mirror of
https://github.com/HDFGroup/hdf5.git
synced 2024-12-27 08:01:04 +08:00
b4ff3e6e79
Remove another call to H5E_clear_stack() from within the library.
Clean up lots of compiler warnings.
Tested on:
Mac OS X/32 10.5.6 (amazon)
(followup on other platforms forthcoming)
1308 lines
42 KiB
C
1308 lines
42 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the files COPYING and Copyright.html. COPYING can be found at the root *
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* of the source code distribution tree; Copyright.html can be found at the *
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* root level of an installed copy of the electronic HDF5 document set and *
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* is linked from the top-level documents page. It can also be found at *
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* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
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* access to either file, you may request a copy from help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*
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* Programmer: Raymond Lu <slu@hdfgroup.uiuc.edu>
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* Wednesday, 20 September 2006
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*
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* Purpose: The Direct I/O file driver forces the data to be written to
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* the file directly without being copied into system kernel
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* buffer. The main system support this feature is Linux.
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*/
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/* Interface initialization */
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#define H5_INTERFACE_INIT_FUNC H5FD_direct_init_interface
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/* For system function posix_memalign - Commented it out because copper isn't able to compile
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* this file. */
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/* #define _XOPEN_SOURCE 600 */
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#include "H5private.h" /* Generic Functions */
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#include "H5Eprivate.h" /* Error handling */
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#include "H5Fprivate.h" /* File access */
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#include "H5FDprivate.h" /* File drivers */
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#include "H5FDdirect.h" /* Direct file driver */
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#include "H5FLprivate.h" /* Free Lists */
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#include "H5Iprivate.h" /* IDs */
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#include "H5MMprivate.h" /* Memory management */
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#include "H5Pprivate.h" /* Property lists */
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#ifdef H5_HAVE_DIRECT
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/* The driver identification number, initialized at runtime */
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static hid_t H5FD_DIRECT_g = 0;
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/* File operations */
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#define OP_UNKNOWN 0
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#define OP_READ 1
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#define OP_WRITE 2
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/* Driver-specific file access properties */
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typedef struct H5FD_direct_fapl_t {
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size_t mboundary; /* Memory boundary for alignment */
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size_t fbsize; /* File system block size */
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size_t cbsize; /* Maximal buffer size for copying user data */
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hbool_t must_align; /* Decides if data alignment is required */
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} H5FD_direct_fapl_t;
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/*
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* The description of a file belonging to this driver. The `eoa' and `eof'
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* determine the amount of hdf5 address space in use and the high-water mark
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* of the file (the current size of the underlying Unix file). The `pos'
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* value is used to eliminate file position updates when they would be a
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* no-op. Unfortunately we've found systems that use separate file position
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* indicators for reading and writing so the lseek can only be eliminated if
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* the current operation is the same as the previous operation. When opening
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* a file the `eof' will be set to the current file size, `eoa' will be set
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* to zero, `pos' will be set to H5F_ADDR_UNDEF (as it is when an error
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* occurs), and `op' will be set to H5F_OP_UNKNOWN.
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*/
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typedef struct H5FD_direct_t {
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H5FD_t pub; /*public stuff, must be first */
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int fd; /*the unix file */
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haddr_t eoa; /*end of allocated region */
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haddr_t eof; /*end of file; current file size*/
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haddr_t pos; /*current file I/O position */
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int op; /*last operation */
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H5FD_direct_fapl_t fa; /*file access properties */
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#ifndef _WIN32
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/*
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* On most systems the combination of device and i-node number uniquely
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* identify a file.
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*/
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dev_t device; /*file device number */
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#ifdef H5_VMS
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ino_t inode[3]; /*file i-node number */
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#else
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ino_t inode; /*file i-node number */
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#endif /*H5_VMS*/
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#else
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/*
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* On _WIN32 the low-order word of a unique identifier associated with the
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* file and the volume serial number uniquely identify a file. This number
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* (which, both? -rpm) may change when the system is restarted or when the
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* file is opened. After a process opens a file, the identifier is
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* constant until the file is closed. An application can use this
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* identifier and the volume serial number to determine whether two
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* handles refer to the same file.
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*/
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DWORD fileindexlo;
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DWORD fileindexhi;
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#endif
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} H5FD_direct_t;
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/*
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* This driver supports systems that have the lseek64() function by defining
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* some macros here so we don't have to have conditional compilations later
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* throughout the code.
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*
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* file_offset_t: The datatype for file offsets, the second argument of
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* the lseek() or lseek64() call.
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*
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* file_seek: The function which adjusts the current file position,
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* either lseek() or lseek64().
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*/
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/* adding for windows NT file system support. */
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#ifdef H5_HAVE_LSEEK64
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# define file_offset_t off64_t
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# define file_seek lseek64
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# define file_truncate ftruncate64
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#elif defined (_WIN32) && !defined(__MWERKS__)
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# /*MSVC*/
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# define file_offset_t __int64
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# define file_seek _lseeki64
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# define file_truncate _chsize
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#else
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# define file_offset_t off_t
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# define file_seek lseek
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# define file_truncate HDftruncate
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#endif
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/*
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* These macros check for overflow of various quantities. These macros
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* assume that file_offset_t is signed and haddr_t and size_t are unsigned.
