212   long fileSize();

   212   long fileSize();

   213   void rewind() { ::rewind(_file); }

   213   void rewind() { ::rewind(_file); }

   214   void flush();

   214   void flush();

   215 };

   215 };

   216 

   216 

   217 // unlike fileStream, fdStream does unbuffered I/O by calling

   219 // unlike fileStream, fdStream does unbuffered I/O by calling

   218 // open() and write() directly. It is async-safe, but output

   220 // open() and write() directly. It is async-safe, but output

   219 // from multiple thread may be mixed together. Used by fatal

   221 // from multiple thread may be mixed together. Used by fatal

   220 // error handler.

   222 // error handler.

   221 class fdStream : public outputStream {

   223 class fdStream : public outputStream {