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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 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/****************/
/* Module Setup */
/****************/
#define H5O_PACKAGE /*suppress error about including H5Opkg */
#define H5SM_PACKAGE /*suppress error about including H5SMpkg */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Opkg.h" /* Object Headers */
#include "H5SMpkg.h" /* Shared object header messages */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/* Udata struct for calls to H5SM_compare_cb and H5SM_compare_iter_op*/
typedef struct H5SM_compare_udata_t {
const H5SM_mesg_key_t *key; /* Key; compare this against stored message */
H5O_msg_crt_idx_t idx; /* Index of the message in the OH, if applicable */
herr_t ret; /* Return value; set this to result of memcmp */
} H5SM_compare_udata_t;
/********************/
/* Local Prototypes */
/********************/
static herr_t H5SM_compare_cb(const void *obj, size_t obj_len, void *udata);
static herr_t H5SM_compare_iter_op(H5O_t *oh, H5O_mesg_t *mesg, unsigned sequence,
unsigned *oh_modified, void *udata);
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5SM_compare_cb
*
* Purpose: Callback for H5HF_op, used in H5SM_message_compare below.
* Determines whether the search key passed in in _UDATA is
* equal to OBJ or not.
*
* Passes back the result in _UDATA->RET
*
* Return: Negative on error, non-negative on success
*
* Programmer: James Laird
* Monday, January 8, 2007
*
*-------------------------------------------------------------------------
*/
static herr_t
H5SM_compare_cb(const void *obj, size_t obj_len, void *_udata)
{
H5SM_compare_udata_t *udata = (H5SM_compare_udata_t *)_udata;
FUNC_ENTER_NOAPI_NOINIT_NOERR
/* If the encoding sizes are different, it's not the same object */
if(udata->key->encoding_size > obj_len)
udata->ret = 1;
else if(udata->key->encoding_size < obj_len)
udata->ret = -1;
else
/* Sizes are the same. Return result of memcmp */
udata->ret = HDmemcmp(udata->key->encoding, obj, obj_len);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5SM_compare_cb() */
/*-------------------------------------------------------------------------
* Function: H5SM_compare_iter_op
*
* Purpose: OH iteration callback to compare a key against a message in
* an OH
*
* Return: 0 if this is not the message we're searching for
* 1 if this is the message we're searching for (with memcmp
* result returned in udata)
* negative on error
*
* Programmer: James Laird
* Wednesday, February 7, 2007
*
* Modifications:
* Vailin Choi; September 2011
* Change "oh_modified" from boolean to unsigned
* (See H5Oprivate.h for possible flags)
*-------------------------------------------------------------------------
*/
static herr_t
H5SM_compare_iter_op(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned sequence,
unsigned H5_ATTR_UNUSED *oh_modified, void *_udata/*in,out*/)
{
H5SM_compare_udata_t *udata = (H5SM_compare_udata_t *) _udata;
herr_t ret_value = H5_ITER_CONT;
FUNC_ENTER_NOAPI_NOINIT
/*
* Check arguments.
*/
HDassert(oh);
HDassert(mesg);
HDassert(udata && udata->key);
/* Check the creation index for this message */
if(sequence == udata->idx) {
size_t aligned_encoded_size = H5O_ALIGN_OH(oh, udata->key->encoding_size);
/* Sanity check the message's length */
HDassert(mesg->raw_size > 0);
if(aligned_encoded_size > mesg->raw_size)
udata->ret = 1;
else if(aligned_encoded_size < mesg->raw_size)
udata->ret = -1;
else {
/* Check if the message is dirty & flush it to the object header if so */
if(mesg->dirty)
if(H5O_msg_flush(udata->key->file, oh, mesg) < 0)
HGOTO_ERROR(H5E_SOHM, H5E_CANTENCODE, H5_ITER_ERROR, "unable to encode object header message")
HDassert(udata->key->encoding_size <= mesg->raw_size);
udata->ret = HDmemcmp(udata->key->encoding, mesg->raw, udata->key->encoding_size);
} /* end else */
/* Indicate that we found the message we were looking for */
ret_value = H5_ITER_STOP;
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5SM_compare_iter_op() */
/*-------------------------------------------------------------------------
* Function: H5SM_message_compare
*
* Purpose: Determine whether the search key rec1 represents a shared
* message that is equal to rec2 or not, and if not, whether
* rec1 is "greater than" or "less than" rec2.
*
* Return: 0 if rec1 == rec2
* Negative if rec1 < rec2
* Positive if rec1 > rec2
*
* Programmer: James Laird
* Monday, November 6, 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5SM_message_compare(const void *rec1, const void *rec2, int *result)
{
const H5SM_mesg_key_t *key = (const H5SM_mesg_key_t *) rec1;
const H5SM_sohm_t *mesg = (const H5SM_sohm_t *) rec2;
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT
/* If the key has an fheap ID, we're looking for a message that's
* already in the index; if the fheap ID matches, we've found the message
* and can stop immediately.
* Likewise, if the message has an OH location that is matched by the
* message in the index, we've found the message.
