/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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() */ 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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 files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Programmer:  Robb Matzke <matzke@llnl.gov>
 *              Thursday, July 29, 1999
 *
 * Purpose:	The POSIX unbuffered file driver using only the HDF5 public
 *		API and with a few optimizations: the lseek() call is made
 *		only when the current file position is unknown or needs to be
 *		changed based on previous I/O through this driver (don't mix
 *		I/O from this driver with I/O from other parts of the
 *		application to the same file).
 */

/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC	H5FD_sec2_init_interface


#include "H5private.h"		/* Generic Functions			*/
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5Fprivate.h"		/* File access				*/
#include "H5FDprivate.h"	/* File drivers				*/
#include "H5FDsec2.h"		/* Sec2 file driver			*/
#include "H5FLprivate.h"	/* Free Lists                           */
#include "H5Iprivate.h"		/* IDs			  		*/
#include "H5MMprivate.h"	/* Memory management			*/
#include "H5Pprivate.h"		/* Property lists			*/

/* The driver identification number, initialized at runtime */
static hid_t H5FD_SEC2_g = 0;

/* Since Windows doesn't follow the rest of the world when it comes
 * to POSIX I/O types, some typedefs and constants are needed to avoid
 * making the code messy with #ifdefs.
 */
#ifdef H5_HAVE_WIN32_API
typedef unsigned int    h5_sec2_io_t;
typedef int             h5_sec2_io_ret_t;
static int H5_SEC2_MAX_IO_BYTES_g = INT_MAX;
#else
/* Unix, everyone else */
typedef size_t          h5_sec2_io_t;
typedef ssize_t         h5_sec2_io_ret_t;
static size_t H5_SEC2_MAX_IO_BYTES_g = SSIZET_MAX;
#endif /* H5_HAVE_WIN32_API */
 
/* The description of a file belonging to this driver. The `eoa' and `eof'
 * determine the amount of hdf5 address space in use and the high-water mark
 * of the file (the current size of the underlying filesystem file). The
 * `pos' value is used to eliminate file position updates when they would be a
 * no-op. Unfortunately we've found systems that use separate file position
 * indicators for reading and writing so the lseek can only be eliminated if
 * the current operation is the same as the previous operation.  When opening
 * a file the `eof' will be set to the current file size, `eoa' will be set
 * to zero, `pos' will be set to H5F_ADDR_UNDEF (as it is when an error
 * occurs), and `op' will be set to H5F_OP_UNKNOWN.
 */
typedef struct H5FD_sec2_t {
    H5FD_t          pub;    /* public stuff, must be first      */
    int             fd;     /* the filesystem file descriptor   */
    haddr_t         eoa;    /* end of allocated region          */
    haddr_t         eof;    /* end of file; current file size   */
    haddr_t         pos;    /* current file I/O position        */
    H5FD_file_op_t  op;     /* last operation                   */
    char            filename[H5FD_MAX_FILENAME_LEN];    /* Copy of file name from open operation */
#ifndef H5_HAVE_WIN32_API
    /* On most systems the combination of device and i-node number uniquely
     * identify a file.  Note that Cygwin, MinGW and other Windows POSIX
     * environments have the stat function (which fakes inodes)
     * and will use the 'device + inodes' scheme as opposed to the
     * Windows code further below.
     */
    dev_t           device;     /* file device number   */
#ifdef H5_VMS
    ino_t           inode[3];   /* file i-node number   */
#else
    ino_t           inode;      /* file i-node number   */
#endif /* H5_VMS */
#else
    /* Files in windows are uniquely identified by the volume serial
     * number and the file index (both low and high parts).
     *
     * There are caveats where these numbers can change, especially
     * on FAT file systems.  On NTFS, however, a file should keep
     * those numbers the same until renamed or deleted (though you
     * can use ReplaceFile() on NTFS to keep the numbers the same
     * while renaming).
     *
     * See the MSDN "BY_HANDLE_FILE_INFORMATION Structure" entry for
     * more information.
     *
     * http://msdn.microsoft.com/en-us/library/aa363788(v=VS.85).aspx
     */
    DWORD           nFileIndexLow;
    DWORD           nFileIndexHigh;
    DWORD           dwVolumeSerialNumber;
    