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*
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* ADDR_OVERFLOW: Checks whether a file address of type `haddr_t'
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* is too large to be represented by the second argument
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* of the file seek function.
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*
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* SIZE_OVERFLOW: Checks whether a buffer size of type `hsize_t' is too
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* large to be represented by the `size_t' type.
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*
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* REGION_OVERFLOW: Checks whether an address and size pair describe data
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* which can be addressed entirely by the second
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* argument of the file seek function.
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*/
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#define MAXADDR (((haddr_t)1<<(8*sizeof(file_offset_t)-1))-1)
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#define ADDR_OVERFLOW(A) (HADDR_UNDEF==(A) || \
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((A) & ~(haddr_t)MAXADDR))
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#define SIZE_OVERFLOW(Z) ((Z) & ~(hsize_t)MAXADDR)
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#define REGION_OVERFLOW(A,Z) (ADDR_OVERFLOW(A) || SIZE_OVERFLOW(Z) || \
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HADDR_UNDEF==(A)+(Z) || \
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(file_offset_t)((A)+(Z))<(file_offset_t)(A))
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/* Prototypes */
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static void *H5FD_direct_fapl_get(H5FD_t *file);
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static void *H5FD_direct_fapl_copy(const void *_old_fa);
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static H5FD_t *H5FD_direct_open(const char *name, unsigned flags, hid_t fapl_id,
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haddr_t maxaddr);
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static herr_t H5FD_direct_close(H5FD_t *_file);
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static int H5FD_direct_cmp(const H5FD_t *_f1, const H5FD_t *_f2);
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static herr_t H5FD_direct_query(const H5FD_t *_f1, unsigned long *flags);
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static haddr_t H5FD_direct_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
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static herr_t H5FD_direct_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
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static haddr_t H5FD_direct_get_eof(const H5FD_t *_file);
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static herr_t H5FD_direct_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
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static herr_t H5FD_direct_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
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size_t size, void *buf);
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static herr_t H5FD_direct_write(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr,
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size_t size, const void *buf);
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static herr_t H5FD_direct_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing);
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static const H5FD_class_t H5FD_direct_g = {
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"direct", /*name */
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MAXADDR, /*maxaddr */
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H5F_CLOSE_WEAK, /* fc_degree */
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NULL, /*sb_size */
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NULL, /*sb_encode */
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NULL, /*sb_decode */
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sizeof(H5FD_direct_fapl_t), /*fapl_size */
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H5FD_direct_fapl_get, /*fapl_get */
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H5FD_direct_fapl_copy, /*fapl_copy */
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NULL, /*fapl_free */
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0, /*dxpl_size */
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NULL, /*dxpl_copy */
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NULL, /*dxpl_free */
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H5FD_direct_open, /*open */
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H5FD_direct_close, /*close */
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H5FD_direct_cmp, /*cmp */
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H5FD_direct_query, /*query */
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NULL, /*get_type_map */
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NULL, /*alloc */
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NULL, /*free */
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H5FD_direct_get_eoa, /*get_eoa */
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H5FD_direct_set_eoa, /*set_eoa */
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H5FD_direct_get_eof, /*get_eof */
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H5FD_direct_get_handle, /*get_handle */
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H5FD_direct_read, /*read */
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H5FD_direct_write, /*write */
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NULL, /*flush */
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H5FD_direct_truncate, /*truncate */
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NULL, /*lock */
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NULL, /*unlock */
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H5FD_FLMAP_SINGLE /*fl_map */
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};
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/* Declare a free list to manage the H5FD_direct_t struct */
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H5FL_DEFINE_STATIC(H5FD_direct_t);
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/*--------------------------------------------------------------------------
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NAME
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H5FD_direct_init_interface -- Initialize interface-specific information
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USAGE
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herr_t H5FD_direct_init_interface()
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RETURNS
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Non-negative on success/Negative on failure
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DESCRIPTION
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Initializes any interface-specific data or routines. (Just calls
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H5FD_direct_init currently).
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--------------------------------------------------------------------------*/
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static herr_t
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H5FD_direct_init_interface(void)
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{
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FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5FD_direct_init_interface)
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FUNC_LEAVE_NOAPI(H5FD_direct_init())
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} /* H5FD_direct_init_interface() */
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/*-------------------------------------------------------------------------
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* Function: H5FD_direct_init
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*
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* Purpose: Initialize this driver by registering the driver with the
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* library.
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*
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* Return: Success: The driver ID for the direct driver.
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*
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* Failure: Negative.
