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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* 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://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5PBprivate.h
*
*-------------------------------------------------------------------------
*/
#ifndef H5PBprivate_H
#define H5PBprivate_H
/* Private headers needed by this header */
#include "H5private.h" /* Generic Functions */
#include "H5Fprivate.h" /* File access */
#include "H5FLprivate.h" /* Free Lists */
#include "H5SLprivate.h" /* Skip List */
/**************************/
/* Library Private Macros */
/**************************/
/****************************/
/* Library Private Typedefs */
/****************************/
/* Forward declaration for a page buffer entry */
struct H5PB_entry_t;
/* Typedef for the main structure for the page buffer */
typedef struct H5PB_t {
size_t max_size; /* The total page buffer size */
size_t page_size; /* Size of a single page */
unsigned min_meta_perc; /* Minimum ratio of metadata entries required before evicting meta entries */
unsigned min_raw_perc; /* Minimum ratio of raw data entries required before evicting raw entries */
unsigned meta_count; /* Number of entries for metadata */
unsigned raw_count; /* Number of entries for raw data */
unsigned min_meta_count; /* Minimum # of entries for metadata */
unsigned min_raw_count; /* Minimum # of entries for raw data */
H5SL_t *slist_ptr; /* Skip list with all the active page entries */
H5SL_t *mf_slist_ptr; /* Skip list containing newly allocated page entries inserted from the MF layer */
size_t LRU_list_len; /* Number of entries in the LRU (identical to slist_ptr count) */
struct H5PB_entry_t *LRU_head_ptr; /* Head pointer of the LRU */
struct H5PB_entry_t *LRU_tail_ptr; /* Tail pointer of the LRU */
H5FL_fac_head_t *page_fac; /* Factory for allocating pages */
/* Statistics */
unsigned accesses[2];
unsigned hits[2];
unsigned misses[2];
unsigned evictions[2];
unsigned bypasses[2];
} H5PB_t;
/*****************************/
/* Library-private Variables */
/*****************************/
/***************************************/
/* Library-private Function Prototypes */
/***************************************/
/* General routines */
H5_DLL herr_t H5PB_create(H5F_shared_t *f_sh, size_t page_buffer_size, unsigned page_buf_min_meta_perc,
unsigned page_buf_min_raw_perc);
H5_DLL herr_t H5PB_flush(H5F_shared_t *f_sh);
H5_DLL herr_t H5PB_dest(H5F_shared_t *f_sh);
H5_DLL herr_t H5PB_add_new_page(H5F_shared_t *f_sh, H5FD_mem_t type, haddr_t page_addr);
H5_DLL herr_t H5PB_update_entry(H5PB_t *page_buf, haddr_t addr, size_t size, const void *buf);
H5_DLL herr_t H5PB_remove_entry(const H5F_shared_t *f_sh, haddr_t addr);
H5_DLL herr_t H5PB_read(H5F_shared_t *f_sh, H5FD_mem_t type, haddr_t addr, size_t size, void *buf /*out*/);
H5_DLL herr_t H5PB_write(H5F_shared_t *f_sh, H5FD_mem_t type, haddr_t addr, size_t size, const void *buf);
H5_DLL herr_t H5PB_enabled(H5F_shared_t *f_sh, H5FD_mem_t type, bool *enabled);
/* Statistics routines */
H5_DLL herr_t H5PB_reset_stats(H5PB_t *page_buf);
H5_DLL herr_t H5PB_get_stats(const H5PB_t *page_buf, unsigned accesses[2], unsigned hits[2],
unsigned misses[2], unsigned evictions[2], unsigned bypasses[2]);
H5_DLL herr_t H5PB_print_stats(const H5PB_t *page_buf);
#endif /* H5PBprivate_H */
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