    HANDLE          hFile;      /* Native windows file handle */
#endif  /* H5_HAVE_WIN32_API */

    /* Information from properties set by 'h5repart' tool
     *
     * Whether to eliminate the family driver info and convert this file to
     * a single file.
     */
    hbool_t         fam_to_sec2;
} H5FD_sec2_t;

/*
 * These macros check for overflow of various quantities.  These macros
 * assume that HDoff_t is signed and haddr_t and size_t are unsigned.
 *
 * ADDR_OVERFLOW:	Checks whether a file address of type `haddr_t'
 *			is too large to be represented by the second argument
 *			of the file seek function.
 *
 * SIZE_OVERFLOW:	Checks whether a buffer size of type `hsize_t' is too
 *			large to be represented by the `size_t' type.
 *
 * REGION_OVERFLOW:	Checks whether an address and size pair describe data
 *			which can be addressed entirely by the second
 *			argument of the file seek function.
 */
#define MAXADDR (((haddr_t)1<<(8*sizeof(HDoff_t)-1))-1)
#define ADDR_OVERFLOW(A)	(HADDR_UNDEF==(A) ||			      \
				 ((A) & ~(haddr_t)MAXADDR))
#define SIZE_OVERFLOW(Z)	((Z) & ~(hsize_t)MAXADDR)
#define REGION_OVERFLOW(A,Z)	(ADDR_OVERFLOW(A) || SIZE_OVERFLOW(Z) ||      \
                                 HADDR_UNDEF==(A)+(Z) ||		      \
				 (HDoff_t)((A)+(Z))<(HDoff_t)(A))

/* Prototypes */
static herr_t H5FD_sec2_term(void);
static H5FD_t *H5FD_sec2_open(const char *name, unsigned flags, hid_t fapl_id,
			      haddr_t maxaddr);
static herr_t H5FD_sec2_close(H5FD_t *_file);
static int H5FD_sec2_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
static herr_t H5FD_sec2_query(const H5FD_t *_f1, unsigned long *flags);
static haddr_t H5FD_sec2_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
static herr_t H5FD_sec2_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
static haddr_t H5FD_sec2_get_eof(const H5FD_t *_file);
static herr_t  H5FD_sec2_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
static herr_t H5FD_sec2_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
			     size_t size, void *buf);
static herr_t H5FD_sec2_write(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
			      size_t size, const void *buf);
static herr_t H5FD_sec2_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing);

static const H5FD_class_t H5FD_sec2_g = {
    "sec2",					/*name			*/
    MAXADDR,					/*maxaddr		*/
    H5F_CLOSE_WEAK,				/* fc_degree		*/
    H5FD_sec2_term,                             /*terminate             */
    NULL,					/*sb_size		*/
    NULL,					/*sb_encode		*/
    NULL,					/*sb_decode		*/
    0, 						/*fapl_size		*/
    NULL,					/*fapl_get		*/
    NULL,					/*fapl_copy		*/
    NULL, 					/*fapl_free		*/
    0,						/*dxpl_size		*/
    NULL,					/*dxpl_copy		*/
    NULL,					/*dxpl_free		*/
    H5FD_sec2_open,				/*open			*/
    H5FD_sec2_close,				/*close			*/
    H5FD_sec2_cmp,				/*cmp			*/
    H5FD_sec2_query,				/*query			*/
    NULL,					/*get_type_map		*/
    NULL,					/*alloc			*/
    NULL,					/*free			*/
    H5FD_sec2_get_eoa,				/*get_eoa		*/
    H5FD_sec2_set_eoa, 				/*set_eoa		*/
    H5FD_sec2_get_eof,				/*get_eof		*/
    H5FD_sec2_get_handle,                       /*get_handle            */
    H5FD_sec2_read,				/*read			*/
    H5FD_sec2_write,				/*write			*/
    NULL,					/*flush			*/
    H5FD_sec2_truncate,				/*truncate		*/
    NULL,                                       /*lock                  */
    NULL,                                       /*unlock                */
    H5FD_FLMAP_DICHOTOMY                        /*fl_map                */
};

/* Declare a free list to manage the H5FD_sec2_t struct */
H5FL_DEFINE_STATIC(H5FD_sec2_t);


/*--------------------------------------------------------------------------
NAME
   H5FD_sec2_init_interface -- Initialize interface-specific information
USAGE
    herr_t H5FD_sec2_init_interface()

RETURNS
    Non-negative on success/Negative on failure
DESCRIPTION
    Initializes any interface-specific data or routines.  (Just calls
    H5FD_sec2_init currently).

