DosBufReset

This call flushes a requesting process's cache buffers for a specific file handle or for all file handles attached to that process. This call is also used with the handle of a named pipe to synchronize a dialog between communicating processes.

DosBufReset

(FileHandle)

FileHandle (HFILE) - input

File handle whose buffers are to be flushed. If FileHandle = 0xFFFFH, all of the process's file handles are flushed.
rc (USHORT) - return
Return code descriptions are:
• NO_ERROR 2
  ERROR_FILE_NOT_FOUND
  5
  ERROR_ACCESS_DENIED
  6
  ERROR_INVALID_HANDLE
  Remarks

  Upon issuing DosBufReset for a file handle, the file's buffers are flushed to disk and its directory entry updated as if the file had been closed; however the file remains in an open state.

  Usage of this call to write out all files belonging to the requesting process should be administered with caution. When the files reside on removable media (diskettes), a call to DosBufReset could have the undesirable effect of requiring the user to insert and remove a large number of diskettes.

  
  Named Pipe Considerations

  Issuing DosBufReset for a named pipe performs an operation that is analogous to forcing the buffer cache to disk. The request blocks the calling process at one end of the pipe until all data it has written has been read at the other end of the pipe.

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