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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 #include "base/file_util.h" | 5 #include "base/file_util.h" |
6 | 6 |
7 #include <windows.h> | 7 #include <windows.h> |
8 #include <shellapi.h> | 8 #include <shellapi.h> |
9 #include <shlobj.h> | 9 #include <shlobj.h> |
10 #include <time.h> | 10 #include <time.h> |
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685 // If |cur_file| is a directory, and we are doing recursive searching, add | 685 // If |cur_file| is a directory, and we are doing recursive searching, add |
686 // it to pending_paths_ so we scan it after we finish scanning this | 686 // it to pending_paths_ so we scan it after we finish scanning this |
687 // directory. | 687 // directory. |
688 pending_paths_.push(cur_file); | 688 pending_paths_.push(cur_file); |
689 } | 689 } |
690 return (file_type_ & FileEnumerator::DIRECTORIES) ? cur_file : Next(); | 690 return (file_type_ & FileEnumerator::DIRECTORIES) ? cur_file : Next(); |
691 } | 691 } |
692 return (file_type_ & FileEnumerator::FILES) ? cur_file : Next(); | 692 return (file_type_ & FileEnumerator::FILES) ? cur_file : Next(); |
693 } | 693 } |
694 | 694 |
695 bool EvictFileFromSystemCache(const FilePath path) { | |
696 // Overwrite it with no buffering. | |
697 ScopedHandle file(CreateFile(path.value().c_str(), | |
698 GENERIC_READ | GENERIC_WRITE, | |
699 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, | |
700 OPEN_EXISTING, FILE_FLAG_NO_BUFFERING, NULL)); | |
701 if (!file.IsValid()) | |
702 return false; | |
703 | |
704 // Execute in chunks. It could be optimized. We want to do few of these since | |
705 // these operations will be slow without the cache. | |
706 char buffer[128 * 1024]; | |
707 int total_bytes = 0; | |
708 DWORD bytes_read; | |
709 for (;;) { | |
710 if (!ReadFile(file, buffer, sizeof(buffer), &bytes_read, NULL)) | |
711 return false; | |
712 if (bytes_read == 0) | |
713 break; | |
714 | |
715 bool final = false; | |
716 if (bytes_read < sizeof(buffer)) | |
717 final = true; | |
718 | |
719 DWORD to_write = final ? sizeof(buffer) : bytes_read; | |
720 | |
721 DWORD actual; | |
722 SetFilePointer(file, total_bytes, 0, FILE_BEGIN); | |
723 if (!WriteFile(file, buffer, to_write, &actual, NULL)) | |
724 return false; | |
725 total_bytes += bytes_read; | |
726 | |
727 if (final) { | |
728 SetFilePointer(file, total_bytes, 0, FILE_BEGIN); | |
729 SetEndOfFile(file); | |
730 break; | |
731 } | |
732 } | |
733 return true; | |
734 } | |
735 | |
736 } // namespace file_util | 695 } // namespace file_util |
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