_POSIX) |
16 #include <sys/stat.h> | 16 #include <sys/stat.h> |
17 #endif | 17 #endif |
18 | 18 |
19 #include <stdio.h> | 19 #include <stdio.h> |
20 | 20 |
21 #include <stack> | 21 #include <stack> |
22 #include <string> | 22 #include <string> |
23 #include <vector> | 23 #include <vector> |
24 | 24 |
25 #include "base/basictypes.h" | 25 #include "base/basictypes.h" |
26 #include "base/file_path.h" | 26 #include "base/file_path.h" |
27 #include "base/platform_file.h" | |
28 #include "base/scoped_ptr.h" | 27 #include "base/scoped_ptr.h" |
29 #include "base/string16.h" | 28 #include "base/string16.h" |
30 #include "base/time.h" | 29 #include "base/time.h" |
31 | 30 |
32 #if defined(OS_POSIX) | 31 #if defined(OS_POSIX) |
33 #include "base/file_descriptor_posix.h" | 32 #include "base/file_descriptor_posix.h" |
34 #endif | 33 #endif |
35 | 34 |
36 namespace base { | 35 namespace base { |
37 class Time; | 36 class Time; |
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484 // The default constructor sets all members to invalid/null values. | 483 // The default constructor sets all members to invalid/null values. |
485 MemoryMappedFile(); | 484 MemoryMappedFile(); |
486 ~MemoryMappedFile(); | 485 ~MemoryMappedFile(); |
487 | 486 |
488 // Opens an existing file and maps it into memory. Access is restricted to | 487 // Opens an existing file and maps it into memory. Access is restricted to |
489 // read only. If this object already points to a valid memory mapped file | 488 // read only. If this object already points to a valid memory mapped file |
490 // then this method will fail and return false. If it cannot open the file, | 489 // then this method will fail and return false. If it cannot open the file, |
491 // the file does not exist, or the memory mapping fails, it will return false. | 490 // the file does not exist, or the memory mapping fails, it will return false. |
492 // Later we may want to allow the user to specify access. | 491 // Later we may want to allow the user to specify access. |
493 bool Initialize(const FilePath& file_name); | 492 bool Initialize(const FilePath& file_name); |
494 // As above, but works with an already-opened file. MemoryMappedFile will take | 493 #if defined(OS_POSIX) |
495 // ownership of |file| and close it when done. | 494 // As above, but works with an alreay-opened file. |
496 bool Initialize(base::PlatformFile file); | 495 bool Initialize(const base::FileDescriptor& fd); |
| 496 #endif |
497 | 497 |
498 const uint8* data() const { return data_; } | 498 const uint8* data() const { return data_; } |
499 size_t length() const { return length_; } | 499 size_t length() const { return length_; } |
500 | 500 |
501 // Is file_ a valid file handle that points to an open, memory mapped file? | 501 // Is file_ a valid file handle that points to an open, memory mapped file? |
502 bool IsValid(); | 502 bool IsValid(); |
503 | 503 |
504 private: | 504 private: |
505 // Open the given file and pass it to MapFileToMemoryInternal(). | 505 // Map the file to memory, set data_ to that memory address. Return true on |
| 506 // success, false on any kind of failure. This is a helper for Initialize(). |
506 bool MapFileToMemory(const FilePath& file_name); | 507 bool MapFileToMemory(const FilePath& file_name); |
507 | 508 |
508 // Map the file to memory, set data_ to that memory address. Return true on | 509 #if defined(OS_POSIX) |
509 // success, false on any kind of failure. This is a helper for Initialize(). | |
510 bool MapFileToMemoryInternal(); | 510 bool MapFileToMemoryInternal(); |
| 511 #endif |
511 | 512 |
512 // Closes all open handles. Later we may want to make this public. | 513 // Closes all open handles. Later we may want to make this public. |
513 void CloseHandles(); | 514 void CloseHandles(); |
514 | 515 |
515 base::PlatformFile file_; | |
516 #if defined(OS_WIN) | 516 #if defined(OS_WIN) |
| 517 HANDLE file_; |
517 HANDLE file_mapping_; | 518 HANDLE file_mapping_; |
| 519 #elif defined(OS_POSIX) |
| 520 // The file descriptor. |
| 521 base::FileDescriptor file_; |
518 #endif | 522 #endif |
519 uint8* data_; | 523 uint8* data_; |
520 size_t length_; | 524 size_t length_; |
521 | 525 |
522 DISALLOW_COPY_AND_ASSIGN(MemoryMappedFile); | 526 DISALLOW_COPY_AND_ASSIGN(MemoryMappedFile); |
523 }; | 527 }; |
524 | 528 |
525 // Renames a file using the SHFileOperation API to ensure that the target file | 529 // Renames a file using the SHFileOperation API to ensure that the target file |
526 // gets the correct default security descriptor in the new path. | 530 // gets the correct default security descriptor in the new path. |
527 bool RenameFileAndResetSecurityDescriptor( | 531 bool RenameFileAndResetSecurityDescriptor( |
528 const FilePath& source_file_path, | 532 const FilePath& source_file_path, |
529 const FilePath& target_file_path); | 533 const FilePath& target_file_path); |
530 | 534 |
531 } // namespace file_util | 535 } // namespace file_util |
532 | 536 |
533 #endif // BASE_FILE_UTIL_H_ | 537 #endif // BASE_FILE_UTIL_H_ |
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