/*-------------------------------------------------------------------------
 * Copyright (C) 1997	National Center for Supercomputing Applications.
 *                      All rights reserved.
 *
 *-------------------------------------------------------------------------
 *
 * Created:		H5MF.c
 * 			Jul 11 1997
 * 			Robb Matzke <matzke@llnl.gov>
 *
 * Purpose:		File memory management functions.
 *
 * Modifications:
 *
 * 	Robb Matzke, 5 Aug 1997
 *	Added calls to H5E.
 *
 *-------------------------------------------------------------------------
 */
#include <H5private.h>
#include <H5Eprivate.h>
#include <H5Fprivate.h>
#include <H5MFprivate.h>

#define PABLO_MASK	H5MF_mask

/* Is the interface initialized? */
static intn interface_initialize_g = FALSE;
#define INTERFACE_INIT	NULL


/*-------------------------------------------------------------------------
 * Function:	H5MF_alloc
 *
 * Purpose:	Allocate at least SIZE bytes of file memory and return
 *		the address where that contiguous chunk of file memory
 *		exists. The allocation operation should be either H5MF_META or
 *		H5MF_RAW depending on the purpose for which the storage is
 *		being requested.
 *
 * Return:	Success:	SUCCEED.  The file address of new chunk is
 *				returned through the ADDR argument.
 *
 *		Failure:	FAIL
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Jul 11 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5MF_alloc (H5F_t *f, intn op, size_t size, haddr_t *addr/*out*/)
{
   haddr_t	tmp_addr;
   
   FUNC_ENTER (H5MF_alloc, FAIL);

   /* check arguments */
   assert (f);
   assert (H5MF_META==op || H5MF_RAW==op);
   assert (size>0);
   assert (addr);

   /*
    * Eventually we'll maintain a free list(s) and try to satisfy requests
    * from there.  But for now we just allocate more memory from the end of
    * the file.
    */
   if (H5F_low_extend (f->shared->lf, op, size, addr/*out*/)<0) {
      HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL,
		     "low level mem management failed");
   }
   /* Convert from absolute to relative */
   addr->offset -= f->shared->base_addr.offset;

   /* Did we extend the size of the hdf5 data? */
   tmp_addr = *addr;
   H5F_addr_inc (&tmp_addr, size);
   if (H5F_addr_gt (&tmp_addr, &(f->shared->hdf5_eof))) {
      f->shared->hdf5_eof = tmp_addr;
   }
   
   FUNC_LEAVE (SUCCEED);
}


/*-------------------------------------------------------------------------
 * Function:	H5MF_free
 *
 * Purpose:	Frees part of a file, making that part of the file
 *		available for reuse.
 *
 * Note:	This version of the function doesn't do anything.
 *
 * Return:	Success:	0
 *
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *		matzke@llnl.gov
 *		Jul 17 1997
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5MF_free (H5F_t *f, const haddr_t *addr, size_t size)
{
   FUNC_ENTER (H5MF_free, FAIL);

   /* check arguments */
   assert (f);
   if (!addr || !H5F_addr_defined (addr) || 0==size) HRETURN (SUCCEED);
   assert (!H5F_addr_zerop (addr));

#ifndef NDEBUG
   fprintf (stderr, "H5MF_free: lost %lu bytes of file storage\n",
	    (unsigned long)size);
#endif

   FUNC_LEAVE (SUCCEED);
}