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*
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* Programmer: Raymond Lu
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* Wednesday, 20 September 2006
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*
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* Modifications:
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*
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*-------------------------------------------------------------------------
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*/
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hid_t
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H5FD_direct_init(void)
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{
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hid_t ret_value; /* Return value */
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FUNC_ENTER_NOAPI(H5FD_direct_init, FAIL)
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if (H5I_VFL!=H5I_get_type(H5FD_DIRECT_g))
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H5FD_DIRECT_g = H5FD_register(&H5FD_direct_g,sizeof(H5FD_class_t),FALSE);
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/* Set return value */
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ret_value=H5FD_DIRECT_g;
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done:
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FUNC_LEAVE_NOAPI(ret_value)
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}
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/*---------------------------------------------------------------------------
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* Function: H5FD_direct_term
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*
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* Purpose: Shut down the VFD
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*
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* Return: <none>
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*
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* Programmer: Raymond Lu
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* Wednesday, 20 September 2006
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*
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* Modification:
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*
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*---------------------------------------------------------------------------
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*/
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void
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H5FD_direct_term(void)
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{
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FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5FD_direct_term)
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/* Reset VFL ID */
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H5FD_DIRECT_g=0;
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FUNC_LEAVE_NOAPI_VOID
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} /* end H5FD_direct_term() */
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/*-------------------------------------------------------------------------
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* Function: H5Pset_fapl_direct
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*
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* Purpose: Modify the file access property list to use the H5FD_DIRECT
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* driver defined in this source file. There are no driver
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* specific properties.
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*
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* Return: Non-negative on success/Negative on failure
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*
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* Programmer: Raymond Lu
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* Wednesday, 20 September 2006
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*
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* Modifications:
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*
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*-------------------------------------------------------------------------
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*/
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herr_t
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H5Pset_fapl_direct(hid_t fapl_id, size_t boundary, size_t block_size, size_t cbuf_size)
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{
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H5P_genplist_t *plist; /* Property list pointer */
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H5FD_direct_fapl_t fa;
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herr_t ret_value;
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FUNC_ENTER_API(H5Pset_fapl_direct, FAIL)
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H5TRACE4("e", "izzz", fapl_id, boundary, block_size, cbuf_size);
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if(NULL == (plist = H5P_object_verify(fapl_id,H5P_FILE_ACCESS)))
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HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
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if(boundary != 0)
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fa.mboundary = boundary;
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else
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fa.mboundary = MBOUNDARY_DEF;
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if(block_size != 0)
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fa.fbsize = block_size;
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else
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fa.fbsize = FBSIZE_DEF;
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if(cbuf_size != 0)
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fa.cbsize = cbuf_size;
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else
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fa.cbsize = CBSIZE_DEF;
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/* Set the default to be true for data alignment */
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fa.must_align = TRUE;
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/* Copy buffer size must be a multiple of file block size */
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if(fa.cbsize % fa.fbsize != 0)
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HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "copy buffer size must be a multiple of block size")
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ret_value= H5P_set_driver(plist, H5FD_DIRECT, &fa);
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done:
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FUNC_LEAVE_API(ret_value)
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}
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/*-------------------------------------------------------------------------
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* Function: H5Pget_fapl_direct
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*
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* Purpose: Returns information about the direct file access property
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* list though the function arguments.
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*
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* Return: Success: Non-negative
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*
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* Failure: Negative
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*
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* Programmer: Raymond Lu
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* Wednesday, October 18, 2006
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*
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* Modifications:
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*
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*-------------------------------------------------------------------------
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*/
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herr_t
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H5Pget_fapl_direct(hid_t fapl_id, size_t *boundary/*out*/, size_t *block_size/*out*/,
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size_t *cbuf_size/*out*/)
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{
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H5FD_direct_fapl_t *fa;
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H5P_genplist_t *plist; /* Property list pointer */
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herr_t ret_value=SUCCEED; /* Return value */
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FUNC_ENTER_API(H5Pget_fapl_direct, FAIL)
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H5TRACE4("e", "ixxx", fapl_id, boundary, block_size, cbuf_size);
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if(NULL == (plist = H5P_object_verify(fapl_id,H5P_FILE_ACCESS)))
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HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access list")
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if (H5FD_DIRECT!=H5P_get_driver(plist))
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HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "incorrect VFL driver")
|
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if (NULL==(fa=H5P_get_driver_info(plist)))
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HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "bad VFL driver info")
|
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if (boundary)
|
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*boundary = fa->mboundary;
|
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if (block_size)
|
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*block_size = fa->fbsize;
|
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if (cbuf_size)
|
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*cbuf_size = fa->cbsize;
|
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|
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done:
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FUNC_LEAVE_API(ret_value)
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}
|
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|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_fapl_get
|
||
*
|
||
* Purpose: Returns a file access property list which indicates how the
|
||
* specified file is being accessed. The return list could be
|
||
* used to access another file the same way.
|
||
*
|
||
* Return: Success: Ptr to new file access property list with all
|
||
* members copied from the file struct.
|
||
*
|
||
* Failure: NULL
|
||
*
|
||
* Programmer: Raymond Lu
|
||
* Wednesday, 18 October 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static void *
|
||
H5FD_direct_fapl_get(H5FD_t *_file)
|
||
{
|
||
H5FD_direct_t *file = (H5FD_direct_t*)_file;
|
||
void *ret_value; /* Return value */
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_fapl_get, NULL)
|
||
|
||
/* Set return value */
|
||
ret_value= H5FD_direct_fapl_copy(&(file->fa));
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
} /* end H5FD_direct_fapl_get() */
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_fapl_copy
|
||
*
|
||
* Purpose: Copies the direct-specific file access properties.
