/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* * Purpose: The Virtual Object Layer as described in documentation. * The pupose is to provide an abstraction on how to access the * underlying HDF5 container, whether in a local file with * a specific file format, or remotely on other machines, etc... */ /****************/ /* Module Setup */ /****************/ #include "H5VLmodule.h" /* This source code file is part of the H5VL module */ /***********/ /* Headers */ /***********/ #include "H5private.h" /* Generic Functions */ #include "H5CXprivate.h" /* API Contexts */ #include "H5Eprivate.h" /* Error handling */ #include "H5Iprivate.h" /* IDs */ #include "H5Pprivate.h" /* Property lists */ #include "H5Tprivate.h" /* Datatypes */ #include "H5VLpkg.h" /* Virtual Object Layer */ /* VOL connectors */ #include "H5VLnative.h" /* Native VOL connector */ /****************/ /* Local Macros */ /****************/ /******************/ /* Local Typedefs */ /******************/ /********************/ /* Local Prototypes */ /********************/ /*********************/ /* Package Variables */ /*********************/ /*****************************/ /* Library Private Variables */ /*****************************/ /*******************/ /* Local Variables */ /*******************/ /*------------------------------------------------------------------------- * Function: H5VLregister_connector * * Purpose: Registers a new VOL connector as a member of the virtual object * layer class. * * VIPL_ID is a VOL initialization property list which must be * created with H5Pcreate(H5P_VOL_INITIALIZE) (or H5P_DEFAULT). * * Return: Success: A VOL connector ID which is good until the * library is closed or the connector is * unregistered. * * Failure: H5I_INVALID_HID * *------------------------------------------------------------------------- */ hid_t H5VLregister_connector(const H5VL_class_t *cls, hid_t vipl_id) { hid_t ret_value = H5I_INVALID_HID; /* Return value */ FUNC_ENTER_API(H5I_INVALID_HID) H5TRACE2("i", "*xi", cls, vipl_id); /* Check VOL initialization property list */ if (H5P_DEFAULT == vipl_id) vipl_id = H5P_VOL_INITIALIZE_DEFAULT; else if (TRUE != H5P_isa_class(vipl_id, H5P_VOL_INITIALIZE)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a VOL initialize property list") /* Register connector */ if ((ret_value = H5VL__register_connector_by_class(cls, TRUE, vipl_id)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register VOL connector") done: FUNC_LEAVE_API(ret_value) } /* end H5VLregister_connector() */ /*------------------------------------------------------------------------- * Function: H5VLregister_connector_by_name * * Purpose: Registers a new VOL connector as a member of the virtual object * layer class. * * VIPL_ID is a VOL initialization property list which must be * created with H5Pcreate(H5P_VOL_INITIALIZE) (or H5P_DEFAULT). * * Return: Success: A VOL connector ID which is good until the * library is closed or the connector is * unregistered. * * Failure: H5I_INVALID_HID * *------------------------------------------------------------------------- */ hid_t H5VLregister_connector_by_name(const char *name, hid_t vipl_id) { hid_t ret_value = H5I_INVALID_HID; /* Return value */ FUNC_ENTER_API(H5I_INVALID_HID) H5TRACE2("i", "*si", name, vipl_id); /* Check arguments */ if (!name) HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, H5I_INVALID_HID, "null VOL connector name is disallowed") if (0 == HDstrlen(name)) HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, H5I_INVALID_HID, "zero-length VOL connector name is disallowed") /* Check VOL initialization property list */ if (H5P_DEFAULT == vipl_id) vipl_id = H5P_VOL_INITIALIZE_DEFAULT; else if (TRUE != H5P_isa_class(vipl_id, H5P_VOL_INITIALIZE)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a VOL initialize property list") /* Register connector */ if ((ret_value = H5VL__register_connector_by_name(name, TRUE, vipl_id)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register VOL connector") done: FUNC_LEAVE_API(ret_value) } /* end H5VLregister_connector_by_name() */ /*------------------------------------------------------------------------- * Function: H5VLregister_connector_by_value * * Purpose: Registers a new VOL connector as a member of the virtual object * layer class. * * VIPL_ID is a VOL initialization property list which must be * created with H5Pcreate(H5P_VOL_INITIALIZE) (or H5P_DEFAULT). * * Return: Success: A VOL connector ID which is good until the * library is closed or the connector is * unregistered. * * Failure: H5I_INVALID_HID * *------------------------------------------------------------------------- */ hid_t H5VLregister_connector_by_value(H5VL_class_value_t value, hid_t vipl_id) { hid_t ret_value = H5I_INVALID_HID; /* Return value */ FUNC_ENTER_API(H5I_INVALID_HID) H5TRACE2("i", "VCi", value, vipl_id); /* Check arguments */ if (value < 0) HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, H5I_INVALID_HID, "negative VOL connector value is disallowed") /* Check VOL initialization property list */ if (H5P_DEFAULT == vipl_id) vipl_id = H5P_VOL_INITIALIZE_DEFAULT; else if (TRUE != H5P_isa_class(vipl_id, H5P_VOL_INITIALIZE)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a VOL initialize property list") /* Register connector */ if ((ret_value = H5VL__register_connector_by_value(value, TRUE, vipl_id)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register VOL connector") done: FUNC_LEAVE_API(ret_value) } /* end H5VLregister_connector_by_value() */ /*------------------------------------------------------------------------- * Function: H5VLis_connector_registered_by_name * * Purpose: Tests whether a VOL class has been registered or not * according to a supplied connector name. * * Return: >0 if a VOL connector with that name has been registered * 0 if a VOL connector with that name has NOT been registered * <0 on errors * * Programmer: Dana Robinson * June 17, 2017 * *------------------------------------------------------------------------- */ htri_t H5VLis_connector_registered_by_name(const char *name) { htri_t ret_value = FALSE; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE1("t", "*s", name); /* Check if connector with this name is registered */ if ((ret_value = H5VL__is_connector_registered_by_name(name)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, FAIL, "can't check for VOL") done: FUNC_LEAVE_API(ret_value) } /* end H5VLis_connector_registered_by_name() */ /*------------------------------------------------------------------------- * Function: H5VLis_connector_registered_by_value * * Purpose: Tests whether a VOL class has been registered or not * according to a supplied connector value (ID). * * Return: >0 if a VOL connector with that value has been registered * 0 if a VOL connector with that value hasn't been registered * <0 on errors * *------------------------------------------------------------------------- */ htri_t H5VLis_connector_registered_by_value(H5VL_class_value_t connector_value) { htri_t ret_value = FALSE; FUNC_ENTER_API(FAIL) H5TRACE1("t", "VC", connector_value); /* Check if connector with this value is registered */ if ((ret_value = H5VL__is_connector_registered_by_value(connector_value)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, FAIL, "can't check for VOL") done: FUNC_LEAVE_API(ret_value) } /* end H5VLis_connector_registered_by_value() */ /*------------------------------------------------------------------------- * Function: H5VLget_connector_id * * Purpose: Retrieves the VOL connector ID for a given object ID. * * Return: A valid VOL connector ID. This ID will need to be closed * using H5VLclose(). * * H5I_INVALID_HID on error. * * Programmer: Dana Robinson * June 17, 2017 * *------------------------------------------------------------------------- */ hid_t H5VLget_connector_id(hid_t obj_id) { hid_t ret_value = H5I_INVALID_HID; /* Return value */ FUNC_ENTER_API(H5I_INVALID_HID) H5TRACE1("i", "i", obj_id); /* Get connector ID */ if ((ret_value = H5VL__get_connector_id(obj_id, TRUE)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, H5I_INVALID_HID, "can't get VOL id") done: FUNC_LEAVE_API(ret_value) } /* end H5VLget_connector_id() */ /*------------------------------------------------------------------------- * Function: H5VLget_connector_id_by_name * * Purpose: Retrieves the ID for a registered VOL connector. * * Return: A valid VOL connector ID if a connector by that name has * been registered. This ID will need to be closed using * H5VLclose(). * * H5I_INVALID_HID on error or if a VOL connector of that * name has not been registered. * * Programmer: Dana Robinson * June 17, 2017 * *------------------------------------------------------------------------- */ hid_t H5VLget_connector_id_by_name(const char *name) { hid_t ret_value = H5I_INVALID_HID; /* Return value */ FUNC_ENTER_API(H5I_INVALID_HID) H5TRACE1("i", "*s", name); /* Get connector ID with this name */ if ((ret_value = H5VL__get_connector_id_by_name(name, TRUE)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, H5I_INVALID_HID, "can't get VOL id") done: FUNC_LEAVE_API(ret_value) } /* end H5VLget_connector_id_by_name() */ /*------------------------------------------------------------------------- * Function: