IOFlags.h

Go to the documentation of this file.

#ifndef STORAGE_FACTORY_IO_FLAGS_H
#define STORAGE_FACTORY_IO_FLAGS_H

namespace edm::storage {

  namespace IOFlags {
    enum OpenMode {
      OpenRead = 1,        /*< Open for read access.  */
      OpenWrite = 2,       /*< Open for write access.  */
      OpenNonBlock = 4,    /*< Open in non-blocking mode.
                    Neither the #open() nor any
                    subsequent operation on the
                    returned descriptor cause the
                    process to wait.  Applied to
                    opening a named pipe (a FIFO)
                    allows the pipe to be opened
                    without waiting for the other end
                    to be connected.  */
      OpenAppend = 8,      /*< Writes to the file should always
                    append to the end of the file.  */
      OpenUnbuffered = 16, /*< No write caching should be done on
                    this file; may result in blocking
                    the process until the data has
                    actually been written.  */
      OpenCreate = 32,     /*< Create the file if it does not exist.  */
      OpenExclusive = 64,  /*< With #ModeCreate specifies that
                    the creation should fali if the
                    file exists.  */
      OpenTruncate = 128,  /*< If the file exists, truncate it to
                    zero size.  */
      OpenNotCTTY = 256,   /*< If the specified file is a
                    terminal device, do not make it
                    the controlling terminal for the
                    process even if the process does
                    not have one yet.  */
      OpenWrap = 512       /*< Wrap the file if at all possible
                    with a local file.  */
    };
  }  // namespace IOFlags
}  // namespace edm::storage
#endif  // STORAGE_FACTORY_IO_FLAGS_H