37 static Status IOError(const std::string& context, int err_number) {  in IOError()
38   return Status::IOError(context, strerror(err_number));  in IOError()
102   virtual Status Read(size_t n, Slice* result, char* scratch) {  in Read()
103     Status s;  in Read()
117   virtual Status Skip(uint64_t n) {  in Skip()
121     return Status::OK();  in Skip()
151   virtual Status Read(uint64_t offset, size_t n, Slice* result,  in Read()
161     Status s;  in Read()
197   virtual Status Read(uint64_t offset, size_t n, Slice* result,  in Read()
199     Status s;  in Read()
226   virtual Status Append(const Slice& data) {  in Append()
231     return Status::OK();  in Append()
234   virtual Status Close() {  in Close()
235     Status result;  in Close()
243   virtual Status Flush() {  in Flush()
247     return Status::OK();  in Flush()
250   Status SyncDirIfManifest() {  in SyncDirIfManifest()
262     Status s;  in SyncDirIfManifest()
277   virtual Status Sync() {  in Sync()
279     Status s = SyncDirIfManifest();  in Sync()
285       s = Status::IOError(filename_, strerror(errno));  in Sync()
335   virtual Status NewSequentialFile(const std::string& fname,  in NewSequentialFile()
343       return Status::OK();  in NewSequentialFile()
347   virtual Status NewRandomAccessFile(const std::string& fname,  in NewRandomAccessFile()
350     Status s;  in NewRandomAccessFile()
375   virtual Status NewWritableFile(const std::string& fname,  in NewWritableFile()
377     Status s;  in NewWritableFile()
388   virtual Status NewAppendableFile(const std::string& fname,  in NewAppendableFile()
390     Status s;  in NewAppendableFile()
405   virtual Status GetChildren(const std::string& dir,  in GetChildren()
417     return Status::OK();  in GetChildren()
420   virtual Status DeleteFile(const std::string& fname) {  in DeleteFile()
421     Status result;  in DeleteFile()
428   virtual Status CreateDir(const std::string& name) {  in CreateDir()
429     Status result;  in CreateDir()
436   virtual Status DeleteDir(const std::string& name) {  in DeleteDir()
437     Status result;  in DeleteDir()
444   virtual Status GetFileSize(const std::string& fname, uint64_t* size) {  in GetFileSize()
445     Status s;  in GetFileSize()
456   virtual Status RenameFile(const std::string& src, const std::string& target) {  in RenameFile()
457     Status result;  in RenameFile()
464   virtual Status LockFile(const std::string& fname, FileLock** lock) {  in LockFile()
466     Status result;  in LockFile()
472       result = Status::IOError("lock " + fname, "already held by process");  in LockFile()
486   virtual Status UnlockFile(FileLock* lock) {  in UnlockFile()
488     Status result;  in UnlockFile()
502   virtual Status GetTestDirectory(std::string* result) {  in GetTestDirectory()
513     return Status::OK();  in GetTestDirectory()
523   virtual Status NewLogger(const std::string& fname, Logger** result) {  in NewLogger()
530       return Status::OK();  in NewLogger()