/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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://support.hdfgroup.org/ftp/HDF5/releases. * * If you do not have access to either file, you may request a copy from * * help@hdfgroup.org. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* * This file contains public declarations for authoring VOL connectors. */ #ifndef _H5VLconnector_H #define _H5VLconnector_H /* Public headers needed by this file */ #include "H5public.h" /* Generic Functions */ #include "H5Apublic.h" /* Attributes */ #include "H5ESpublic.h" /* Event Stack */ #include "H5Fpublic.h" /* Files */ #include "H5Ipublic.h" /* IDs */ #include "H5Lpublic.h" /* Links */ #include "H5Opublic.h" /* Objects */ #include "H5Rpublic.h" /* References */ #include "H5VLpublic.h" /* Virtual Object Layer */ /*****************/ /* Public Macros */ /*****************/ /* Capability flags for connector */ #define H5VL_CAP_FLAG_NONE 0 /* No special connector capabilities */ #define H5VL_CAP_FLAG_THREADSAFE 0x01 /* Connector is threadsafe */ /* Container info version */ #define H5VL_CONTAINER_INFO_VERSION 0x01 /* Container info struct version */ /* The maximum size allowed for blobs */ #define H5VL_MAX_BLOB_ID_SIZE (16) /* Allow for 128-bits blob IDs */ /*******************/ /* Public Typedefs */ /*******************/ /* types for attribute GET callback */ typedef enum H5VL_attr_get_t { H5VL_ATTR_GET_ACPL, /* creation property list */ H5VL_ATTR_GET_INFO, /* info */ H5VL_ATTR_GET_NAME, /* access property list */ H5VL_ATTR_GET_SPACE, /* dataspace */ H5VL_ATTR_GET_STORAGE_SIZE, /* storage size */ H5VL_ATTR_GET_TYPE /* datatype */ } H5VL_attr_get_t; /* types for attribute SPECFIC callback */ typedef enum H5VL_attr_specific_t { H5VL_ATTR_DELETE, /* H5Adelete(_by_name/idx) */ H5VL_ATTR_EXISTS, /* H5Aexists(_by_name) */ H5VL_ATTR_ITER, /* H5Aiterate(_by_name) */ H5VL_ATTR_RENAME /* H5Arename(_by_name) */ } H5VL_attr_specific_t; /* Typedef for VOL connector attribute optional VOL operations */ typedef int H5VL_attr_optional_t; /* types for dataset GET callback */ typedef enum H5VL_dataset_get_t { H5VL_DATASET_GET_DAPL, /* access property list */ H5VL_DATASET_GET_DCPL, /* creation property list */ H5VL_DATASET_GET_SPACE, /* dataspace */ H5VL_DATASET_GET_SPACE_STATUS, /* space status */ H5VL_DATASET_GET_STORAGE_SIZE, /* storage size */ H5VL_DATASET_GET_TYPE /* datatype */ } H5VL_dataset_get_t; /* types for dataset SPECFIC callback */ typedef enum H5VL_dataset_specific_t { H5VL_DATASET_SET_EXTENT, /* H5Dset_extent */ H5VL_DATASET_FLUSH, /* H5Dflush */ H5VL_DATASET_REFRESH /* H5Drefresh */ } H5VL_dataset_specific_t; /* Typedef for VOL connector dataset optional VOL operations */ typedef int H5VL_dataset_optional_t; /* types for datatype GET callback */ typedef enum H5VL_datatype_get_t { H5VL_DATATYPE_GET_BINARY, /* get serialized form of transient type */ H5VL_DATATYPE_GET_TCPL /* datatype creation property list */ } H5VL_datatype_get_t; /* types for datatype SPECFIC callback */ typedef enum H5VL_datatype_specific_t { H5VL_DATATYPE_FLUSH, H5VL_DATATYPE_REFRESH } H5VL_datatype_specific_t; /* Typedef and values for native VOL connector named datatype optional VOL operations */ typedef int H5VL_datatype_optional_t; /* (No optional named datatype VOL operations currently) */ /* types for file GET callback */ typedef enum H5VL_file_get_t { H5VL_FILE_GET_CONT_INFO, /* file get container info */ H5VL_FILE_GET_FAPL, /* file access property list */ H5VL_FILE_GET_FCPL, /* file creation property list */ H5VL_FILE_GET_FILENO, /* file number */ H5VL_FILE_GET_INTENT, /* file intent */ H5VL_FILE_GET_NAME, /* file name */ H5VL_FILE_GET_OBJ_COUNT, /* object count in file */ H5VL_FILE_GET_OBJ_IDS /* object ids in file */ } H5VL_file_get_t; /* types for file SPECIFIC callback */ typedef enum H5VL_file_specific_t { H5VL_FILE_FLUSH, /* Flush file */ H5VL_FILE_REOPEN, /* Reopen the file */ H5VL_FILE_MOUNT, /* Mount a file */ H5VL_FILE_UNMOUNT, /* Unmount a file */ H5VL_FILE_IS_ACCESSIBLE, /* Check if a file is accessible */ H5VL_FILE_DELETE, /* Delete a file */ H5VL_FILE_IS_EQUAL /* Check if two files are the same */ } H5VL_file_specific_t; /* Typedef for VOL connector file optional VOL operations */ typedef int H5VL_file_optional_t; /* types for group GET callback */ typedef enum H5VL_group_get_t { H5VL_GROUP_GET_GCPL, /* group creation property list */ H5VL_GROUP_GET_INFO /* group info */ } H5VL_group_get_t; /* types for group SPECFIC callback */ typedef enum H5VL_group_specific_t { H5VL_GROUP_FLUSH, H5VL_GROUP_REFRESH } H5VL_group_specific_t; /* Typedef for VOL connector group optional VOL operations */ typedef int H5VL_group_optional_t; /* link create types for VOL */ typedef enum H5VL_link_create_type_t { H5VL_LINK_CREATE_HARD, H5VL_LINK_CREATE_SOFT, H5VL_LINK_CREATE_UD } H5VL_link_create_type_t; /* types for link GET callback */ typedef enum H5VL_link_get_t { H5VL_LINK_GET_INFO, /* link info */ H5VL_LINK_GET_NAME, /* link name */ H5VL_LINK_GET_VAL /* link value */ } H5VL_link_get_t; /* types for link SPECIFIC callback */ typedef enum H5VL_link_specific_t { H5VL_LINK_DELETE, /* H5Ldelete(_by_idx) */ H5VL_LINK_EXISTS, /* link existence */ H5VL_LINK_ITER /* H5Literate/visit(_by_name) */ } H5VL_link_specific_t; /* Typedef and values for native VOL connector link optional VOL operations */ typedef int H5VL_link_optional_t; /* (No optional link VOL operations currently) */ /* types for object GET callback */ typedef enum H5VL_object_get_t { H5VL_OBJECT_GET_FILE, /* object file */ H5VL_OBJECT_GET_NAME, /* object name */ H5VL_OBJECT_GET_TYPE, /* object type */ H5VL_OBJECT_GET_INFO /* H5Oget_info(_by_idx|name) */ } H5VL_object_get_t; /* types for object SPECIFIC callback */ typedef enum H5VL_object_specific_t { H5VL_OBJECT_CHANGE_REF_COUNT, /* H5Oincr/decr_refcount */ H5VL_OBJECT_EXISTS, /* H5Oexists_by_name */ H5VL_OBJECT_LOOKUP, /* Lookup object */ H5VL_OBJECT_VISIT, /* H5Ovisit(_by_name) */ H5VL_OBJECT_FLUSH, /* H5{D|G|O|T}flush */ H5VL_OBJECT_REFRESH /* H5{D|G|O|T}refresh */ } H5VL_object_specific_t; /* Typedef for VOL connector object optional VOL operations */ typedef int H5VL_object_optional_t; /* types for async request SPECIFIC callback */ typedef enum H5VL_request_specific_t { H5VL_REQUEST_WAITANY, /* Wait until any request completes */ H5VL_REQUEST_WAITSOME, /* Wait until at least one requesst completes */ H5VL_REQUEST_WAITALL /* Wait until all requests complete */ } H5VL_request_specific_t; /* Typedef and values for native VOL connector request optional VOL operations */ typedef int H5VL_request_optional_t; /* (No optional request VOL operations currently) */ /* types for 'blob' SPECIFIC callback */ typedef enum H5VL_blob_specific_t { H5VL_BLOB_DELETE, /* Delete a blob (by ID) */ H5VL_BLOB_GETSIZE, /* Get size of blob */ H5VL_BLOB_ISNULL, /* Check if a blob ID is "null" */ H5VL_BLOB_SETNULL /* Set a blob ID to the connector's "null" blob ID value */ } H5VL_blob_specific_t; /* Typedef and values for native VOL connector blob optional VOL operations */ typedef int H5VL_blob_optional_t; /* (No optional blob VOL operations currently) */ /* Types for different ways that objects are located in an HDF5 container */ typedef enum H5VL_loc_type_t { H5VL_OBJECT_BY_SELF, H5VL_OBJECT_BY_NAME, H5VL_OBJECT_BY_IDX, H5VL_OBJECT_BY_TOKEN } H5VL_loc_type_t; typedef struct H5VL_loc_by_name { const char *name; hid_t lapl_id; } H5VL_loc_by_name_t; typedef struct H5VL_loc_by_idx { const char *name; H5_index_t idx_type; H5_iter_order_t order; hsize_t n; hid_t lapl_id; } H5VL_loc_by_idx_t; typedef struct H5VL_loc_by_token { H5O_token_t *token; } H5VL_loc_by_token_t; /* Structure to hold parameters for object locations. * Either: BY_SELF, BY_NAME, BY_IDX, BY_TOKEN * * Note: Leave loc_by_token as the first union member so we * can perform the simplest initialization of the struct * without raising warnings. * * Note: BY_SELF requires no union members. */ typedef struct H5VL_loc_params_t { H5I_type_t obj_type; H5VL_loc_type_t