| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Author: jmarantz@google.com (Joshua Marantz) |
| |
| #ifndef PAGESPEED_KERNEL_BASE_STDIO_FILE_SYSTEM_H_ |
| #define PAGESPEED_KERNEL_BASE_STDIO_FILE_SYSTEM_H_ |
| |
| #include "pagespeed/kernel/base/basictypes.h" |
| #include "pagespeed/kernel/base/file_system.h" |
| #include "pagespeed/kernel/base/statistics.h" |
| #include "pagespeed/kernel/base/string_util.h" |
| |
| struct stat; |
| |
| namespace net_instaweb { |
| |
| class MessageHandler; |
| class Timer; |
| |
| class StdioFileSystem : public FileSystem { |
| public: |
| StdioFileSystem(); |
| virtual ~StdioFileSystem(); |
| |
| virtual int MaxPathLength(const StringPiece& base) const; |
| |
| virtual InputFile* OpenInputFile(const char* filename, |
| MessageHandler* message_handler); |
| virtual OutputFile* OpenOutputFileHelper(const char* filename, |
| bool append, |
| MessageHandler* message_handler); |
| virtual OutputFile* OpenTempFileHelper(const StringPiece& prefix_name, |
| MessageHandler* message_handle); |
| |
| virtual bool ListContents(const StringPiece& dir, StringVector* files, |
| MessageHandler* handler); |
| virtual bool MakeDir(const char* directory_path, MessageHandler* handler); |
| virtual bool RemoveDir(const char* directory_path, MessageHandler* handler); |
| virtual bool RemoveFile(const char* filename, MessageHandler* handler); |
| virtual bool RenameFileHelper(const char* old_file, const char* new_file, |
| MessageHandler* handler); |
| |
| virtual bool Atime(const StringPiece& path, int64* timestamp_sec, |
| MessageHandler* handler); |
| virtual bool Mtime(const StringPiece& path, int64* timestamp_sec, |
| MessageHandler* handler); |
| // Report the disk utilization of the file specified by path. Note that disk |
| // utilization could differ from the apparent size of the file as it depends |
| // on the underlying file system and default block size. |
| virtual bool Size(const StringPiece& path, int64* size, |
| MessageHandler* handler); |
| virtual BoolOrError Exists(const char* path, MessageHandler* handler); |
| virtual BoolOrError IsDir(const char* path, MessageHandler* handler); |
| |
| virtual BoolOrError TryLock(const StringPiece& lock_name, |
| MessageHandler* handler); |
| virtual BoolOrError TryLockWithTimeout(const StringPiece& lock_name, |
| int64 timeout_ms, |
| const Timer* timer, |
| MessageHandler* handler); |
| |
| virtual bool Unlock(const StringPiece& lock_name, MessageHandler* handler); |
| |
| InputFile* Stdin(); |
| OutputFile* Stdout(); |
| OutputFile* Stderr(); |
| |
| static void InitStats(Statistics* stats); |
| void TrackTiming(int64 slow_file_latency_threshold_us, Timer* timer, |
| Statistics* stats, MessageHandler* handler); |
| |
| int64 StartTimer(); |
| void EndTimer(const char* filename, const char* operation, int64 start_us); |
| |
| private: |
| // Used by *time and Size methods to get file info. |
| bool Stat(const StringPiece& path, struct stat* statbuf, |
| MessageHandler* handler); |
| |
| int64 slow_file_latency_threshold_us_; |
| Timer* timer_; |
| Statistics* statistics_; |
| UpDownCounter* outstanding_ops_; |
| Variable* slow_ops_; |
| Variable* total_ops_; |
| MessageHandler* message_handler_; // Only set by TrackTiming, not by ctor. |
| |
| DISALLOW_COPY_AND_ASSIGN(StdioFileSystem); |
| }; |
| |
| } // namespace net_instaweb |
| |
| #endif // PAGESPEED_KERNEL_BASE_STDIO_FILE_SYSTEM_H_ |