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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 COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Programmer: Quincey Koziol <koziol@hdfgroup.org>
* Tuesday, January 8, 2008
*
* Purpose: Free space section callbacks for file.
*
*/
/****************/
/* Module Setup */
/****************/
#define H5F_FRIEND /*suppress error about including H5Fpkg */
#include "H5MVmodule.h" /* This source code file is part of the H5MF module */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5MVpkg.h" /* File memory management */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/* 'simple' section callbacks */
static htri_t H5MV__sect_can_merge(const H5FS_section_info_t *sect1,
const H5FS_section_info_t *sect2, void *udata);
static herr_t H5MV__sect_merge(H5FS_section_info_t **sect1,
H5FS_section_info_t *sect2, void *udata);
static herr_t H5MV__sect_valid(const H5FS_section_class_t *cls,
const H5FS_section_info_t *sect);
static H5FS_section_info_t *H5MV__sect_split(H5FS_section_info_t *sect,
hsize_t frag_size);
/*********************/
/* Package Variables */
/*********************/
/* Class info for "simple" free space sections */
H5FS_section_class_t H5MV_FSPACE_SECT_CLS_SIMPLE[1] = {{
/* Class variables */
H5MV_FSPACE_SECT_SIMPLE, /* Section type */
0, /* Extra serialized size */
H5FS_CLS_MERGE_SYM | H5FS_CLS_ADJUST_OK | H5FS_CLS_GHOST_OBJ, /* Class flags */
NULL, /* Class private info */
/* Class methods */
NULL, /* Initialize section class */
NULL, /* Terminate section class */
/* Object methods */
NULL, /* Add section */
NULL, /* Serialize section */
NULL, /* Deserialize section */
H5MV__sect_can_merge, /* Can sections merge? */
H5MV__sect_merge, /* Merge sections */
H5MV__sect_can_shrink, /* Can section shrink container?*/
H5MV__sect_shrink, /* Shrink container w/section */
H5MV__sect_free, /* Free section */
H5MV__sect_valid, /* Check validity of section */
H5MV__sect_split, /* Split section node for alignment */
NULL, /* Dump debugging for section */
}};
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/* Declare a free list to manage the H5MF_free_section_t struct */
H5FL_DEFINE(H5MV_free_section_t);
/*
* "simple" section callbacks
*/
/*-------------------------------------------------------------------------
* Function: H5MV__sect_new
*
* Purpose: Create a new section and return it to the caller
*
* Return: Pointer to new section on success/NULL on failure
*
*-------------------------------------------------------------------------
*/
H5MV_free_section_t *
H5MV__sect_new(haddr_t sect_off, hsize_t sect_size)
{
H5MV_free_section_t *sect; /* 'Simple' free space section to add */
H5MV_free_section_t *ret_value = NULL; /* Return value */
FUNC_ENTER_PACKAGE
/* Check arguments. */
HDassert(sect_size);
/* Create free space section node */
if(NULL == (sect = H5FL_MALLOC(H5MV_free_section_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for free section node")
/* Set the information passed in */
sect->sect_info.addr = sect_off;
sect->sect_info.size = sect_size;
/* Set the section's class & state */
sect->sect_info.type = H5MV_FSPACE_SECT_SIMPLE;
sect->sect_info.state = H5FS_SECT_LIVE;
/* Set return value */
ret_value = sect;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5MV__sect_new() */
/*-------------------------------------------------------------------------
* Function: H5MV__sect_free
*
* Purpose: Free a 'simple' section node
*
* Return: Success: non-negative
* Failure: negative
*
*-------------------------------------------------------------------------
*/
herr_t
H5MV__sect_free(H5FS_section_info_t *_sect)
{
H5MV_free_section_t *sect = (H5MV_free_section_t *)_sect; /* File free section */
FUNC_ENTER_PACKAGE_NOERR
/* Check arguments. */
HDassert(sect);
/* Release the section */
sect = H5FL_FREE(H5MV_free_section_t, sect);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5MV__sect_free() */
/*-------------------------------------------------------------------------
* Function: H5MV__sect_can_merge
*
* Purpose: Can two sections of this type merge?