type; union { H5VL_loc_by_token_t loc_by_token; H5VL_loc_by_name_t loc_by_name; H5VL_loc_by_idx_t loc_by_idx; } loc_data; } H5VL_loc_params_t; /* Info for H5VL_FILE_GET_CONT_INFO */ typedef struct H5VL_file_cont_info_t { unsigned version; /* version information (keep first) */ uint64_t feature_flags; /* Container feature flags */ /* (none currently defined) */ size_t token_size; /* Size of tokens */ size_t blob_id_size; /* Size of blob IDs */ } H5VL_file_cont_info_t; /* VOL connector info fields & callbacks */ typedef struct H5VL_info_class_t { size_t size; /* Size of the VOL info */ void * (*copy)(const void *info); /* Callback to create a copy of the VOL info */ herr_t (*cmp)(int *cmp_value, const void *info1, const void *info2); /* Callback to compare VOL info */ herr_t (*free)(void *info); /* Callback to release a VOL info */ herr_t (*to_str)(const void *info, char **str); /* Callback to serialize connector's info into a string */ herr_t (*from_str)(const char *str, void **info); /* Callback to deserialize a string into connector's info */ } H5VL_info_class_t; /* VOL object wrap / retrieval callbacks */ /* (These only need to be implemented by "pass through" VOL connectors) */ typedef struct H5VL_wrap_class_t { void * (*get_object)(const void *obj); /* Callback to retrieve underlying object */ herr_t (*get_wrap_ctx)(const void *obj, void **wrap_ctx); /* Callback to retrieve the object wrapping context for the connector */ void * (*wrap_object)(void *obj, H5I_type_t obj_type, void *wrap_ctx); /* Callback to wrap a library object */ void * (*unwrap_object)(void *obj); /* Callback to unwrap a library object */ herr_t (*free_wrap_ctx)(void *wrap_ctx); /* Callback to release the object wrapping context for the connector */ } H5VL_wrap_class_t; /* H5A routines */ typedef struct H5VL_attr_class_t { void *(*create)(void *obj, const H5VL_loc_params_t *loc_params, const char *attr_name, hid_t type_id, hid_t space_id, hid_t acpl_id, hid_t aapl_id, hid_t dxpl_id, void **req); void *(*open)(void *obj, const H5VL_loc_params_t *loc_params, const char *attr_name, hid_t aapl_id, hid_t dxpl_id, void **req); herr_t (*read)(void *attr, hid_t mem_type_id, void *buf, hid_t dxpl_id, void **req); herr_t (*write)(void *attr, hid_t mem_type_id, const void *buf, hid_t dxpl_id, void **req); herr_t (*get)(void *obj, H5VL_attr_get_t get_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*specific)(void *obj, const H5VL_loc_params_t *loc_params, H5VL_attr_specific_t specific_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*optional)(void *obj, H5VL_attr_optional_t opt_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*close) (void *attr, hid_t dxpl_id, void **req); } H5VL_attr_class_t; /* H5D routines */ typedef struct H5VL_dataset_class_t { void *(*create)(void *obj, const H5VL_loc_params_t *loc_params, const char *name, hid_t lcpl_id, hid_t type_id, hid_t space_id, hid_t dcpl_id, hid_t dapl_id, hid_t dxpl_id, void **req); void *(*open)(void *obj, const H5VL_loc_params_t *loc_params, const char *name, hid_t dapl_id, hid_t dxpl_id, void **req); herr_t (*read)(void *dset, hid_t mem_type_id, hid_t mem_space_id, hid_t file_space_id, hid_t dxpl_id, void * buf, void **req); herr_t (*write)(void *dset, hid_t mem_type_id, hid_t mem_space_id, hid_t file_space_id, hid_t dxpl_id, const void * buf, void **req); herr_t (*get)(void *obj, H5VL_dataset_get_t get_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*specific)(void *obj, H5VL_dataset_specific_t specific_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*optional)(void *obj, H5VL_dataset_optional_t opt_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*close) (void *dset, hid_t dxpl_id, void **req); } H5VL_dataset_class_t; /* H5T routines*/ typedef struct H5VL_datatype_class_t { void *(*commit)(void *obj, const H5VL_loc_params_t *loc_params, const char *name, hid_t type_id, hid_t lcpl_id, hid_t tcpl_id, hid_t tapl_id, hid_t dxpl_id, void **req); void *(*open)(void *obj, const H5VL_loc_params_t *loc_params, const