H5VLget_connector_id_by_value * * Purpose: Retrieves the ID for a registered VOL connector. * * Return: A valid VOL connector ID if a connector with that value has * been registered. This ID will need to be closed using * H5VLclose(). * * H5I_INVALID_HID on error or if a VOL connector with that * value has not been registered. * *------------------------------------------------------------------------- */ hid_t H5VLget_connector_id_by_value(H5VL_class_value_t connector_value) { hid_t ret_value = H5I_INVALID_HID; /* Return value */ FUNC_ENTER_API(H5I_INVALID_HID) H5TRACE1("i", "VC", connector_value); /* Get connector ID with this value */ if ((ret_value = H5VL__get_connector_id_by_value(connector_value, TRUE)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, H5I_INVALID_HID, "can't get VOL id") done: FUNC_LEAVE_API(ret_value) } /* end H5VLget_connector_id_by_value() */ /*------------------------------------------------------------------------- * Function: H5VLpeek_connector_id_by_name * * Purpose: Retrieves the ID for a registered VOL connector. * * Return: A valid VOL connector ID if a connector by that name has * been registered. This ID is *not* owned by the caller and * H5VLclose() should not be called. Intended for use by VOL * connectors to find their own ID. * * H5I_INVALID_HID on error or if a VOL connector of that * name has not been registered. * *------------------------------------------------------------------------- */ hid_t H5VLpeek_connector_id_by_name(const char *name) { hid_t ret_value = H5I_INVALID_HID; /* Return value */ FUNC_ENTER_API(H5I_INVALID_HID) H5TRACE1("i", "*s", name); /* Get connector ID with this name */ if ((ret_value = H5VL__peek_connector_id_by_name(name)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, H5I_INVALID_HID, "can't get VOL id") done: FUNC_LEAVE_API(ret_value) } /* end H5VLpeek_connector_id_by_name() */ /*------------------------------------------------------------------------- * Function: H5VLpeek_connector_id_by_value * * Purpose: Retrieves the ID for a registered VOL connector. * * Return: A valid VOL connector ID if a connector with that value * has been registered. This ID is *not* owned by the caller * and H5VLclose() should not be called. Intended for use by * VOL connectors to find their own ID. * * H5I_INVALID_HID on error or if a VOL connector with that * value has not been registered. * *------------------------------------------------------------------------- */ hid_t H5VLpeek_connector_id_by_value(H5VL_class_value_t value) { hid_t ret_value = H5I_INVALID_HID; /* Return value */ FUNC_ENTER_API(H5I_INVALID_HID) H5TRACE1("i", "VC", value); /* Get connector ID with this value */ if ((ret_value = H5VL__peek_connector_id_by_value(value)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, H5I_INVALID_HID, "can't get VOL id") done: FUNC_LEAVE_API(ret_value) } /* end H5VLpeek_connector_id_by_value() */ /*------------------------------------------------------------------------- * Function: H5VLget_connector_name * * Purpose: Returns the connector name for the VOL associated with the * object or file ID. * * This works like other calls where the caller must provide a * buffer of the appropriate size for the library to fill in. * i.e., passing in a NULL pointer for NAME will return the * required size of the buffer. * * Return: Success: The length of the connector name * * Failure: Negative * *------------------------------------------------------------------------- */ ssize_t H5VLget_connector_name(hid_t obj_id, char *name /*out*/, size_t size) { ssize_t ret_value = -1; FUNC_ENTER_API(FAIL) H5TRACE3("Zs", "ixz", obj_id, name, size); /* Call internal routine */ if ((ret_value = H5VL__get_connector_name(obj_id, name, size)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, FAIL, "Can't get connector name") done: FUNC_LEAVE_API(ret_value) } /* end H5VLget_connector_name() */ /*------------------------------------------------------------------------- * Function: H5VLclose * * Purpose: Closes a VOL connector ID. This in no way affects * file access property lists which have been defined to use * this VOL connector or files which are already opened under with * this connector. * * Return: Success: Non-negative * Failure: Negative * *------------------------------------------------------------------------- */ herr_t H5VLclose(hid_t vol_id) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE1("e", "i", vol_id); /* Check args */ if (NULL == H5I_object_verify(vol_id, H5I_VOL)) HGOTO_ERROR(H5E_VOL, H5E_BADTYPE, FAIL, "not a VOL connector") /* Decrement the ref count on the