1
2
3
4
5
6
7
8
9
10
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
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5MF.c
* Jul 11 1997
* Robb Matzke <matzke@llnl.gov>
*
* Purpose: File memory management functions.
*
* Modifications:
* Robb Matzke, 5 Aug 1997
* Added calls to H5E.
*
* Robb Matzke, 8 Jun 1998
* Implemented a very simple free list which is not persistent and which
* is lossy.
*
*-------------------------------------------------------------------------
*/
#define H5F_PACKAGE /*suppress error about including H5Fpkg */
#include "H5private.h"
#include "H5Eprivate.h"
#include "H5Fpkg.h"
#include "H5FDprivate.h"
#include "H5MFprivate.h"
#define PABLO_MASK H5MF_mask
/* Is the interface initialized? */
static int interface_initialize_g = 0;
#define INTERFACE_INIT NULL
/*-------------------------------------------------------------------------
* Function: H5MF_alloc
*
* Purpose: Allocate SIZE bytes of file memory and return the relative
* address where that contiguous chunk of file memory exists.
* The TYPE argument describes the purpose for which the storage
* is being requested.
*
* Return: Success: The file address of new chunk.
*
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 11 1997
*
* Modifications:
* Robb Matzke, 1999-08-04
* Modified to work with the virtual file layer.
*-------------------------------------------------------------------------
*/
haddr_t
H5MF_alloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, hsize_t size)
{
haddr_t ret_value;
FUNC_ENTER_NOAPI(H5MF_alloc, HADDR_UNDEF);
/* check arguments */
assert(f);
assert(size > 0);
/* Fail if we don't have write access */
if (0==(f->intent & H5F_ACC_RDWR))
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, HADDR_UNDEF, "file is read-only");
/* Allocate space from the virtual file layer */
if (HADDR_UNDEF==(ret_value=H5FD_alloc(f->shared->lf, type, dxpl_id, size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "file allocation failed");
/* Convert absolute file address to relative file address */
assert(ret_value>=f->shared->base_addr);
/* Set return value */
ret_value -= f->shared->base_addr;
done:
FUNC_LEAVE_NOAPI(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5MF_xfree
*
* Purpose: Frees part of a file, making that part of the file
* available for reuse.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 17 1997
*
* Modifications:
* Robb Matzke, 1999-07-28
* The ADDR argument is passed by value
*
* Robb Matzke, 1999-08-03
* Modified to use the virtual file layer.
*-------------------------------------------------------------------------
*/
herr_t
H5MF_xfree(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size)
{
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5MF_xfree, FAIL);
/* check arguments */
assert(f);
if (!H5F_addr_defined(addr) || 0 == size)
HGOTO_DONE(SUCCEED);
assert(addr!=0);
/* Convert relative address to absolute address */
addr += f->shared->base_addr;
/* Allow virtual file layer to free block */
if (H5FD_free(f->shared->lf, type, dxpl_id, addr, size)<0) {
#ifdef H5MF_DEBUG
if (H5DEBUG(MF)) {
fprintf(H5DEBUG(MF),
"H5MF_free: lost %lu bytes of file storage\n",
(unsigned long)size);
}
#endif
}
done:
FUNC_LEAVE_NOAPI(ret_value);
}
/*-------------------------------------------------------------------------
* Function: H5MF_realloc
*
* Purpose: Changes the size of an allocated chunk, possibly moving it to
* a new address. The chunk to change is at address OLD_ADDR
* and is exactly OLD_SIZE bytes (if these are H5F_ADDR_UNDEF
* and zero then this function acts like H5MF_alloc). The new
* size will be NEW_SIZE and its address is the return value (if
* NEW_SIZE is zero then this function acts like H5MF_free and
* an undefined address is returned).
*
* If the new size is less than the old size then the new
* address will be the same as the old address (except for the
* special case where the new size is zero).
*
* If the new size is more than the old size then most likely a
* new address will be returned. However, under certain
* circumstances the library may return the same address.
*
* Return: Success: The relative file address of the new block.
*
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* Thursday, April 16, 1998
*
* Modifications:
* Robb Matzke, 1999-07-28
* The ORIG_ADDR is passed by value. The name of NEW_ADDR has
* been changed to NEW_ADDR_P
*
* Robb Matzke, 1999-08-04
* Modified to work with the virtual file layer.
*-------------------------------------------------------------------------
*/
haddr_t
H5MF_realloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, haddr_t old_addr, hsize_t old_size,
hsize_t new_size)
{
haddr_t ret_value;
FUNC_ENTER_NOAPI(H5MF_realloc, HADDR_UNDEF);
/* Convert old relative address to absolute address */
old_addr += f->shared->base_addr;
/* Reallocate memory from the virtual file layer */
ret_value = H5FD_realloc(f->shared->lf, type, dxpl_id, old_addr, old_size,
new_size);
if (HADDR_UNDEF==ret_value)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "unable to allocate new file memory");
/* Convert return value to relative address */
assert(ret_value>=f->shared->base_addr);
/* Set return value */
ret_value -= f->shared->base_addr;
done:
FUNC_LEAVE_NOAPI(ret_value);
}
|