--------------------------------------------------------------------------*/
static herr_t
H5FD_sec2_init_interface(void)
{
    FUNC_ENTER_NOAPI_NOINIT_NOERR

    FUNC_LEAVE_NOAPI(H5FD_sec2_init())
} /* H5FD_sec2_init_interface() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_init
 *
 * Purpose:	Initialize this driver by registering the driver with the
 *		library.
 *
 * Return:	Success:	The driver ID for the sec2 driver.
 *		Failure:	Negative.
 *
 * Programmer:	Robb Matzke
 *              Thursday, July 29, 1999
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5FD_sec2_init(void)
{
    hid_t ret_value;            /* Return value */

    FUNC_ENTER_NOAPI(FAIL)

    if(H5I_VFL != H5I_get_type(H5FD_SEC2_g))
        H5FD_SEC2_g = H5FD_register(&H5FD_sec2_g, sizeof(H5FD_class_t), FALSE);

    /* Set return value */
    ret_value = H5FD_SEC2_g;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_sec2_init() */


/*---------------------------------------------------------------------------
 * Function:	H5FD_sec2_term
 *
 * Purpose:	Shut down the VFD
 *
 * Returns:     Non-negative on success or negative on failure
 *
 * Programmer:  Quincey Koziol
 *              Friday, Jan 30, 2004
 *
 *---------------------------------------------------------------------------
 */
static herr_t
H5FD_sec2_term(void)
{
    FUNC_ENTER_NOAPI_NOINIT_NOERR

    /* Reset VFL ID */
    H5FD_SEC2_g = 0;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5FD_sec2_term() */


/*-------------------------------------------------------------------------
 * Function:	H5Pset_fapl_sec2
 *
 * Purpose:	Modify the file access property list to use the H5FD_SEC2
 *		driver defined in this source file.  There are no driver
 *		specific properties.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		Thursday, February 19, 1998
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Pset_fapl_sec2(hid_t fapl_id)
{
    H5P_genplist_t *plist;      /* Property list pointer */
    herr_t ret_value;

    FUNC_ENTER_API(FAIL)
    H5TRACE1("e", "i", fapl_id);

    if(NULL == (plist = H5P_object_verify(fapl_id, H5P_FILE_ACCESS)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")

    ret_value = H5P_set_driver(plist, H5FD_SEC2, NULL);

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Pset_fapl_sec2() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_open
 *
 * Purpose:	Create and/or opens a file as an HDF5 file.
 *
 * Return:	Success:	A pointer to a new file data structure. The
 *				public fields will be initialized by the
 *				caller, which is always H5FD_open().
 *		Failure:	NULL
 *
 * Programmer:	Robb Matzke
 *              Thursday, July 29, 1999
 *
 *-------------------------------------------------------------------------
 */
static H5FD_t *
H5FD_sec2_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr)
{
    H5FD_sec2_t     *file       = NULL;     /* sec2 VFD info            */
    int             fd          = -1;       /* File descriptor          */
    int             o_flags;                /* Flags for open() call    */
#ifdef H5_HAVE_WIN32_API
    struct _BY_HANDLE_FILE_INFORMATION fileinfo;
#endif
    h5_stat_t       sb;
    H5FD_t          *ret_value;             /* Return value             */

    FUNC_ENTER_NOAPI_NOINIT

    /* Sanity check on file offsets */
    HDcompile_assert(sizeof(HDoff_t) >= sizeof(size_t));

    /* Check arguments */
    if(!name || !*name)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid file name")
    if(0 == maxaddr || HADDR_UNDEF == maxaddr)
        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr")
    if(ADDR_OVERFLOW(maxaddr))
        HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, NULL, "bogus maxaddr")