ID, possibly releasing the VOL connector */ if (H5I_dec_app_ref(vol_id) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to close VOL connector ID") done: FUNC_LEAVE_API(ret_value) } /* end H5VLclose() */ /*------------------------------------------------------------------------- * Function: H5VLunregister_connector * * Purpose: Removes a VOL connector ID from the library. This in no way affects * file access property lists which have been defined to use * this VOL connector or files which are already opened under with * this connector. * * The native VOL connector cannot be unregistered and attempts * to do so are considered an error. * * Return: Success: Non-negative * * Failure: Negative * *------------------------------------------------------------------------- */ herr_t H5VLunregister_connector(hid_t vol_id) { hid_t native_id = H5I_INVALID_HID; herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE1("e", "i", vol_id); /* Check arguments */ if (NULL == H5I_object_verify(vol_id, H5I_VOL)) HGOTO_ERROR(H5E_VOL, H5E_BADTYPE, FAIL, "not a VOL connector ID") /* For the time being, we disallow unregistering the native VOL connector */ if (H5I_INVALID_HID == (native_id = H5VL__get_connector_id_by_name(H5VL_NATIVE_NAME, FALSE))) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, FAIL, "unable to find the native VOL connector ID") if (vol_id == native_id) HGOTO_ERROR(H5E_VOL, H5E_BADVALUE, FAIL, "unregistering the native VOL connector is not allowed") /* The H5VL_class_t struct will be freed by this function */ if (H5I_dec_app_ref(vol_id) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to unregister VOL connector") done: if (native_id != H5I_INVALID_HID) if (H5I_dec_ref(native_id) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to decrement count on native_id") FUNC_LEAVE_API(ret_value) } /* end H5VLunregister_connector() */ /*--------------------------------------------------------------------------- * Function: H5VLcmp_connector_cls * * Purpose: Compares two connector classes (based on their value field) * * Note: This routine is _only_ for HDF5 VOL connector authors! It is * _not_ part of the public API for HDF5 application developers. * * Return: Success: Non-negative, *cmp set to a value like strcmp * * Failure: Negative, *cmp unset * *--------------------------------------------------------------------------- */ herr_t H5VLcmp_connector_cls(int *cmp, hid_t connector_id1, hid_t connector_id2) { H5VL_class_t *cls1, *cls2; /* connectors for IDs */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE3("e", "*Isii", cmp, connector_id1, connector_id2); /* Check args and get class pointers */ if (NULL == (cls1 = (H5VL_class_t *)H5I_object_verify(connector_id1, H5I_VOL))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a VOL connector ID") if (NULL == (cls2 = (H5VL_class_t *)H5I_object_verify(connector_id2, H5I_VOL))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a VOL connector ID") /* Compare the two VOL connector classes */ if (H5VL_cmp_connector_cls(cmp, cls1, cls2) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTCOMPARE, FAIL, "can't compare connector classes") done: FUNC_LEAVE_API(ret_value) } /* H5VLcmp_connector_cls() */ /*--------------------------------------------------------------------------- * Function: H5VLwrap_register * * Purpose: Wrap an internal object with a "wrap context" and register an * hid_t for the resulting object. * * Note: This routine is mainly targeted toward wrapping objects for * iteration routine callbacks (i.e. the callbacks from H5Aiterate*, * H5Literate* / H5Lvisit*, and H5Ovisit* ). * * type must be a VOL-managed object class (H5I_FILE, * H5I_GROUP, H5I_DATATYPE, H5I_DATASET, H5I_MAP, or H5I_ATTR). * * Return: Success: Non-negative hid_t for the object. * Failure: Negative (H5I_INVALID_HID) * *--------------------------------------------------------------------------- */ hid_t H5VLwrap_register(void *obj, H5I_type_t type) { hid_t ret_value; /* Return value */ /* Use FUNC_ENTER_API_NOINIT here, so the API context doesn't get reset */ FUNC_ENTER_API_NOINIT H5TRACE2("i", "*xIt", obj, type); /* Check args */ /* Use a switch here for (hopefully) better performance than a series of * equality checks. We could also group these types together in H5I_type_t, * make some assertions here to guarantee that, then just check the range. */ switch (type) { case H5I_FILE: case H5I_GROUP: case H5I_DATATYPE: case H5I_DATASET: case H5I_MAP: case H5I_ATTR: /* VOL-managed objects, call is valid */ break; case H5I_UNINIT: case H5I_BADID: case H5I_DATASPACE: case H5I_VFL: case H5I_VOL: case H5I_GENPROP_CLS: case H5I_GENPROP_LST: case H5I_ERROR_CLASS: case H5I_ERROR_MSG: case H5I_ERROR_STACK: case H5I_SPACE_SEL_ITER: case H5I_NTYPES: default: HGOTO_ERROR(H5E_VOL, H5E_BADRANGE, H5I_INVALID_HID, "invalid type number") } /* end switch */ if (NULL == obj) HGOTO_ERROR(H5E_VOL, H5E_BADVALUE, H5I_INVALID_HID, "obj is NULL") /* Wrap the object and register an ID for it */ if ((ret_value = H5VL_wrap_register(type, obj, TRUE)) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to wrap object") done: FUNC_LEAVE_API_NOINIT(ret_value) } /* H5VLwrap_register() */ /*--------------------------------------------------------------------------- * Function: H5VLobject * * Purpose: Retrieve the object pointer associated with an hid_t for a * VOL object. * * Note: This routine is mainly targeted toward unwrapping objects for * testing. * * Return: Success: Object pointer * Failure: NULL * *--------------------------------------------------------------------------- */ void * H5VLobject(hid_t id) { void *ret_value; /* Return value */ FUNC_ENTER_API(NULL) H5TRACE1("*x", "i", id); /* Retrieve the object pointer for the ID */ if (NULL == (ret_value = H5VL_object(id))) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, NULL, "unable to retrieve object") done: FUNC_LEAVE_API(ret_value) } /* H5VLobject() */ /*------------------------------------------------------------------------- * Function: H5VLget_file_type * * Purpose: Returns a copy of dtype_id with its location set to be in * the file, with updated size, etc. * * Return: Non-negative on success/Negative on failure * *------------------------------------------------------------------------- */ hid_t H5VLget_file_type(void *file_obj, hid_t connector_id, hid_t dtype_id) { H5T_t * dtype; /* unatomized type */ H5T_t * file_type = NULL; /* copied file type */ hid_t file_type_id = -1; /* copied file type id */ H5VL_object_t *file_vol_obj = NULL; /* VOL object for file */ hid_t ret_value = -1; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE3("i", "*xii", file_obj, connector_id, dtype_id); /* Check args */ if (!file_obj) HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "no file object supplied") if (NULL == (dtype = (H5T_t *)H5I_object_verify(dtype_id, H5I_DATATYPE))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type") /* Create VOL object for file if necessary (force_conv will be TRUE if and * only if file needs to be passed to H5T_set_loc) */ if (H5T_GET_FORCE_CONV(dtype) && (NULL == (file_vol_obj = H5VL_create_object_using_vol_id(H5I_FILE, file_obj, connector_id)))) HGOTO_ERROR(H5E_VOL, H5E_CANTCREATE, FAIL, "can't create VOL object") /* Copy the datatype */ if (NULL == (file_type = H5T_copy(dtype, H5T_COPY_TRANSIENT))) HGOTO_ERROR(H5E_VOL, H5E_CANTCOPY, FAIL, "unable to copy datatype") /* Register file type id */ if ((file_type_id = H5I_register(H5I_DATATYPE, file_type, FALSE)) < 0) { (void)H5T_close_real(file_type); HGOTO_ERROR(H5E_VOL, H5E_CANTREGISTER, FAIL, "unable to register file datatype") } /* end if */ /* Set the location of the datatype to be in the file */ if (H5T_set_loc(file_type, file_vol_obj, H5T_LOC_DISK) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTINIT, FAIL, "can't set datatype location") /* Release our reference to file_type */ if (file_vol_obj) { if (H5VL_free_object(file_vol_obj) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to free VOL object") file_vol_obj = NULL; } /* end if */ /* Set return value */ ret_value = file_type_id; done: /* Cleanup on error */ if (ret_value < 0) { if (file_vol_obj && H5VL_free_object(file_vol_obj) < 0) HDONE_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to free VOL object") if (file_type_id >= 0 && H5I_dec_ref(file_type_id) < 0) HDONE_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to close file datatype") } /* end if */ FUNC_LEAVE_API(ret_value) } /* end H5VLget_file_type() */ /*--------------------------------------------------------------------------- * Function: H5VLretrieve_lib_state * * Purpose: Retrieves a copy of the internal state of the HDF5 library, * so that it can be restored later. * * Note: This routine is _only_ for HDF5 VOL connector authors! It is * _not_ part of the public API for HDF5 application developers. * * Return: Success: Non-negative, *state set * Failure: Negative, *state unset * * Programmer: Quincey Koziol * Thursday, January 10, 2019 * *--------------------------------------------------------------------------- */ herr_t H5VLretrieve_lib_state(void **state) { herr_t ret_value = SUCCEED; /* Return value */ /* Must use this, to avoid modifying the API context stack in FUNC_ENTER */ FUNC_ENTER_API_NOINIT