*/
if(mesg->location == H5SM_IN_HEAP && key->message.location == H5SM_IN_HEAP) {
if(key->message.u.heap_loc.fheap_id.val == mesg->u.heap_loc.fheap_id.val) {
*result = 0;
HGOTO_DONE(SUCCEED);
}
} /* end if */
else if(mesg->location == H5SM_IN_OH && key->message.location == H5SM_IN_OH) {
if(key->message.u.mesg_loc.oh_addr == mesg->u.mesg_loc.oh_addr &&
key->message.u.mesg_loc.index == mesg->u.mesg_loc.index &&
key->message.msg_type_id == mesg->msg_type_id) {
*result = 0;
HGOTO_DONE(SUCCEED);
}
} /* end if */
/* Compare hash values */
if(key->message.hash > mesg->hash)
*result = 1;
else if(key->message.hash < mesg->hash)
*result = -1;
/* If the hash values match, make sure the messages are really the same */
else {
/* Hash values match; compare the encoded message with the one in
* the index.
*/
H5SM_compare_udata_t udata;
HDassert(key->message.hash == mesg->hash);
HDassert(key->encoding_size > 0 && key->encoding);
/* Set up user data for callback */
udata.key = key;
/* Compare the encoded message with either the message in the heap or
* the message in an object header.
*/
if(mesg->location == H5SM_IN_HEAP) {
/* Call heap op routine with comparison callback */
if(H5HF_op(key->fheap, key->dxpl_id, &(mesg->u.heap_loc.fheap_id), H5SM_compare_cb, &udata) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")
} /* end if */
else {
H5O_loc_t oloc; /* Object owning the message */
H5O_mesg_operator_t op; /* Message operator */
/* Sanity checks */
HDassert(key->file);
HDassert(mesg->location == H5SM_IN_OH);
/* Reset the object location */
if(H5O_loc_reset(&oloc) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "unable to initialize target location")
/* Set up object location */
oloc.file = key->file;
oloc.addr = mesg->u.mesg_loc.oh_addr;
/* Finish setting up user data for iterator */
udata.idx = mesg->u.mesg_loc.index;
/* Locate the right message and compare with it */
op.op_type = H5O_MESG_OP_LIB;
op.u.lib_op = H5SM_compare_iter_op;
if(H5O_msg_iterate(&oloc, mesg->msg_type_id, &op, &udata, key->dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "error iterating over links")
} /* end else */
*result = udata.ret;
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5SM_message_compare */
/*-------------------------------------------------------------------------
* Function: H5SM_message_encode
*
* Purpose: Serialize a H5SM_sohm_t struct into a buffer RAW.
*
* Return: Non-negative on success
* Negative on failure
*
* Programmer: James Laird
* Monday, November 6, 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5SM_message_encode(uint8_t *raw, const void *_nrecord, void *_ctx)
{
H5SM_bt2_ctx_t *ctx = (H5SM_bt2_ctx_t *)_ctx; /* Callback context structure */
const H5SM_sohm_t *message = (const H5SM_sohm_t *)_nrecord;
FUNC_ENTER_NOAPI_NOINIT_NOERR
/* Sanity check */
HDassert(ctx);
*raw++ = (uint8_t)message->location;
UINT32ENCODE(raw, message->hash);
if(message->location == H5SM_IN_HEAP) {
UINT32ENCODE(raw, message->u.heap_loc.ref_count);
HDmemcpy(raw, message->u.heap_loc.fheap_id.id, (size_t)H5O_FHEAP_ID_LEN);
} /* end if */
else {
HDassert(message->location == H5SM_IN_OH);
*raw++ = 0; /* reserved (possible flags byte) */
*raw++ = (uint8_t)message->msg_type_id;
UINT16ENCODE(raw, message->u.mesg_loc.index);
H5F_addr_encode_len((size_t)ctx->sizeof_addr, &raw, message->u.mesg_loc.oh_addr);
} /* end else */
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5SM_message_encode */
/*-------------------------------------------------------------------------
* Function: H5SM_message_decode
*
* Purpose: Read an encoded SOHM message from RAW into an H5SM_sohm_t struct.
*
* Return: Non-negative on success
* Negative on failure
*
* Programmer: James Laird
* Monday, November 6, 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5SM_message_decode(const uint8_t *raw, void *_nrecord, void *_ctx)
{
H5SM_bt2_ctx_t *ctx = (H5SM_bt2_ctx_t *)_ctx; /* Callback context structure */
H5SM_sohm_t *message = (H5SM_sohm_t *)_nrecord;
FUNC_ENTER_NOAPI_NOINIT_NOERR
message->location = (H5SM_storage_loc_t)*raw++;
UINT32DECODE(raw, message->hash);
if(message->location == H5SM_IN_HEAP) {
UINT32DECODE(raw, message->u.heap_loc.ref_count);
HDmemcpy(message->u.heap_loc.fheap_id.id, raw, (size_t)H5O_FHEAP_ID_LEN);
} /* end if */
else {
HDassert(message->location == H5SM_IN_OH);
raw++; /* reserved */
message->msg_type_id = *raw++;
UINT16DECODE(raw, message->u.mesg_loc.index);
H5F_addr_decode_len((size_t)ctx->sizeof_addr, &raw, &message->u.mesg_loc.oh_addr);
} /* end else */
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5SM_message_decode */
|