    /* Build the open flags */
    o_flags = (H5F_ACC_RDWR & flags) ? O_RDWR : O_RDONLY;
    if(H5F_ACC_TRUNC & flags)
        o_flags |= O_TRUNC;
    if(H5F_ACC_CREAT & flags)
        o_flags |= O_CREAT;
    if(H5F_ACC_EXCL & flags)
        o_flags |= O_EXCL;

    /* Open the file */
    if((fd = HDopen(name, o_flags, 0666)) < 0) {
        int myerrno = errno;
        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file: name = '%s', errno = %d, error message = '%s', flags = %x, o_flags = %x", name, myerrno, HDstrerror(myerrno), flags, (unsigned)o_flags);
    } /* end if */

    if(HDfstat(fd, &sb) < 0)
        HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, NULL, "unable to fstat file")

    /* Create the new file struct */
    if(NULL == (file = H5FL_CALLOC(H5FD_sec2_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "unable to allocate file struct")

    file->fd = fd;
    H5_ASSIGN_OVERFLOW(file->eof, sb.st_size, h5_stat_size_t, haddr_t);
    file->pos = HADDR_UNDEF;
    file->op = OP_UNKNOWN;
#ifdef H5_HAVE_WIN32_API
    file->hFile = (HANDLE)_get_osfhandle(fd);
    if(INVALID_HANDLE_VALUE == file->hFile)
        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to get Windows file handle")

    if(!GetFileInformationByHandle((HANDLE)file->hFile, &fileinfo))
        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to get Windows file information")

    file->nFileIndexHigh = fileinfo.nFileIndexHigh;
    file->nFileIndexLow = fileinfo.nFileIndexLow;
    file->dwVolumeSerialNumber = fileinfo.dwVolumeSerialNumber;
#else /* H5_HAVE_WIN32_API */
    file->device = sb.st_dev;
#ifdef H5_VMS
    file->inode[0] = sb.st_ino[0];
    file->inode[1] = sb.st_ino[1];
    file->inode[2] = sb.st_ino[2];
#else /* H5_VMS */
    file->inode = sb.st_ino;
#endif /* H5_VMS */
#endif /* H5_HAVE_WIN32_API */

    /* Retain a copy of the name used to open the file, for possible error reporting */
    HDstrncpy(file->filename, name, sizeof(file->filename));
    file->filename[sizeof(file->filename) - 1] = '\0';

    /* Check for non-default FAPL */
    if(H5P_FILE_ACCESS_DEFAULT != fapl_id) {
        H5P_genplist_t      *plist;      /* Property list pointer */

        /* Get the FAPL */
        if(NULL == (plist = (H5P_genplist_t *)H5I_object(fapl_id)))
            HGOTO_ERROR(H5E_VFL, H5E_BADTYPE, NULL, "not a file access property list")

        /* This step is for h5repart tool only. If user wants to change file driver from
         * family to sec2 while using h5repart, this private property should be set so that
         * in the later step, the library can ignore the family driver information saved
         * in the superblock.
         */
        if(H5P_exist_plist(plist, H5F_ACS_FAMILY_TO_SEC2_NAME) > 0)
            if(H5P_get(plist, H5F_ACS_FAMILY_TO_SEC2_NAME, &file->fam_to_sec2) < 0)
                HGOTO_ERROR(H5E_VFL, H5E_CANTGET, NULL, "can't get property of changing family to sec2")
    } /* end if */

    /* Set return value */
    ret_value = (H5FD_t*)file;

done:
    if(NULL == ret_value) {
        if(fd >= 0)
            HDclose(fd);
        if(file)
            file = H5FL_FREE(H5FD_sec2_t, file);
    } /* end if */

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_sec2_open() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_close
 *
 * Purpose:	Closes an HDF5 file.
 *
 * Return:	Success:	0
 *		Failure:	-1, file not closed.
 *
 * Programmer:	Robb Matzke
 *              Thursday, July 29, 1999
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_sec2_close(H5FD_t *_file)
{
    H5FD_sec2_t	*file = (H5FD_sec2_t *)_file;
    herr_t ret_value = SUCCEED;                 /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Sanity check */
    HDassert(file);