|
||
*
|
||
* Return: Success: Ptr to a new property list
|
||
*
|
||
* Failure: NULL
|
||
*
|
||
* Programmer: Raymond Lu
|
||
* Wednesday, 18 October 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static void *
|
||
H5FD_direct_fapl_copy(const void *_old_fa)
|
||
{
|
||
const H5FD_direct_fapl_t *old_fa = (const H5FD_direct_fapl_t*)_old_fa;
|
||
H5FD_direct_fapl_t *new_fa = H5MM_malloc(sizeof(H5FD_direct_fapl_t));
|
||
void *ret_value; /* Return value */
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_fapl_copy, NULL)
|
||
|
||
assert(new_fa);
|
||
|
||
/* Copy the general information */
|
||
HDmemcpy(new_fa, old_fa, sizeof(H5FD_direct_fapl_t));
|
||
|
||
/* Set return value */
|
||
ret_value=new_fa;
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
} /* end H5FD_direct_fapl_copy() */
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_open
|
||
*
|
||
* Purpose: Create and/or opens a Unix file for direct I/O 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: Raymond Lu
|
||
* Wednesday, 20 September 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static H5FD_t *
|
||
H5FD_direct_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr)
|
||
{
|
||
int o_flags;
|
||
int fd=(-1);
|
||
H5FD_direct_t *file=NULL;
|
||
H5FD_direct_fapl_t *fa;
|
||
#ifdef _WIN32
|
||
HFILE filehandle;
|
||
struct _BY_HANDLE_FILE_INFORMATION fileinfo;
|
||
#endif
|
||
h5_stat_t sb;
|
||
H5P_genplist_t *plist; /* Property list */
|
||
int *buf1, *buf2;
|
||
H5FD_t *ret_value;
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_open, NULL)
|
||
|
||
/* Sanity check on file offsets */
|
||
assert(sizeof(file_offset_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;
|
||
|
||
/* Flag for Direct I/O */
|
||
o_flags |= O_DIRECT;
|
||
|
||
/* Open the file */
|
||
if ((fd=HDopen(name, o_flags, 0666))<0)
|
||
HSYS_GOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file")
|
||
|
||
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_direct_t)))
|
||
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "unable to allocate file struct")
|
||
|
||
/* Get the driver specific information */
|
||
if(NULL == (plist = H5P_object_verify(fapl_id,H5P_FILE_ACCESS)))
|
||
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list")
|
||
fa = H5P_get_driver_info(plist);
|
||
|
||
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 _WIN32
|
||
filehandle = _get_osfhandle(fd);
|
||
(void)GetFileInformationByHandle((HANDLE)filehandle, &fileinfo);
|
||
file->fileindexhi = fileinfo.nFileIndexHigh;
|
||
file->fileindexlo = fileinfo.nFileIndexLow;
|
||
#else
|
||
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
|
||
file->inode = sb.st_ino;
|
||
#endif /*H5_VMS*/
|
||
#endif /*_WIN32*/
|
||
file->fa.mboundary = fa->mboundary;
|
||
file->fa.fbsize = fa->fbsize;
|
||
file->fa.cbsize = fa->cbsize;
|
||
|
||
/* Try to decide if data alignment is required. The reason to check it here
|
||
* is to handle correctly the case that the file is in a different file system
|
||
* than the one where the program is running.
|
||
*/
|
||
buf1 = (int*)HDmalloc(sizeof(int));
|
||
if (HDposix_memalign(&buf2, file->fa.mboundary, file->fa.fbsize) != 0)
|
||
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, NULL, "HDposix_memalign failed")
|
||
|
||
if(o_flags &= O_CREAT) {
|
||
if(write(file->fd, (void*)buf1, sizeof(int))<0) {
|
||
if(write(file->fd, (void*)buf2, file->fa.fbsize)<0)
|
||
HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, NULL, "file system may not support Direct I/O")
|
||
else
|
||
file->fa.must_align = TRUE;
|
||
} else {
|
||
file->fa.must_align = FALSE;
|
||
file_truncate(file->fd, (file_offset_t)0);
|
||
}
|
||
} else {
|
||
if(read(file->fd, (void*)buf1, sizeof(int))<0) {
|
||
if(read(file->fd, (void*)buf2, file->fa.fbsize)<0)
|
||
HGOTO_ERROR(H5E_FILE, H5E_READERROR, NULL, "file system may not support Direct I/O")
|
||
else
|
||
file->fa.must_align = TRUE;
|
||
} else
|
||
file->fa.must_align = FALSE;
|
||
}
|
||
|
||
if(buf1)
|
||
HDfree(buf1);
|
||
if(buf2)
|
||
HDfree(buf2);
|
||
|
||
/* Set return value */
|
||
ret_value=(H5FD_t*)file;
|
||
|
||
done:
|
||
if(ret_value==NULL) {
|
||
if(fd>=0)
|
||
HDclose(fd);
|
||
} /* end if */
|
||
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_close
|
||
*
|
||
* Purpose: Closes the file.
|
||
*
|
||
* Return: Success: 0
|
||
*
|
||
* Failure: -1, file not closed.
