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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: H5Cepoch.c
* June 5 2004
* Quincey Koziol
*
* Purpose: Metadata cache epoch callbacks.
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#include "H5Cmodule.h" /* This source code file is part of the H5C module */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Cpkg.h" /* Cache */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Local Prototypes */
/********************/
/****************************************************************************
*
* declarations for epoch marker cache entries.
*
* As a strategy for automatic cache size reduction, the cache may insert
* marker entries in the LRU list at the end of each epoch. These markers
* are then used to identify entries that have not been accessed for n
* epochs so that they can be evicted from the cache.
*
****************************************************************************/
static herr_t H5C__epoch_marker_get_load_size(const void *udata_ptr,
size_t *image_len_ptr);
static void * H5C__epoch_marker_deserialize(const void * image_ptr,
size_t len, void * udata, hbool_t * dirty_ptr);
static herr_t H5C__epoch_marker_image_len(const void * thing,
size_t *image_len_ptr);
static herr_t H5C__epoch_marker_pre_serialize(const H5F_t *f,
hid_t dxpl_id, void * thing, haddr_t addr, size_t len,
haddr_t * new_addr_ptr, size_t * new_len_ptr, unsigned * flags_ptr);
static herr_t H5C__epoch_marker_serialize(const H5F_t *f,
void * image_ptr, size_t len, void * thing);
static herr_t H5C__epoch_marker_notify(H5C_notify_action_t action, void *thing);
static herr_t H5C__epoch_marker_free_icr(void * thing);
static herr_t H5C__epoch_marker_fsf_size(const void H5_ATTR_UNUSED * thing,
size_t H5_ATTR_UNUSED * fsf_size_ptr);
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
const H5C_class_t H5C__epoch_marker_class =
{
/* id = */ H5C__EPOCH_MARKER_TYPE,
/* name = */ "epoch marker",
/* mem_type = */ H5FD_MEM_DEFAULT, /* value doesn't matter */
/* flags = */ H5C__CLASS_NO_FLAGS_SET,
/* get_load_size = */ H5C__epoch_marker_get_load_size,
/* deserialize = */ H5C__epoch_marker_deserialize,
/* image_len = */ H5C__epoch_marker_image_len,
/* pre_serialize = */ H5C__epoch_marker_pre_serialize,
/* serialize = */ H5C__epoch_marker_serialize,
/* notify = */ H5C__epoch_marker_notify,
/* free_icr = */ H5C__epoch_marker_free_icr,
/* fsf_size = */ H5C__epoch_marker_fsf_size,
};
/***************************************************************************
* Class functions for H5C__EPOCH_MAKER_TYPE:
*
* None of these functions should ever be called, so there is no point in
* documenting them separately.
* JRM - 11/16/04
*
***************************************************************************/
static herr_t
H5C__epoch_marker_get_load_size(const void H5_ATTR_UNUSED *udata_ptr,
size_t H5_ATTR_UNUSED *image_len_ptr)
{
FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
HERROR(H5E_CACHE, H5E_SYSTEM, "called unreachable fcn.");
FUNC_LEAVE_NOAPI(FAIL)
} /* end H5C__epoch_marker_get_load_size() */
static void *
H5C__epoch_marker_deserialize(const void H5_ATTR_UNUSED * image_ptr, size_t H5_ATTR_UNUSED len,
void H5_ATTR_UNUSED * udata, hbool_t H5_ATTR_UNUSED * dirty_ptr)
{
FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
HERROR(H5E_CACHE, H5E_SYSTEM, "called unreachable fcn.");
FUNC_LEAVE_NOAPI(NULL)
} /* end H5C__epoch_marker_deserialize() */
static herr_t
H5C__epoch_marker_image_len(const void H5_ATTR_UNUSED *thing,
size_t H5_ATTR_UNUSED *image_len_ptr)
{
FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
HERROR(H5E_CACHE, H5E_SYSTEM, "called unreachable fcn.");
FUNC_LEAVE_NOAPI(FAIL)
} /* end H5C__epoch_marker_image_len() */
static herr_t
H5C__epoch_marker_pre_serialize(const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
void H5_ATTR_UNUSED *thing, haddr_t H5_ATTR_UNUSED addr, size_t H5_ATTR_UNUSED len,
haddr_t H5_ATTR_UNUSED *new_addr_ptr, size_t H5_ATTR_UNUSED *new_len_ptr,
unsigned H5_ATTR_UNUSED *flags_ptr)
{
FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
HERROR(H5E_CACHE, H5E_SYSTEM, "called unreachable fcn.");
FUNC_LEAVE_NOAPI(FAIL)
} /* end H5C__epoch_marker_pre_serialize() */
static herr_t
H5C__epoch_marker_serialize(const H5F_t H5_ATTR_UNUSED *f, void H5_ATTR_UNUSED *image_ptr,
size_t H5_ATTR_UNUSED len, void H5_ATTR_UNUSED *thing)
{
FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
HERROR(H5E_CACHE, H5E_SYSTEM, "called unreachable fcn.");
FUNC_LEAVE_NOAPI(FAIL)
} /* end H5C__epoch_marker_serialize() */
static herr_t
H5C__epoch_marker_notify(H5C_notify_action_t H5_ATTR_UNUSED action,
void H5_ATTR_UNUSED * thing)
{
FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
HERROR(H5E_CACHE, H5E_SYSTEM, "called unreachable fcn.");
FUNC_LEAVE_NOAPI(FAIL)
} /* end H5C__epoch_marker_notify() */
static herr_t
H5C__epoch_marker_free_icr(void H5_ATTR_UNUSED * thing)
{
FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
HERROR(H5E_CACHE, H5E_SYSTEM, "called unreachable fcn.");
FUNC_LEAVE_NOAPI(FAIL)
} /* end H5C__epoch_marker_free_icr() */
static herr_t
H5C__epoch_marker_fsf_size(const void H5_ATTR_UNUSED * thing, size_t H5_ATTR_UNUSED *fsf_size_ptr)
{
FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
HERROR(H5E_CACHE, H5E_SYSTEM, "called unreachable fcn.");
FUNC_LEAVE_NOAPI(FAIL)
} /* end H5C__epoch_marker_fsf_size() */
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