char * name, hid_t tapl_id, hid_t dxpl_id, void **req); herr_t (*get) (void *obj, H5VL_datatype_get_t get_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*specific)(void *obj, H5VL_datatype_specific_t specific_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*optional)(void *obj, H5VL_datatype_optional_t opt_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*close) (void *dt, hid_t dxpl_id, void **req); } H5VL_datatype_class_t; /* H5F routines */ typedef struct H5VL_file_class_t { void *(*create)(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id, hid_t dxpl_id, void **req); void *(*open)(const char *name, unsigned flags, hid_t fapl_id, hid_t dxpl_id, void **req); herr_t (*get)(void *obj, H5VL_file_get_t get_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*specific)(void *obj, H5VL_file_specific_t specific_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*optional)(void *obj, H5VL_file_optional_t opt_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*close) (void *file, hid_t dxpl_id, void **req); } H5VL_file_class_t; /* H5G routines */ typedef struct H5VL_group_class_t { void *(*create)(void *obj, const H5VL_loc_params_t *loc_params, const char *name, hid_t lcpl_id, hid_t gcpl_id, hid_t gapl_id, hid_t dxpl_id, void **req); void *(*open)(void *obj, const H5VL_loc_params_t *loc_params, const char *name, hid_t gapl_id, hid_t dxpl_id, void **req); herr_t (*get)(void *obj, H5VL_group_get_t get_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*specific)(void *obj, H5VL_group_specific_t specific_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*optional)(void *obj, H5VL_group_optional_t opt_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*close) (void *grp, hid_t dxpl_id, void **req); } H5VL_group_class_t; /* H5L routines */ typedef struct H5VL_link_class_t { herr_t (*create)(H5VL_link_create_type_t create_type, void *obj, const H5VL_loc_params_t *loc_params, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id, void **req, va_list arguments); herr_t (*copy)(void *src_obj, const H5VL_loc_params_t *loc_params1, void *dst_obj, const H5VL_loc_params_t *loc_params2, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id, void **req); herr_t (*move)(void *src_obj, const H5VL_loc_params_t *loc_params1, void *dst_obj, const H5VL_loc_params_t *loc_params2, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id, void **req); herr_t (*get)(void *obj, const H5VL_loc_params_t *loc_params, H5VL_link_get_t get_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*specific)(void *obj, const H5VL_loc_params_t *loc_params, H5VL_link_specific_t specific_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*optional)(void *obj, H5VL_link_optional_t opt_type, hid_t dxpl_id, void **req, va_list arguments); } H5VL_link_class_t; /* H5O routines */ typedef struct H5VL_object_class_t { void *(*open)(void *obj, const H5VL_loc_params_t *loc_params, H5I_type_t *opened_type, hid_t dxpl_id, void **req); herr_t (*copy)(void *src_obj, const H5VL_loc_params_t *loc_params1, const char *src_name, void *dst_obj, const H5VL_loc_params_t *loc_params2, const char *dst_name, hid_t ocpypl_id, hid_t lcpl_id, hid_t dxpl_id, void **req); herr_t (*get)(void *obj, const H5VL_loc_params_t *loc_params, H5VL_object_get_t get_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*specific)(void *obj, const H5VL_loc_params_t *loc_params, H5VL_object_specific_t specific_type, hid_t dxpl_id, void **req, va_list arguments); herr_t (*optional)(void *obj, H5VL_object_optional_t opt_type, hid_t dxpl_id, void **req, va_list arguments); } H5VL_object_class_t; /* Asynchronous request 'notify' callback */ typedef herr_t (*H5VL_request_notify_t)(void *ctx, H5ES_status_t status); /* "Levels" for 'get connector class' introspection callback */ typedef enum H5VL_get_conn_lvl_t { H5VL_GET_CONN_LVL_CURR, /* Get "current" connector (for this object) */ H5VL_GET_CONN_LVL_TERM /* Get "terminal" connector (for this object) */ /* (Recursively called, for pass-through