    /* Close the underlying file */
    if(HDclose(file->fd) < 0)
        HSYS_GOTO_ERROR(H5E_IO, H5E_CANTCLOSEFILE, FAIL, "unable to close file")

    /* Release the file info */
    file = H5FL_FREE(H5FD_sec2_t, file);

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_sec2_close() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_cmp
 *
 * Purpose:	Compares two files belonging to this driver using an
 *		arbitrary (but consistent) ordering.
 *
 * Return:	Success:	A value like strcmp()
 *		Failure:	never fails (arguments were checked by the
 *				caller).
 *
 * Programmer:	Robb Matzke
 *              Thursday, July 29, 1999
 *
 *-------------------------------------------------------------------------
 */
static int
H5FD_sec2_cmp(const H5FD_t *_f1, const H5FD_t *_f2)
{
    const H5FD_sec2_t	*f1 = (const H5FD_sec2_t *)_f1;
    const H5FD_sec2_t	*f2 = (const H5FD_sec2_t *)_f2;
    int ret_value = 0;

    FUNC_ENTER_NOAPI_NOINIT_NOERR

#ifdef H5_HAVE_WIN32_API
    if(f1->dwVolumeSerialNumber < f2->dwVolumeSerialNumber) HGOTO_DONE(-1)
    if(f1->dwVolumeSerialNumber > f2->dwVolumeSerialNumber) HGOTO_DONE(1)

    if(f1->nFileIndexHigh < f2->nFileIndexHigh) HGOTO_DONE(-1)
    if(f1->nFileIndexHigh > f2->nFileIndexHigh) HGOTO_DONE(1)

    if(f1->nFileIndexLow < f2->nFileIndexLow) HGOTO_DONE(-1)
    if(f1->nFileIndexLow > f2->nFileIndexLow) HGOTO_DONE(1)
#else /* H5_HAVE_WIN32_API */
#ifdef H5_DEV_T_IS_SCALAR
    if(f1->device < f2->device) HGOTO_DONE(-1)
    if(f1->device > f2->device) HGOTO_DONE(1)
#else /* H5_DEV_T_IS_SCALAR */
    /* If dev_t isn't a scalar value on this system, just use memcmp to
     * determine if the values are the same or not.  The actual return value
     * shouldn't really matter...
     */
    if(HDmemcmp(&(f1->device),&(f2->device),sizeof(dev_t)) < 0) HGOTO_DONE(-1)
    if(HDmemcmp(&(f1->device),&(f2->device),sizeof(dev_t)) > 0) HGOTO_DONE(1)
#endif /* H5_DEV_T_IS_SCALAR */
#ifdef H5_VMS
    if(HDmemcmp(&(f1->inode), &(f2->inode), 3 * sizeof(ino_t)) < 0) HGOTO_DONE(-1)
    if(HDmemcmp(&(f1->inode), &(f2->inode), 3 * sizeof(ino_t)) > 0) HGOTO_DONE(1)
#else /* H5_VMS */
    if(f1->inode < f2->inode) HGOTO_DONE(-1)
    if(f1->inode > f2->inode) HGOTO_DONE(1)
#endif /* H5_VMS */
#endif /* H5_HAVE_WIN32_API */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_sec2_cmp() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_query
 *
 * Purpose:	Set the flags that this VFL driver is capable of supporting.
 *              (listed in H5FDpublic.h)
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 * Programmer:	Quincey Koziol
 *              Friday, August 25, 2000
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5FD_sec2_query(const H5FD_t *_file, unsigned long *flags /* out */)
{
    const H5FD_sec2_t	*file = (const H5FD_sec2_t *)_file;    /* sec2 VFD info */

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    /* Set the VFL feature flags that this driver supports */
    if(flags) {
        *flags = 0;
        *flags |= H5FD_FEAT_AGGREGATE_METADATA;     /* OK to aggregate metadata allocations                             */
        *flags |= H5FD_FEAT_ACCUMULATE_METADATA;    /* OK to accumulate metadata for faster writes                      */
        *flags |= H5FD_FEAT_DATA_SIEVE;             /* OK to perform data sieving for faster raw data reads & writes    */
        *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA;    /* OK to aggregate "small" raw data allocations                     */
        *flags |= H5FD_FEAT_POSIX_COMPAT_HANDLE;    /* VFD handle is POSIX I/O call compatible                          */

