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Diffstat (limited to 'src/H5Pmapl.c')
| -rw-r--r-- | src/H5Pmapl.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/src/H5Pmapl.c b/src/H5Pmapl.c new file mode 100644 index 0000000..fe5be0f --- /dev/null +++ b/src/H5Pmapl.c @@ -0,0 +1,217 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +/*------------------------------------------------------------------------- + * + * Purpose: Map access property list class routines + * + *------------------------------------------------------------------------- + */ + +/****************/ +/* Module Setup */ +/****************/ + +#include "H5Pmodule.h" /* This source code file is part of the H5P module */ + + +/***********/ +/* Headers */ +/***********/ +#include "H5private.h" /* Generic Functions */ +#include "H5Mprivate.h" /* Maps */ +#include "H5Eprivate.h" /* Error handling */ +#include "H5Iprivate.h" /* IDs */ +#include "H5Ppkg.h" /* Property lists */ + + +/****************/ +/* Local Macros */ +/****************/ + +/* ========= Map Access properties ============ */ +/* Definitions for key prefetch size */ +#define H5M_ACS_KEY_PREFETCH_SIZE_SIZE sizeof(size_t) +#define H5M_ACS_KEY_PREFETCH_SIZE_DEF (size_t)(16 * 1024) +#define H5M_ACS_KEY_PREFETCH_SIZE_ENC H5P__encode_size_t +#define H5M_ACS_KEY_PREFETCH_SIZE_DEC H5P__decode_size_t +/* Definition for key prefetch buffer size */ +#define H5M_ACS_KEY_ALLOC_SIZE_SIZE sizeof(size_t) +#define H5M_ACS_KEY_ALLOC_SIZE_DEF (size_t)(1024 * 1024) +#define H5M_ACS_KEY_ALLOC_SIZE_ENC H5P__encode_size_t +#define H5M_ACS_KEY_ALLOC_SIZE_DEC H5P__decode_size_t + + +/******************/ +/* Local Typedefs */ +/******************/ + + +/********************/ +/* Package Typedefs */ +/********************/ + + +/********************/ +/* Local Prototypes */ +/********************/ + +/* Property class callbacks */ +static herr_t H5P__macc_reg_prop(H5P_genclass_t *pclass); + + +/*********************/ +/* Package Variables */ +/*********************/ + +/* Map access property list class library initialization object */ +const H5P_libclass_t H5P_CLS_MACC[1] = {{ + "map access", /* Class name for debugging */ + H5P_TYPE_MAP_ACCESS, /* Class type */ + + &H5P_CLS_LINK_ACCESS_g, /* Parent class */ + &H5P_CLS_MAP_ACCESS_g, /* Pointer to class */ + &H5P_CLS_MAP_ACCESS_ID_g, /* Pointer to class ID */ + &H5P_LST_MAP_ACCESS_ID_g, /* Pointer to default property list ID */ + H5P__macc_reg_prop, /* Default property registration routine */ + + NULL, /* Class creation callback */ + NULL, /* Class creation callback info */ + NULL, /* Class copy callback */ + NULL, /* Class copy callback info */ + NULL, /* Class close callback */ + NULL /* Class close callback info */ +}}; + + +/*****************************/ +/* Library Private Variables */ +/*****************************/ + + +/*******************/ +/* Local Variables */ +/*******************/ + + + +/*------------------------------------------------------------------------- + * Function: H5P__macc_reg_prop + * + * Purpose: Register the map access property list class's + * properties + * + * Return: Non-negative on success/Negative on failure + *------------------------------------------------------------------------- + */ +static herr_t +H5P__macc_reg_prop(H5P_genclass_t *pclass) +{ + size_t key_prefetch_size = H5M_ACS_KEY_PREFETCH_SIZE_DEF; /* Default key prefetch size for iteration */ + size_t key_alloc_size = H5M_ACS_KEY_ALLOC_SIZE_DEF; /* Default key prefetch allocation size for iteration */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_STATIC + + /* Register the key prefetch size for iteration */ + if(H5P__register_real(pclass, H5M_ACS_KEY_PREFETCH_SIZE_NAME, H5M_ACS_KEY_PREFETCH_SIZE_SIZE, &key_prefetch_size, + NULL, NULL, NULL, H5M_ACS_KEY_PREFETCH_SIZE_ENC, H5M_ACS_KEY_PREFETCH_SIZE_DEC, NULL, NULL, NULL, NULL) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class") + + /* Register the key prefetch allocation size for iteration */ + if(H5P__register_real(pclass, H5M_ACS_KEY_ALLOC_SIZE_NAME, H5M_ACS_KEY_ALLOC_SIZE_SIZE, &key_alloc_size, + NULL, NULL, NULL, H5M_ACS_KEY_ALLOC_SIZE_ENC, H5M_ACS_KEY_ALLOC_SIZE_DEC, NULL, NULL, NULL, NULL) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class") + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5P__macc_reg_prop() */ + + +/*------------------------------------------------------------------------- + * Function: H5Pset_map_iterate_hints + * + * Purpose: H5Pset_map_iterate_hints adjusts the behavior of + * H5Miterate when prefetching keys for iteration. The + * KEY_PREFETCH_SIZE parameter specifies the number of keys + * to prefetch at a time during iteration. The KEY_ALLOC_SIZE + * parameter specifies the initial size of the buffer + * allocated to hold these prefetched keys. If this buffer is + * too small it will be reallocated to a larger size, though + * this may result in an additional I/O. + * + * Move to DAOS VOL code? DSINC + * + * Return: Non-negative on success/Negative on failure + *------------------------------------------------------------------------- + */ +herr_t +H5Pset_map_iterate_hints(hid_t mapl_id, size_t key_prefetch_size, size_t key_alloc_size) +{ + H5P_genplist_t *plist; /* Property list pointer */ + herr_t ret_value = SUCCEED; /* return value */ + + FUNC_ENTER_API(FAIL) + H5TRACE3("e", "izz", mapl_id, key_prefetch_size, key_alloc_size); + + /* Get the plist structure */ + if(NULL == (plist = H5P_object_verify(mapl_id, H5P_MAP_ACCESS))) + HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID"); + + /* Set sizes */ + if(H5P_set(plist, H5M_ACS_KEY_PREFETCH_SIZE_NAME, &key_prefetch_size) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTSET,FAIL, "can't set key prefetch size"); + if(H5P_set(plist, H5M_ACS_KEY_ALLOC_SIZE_NAME, &key_alloc_size) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTSET,FAIL, "can't set key allocation size"); + +done: + FUNC_LEAVE_API(ret_value) +} /* end H5Pset_map_iterate_hints() */ + + +/*------------------------------------------------------------------------- + * Function: H5Pget_map_iterate_hints + * + * Purpose: Returns the map iterate hints, KEY_PREFETCH_SIZE and + * KEY_ALLOC_SIZE, as set by H5Pset_map_iterate_hints. + * + * Return: Non-negative on success/Negative on failure + *------------------------------------------------------------------------- + */ +herr_t +H5Pget_map_iterate_hints(hid_t mapl_id, size_t *key_prefetch_size, size_t *key_alloc_size) +{ + H5P_genplist_t *plist; /* Property list pointer */ + herr_t ret_value = SUCCEED; /* return value */ + + FUNC_ENTER_API(FAIL) + H5TRACE3("e", "i*z*z", mapl_id, key_prefetch_size, key_alloc_size); + + /* Get the plist structure */ + if(NULL == (plist = H5P_object_verify(mapl_id, H5P_MAP_ACCESS))) + HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID"); + + /* Get the properties */ + if(key_prefetch_size) { + if(H5P_get(plist, H5M_ACS_KEY_PREFETCH_SIZE_NAME, key_prefetch_size) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get key prefetch size"); + } /* end if */ + if(key_alloc_size) { + if(H5P_get(plist, H5M_ACS_KEY_ALLOC_SIZE_NAME, key_alloc_size) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get key allocation size"); + } /* end if */ + +done: + FUNC_LEAVE_API(ret_value) +} /* end H5Pget_map_iterate_hints() */ + |