H5TRACE1("e", "**x", state); /* Check args */ if (NULL == state) HGOTO_ERROR(H5E_VOL, H5E_BADVALUE, FAIL, "invalid state pointer") /* Retrieve the library state */ if (H5VL_retrieve_lib_state(state) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, FAIL, "can't retrieve library state") done: FUNC_LEAVE_API_NOINIT(ret_value) } /* H5VLretrieve_lib_state() */ /*--------------------------------------------------------------------------- * Function: H5VLrestore_lib_state * * Purpose: Restores the internal state of the HDF5 library. * * Note: This routine is _only_ for HDF5 VOL connector authors! It is * _not_ part of the public API for HDF5 application developers. * * Return: Success: Non-negative * Failure: Negative * * Programmer: Quincey Koziol * Thursday, January 10, 2019 * *--------------------------------------------------------------------------- */ herr_t H5VLrestore_lib_state(const void *state) { herr_t ret_value = SUCCEED; /* Return value */ /* Must use this, to avoid modifying the API context stack in FUNC_ENTER */ FUNC_ENTER_API_NOINIT H5TRACE1("e", "*x", state); /* Check args */ if (NULL == state) HGOTO_ERROR(H5E_VOL, H5E_BADVALUE, FAIL, "invalid state pointer") /* Restore the library state */ if (H5VL_restore_lib_state(state) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTSET, FAIL, "can't restore library state") done: FUNC_LEAVE_API_NOINIT(ret_value) } /* H5VLrestore_lib_state() */ /*--------------------------------------------------------------------------- * Function: H5VLreset_lib_state * * Purpose: Resets the internal state of the HDF5 library, undoing the * affects of H5VLrestore_lib_state. * * Note: This routine is _only_ for HDF5 VOL connector authors! It is * _not_ part of the public API for HDF5 application developers. * * Note: This routine must be called as a "pair" with * H5VLrestore_lib_state. It can be called before / after / * independently of H5VLfree_lib_state. * * Return: Success: Non-negative * Failure: Negative * * Programmer: Quincey Koziol * Saturday, February 23, 2019 * *--------------------------------------------------------------------------- */ herr_t H5VLreset_lib_state(void) { herr_t ret_value = SUCCEED; /* Return value */ /* Must use this, to avoid modifying the API context stack in FUNC_ENTER */ FUNC_ENTER_API_NOINIT H5TRACE0("e", ""); /* Reset the library state */ if (H5VL_reset_lib_state() < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTRESET, FAIL, "can't reset library state") done: FUNC_LEAVE_API_NOINIT(ret_value) } /* H5VLreset_lib_state() */ /*--------------------------------------------------------------------------- * Function: H5VLfree_lib_state * * Purpose: Free a retrieved library state. * * Note: This routine is _only_ for HDF5 VOL connector authors! It is * _not_ part of the public API for HDF5 application developers. * * Note: This routine must be called as a "pair" with * H5VLretrieve_lib_state. * * Return: Success: Non-negative * Failure: Negative * * Programmer: Quincey Koziol * Thursday, January 10, 2019 * *--------------------------------------------------------------------------- */ herr_t H5VLfree_lib_state(void *state) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE1("e", "*x", state); /* Check args */ if (NULL == state) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid state pointer") /* Free the library state */ if (H5VL_free_lib_state(state) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTRELEASE, FAIL, "can't free library state") done: FUNC_LEAVE_API(ret_value) } /* H5VLfree_lib_state() */ /*--------------------------------------------------------------------------- * Function: H5VLquery_optional * * Purpose: Determine if a VOL connector supports a particular optional * callback operation. * * Return: Success: Non-negative * Failure: Negative * *--------------------------------------------------------------------------- */ herr_t H5VLquery_optional(hid_t obj_id, H5VL_subclass_t subcls, int opt_type, hbool_t *supported) { H5VL_object_t *vol_obj = NULL; herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE4("e", "iVSIs*b", obj_id, subcls, opt_type, supported); /* Check args */ if (NULL == supported) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid supported pointer") if (NULL == (vol_obj = (H5VL_object_t *)H5I_object(obj_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid object identifier") /* Query the connector */ if (H5VL_introspect_opt_query(vol_obj, subcls, opt_type, supported) < 0) HGOTO_ERROR(H5E_VOL, H5E_CANTGET, FAIL, "unable to query VOL connector support") done: FUNC_LEAVE_API(ret_value) } /* H5VLquery_optional() */