        /* Check for flags that are set by h5repart */
        if(file && file->fam_to_sec2)
            *flags |= H5FD_FEAT_IGNORE_DRVRINFO; /* Ignore the driver info when file is opened (which eliminates it) */
    } /* end if */

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5FD_sec2_query() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_get_eoa
 *
 * Purpose:	Gets the end-of-address marker for the file. The EOA marker
 *		is the first address past the last byte allocated in the
 *		format address space.
 *
 * Return:	Success:	The end-of-address marker.
 *		Failure:	HADDR_UNDEF
 *
 * Programmer:	Robb Matzke
 *              Monday, August  2, 1999
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static haddr_t
H5FD_sec2_get_eoa(const H5FD_t *_file, H5FD_mem_t UNUSED type)
{
    const H5FD_sec2_t	*file = (const H5FD_sec2_t *)_file;

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    FUNC_LEAVE_NOAPI(file->eoa)
} /* end H5FD_sec2_get_eoa() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_set_eoa
 *
 * Purpose:	Set the end-of-address marker for the file. This function is
 *		called shortly after an existing HDF5 file is opened in order
 *		to tell the driver where the end of the HDF5 data is located.
 *
 * Return:	Success:	0
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Thursday, July 29, 1999
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static herr_t
H5FD_sec2_set_eoa(H5FD_t *_file, H5FD_mem_t UNUSED type, haddr_t addr)
{
    H5FD_sec2_t	*file = (H5FD_sec2_t *)_file;

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    file->eoa = addr;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5FD_sec2_set_eoa() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_get_eof
 *
 * Purpose:	Returns the end-of-file marker, which is the greater of
 *		either the filesystem end-of-file or the HDF5 end-of-address
 *		markers.
 *
 * Return:	Success:	End of file address, the first address past
 *				the end of the "file", either the filesystem file
 *				or the HDF5 file.
 *		Failure:	HADDR_UNDEF
 *
 * Programmer:	Robb Matzke
 *              Thursday, July 29, 1999
 *
 *-------------------------------------------------------------------------
 */
static haddr_t
H5FD_sec2_get_eof(const H5FD_t *_file)
{
    const H5FD_sec2_t	*file = (const H5FD_sec2_t *)_file;

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    FUNC_LEAVE_NOAPI(MAX(file->eof, file->eoa))
} /* end H5FD_sec2_get_eof() */


/*-------------------------------------------------------------------------
 * Function:       H5FD_sec2_get_handle
 *
 * Purpose:        Returns the file handle of sec2 file driver.
 *
 * Returns:        Non-negative if succeed or negative if fails.
 *
 * Programmer:     Raymond Lu
 *                 Sept. 16, 2002
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static herr_t
H5FD_sec2_get_handle(H5FD_t *_file, hid_t UNUSED fapl, void **file_handle)
{
    H5FD_sec2_t         *file = (H5FD_sec2_t *)_file;
    herr_t              ret_value = SUCCEED;

    FUNC_ENTER_NOAPI_NOINIT

    if(!file_handle)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "file handle not valid")

    *file_handle = &(file->fd);

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_sec2_get_handle() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_read
 *
 * Purpose:	Reads SIZE bytes of data from FILE beginning at address ADDR
 *		into buffer BUF according to data transfer properties in
 *		DXPL_ID.
 *
 * Return:	Success:	Zero. Result is stored in caller-supplied
 *				buffer BUF.
 *		Failure:	-1, Contents of buffer BUF are undefined.
 *
 * Programmer:	Robb Matzke
 *              Thursday, July 29, 1999
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static herr_t
H5FD_sec2_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id,
    haddr_t addr, size_t size, void *buf /*out*/)
{
    H5FD_sec2_t     *file       = (H5FD_sec2_t *)_file;
    herr_t          ret_value   = SUCCEED;                  /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    HDassert(file && file->pub.cls);
    HDassert(buf);

    /* Check for overflow conditions */
    if(!H5F_addr_defined(addr))
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "addr undefined, addr = %llu", (unsigned long long)addr)
    if(REGION_OVERFLOW(addr, size))
        HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu", (unsigned long long)addr)
    if((addr + size) > file->eoa)
        HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu, size=%lu, eoa=%llu", 
                    (unsigned long long)addr, size, (unsigned long long)file->eoa)

