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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#define H5F_PACKAGE /*suppress error about including H5Fpkg */
/* Packages needed by this file... */
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5FDprivate.h" /* File drivers */
#include "H5FLprivate.h" /* Free lists */
/* PRIVATE TYPEDEFS */
/* Struct for tracking "shared" file structs */
typedef struct H5F_sfile_node_t {
H5F_file_t *shared; /* Pointer to "shared" file struct */
struct H5F_sfile_node_t *next; /* Pointer to next node */
} H5F_sfile_node_t;
/* PRIVATE PROTOTYPES */
/* PRIVATE VARIABLES */
/* Declare a free list to manage the H5F_sfile_node_t struct */
H5FL_DEFINE_STATIC(H5F_sfile_node_t);
/* Declare a local variable to track the shared file information */
H5F_sfile_node_t *H5F_sfile_head_g = NULL;
/*-------------------------------------------------------------------------
* Function: H5F_sfile_assert_num
*
* Purpose: Sanity checking that shared file list is empty
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* Monday, July 25, 2005
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_sfile_assert_num(unsigned n)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_sfile_assert_num)
if(n == 0) {
/* Sanity checking */
HDassert(H5F_sfile_head_g == NULL);
} /* end if */
else {
unsigned count; /* Number of open shared files */
H5F_sfile_node_t *curr; /* Current shared file node */
/* Iterate through low-level files for matching low-level file info */
curr = H5F_sfile_head_g;
count = 0;
while(curr) {
/* Increment # of open shared file structs */
count++;
/* Advance to next shared file node */
curr = curr->next;
} /* end while */
/* Sanity checking */
HDassert(count == n);
} /* end else */
FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5F_sfile_assert_num() */
/*-------------------------------------------------------------------------
* Function: H5F_sfile_add
*
* Purpose: Add a "shared" file struct to the list of open files
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* Monday, July 18, 2005
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_sfile_add(H5F_file_t *shared)
{
H5F_sfile_node_t *new_shared; /* New shared file node */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5F_sfile_add)
/* Sanity check */
HDassert(shared);
/* Allocate new shared file node */
if (NULL == (new_shared = H5FL_CALLOC(H5F_sfile_node_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
/* Set shared file value */
new_shared->shared = shared;
/* Prepend to list of shared files open */
new_shared->next = H5F_sfile_head_g;
H5F_sfile_head_g = new_shared;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_sfile_add() */
/*-------------------------------------------------------------------------
* Function: H5F_sfile_search
*
* Purpose: Search for a "shared" file with low-level file info that
* matches
*
* Return: Non-NULL on success / NULL on failure
*
* Programmer: Quincey Koziol
* Monday, July 18, 2005
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
H5F_file_t *
H5F_sfile_search(H5FD_t *lf)
{
H5F_sfile_node_t *curr; /* Current shared file node */
H5F_file_t *ret_value = NULL; /* Return value */
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_sfile_search)
/* Sanity check */
HDassert(lf);
/* Iterate through low-level files for matching low-level file info */
curr = H5F_sfile_head_g;
while(curr) {
/* Check for match */
if(0==H5FD_cmp(curr->shared->lf, lf))
HGOTO_DONE(curr->shared)
/* Advance to next shared file node */
curr = curr->next;
} /* end while */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_sfile_search() */
/*-------------------------------------------------------------------------
* Function: H5F_sfile_remove
*
* Purpose: Remove a "shared" file struct from the list of open files
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* Monday, July 18, 2005
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5F_sfile_remove(H5F_file_t *shared)
{
H5F_sfile_node_t *curr; /* Current shared file node */
H5F_sfile_node_t *last; /* Last shared file node */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5F_sfile_remove)
/* Sanity check */
HDassert(shared);
/* Locate shared file node with correct shared file */
last = NULL;
curr = H5F_sfile_head_g;
while(curr && curr->shared != shared) {
/* Advance to next node */
last = curr;
curr = curr->next;
} /* end while */
/* Indicate error if the node wasn't found */
if(curr == NULL)
HGOTO_ERROR(H5E_FILE, H5E_NOTFOUND, FAIL, "can't find shared file info")
/* Remove node found from list */
if(last != NULL)
/* Removing middle or tail node in list */
last->next = curr->next;
else
/* Removing head node in list */
H5F_sfile_head_g = curr->next;
/* Release the shared file node struct */
/* (the shared file info itself is freed elsewhere) */
curr = H5FL_FREE(H5F_sfile_node_t, curr);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F_sfile_remove() */
|
