#ifndef MPLIB1_LOCKFILE
#define MPLIB1_LOCKFILE
/*
*******************************************************************************
*  Copyright (c) 1996 Martin Poole                            *
*******************************************************************************
**
** WARNING !!  WARNING !! WARNING !! WARNING !! WARNING !! WARNING !!
**
** Any changes to be made to this file should first be checked with
** mplib1 source control for library integrity.
**
** mplib1 source control can be reached at  mplib1@quatermass.co.uk
** 
*
*  $Source$
*  $Author$
*  $Date$
*  $Revision$
*  Purpose        :
*
*******************************************************************************
*
* Change History
*
* $Log$
*
*******************************************************************************
*/

#ident "$Header$"

#ifdef CXREF
#include <sys/types.h>
#endif

/* ------------------------------------------------------------------
    defines
   ------------------------------------------------------------------ */

#define read_lock(fd,offset,whence,len) lock_reg(fd,F_SETLK,F_RDLCK,offset,whence,len)
#define readw_lock(fd,offset,whence,len) lock_reg(fd,F_SETLKW,F_RDLCK,offset,whence,len)
#define write_lock(fd,offset,whence,len) lock_reg(fd,F_SETLK,F_WRLCK,offset,whence,len)
#define writew_lock(fd,offset,whence,len) lock_reg(fd,F_SETLKW,F_WRLCK,offset,whence,len)
#define un_lock(fd,offset,whence,len) lock_reg(fd,F_SETLK,F_UNLCK,offset,whence,len)

/* ------------------------------------------------------------------
    structures
   ------------------------------------------------------------------ */

/* ------------------------------------------------------------------
    function definitions
   ------------------------------------------------------------------ */

extern int
lock_reg( int fd, int cmd, short type, off_t offset, short whence, off_t len );

extern int
lock_file( const char *filename );

#endif
/* -- End of File -- */