    /* Seek to the correct location */
    if(addr != file->pos || OP_READ != file->op) {
        if(HDlseek(file->fd, (HDoff_t)addr, SEEK_SET) < 0)
            HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
    } /* end if */

    /* Read data, being careful of interrupted system calls, partial results,
     * and the end of the file.
     */
    while(size > 0) {

        h5_sec2_io_t        bytes_in        = 0;    /* # of bytes to read       */
        h5_sec2_io_ret_t    bytes_read      = -1;   /* # of bytes actually read */ 

        /* Trying to read more bytes than the return type can handle is
         * undefined behavior in POSIX.
         */
        if(size > H5_SEC2_MAX_IO_BYTES_g)
            bytes_in = H5_SEC2_MAX_IO_BYTES_g;
        else
            bytes_in = (h5_sec2_io_t)size;

        do {
            bytes_read = HDread(file->fd, buf, bytes_in);
        } while(-1 == bytes_read && EINTR == errno);
        
        if(-1 == bytes_read) { /* error */
            int myerrno = errno;
            time_t mytime = HDtime(NULL);
            HDoff_t myoffset = HDlseek(file->fd, (HDoff_t)0, SEEK_CUR);

            HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed: time = %s, filename = '%s', file descriptor = %d, errno = %d, error message = '%s', buf = %p, size = %lu, offset = %llu", HDctime(&mytime), file->filename, file->fd, myerrno, HDstrerror(myerrno), buf, (unsigned long)size, (unsigned long long)myoffset);
        } /* end if */
        
        if(0 == bytes_read) {
            /* end of file but not end of format address space */
            HDmemset(buf, 0, size);
            break;
        } /* end if */
        
        HDassert(bytes_read >= 0);
        HDassert((size_t)bytes_read <= size);
        
        size -= (size_t)bytes_read;
        addr += (haddr_t)bytes_read;
        buf = (char *)buf + bytes_read;
    } /* end while */

    /* Update current position */
    file->pos = addr;
    file->op = OP_READ;

done:
    if(ret_value < 0) {
        /* Reset last file I/O information */
        file->pos = HADDR_UNDEF;
        file->op = OP_UNKNOWN;
    } /* end if */

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_sec2_read() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_write
 *
 * Purpose:	Writes SIZE bytes of data to FILE beginning at address ADDR
 *		from buffer BUF according to data transfer properties in
 *		DXPL_ID.
 *
 * Return:	Success:	Zero
 *		Failure:	-1
 *
 * Programmer:	Robb Matzke
 *              Thursday, July 29, 1999
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static herr_t
H5FD_sec2_write(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id,
                haddr_t addr, size_t size, const void *buf)
{
    H5FD_sec2_t     *file       = (H5FD_sec2_t *)_file;
    herr_t          ret_value   = SUCCEED;                  /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    HDassert(file && file->pub.cls);
    HDassert(buf);

    /* Check for overflow conditions */
    if(!H5F_addr_defined(addr))
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "addr undefined, addr = %llu", (unsigned long long)addr)
    if(REGION_OVERFLOW(addr, size))
        HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu, size = %llu", (unsigned long long)addr, (unsigned long long)size)
    if((addr + size) > file->eoa)
        HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu, size = %llu, eoa = %llu", (unsigned long long)addr, (unsigned long long)size, (unsigned long long)file->eoa)

    /* Seek to the correct location */
    if(addr != file->pos || OP_WRITE != file->op) {
        if(HDlseek(file->fd, (HDoff_t)addr, SEEK_SET) < 0)
            HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
    } /* end if */

    /* Write the data, being careful of interrupted system calls and partial
     * results
     */
    while(size > 0) {

        h5_sec2_io_t        bytes_in        = 0;    /* # of bytes to write  */
        h5_sec2_io_ret_t    bytes_wrote     = -1;   /* # of bytes written   */ 