connectors) */ /* (Connectors that "split" must choose which connector to return) */ } H5VL_get_conn_lvl_t; /* Forward declaration of H5VL_class_t, defined later in this file */ struct H5VL_class_t; /* Container/connector introspection routines */ typedef struct H5VL_introspect_class_t { herr_t (*get_conn_cls)(void *obj, H5VL_get_conn_lvl_t lvl, const struct H5VL_class_t **conn_cls); herr_t (*opt_query)(void *obj, H5VL_subclass_t cls, int opt_type, hbool_t *supported); } H5VL_introspect_class_t; /* Async request operation routines */ typedef struct H5VL_request_class_t { herr_t (*wait)(void *req, uint64_t timeout, H5ES_status_t *status); herr_t (*notify)(void *req, H5VL_request_notify_t cb, void *ctx); herr_t (*cancel)(void *req); herr_t (*specific)(void *req, H5VL_request_specific_t specific_type, va_list arguments); herr_t (*optional)(void *req, H5VL_request_optional_t opt_type, va_list arguments); herr_t (*free)(void *req); } H5VL_request_class_t; /* 'blob' routines */ typedef struct H5VL_blob_class_t { herr_t (*put)(void *obj, const void *buf, size_t size, void *blob_id, void *ctx); herr_t (*get)(void *obj, const void *blob_id, void *buf, size_t size, void *ctx); herr_t (*specific)(void *obj, void *blob_id, H5VL_blob_specific_t specific_type, va_list arguments); herr_t (*optional)(void *obj, void *blob_id, H5VL_blob_optional_t opt_type, va_list arguments); } H5VL_blob_class_t; /* Object token routines */ typedef struct H5VL_token_class_t { herr_t (*cmp)(void *obj, const H5O_token_t *token1, const H5O_token_t *token2, int *cmp_value); herr_t (*to_str)(void *obj, H5I_type_t obj_type, const H5O_token_t *token, char **token_str); herr_t (*from_str)(void *obj, H5I_type_t obj_type, const char *token_str, H5O_token_t *token); } H5VL_token_class_t; /* Class information for each VOL connector */ typedef struct H5VL_class_t { /* Overall connector fields & callbacks */ unsigned int version; /* VOL connector class struct version # */ H5VL_class_value_t value; /* Value to identify connector */ const char *name; /* Connector name (MUST be unique!) */ unsigned cap_flags; /* Capability flags for connector */ herr_t (*initialize)(hid_t vipl_id); /* Connector initialization callback */ herr_t (*terminate)(void); /* Connector termination callback */ /* VOL framework */ H5VL_info_class_t info_cls; /* VOL info fields & callbacks */ H5VL_wrap_class_t wrap_cls; /* VOL object wrap / retrieval callbacks */ /* Data Model */ H5VL_attr_class_t attr_cls; /* Attribute (H5A*) class callbacks */ H5VL_dataset_class_t dataset_cls; /* Dataset (H5D*) class callbacks */ H5VL_datatype_class_t datatype_cls; /* Datatype (H5T*) class callbacks */ H5VL_file_class_t file_cls; /* File (H5F*) class callbacks */ H5VL_group_class_t group_cls; /* Group (H5G*) class callbacks */ H5VL_link_class_t link_cls; /* Link (H5L*) class callbacks */ H5VL_object_class_t object_cls; /* Object (H5O*) class callbacks */ /* Infrastructure / Services */ H5VL_introspect_class_t introspect_cls; /* Container/connector introspection class callbacks */ H5VL_request_class_t request_cls; /* Asynchronous request class callbacks */ H5VL_blob_class_t blob_cls; /* 'Blob' class callbacks */ H5VL_token_class_t token_cls; /* VOL connector object token class callbacks */ /* Catch-all */ herr_t (*optional)(void *obj, int op_type, hid_t dxpl_id, void **req, va_list arguments); /* Optional callback */ } H5VL_class_t; /********************/ /* Public Variables */ /********************/ /*********************/ /* Public Prototypes */ /*********************/ #ifdef __cplusplus extern "C" { #endif /* Helper routines for VOL connector authors */ H5_DLL hid_t H5VLregister_connector(const H5VL_class_t *cls, hid_t vipl_id); H5_DLL void *H5VLobject(hid_t obj_id); H5_DLL hid_t H5VLget_file_type(void *file_obj, hid_t connector_id, hid_t dtype_id); H5_DLL hid_t H5VLpeek_connector_id_by_name(const char *name); H5_DLL hid_t H5VLpeek_connector_id_by_value(H5VL_class_value_t value); #ifdef __cplusplus } #endif #endif /* _H5VLconnector_H */