leveldb::anonymous_namespace{env_posix.cc}::PosixRandomAccessFile Class Reference

Inheritance diagram for leveldb::anonymous_namespace{env_posix.cc}::PosixRandomAccessFile:

Collaboration diagram for leveldb::anonymous_namespace{env_posix.cc}::PosixRandomAccessFile:

Public Member Functions
	PosixRandomAccessFile (const std::string &fname, int fd)
virtual	~PosixRandomAccessFile ()
virtual Status	Read (uint64_t offset, size_t n, Slice *result, char *scratch) const
Public Member Functions inherited from leveldb::RandomAccessFile
	RandomAccessFile ()
virtual	~RandomAccessFile ()

Private Attributes
std::string	filename_
int	fd_

Detailed Description

Definition at line 69 of file env_posix.cc.

Constructor & Destructor Documentation

PosixRandomAccessFile()

leveldb::anonymous_namespace{env_posix.cc}::PosixRandomAccessFile::PosixRandomAccessFile ( const std::string &  fname, int  fd  )

inline

Definition at line 75 of file env_posix.cc.

      : filename_(fname), fd_(fd) { }

~PosixRandomAccessFile()

virtual leveldb::anonymous_namespace{env_posix.cc}::PosixRandomAccessFile::~PosixRandomAccessFile ( )

inlinevirtual

Definition at line 77 of file env_posix.cc.

{ close(fd_); }

Member Function Documentation

Read()

virtual Status leveldb::anonymous_namespace{env_posix.cc}::PosixRandomAccessFile::Read ( uint64_t  offset, size_t  n, Slice *  result, char *  scratch  ) const

inlinevirtual

Implements leveldb::RandomAccessFile.

Definition at line 79 of file env_posix.cc.

                                           {
    Status s;
    ssize_t r = pread(fd_, scratch, n, static_cast<off_t>(offset));
    *result = Slice(scratch, (r < 0) ? 0 : r);
    if (r < 0) {
      // An error: return a non-ok status
      s = IOError(filename_, errno);
    }
    return s;
  }

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Member Data Documentation

fd_

int leveldb::anonymous_namespace{env_posix.cc}::PosixRandomAccessFile::fd_

private

Definition at line 72 of file env_posix.cc.

filename_

std::string leveldb::anonymous_namespace{env_posix.cc}::PosixRandomAccessFile::filename_

private

Definition at line 71 of file env_posix.cc.

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The documentation for this class was generated from the following file:

• util/env_posix.cc