|
||
*
|
||
* Programmer: Raymond Lu
|
||
* Wednesday, 20 September 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static herr_t
|
||
H5FD_direct_close(H5FD_t *_file)
|
||
{
|
||
H5FD_direct_t *file = (H5FD_direct_t*)_file;
|
||
herr_t ret_value=SUCCEED; /* Return value */
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_close, FAIL)
|
||
|
||
if (HDclose(file->fd)<0)
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_CANTCLOSEFILE, FAIL, "unable to close file")
|
||
|
||
H5FL_FREE(H5FD_direct_t,file);
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_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: Raymond Lu
|
||
* Thursday, 21 September 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static int
|
||
H5FD_direct_cmp(const H5FD_t *_f1, const H5FD_t *_f2)
|
||
{
|
||
const H5FD_direct_t *f1 = (const H5FD_direct_t*)_f1;
|
||
const H5FD_direct_t *f2 = (const H5FD_direct_t*)_f2;
|
||
int ret_value=0;
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_cmp, H5FD_VFD_DEFAULT)
|
||
|
||
#ifdef _WIN32
|
||
if (f1->fileindexhi < f2->fileindexhi) HGOTO_DONE(-1)
|
||
if (f1->fileindexhi > f2->fileindexhi) HGOTO_DONE(1)
|
||
|
||
if (f1->fileindexlo < f2->fileindexlo) HGOTO_DONE(-1)
|
||
if (f1->fileindexlo > f2->fileindexlo) HGOTO_DONE(1)
|
||
|
||
#else
|
||
#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 */
|
||
|
||
#ifndef H5_VMS
|
||
if (f1->inode < f2->inode) HGOTO_DONE(-1)
|
||
if (f1->inode > f2->inode) HGOTO_DONE(1)
|
||
#else
|
||
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)
|
||
#endif /*H5_VMS*/
|
||
|
||
#endif
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_query
|
||
*
|
||
* Purpose: Set the flags that this VFL driver is capable of supporting.
|
||
* (listed in H5FDpublic.h)
|
||
*
|
||
* Return: Success: non-negative
|
||
*
|
||
* Failure: negative
|
||
*
|
||
* Programmer: Raymond Lu
|
||
* Thursday, 21 September 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static herr_t
|
||
H5FD_direct_query(const H5FD_t UNUSED * _f, unsigned long *flags /* out */)
|
||
{
|
||
herr_t ret_value=SUCCEED;
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_query, FAIL)
|
||
|
||
/* 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 */
|
||
}
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_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: Raymond Lu
|
||
* Wednesday, 20 September 2006
|
||
*
|
||
* Modifications:
|
||
* Raymond Lu
|
||
* 21 Dec. 2006
|
||
* Added the parameter TYPE. It's only used for MULTI driver.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static haddr_t
|
||
H5FD_direct_get_eoa(const H5FD_t *_file, H5FD_mem_t UNUSED type)
|
||
{
|
||
const H5FD_direct_t *file = (const H5FD_direct_t*)_file;
|
||
haddr_t ret_value; /* Return value */
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_get_eoa, HADDR_UNDEF)
|
||
|
||
/* Set return value */
|
||
ret_value=file->eoa;
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_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: Raymond Lu
|
||
* Wednesday, 20 September 2006
|
||
*
|
||
* Modifications:
|
||
* Raymond Lu
|
||
* 21 Dec. 2006
|
||
* Added the parameter TYPE. It's only used for MULTI driver.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static herr_t
|
||
H5FD_direct_set_eoa(H5FD_t *_file, H5FD_mem_t UNUSED type, haddr_t addr)
|
||
{
|
||
H5FD_direct_t *file = (H5FD_direct_t*)_file;
|
||
herr_t ret_value=SUCCEED; /* Return value */
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_set_eoa, FAIL)
|
||
|
||
file->eoa = addr;
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_get_eof
|
||
*
|
||
* Purpose: Returns the end-of-file marker, which is the greater of
|
||
* either the Unix 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 Unix file
|
||
* or the HDF5 file.
|
||
*
|
||
* Failure: HADDR_UNDEF
|
||
*
|
||
* Programmer: Raymond Lu
|
||
* Wednesday, 20 September 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static haddr_t
|
||
H5FD_direct_get_eof(const H5FD_t *_file)
|
||
{
|
||
const H5FD_direct_t *file = (const H5FD_direct_t*)_file;
|
||
haddr_t ret_value; /* Return value */
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_get_eof, HADDR_UNDEF)
|
||
|
||
/* Set return value */
|
||
ret_value=MAX(file->eof, file->eoa);
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_diect_get_handle
|
||
*
|
||
* Purpose: Returns the file handle of direct file driver.
|
||
*
|
||
* Returns: Non-negative if succeed or negative if fails.