*
* Note: Second section must be "after" first section
*
* Return: Success: non-negative (TRUE/FALSE)
* Failure: negative
*
*-------------------------------------------------------------------------
*/
static htri_t
H5MV__sect_can_merge(const H5FS_section_info_t *_sect1,
const H5FS_section_info_t *_sect2, void H5_ATTR_UNUSED *_udata)
{
const H5MV_free_section_t *sect1 = (const H5MV_free_section_t *)_sect1; /* File free section */
const H5MV_free_section_t *sect2 = (const H5MV_free_section_t *)_sect2; /* File free section */
htri_t ret_value = FAIL; /* Return value */
FUNC_ENTER_STATIC_NOERR
/* Check arguments. */
HDassert(sect1);
HDassert(sect2);
HDassert(sect1->sect_info.type == sect2->sect_info.type); /* Checks "MERGE_SYM" flag */
HDassert(H5F_addr_lt(sect1->sect_info.addr, sect2->sect_info.addr));
/* Check if second section adjoins first section */
ret_value = H5F_addr_eq(sect1->sect_info.addr + sect1->sect_info.size, sect2->sect_info.addr);
FUNC_LEAVE_NOAPI(ret_value)
} /* H5MV__sect_can_merge() */
/*-------------------------------------------------------------------------
* Function: H5MV__sect_merge
*
* Purpose: Merge two sections of this type
*
* Note: Second section always merges into first node
*
* Return: Success: non-negative
* Failure: negative
*
*-------------------------------------------------------------------------
*/
static herr_t
H5MV__sect_merge(H5FS_section_info_t **_sect1, H5FS_section_info_t *_sect2,
void H5_ATTR_UNUSED *_udata)
{
H5MV_free_section_t **sect1 = (H5MV_free_section_t **)_sect1; /* File free section */
H5MV_free_section_t *sect2 = (H5MV_free_section_t *)_sect2; /* File free section */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_STATIC
/* Check arguments. */
HDassert(sect1);
HDassert((*sect1)->sect_info.type == H5MV_FSPACE_SECT_SIMPLE);
HDassert(sect2);
HDassert(sect2->sect_info.type == H5MV_FSPACE_SECT_SIMPLE);
HDassert(H5F_addr_eq((*sect1)->sect_info.addr + (*sect1)->sect_info.size, sect2->sect_info.addr));
/* Add second section's size to first section */
(*sect1)->sect_info.size += sect2->sect_info.size;
/* Get rid of second section */
if(H5MV__sect_free((H5FS_section_info_t *)sect2) < 0)
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't free section node")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5MV__sect_merge() */
/*-------------------------------------------------------------------------
* Function: H5MV__sect_can_shrink
*
* Purpose: Can this section shrink the container?
*
* Return: Success: non-negative (TRUE/FALSE)
* Failure: negative
*
*-------------------------------------------------------------------------
*/
htri_t
H5MV__sect_can_shrink(const H5FS_section_info_t *_sect, void *_udata)
{
const H5MV_free_section_t *sect = (const H5MV_free_section_t *)_sect; /* File free section */
H5F_t *f = (H5F_t *)_udata;
H5F_shared_t *shared = f->shared;
haddr_t eoa; /* End of address space in the file */
haddr_t end; /* End of section to extend */
htri_t ret_value = FALSE; /* Return value */
FUNC_ENTER_STATIC
/* Check arguments. */
HDassert(sect);
/* Retrieve the end oa the file's address space */
if(HADDR_UNDEF == (eoa = H5MV_get_vfd_swmr_md_eoa(shared)))
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTGET, FAIL, "get_eoa request for VFD SWMR metadata file failed")
/* Compute address of end of section to check */
end = sect->sect_info.addr + sect->sect_info.size;
/* Check if the section is exactly at the end of the allocated space in the file */
if(H5F_addr_eq(end, eoa))
/* Indicate shrinking can occur */
ret_value = TRUE;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5MV__sect_can_shrink() */
/*-------------------------------------------------------------------------
* Function: H5MV__sect_shrink
*
* Purpose: Shrink container with section
*
* Return: Success: non-negative
* Failure: negative
*
*-------------------------------------------------------------------------
*/
herr_t
H5MV__sect_shrink(H5FS_section_info_t **_sect, void *_udata)
{
H5F_t *f = (H5F_t *)_udata;
H5F_shared_t *shared = f->shared;
H5MV_free_section_t **sect = (H5MV_free_section_t **)_sect; /* File free section */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_STATIC
/* Check arguments. */
HDassert(sect);
HDassert(H5F_SHARED_INTENT(shared) & H5F_ACC_RDWR);
/* Release section's space at EOA */
if(H5MV__free_md(shared, (*sect)->sect_info.addr, (*sect)->sect_info.size) < 0)
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "free request for VFD SWMR metadata file failed")
/* Free the section */
if(H5MV__sect_free(&(*sect)->sect_info) < 0)
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't free simple section node")
/* Mark section as freed, for free space manager */
*sect = NULL;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5MV__sect_shrink() */
/*-------------------------------------------------------------------------
* Function: H5MV__sect_valid
*
* Purpose: Check the validity of a section
*
* Return: Success: non-negative
* Failure: negative
*
*-------------------------------------------------------------------------
*/
static herr_t
H5MV__sect_valid(const H5FS_section_class_t H5_ATTR_UNUSED *cls, const H5FS_section_info_t *_sect)
{
const H5MV_free_section_t *sect = (const H5MV_free_section_t *)_sect; /* File free section */
FUNC_ENTER_STATIC_NOERR
/* Check arguments. */
HDassert(sect);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5MV__sect_valid() */
/*-------------------------------------------------------------------------
* Function: H5MV__sect_split
*
* Purpose: Split SECT into 2 sections: fragment for alignment & the aligned section
* SECT's addr and size are updated to point to the aligned section
*
* Return: Success: the fragment for aligning sect
* Failure: null
*
*-------------------------------------------------------------------------
*/
static H5FS_section_info_t *
H5MV__sect_split(H5FS_section_info_t *sect, hsize_t frag_size)
{
H5MV_free_section_t *ret_value = NULL; /* Return value */
FUNC_ENTER_STATIC
/* Allocate space for new section */
if(NULL == (ret_value = H5MV__sect_new(sect->addr, frag_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, NULL, "can't initialize free space section")
/* Set new section's info */
sect->addr += frag_size;
sect->size -= frag_size;
done:
FUNC_LEAVE_NOAPI((H5FS_section_info_t *)ret_value)
} /* end H5MV__sect_split() */
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