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
|
/*
* Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
* $Sendmail: rpool.h,v 1.15 2001/09/04 22:41:55 ca Exp $
*/
/*
** libsm resource pools
** See libsm/rpool.html for documentation.
*/
#ifndef SM_RPOOL_H
# define SM_RPOOL_H
# include <sm/gen.h>
# include <sm/heap.h>
# include <sm/string.h>
/*
** Each memory pool object consists of an SM_POOLLINK_T,
** followed by a platform specific amount of padding,
** followed by 'poolsize' bytes of pool data,
** where 'poolsize' is the value of rpool->sm_poolsize at the time
** the pool is allocated.
*/
typedef struct sm_poollink SM_POOLLINK_T;
struct sm_poollink
{
SM_POOLLINK_T *sm_pnext;
};
typedef void (*SM_RPOOL_RFREE_T) __P((void *_rcontext));
typedef SM_RPOOL_RFREE_T *SM_RPOOL_ATTACH_T;
typedef struct sm_resource SM_RESOURCE_T;
struct sm_resource
{
/*
** Function for freeing this resource. It may be NULL,
** meaning that this resource has already been freed.
*/
SM_RPOOL_RFREE_T sm_rfree;
void *sm_rcontext; /* resource data */
};
# define SM_RLIST_MAX 511
typedef struct sm_rlist SM_RLIST_T;
struct sm_rlist
{
SM_RESOURCE_T sm_rvec[SM_RLIST_MAX];
SM_RLIST_T *sm_rnext;
};
typedef struct
{
/* Points to SmRpoolMagic, or is NULL if rpool is freed. */
const char *sm_magic;
/*
** If this rpool object has no parent, then sm_parentlink
** is NULL. Otherwise, we set *sm_parentlink = NULL
** when this rpool is freed, so that it isn't freed a
** second time when the parent is freed.
*/
SM_RPOOL_RFREE_T *sm_parentlink;
/*
** Memory pools
*/
/* Size of the next pool to be allocated, not including the header. */
size_t sm_poolsize;
/*
** If an sm_rpool_malloc_x request is too big to fit
** in the current pool, and the request size > bigobjectsize,
** then the object will be given its own malloc'ed block.
** sm_bigobjectsize <= sm_poolsize. The maximum wasted space
** at the end of a pool is maxpooledobjectsize - 1.
*/
size_t sm_bigobjectsize;
/* Points to next free byte in the current pool. */
char *sm_poolptr;
/*
** Number of bytes available in the current pool.
** Initially 0. Set to 0 by sm_rpool_free.
*/
size_t sm_poolavail;
/* Linked list of memory pools. Initially NULL. */
SM_POOLLINK_T *sm_pools;
/*
** Resource lists
*/
SM_RESOURCE_T *sm_rptr; /* Points to next free resource slot. */
/*
** Number of available resource slots in current list.
** Initially 0. Set to 0 by sm_rpool_free.
*/
size_t sm_ravail;
/* Linked list of resource lists. Initially NULL. */
SM_RLIST_T *sm_rlists;
#if _FFR_PERF_RPOOL
int sm_nbigblocks;
int sm_npools;
#endif /* _FFR_PERF_RPOOL */
} SM_RPOOL_T;
extern SM_RPOOL_T *
sm_rpool_new_x __P((
SM_RPOOL_T *_parent));
extern void
sm_rpool_free __P((
SM_RPOOL_T *_rpool));
# if SM_HEAP_CHECK
extern void *
sm_rpool_malloc_tagged_x __P((
SM_RPOOL_T *_rpool,
size_t _size,
char *_file,
int _line,
int _group));
# define sm_rpool_malloc_x(rpool, size) \
sm_rpool_malloc_tagged_x(rpool, size, __FILE__, __LINE__, SmHeapGroup)
extern void *
sm_rpool_malloc_tagged __P((
SM_RPOOL_T *_rpool,
size_t _size,
char *_file,
int _line,
int _group));
# define sm_rpool_malloc(rpool, size) \
sm_rpool_malloc_tagged(rpool, size, __FILE__, __LINE__, SmHeapGroup)
# else /* SM_HEAP_CHECK */
extern void *
sm_rpool_malloc_x __P((
SM_RPOOL_T *_rpool,
size_t _size));
extern void *
sm_rpool_malloc __P((
SM_RPOOL_T *_rpool,
size_t _size));
# endif /* SM_HEAP_CHECK */
# define sm_rpool_strdup_x(rpool, str) \
strcpy(sm_rpool_malloc_x(rpool, strlen(str) + 1), str)
extern SM_RPOOL_ATTACH_T
sm_rpool_attach_x __P((
SM_RPOOL_T *_rpool,
SM_RPOOL_RFREE_T _rfree,
void *_rcontext));
# define sm_rpool_detach(a) ((void)(*(a) = NULL))
extern void
sm_rpool_setsizes __P((
SM_RPOOL_T *_rpool,
size_t _poolsize,
size_t _bigobjectsize));
#endif /* ! SM_RPOOL_H */
|