|
||
*
|
||
* Programmer: Raymond Lu
|
||
* 21 September 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static herr_t
|
||
H5FD_direct_get_handle(H5FD_t *_file, hid_t UNUSED fapl, void** file_handle)
|
||
{
|
||
H5FD_direct_t *file = (H5FD_direct_t *)_file;
|
||
herr_t ret_value = SUCCEED;
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_get_handle, FAIL)
|
||
|
||
if(!file_handle)
|
||
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "file handle not valid")
|
||
*file_handle = &(file->fd);
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_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: Raymond Lu
|
||
* Thursday, 21 September 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static herr_t
|
||
H5FD_direct_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, haddr_t addr,
|
||
size_t size, void *buf/*out*/)
|
||
{
|
||
H5FD_direct_t *file = (H5FD_direct_t*)_file;
|
||
ssize_t nbytes;
|
||
hbool_t _must_align = TRUE;
|
||
herr_t ret_value=SUCCEED; /* Return value */
|
||
size_t alloc_size;
|
||
void *copy_buf, *p2, *p3;
|
||
size_t _boundary;
|
||
size_t _fbsize;
|
||
size_t _cbsize;
|
||
haddr_t copy_addr = addr;
|
||
size_t copy_size = size;
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_read, FAIL)
|
||
|
||
assert(file && file->pub.cls);
|
||
assert(buf);
|
||
|
||
/* Check for overflow conditions */
|
||
if (HADDR_UNDEF==addr)
|
||
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "addr undefined")
|
||
if (REGION_OVERFLOW(addr, size))
|
||
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
|
||
if (addr+size>file->eoa)
|
||
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
|
||
|
||
/* If the system doesn't require data to be aligned, read the data in
|
||
* the same way as sec2 driver.
|
||
*/
|
||
_must_align = file->fa.must_align;
|
||
|
||
/* Get the memory boundary for alignment, file system block size, and maximal
|
||
* copy buffer size.
|
||
*/
|
||
_boundary = file->fa.mboundary;
|
||
_fbsize = file->fa.fbsize;
|
||
_cbsize = file->fa.cbsize;
|
||
|
||
/* if the data is aligned or the system doesn't require data to be aligned,
|
||
* read it directly from the file. If not, read a bigger
|
||
* and aligned data first, then copy the data into memory buffer.
|
||
*/
|
||
if(!_must_align || ((addr%_fbsize==0) && (size%_fbsize==0) && ((size_t)buf%_boundary==0))) {
|
||
/* Seek to the correct location */
|
||
if ((addr!=file->pos || OP_READ!=file->op) &&
|
||
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0)
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
|
||
/* Read the aligned data in file first, being careful of interrupted
|
||
* system calls and partial results. */
|
||
while (size>0) {
|
||
do {
|
||
nbytes = HDread(file->fd, buf, size);
|
||
} while (-1==nbytes && EINTR==errno);
|
||
if (-1==nbytes) /* error */
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed")
|
||
if (0==nbytes) {
|
||
/* end of file but not end of format address space */
|
||
HDmemset(buf, 0, size);
|
||
break;
|
||
}
|
||
assert(nbytes>=0);
|
||
assert((size_t)nbytes<=size);
|
||
H5_CHECK_OVERFLOW(nbytes,ssize_t,size_t);
|
||
size -= (size_t)nbytes;
|
||
H5_CHECK_OVERFLOW(nbytes,ssize_t,haddr_t);
|
||
addr += (haddr_t)nbytes;
|
||
buf = (char*)buf + nbytes;
|
||
}
|
||
} else {
|
||
/* allocate memory needed for the Direct IO option up to the maximal
|
||
* copy buffer size. Make a bigger buffer for aligned I/O if size is
|
||
* smaller than maximal copy buffer. */
|
||
if(size < _cbsize)
|
||
alloc_size = ((size / _fbsize) * _fbsize) + _fbsize;
|
||
else
|
||
alloc_size = _cbsize;
|
||
if (HDposix_memalign(©_buf, _boundary, alloc_size) != 0)
|
||
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "HDposix_memalign failed")
|
||
|
||
/* look for the aligned position for reading the data */
|
||
if(file_seek(file->fd, (file_offset_t)(copy_addr - copy_addr % _fbsize), SEEK_SET) < 0)
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
|
||
|
||
/*
|
||
* Read the aligned data in file into aligned buffer first, then copy the data
|
||
* into the final buffer. If the data size is bigger than maximal copy buffer
|
||
* size, do the reading by segment (the outer while loop). If not, do one step
|
||
* reading.
|
||
*/
|
||
p3 = buf;
|
||
do {
|
||
/* Read the aligned data in file first. Not able to handle interrupted
|
||
* system calls and partial results like sec2 driver does because the
|
||
* data may no longer be aligned. It's expecially true when the data in
|
||
* file is smaller than ALLOC_SIZE. */
|
||
HDmemset(copy_buf, 0, alloc_size);
|
||
|
||
do {
|
||
nbytes = HDread(file->fd, copy_buf, alloc_size);
|
||
} while(-1==nbytes && EINTR==errno);
|
||
|
||
if (-1==nbytes) /* error */
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed")
|
||
|
||
/* look for the right position and copy the data to the original buffer.
