eio_syncfs
  Calls Linux' syncfs syscall, if available
  
 
  Description
  
   resource eio_syncfs
    ( mixed $fd
   [, int $pri = EIO_PRI_DEFAULT
   [, callable $callback = NULL
   [, mixed $data = NULL
  ]]] )
  
  
 
  Parameters
  
   
    - 
fd
- 
     
     File descriptor
      
- 
pri
- 
    The request priority: EIO_PRI_DEFAULT,EIO_PRI_MIN,EIO_PRI_MAX, orNULL.
IfNULLpassed,priinternally is set toEIO_PRI_DEFAULT.
 
- 
callback
- 
     
callbackfunction is called when the request is done.
It should match the following prototype:
 
void callback(mixed $data, int $result[, resource $req]);
 
- 
data
- 
is custom data passed to the request. 
- 
result
- 
request-specific result value; basically, the value returned by corresponding
system call. 
- 
req
- 
is optional request resource which can be used with functions like eio_get_last_error 
 
- 
data
- 
     
     Arbitrary variable passed to callback.
 
 
 
  Return Values
  
   eio_syncfs returns request resource on success or FALSE on error.