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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5MF.c
* Jul 11 1997
* Robb Matzke <matzke@llnl.gov>
*
* Purpose: File memory management functions.
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#define H5F_PACKAGE /*suppress error about including H5Fpkg */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5MFprivate.h" /* File memory management */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
static hbool_t H5MF_alloc_overflow(H5F_t *f, hsize_t size);
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5MF_alloc
*
* Purpose: Allocate SIZE bytes of file memory and return the relative
* address where that contiguous chunk of file memory exists.
* The TYPE argument describes the purpose for which the storage
* is being requested.
*
* Return: Success: The file address of new chunk.
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 11 1997
*
*-------------------------------------------------------------------------
*/
haddr_t
H5MF_alloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, hsize_t size)
{
haddr_t ret_value;
FUNC_ENTER_NOAPI(H5MF_alloc, HADDR_UNDEF)
/* check arguments */
HDassert(f);
HDassert(size > 0);
/* Fail if we don't have write access */
if(0 == (f->intent & H5F_ACC_RDWR))
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, HADDR_UNDEF, "file is read-only")
/* Allocate space from the virtual file layer */
if(HADDR_UNDEF == (ret_value = H5FD_alloc(f->shared->lf, type, dxpl_id, size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "file allocation failed")
/* Convert absolute file address to relative file address */
HDassert(ret_value >= f->shared->base_addr);
/* Set return value */
ret_value -= f->shared->base_addr;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5MF_alloc() */
/*-------------------------------------------------------------------------
* Function: H5MF_xfree
*
* Purpose: Frees part of a file, making that part of the file
* available for reuse.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 17 1997
*
*-------------------------------------------------------------------------
*/
herr_t
H5MF_xfree(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOFUNC(H5MF_xfree)
/* check arguments */
HDassert(f);
if(!H5F_addr_defined(addr) || 0 == size)
HGOTO_DONE(SUCCEED);
HDassert(addr != 0);
/* Convert relative address to absolute address */
addr += f->shared->base_addr;
/* Allow virtual file layer to free block */
if(H5FD_free(f->shared->lf, type, dxpl_id, addr, size) < 0) {
#ifdef H5MF_DEBUG
if(H5DEBUG(MF))
fprintf(H5DEBUG(MF), "H5MF_free: lost %lu bytes of file storage\n", (unsigned long)size);
#endif
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5MF_xfree() */
/*-------------------------------------------------------------------------
* Function: H5MF_realloc
*
* Purpose: Changes the size of an allocated chunk, possibly moving it to
* a new address. The chunk to change is at address OLD_ADDR
* and is exactly OLD_SIZE bytes (if these are H5F_ADDR_UNDEF
* and zero then this function acts like H5MF_alloc). The new
* size will be NEW_SIZE and its address is the return value (if
* NEW_SIZE is zero then this function acts like H5MF_free and
* an undefined address is returned).
*
* If the new size is less than the old size then the new
* address will be the same as the old address (except for the
* special case where the new size is zero).
*
* If the new size is more than the old size then most likely a
* new address will be returned. However, under certain
* circumstances the library may return the same address.
*
* Return: Success: The relative file address of the new block.
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* Thursday, April 16, 1998
*
*-------------------------------------------------------------------------
*/
haddr_t
H5MF_realloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, haddr_t old_addr, hsize_t old_size,
hsize_t new_size)
{
haddr_t ret_value;
FUNC_ENTER_NOAPI(H5MF_realloc, HADDR_UNDEF)
/* Convert old relative address to absolute address */
old_addr += f->shared->base_addr;
/* Reallocate memory from the virtual file layer */
ret_value = H5FD_realloc(f->shared->lf, type, dxpl_id, old_addr, old_size, new_size);
if(HADDR_UNDEF == ret_value)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "unable to allocate new file memory")
/* Convert return value to relative address */
HDassert(ret_value >= f->shared->base_addr);
/* Set return value */
ret_value -= f->shared->base_addr;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5MF_realloc() */
/*-------------------------------------------------------------------------
* Function: H5MF_alloc_overflow
*
* Purpose: Checks if an allocation of file space would cause an overflow.
* F is the file whose space is being allocated, SIZE is the amount
* of space needed.
*
* Return: FALSE if no overflow would result
* TRUE if overflow would result (the allocation should not be allowed)
*
* Programmer: James Laird
* Nat Furrer
* Tuesday, June 1, 2004
*
*-------------------------------------------------------------------------
*/
static hbool_t
H5MF_alloc_overflow(H5F_t *f, hsize_t size)
{
haddr_t eoa; /* End-of-allocation in the file */
haddr_t space_avail; /* Unallocated space still available in file */
hbool_t ret_value; /* Return value */
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5MF_alloc_overflow)
/* Start with the current end of the file's address. */
eoa = H5F_get_eoa(f);
HDassert(H5F_addr_defined(eoa));
/* Subtract EOA from the file's maximum address to get the actual amount of
* addressable space left in the file.
*/
HDassert(f->shared->maxaddr >= eoa);
space_avail = (hsize_t)(f->shared->maxaddr - eoa);
/* Ensure that there's enough room left in the file for something of this size */
if(size > space_avail)
ret_value = TRUE;
else
ret_value = FALSE;
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5MF_alloc_overflow() */
/*-------------------------------------------------------------------------
* Function: H5MF_can_extend
*
* Purpose: Check if a block in the file can be extended.
*
* Return: Success: TRUE(1)/FALSE(0)
* Failure: FAIL
*
* Programmer: Quincey Koziol
* Friday, June 11, 2004
*
*-------------------------------------------------------------------------
*/
htri_t
H5MF_can_extend(H5F_t *f, H5FD_mem_t type, haddr_t addr, hsize_t size, hsize_t extra_requested)
{
htri_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5MF_can_extend, FAIL)
/* Convert old relative address to absolute address */
addr += H5F_BASE_ADDR(f);
/* Pass the request down to the virtual file layer */
if((ret_value = H5FD_can_extend(f->shared->lf, type, addr, size, extra_requested)) < 0)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate new file memory");
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5MF_can_extend() */
/*-------------------------------------------------------------------------
* Function: H5MF_extend
*
* Purpose: Extend a block in the file.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* Saturday, June 12, 2004
*
*-------------------------------------------------------------------------
*/
herr_t
H5MF_extend(H5F_t *f, H5FD_mem_t type, haddr_t addr, hsize_t size, hsize_t extra_requested)
{
herr_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5MF_extend, FAIL)
/* Convert relative address to absolute address */
addr += H5F_BASE_ADDR(f);
/* Pass the request down to the virtual file layer */
if((ret_value = H5FD_extend(f->shared->lf, type, addr, size, extra_requested)) < 0)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate new file memory")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5MF_extend() */
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