|
||
* Consider all possible situations here: file address is not aligned on
|
||
* file block size; the end of data address is not aligned; the end of data
|
||
* address is aligned; data size is smaller or bigger than maximal copy size.*/
|
||
p2 = (unsigned char*)copy_buf + (size_t)(copy_addr % _fbsize);
|
||
if(size < _cbsize)
|
||
HDmemcpy(p3, p2, size);
|
||
else if(size >= _cbsize && copy_size <= (alloc_size-(size_t)(copy_addr%_fbsize)))
|
||
HDmemcpy(p3, p2, copy_size);
|
||
else if(size >= _cbsize && copy_size > (alloc_size-(size_t)(copy_addr%_fbsize))) {
|
||
HDmemcpy(p3, p2, (alloc_size - (size_t)(copy_addr % _fbsize)));
|
||
p3 = (unsigned char*)p3 + (alloc_size - (size_t)(copy_addr % _fbsize));
|
||
}
|
||
|
||
/* update the size and address of data being read. */
|
||
if(copy_size > (alloc_size - (size_t)(copy_addr % _fbsize)))
|
||
copy_size -= (alloc_size - (size_t)(copy_addr % _fbsize));
|
||
else
|
||
copy_size = 0;
|
||
copy_addr += (alloc_size - (size_t)(copy_addr % _fbsize));
|
||
} while (copy_size > 0);
|
||
|
||
/*Final step: update address and buffer*/
|
||
addr += (haddr_t)size;
|
||
buf = (unsigned char*)buf + size;
|
||
|
||
if(copy_buf)
|
||
HDfree(copy_buf);
|
||
}
|
||
|
||
/* 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)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_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: Raymond Lu
|
||
* Thursday, 21 September 2006
|
||
*
|
||
* Modifications:
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static herr_t
|
||
H5FD_direct_write(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, haddr_t addr,
|
||
size_t size, const void *buf)
|
||
{
|
||
H5FD_direct_t *file = (H5FD_direct_t*)_file;
|
||
ssize_t nbytes;
|
||
hbool_t _must_align = TRUE;
|
||
herr_t ret_value=SUCCEED; /* Return value */
|
||
size_t alloc_size;
|
||
void *copy_buf, *p1;
|
||
const void *p3;
|
||
size_t _boundary;
|
||
size_t _fbsize;
|
||
size_t _cbsize;
|
||
haddr_t copy_addr = addr;
|
||
size_t copy_size = size;
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_write, FAIL)
|
||
|
||
assert(file && file->pub.cls);
|
||
assert(buf);
|
||
|
||
/* Check for overflow conditions */
|
||
if (HADDR_UNDEF==addr)
|
||
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "addr undefined")
|
||
if (REGION_OVERFLOW(addr, size))
|
||
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
|
||
if (addr+size>file->eoa)
|
||
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
|
||
|
||
/* If the system doesn't require data to be aligned, read the data in
|
||
* the same way as sec2 driver.
|
||
*/
|
||
_must_align = file->fa.must_align;
|
||
|
||
/* Get the memory boundary for alignment, file system block size, and maximal
|
||
* copy buffer size.
|
||
*/
|
||
_boundary = file->fa.mboundary;
|
||
_fbsize = file->fa.fbsize;
|
||
_cbsize = file->fa.cbsize;
|
||
|
||
/* if the data is aligned or the system doesn't require data to be aligned,
|
||
* write it directly to the file. If not, read a bigger and aligned data
|
||
* first, update buffer with user data, then write the data out.
|
||
*/
|
||
if(!_must_align || ((addr%_fbsize==0) && (size%_fbsize==0) && ((size_t)buf%_boundary==0))) {
|
||
/* Seek to the correct location */
|
||
if ((addr!=file->pos || OP_WRITE!=file->op) &&
|
||
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0)
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
|
||
|
||
while (size>0) {
|
||
do {
|
||
nbytes = HDwrite(file->fd, buf, size);
|
||
} while (-1==nbytes && EINTR==errno);
|
||
if (-1==nbytes) /* error */
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
|
||
assert(nbytes>0);
|
||
assert((size_t)nbytes<=size);
|
||
H5_CHECK_OVERFLOW(nbytes,ssize_t,size_t);
|
||
size -= (size_t)nbytes;
|
||
H5_CHECK_OVERFLOW(nbytes,ssize_t,haddr_t);
|
||
addr += (haddr_t)nbytes;
|
||
buf = (const char*)buf + nbytes;
|
||
}
|
||
} else {
|
||
/* allocate memory needed for the Direct IO option up to the maximal
|
||
* copy buffer size. Make a bigger buffer for aligned I/O if size is
|
||
* smaller than maximal copy buffer.
|
||
*/
|
||
if(size < _cbsize)
|
||
alloc_size = ((size / _fbsize) * _fbsize) + _fbsize;
|
||
else
|
||
alloc_size = _cbsize;
|
||
|
||
if (HDposix_memalign(©_buf, _boundary, alloc_size) != 0)
|
||
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "HDposix_memalign failed")
|
||
|
||
/* look for the right position for reading the data */
|
||
if(file_seek(file->fd, (file_offset_t)(copy_addr - copy_addr % _fbsize), SEEK_SET) < 0)
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
|
||
|
||
p3 = buf;
|
||
do {
|
||
/*
|
||
* Read the aligned data first if the aligned region doesn't fall
|
||
* entirely in the range to be writen. Not able to handle interrupted
|
||
* system calls and partial results like sec2 driver does because the
|
||
* data may no longer be aligned. It's expecially true when the data in
|
||
* file is smaller than ALLOC_SIZE.