        /* Trying to write more bytes than the return type can handle is
         * undefined behavior in POSIX.
         */
        if(size > H5_SEC2_MAX_IO_BYTES_g)
            bytes_in = H5_SEC2_MAX_IO_BYTES_g;
        else
            bytes_in = (h5_sec2_io_t)size;

        do {
            bytes_wrote = HDwrite(file->fd, buf, bytes_in);
        } while(-1 == bytes_wrote && EINTR == errno);
        
        if(-1 == bytes_wrote) { /* error */
            int myerrno = errno;
            time_t mytime = HDtime(NULL);
            HDoff_t myoffset = HDlseek(file->fd, (HDoff_t)0, SEEK_CUR);

            HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed: time = %s, filename = '%s', file descriptor = %d, errno = %d, error message = '%s', buf = %p, size = %lu, offset = %llu", HDctime(&mytime), file->filename, file->fd, myerrno, HDstrerror(myerrno), buf, (unsigned long)size, (unsigned long long)myoffset);
        } /* end if */
        
        HDassert(bytes_wrote > 0);
        HDassert((size_t)bytes_wrote <= size);

        size -= (size_t)bytes_wrote;
        addr += (haddr_t)bytes_wrote;
        buf = (const char *)buf + bytes_wrote;
    } /* end while */

    /* Update current position and eof */
    file->pos = addr;
    file->op = OP_WRITE;
    if(file->pos > file->eof)
        file->eof = file->pos;

done:
    if(ret_value < 0) {
        /* Reset last file I/O information */
        file->pos = HADDR_UNDEF;
        file->op = OP_UNKNOWN;
    } /* end if */

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_sec2_write() */


/*-------------------------------------------------------------------------
 * Function:	H5FD_sec2_truncate
 *
 * Purpose:	Makes sure that the true file size is the same (or larger)
 *		than the end-of-address.
 *
 * Return:	Success:	Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *              Wednesday, August  4, 1999
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static herr_t
H5FD_sec2_truncate(H5FD_t *_file, hid_t UNUSED dxpl_id, hbool_t UNUSED closing)
{
    H5FD_sec2_t *file = (H5FD_sec2_t *)_file;
    herr_t ret_value = SUCCEED;                 /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    HDassert(file);

    /* Extend the file to make sure it's large enough */
    if(!H5F_addr_eq(file->eoa, file->eof)) {
#ifdef H5_HAVE_WIN32_API
        LARGE_INTEGER   li;         /* 64-bit (union) integer for SetFilePointer() call */
        DWORD           dwPtrLow;   /* Low-order pointer bits from SetFilePointer()
                                     * Only used as an error code here.
                                     */
        DWORD           dwError;    /* DWORD error code from GetLastError() */
        BOOL            bError;     /* Boolean error flag */

        /* Windows uses this odd QuadPart union for 32/64-bit portability */
        li.QuadPart = (__int64)file->eoa;

        /* Extend the file to make sure it's large enough.
         *
         * Since INVALID_SET_FILE_POINTER can technically be a valid return value
         * from SetFilePointer(), we also need to check GetLastError().
         */
        dwPtrLow = SetFilePointer(file->hFile, li.LowPart, &li.HighPart, FILE_BEGIN);
        if(INVALID_SET_FILE_POINTER == dwPtrLow) {
            dwError = GetLastError();
            if(dwError != NO_ERROR )
                HGOTO_ERROR(H5E_FILE, H5E_FILEOPEN, FAIL, "unable to set file pointer")
        }

        bError = SetEndOfFile(file->hFile);
        if(0 == bError)
            HGOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to extend file properly")
#else /* H5_HAVE_WIN32_API */
#ifdef H5_VMS
        /* Reset seek offset to the beginning of the file, so that the file isn't
         * re-extended later.  This may happen on Open VMS. */
        if(-1 == HDlseek(file->fd, (HDoff_t)0, SEEK_SET))
            HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
#endif
        if(-1 == HDftruncate(file->fd, (HDoff_t)file->eoa))
            HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to extend file properly")
#endif /* H5_HAVE_WIN32_API */

        /* Update the eof value */
        file->eof = file->eoa;

        /* Reset last file I/O information */
        file->pos = HADDR_UNDEF;
        file->op = OP_UNKNOWN;
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_sec2_truncate() */
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