|
||
*/
|
||
HDmemset(copy_buf, 0, alloc_size);
|
||
|
||
if(copy_addr <= addr || (copy_addr + alloc_size) >= (addr + size)) {
|
||
do {
|
||
nbytes = read(file->fd, copy_buf, alloc_size);
|
||
} while (-1==nbytes && EINTR==errno);
|
||
|
||
if (-1==nbytes) /* error */
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed")
|
||
}
|
||
|
||
/* look for the right position and append or copy the data to be written to
|
||
* the aligned buffer.
|
||
* Consider all possible situations here: file address is not aligned on
|
||
* file block size; the end of data address is not aligned; the end of data
|
||
* address is aligned; data size is smaller or bigger than maximal copy size.
|
||
*/
|
||
p1 = (unsigned char*)copy_buf + (size_t)(copy_addr % _fbsize);
|
||
if(size < _cbsize)
|
||
HDmemcpy(p1, p3, size);
|
||
else if(size >= _cbsize && copy_size <= (alloc_size-(size_t)(copy_addr%_fbsize))) {
|
||
HDmemcpy(p1, p3, copy_size);
|
||
}else if(size >= _cbsize && copy_size > (alloc_size-(size_t)(copy_addr%_fbsize))) {
|
||
HDmemcpy(p1, p3, (alloc_size - (size_t)(copy_addr % _fbsize)));
|
||
p3 = (const unsigned char *)p3 + (alloc_size - (size_t)(copy_addr % _fbsize));
|
||
}
|
||
|
||
/*look for the aligned position for writing the data*/
|
||
if(file_seek(file->fd, (file_offset_t)(copy_addr - copy_addr % _fbsize), SEEK_SET) < 0)
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
|
||
|
||
/*
|
||
* Write the data. It doesn't truncate the extra data introduced by
|
||
* alignment because that step is done in H5FD_direct_flush.
|
||
*/
|
||
do {
|
||
nbytes = HDwrite(file->fd, copy_buf, alloc_size);
|
||
} while (-1==nbytes && EINTR==errno);
|
||
|
||
if (-1==nbytes) /* error */
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
|
||
|
||
/* update the size and address of data being read. */
|
||
if(copy_size > (alloc_size - (size_t)(copy_addr % _fbsize)))
|
||
copy_size -= (alloc_size - (size_t)(copy_addr % _fbsize));
|
||
else
|
||
copy_size = 0;
|
||
|
||
copy_addr += (alloc_size - (size_t)(copy_addr % _fbsize));
|
||
} while (copy_size > 0);
|
||
|
||
/*Update the address and size*/
|
||
addr += (haddr_t)size;
|
||
buf = (const char*)buf + size;
|
||
|
||
if(copy_buf)
|
||
HDfree(copy_buf);
|
||
}
|
||
|
||
/* 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)
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
* Function: H5FD_direct_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: Raymond Lu
|
||
* Thursday, 21 September 2006
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
static herr_t
|
||
H5FD_direct_truncate(H5FD_t *_file, hid_t UNUSED dxpl_id, hbool_t UNUSED closing)
|
||
{
|
||
H5FD_direct_t *file = (H5FD_direct_t*)_file;
|
||
herr_t ret_value = SUCCEED; /* Return value */
|
||
|
||
FUNC_ENTER_NOAPI(H5FD_direct_truncate, FAIL)
|
||
|
||
assert(file);
|
||
|
||
/* Extend the file to make sure it's large enough */
|
||
if (file->eoa!=file->eof) {
|
||
#ifdef _WIN32
|
||
HFILE filehandle; /* Windows file handle */
|
||
LARGE_INTEGER li; /* 64-bit integer for SetFilePointer() call */
|
||
|
||
/* Map the posix file handle to a Windows file handle */
|
||
filehandle = _get_osfhandle(file->fd);
|
||
|
||
/* Translate 64-bit integers into form Windows wants */
|
||
/* [This algorithm is from the Windows documentation for SetFilePointer()] */
|
||
li.QuadPart = (LONGLONG)file->eoa;
|
||
(void)SetFilePointer((HANDLE)filehandle,li.LowPart,&li.HighPart,FILE_BEGIN);
|
||
if(SetEndOfFile((HANDLE)filehandle)==0)
|
||
HGOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to extend file properly")
|
||
#else /* _WIN32 */
|
||
if (-1==file_truncate(file->fd, (file_offset_t)file->eoa))
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to extend file properly")
|
||
#endif /* _WIN32 */
|
||
|
||
/* Update the eof value */
|
||
file->eof = file->eoa;
|
||
|
||
/* Reset last file I/O information */
|
||
file->pos = HADDR_UNDEF;
|
||
file->op = OP_UNKNOWN;
|
||
}
|
||
else if (file->fa.must_align){
|
||
/*Even though eof is equal to eoa, file is still truncated because Direct I/O
|
||
*write introduces some extra data for alignment.
|
||
*/
|
||
if (-1==file_truncate(file->fd, (file_offset_t)file->eof))
|
||
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to extend file properly")
|
||
}
|
||
|
||
done:
|
||
FUNC_LEAVE_NOAPI(ret_value)
|
||
} /* end H5FD_direct_truncate() */
|
||
#endif /* H5_HAVE_DIRECT */
|
||
|