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
|
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apr_general.h"
#include "apr_shm.h"
#include "apr_errno.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include <stdio.h>
#include <stdlib.h>
#include <kernel/OS.h>
#include "apr_portable.h"
struct apr_shm_t {
apr_pool_t *pool;
void *memblock;
void *ptr;
apr_size_t reqsize;
apr_size_t avail;
area_id aid;
};
APR_DECLARE(apr_status_t) apr_shm_create(apr_shm_t **m,
apr_size_t reqsize,
const char *file,
apr_pool_t *p)
{
apr_size_t pagesize;
area_id newid;
char *addr;
(*m) = (apr_shm_t *)apr_pcalloc(p, sizeof(apr_shm_t));
/* we MUST allocate in pages, so calculate how big an area we need... */
pagesize = ((reqsize + B_PAGE_SIZE - 1) / B_PAGE_SIZE) * B_PAGE_SIZE;
newid = create_area("apr_shmem", (void*)&addr, B_ANY_ADDRESS,
pagesize, B_CONTIGUOUS, B_READ_AREA|B_WRITE_AREA);
if (newid < 0)
return errno;
(*m)->pool = p;
(*m)->aid = newid;
(*m)->memblock = addr;
(*m)->ptr = (void*)addr;
(*m)->avail = pagesize; /* record how big an area we actually created... */
(*m)->reqsize = reqsize;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_destroy(apr_shm_t *m)
{
delete_area(m->aid);
m->avail = 0;
m->memblock = NULL;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_attach(apr_shm_t **m,
const char *filename,
apr_pool_t *pool)
{
area_info ai;
thread_info ti;
area_id deleteme;
apr_shm_t *new_m;
deleteme = find_area(filename);
if (deleteme == B_NAME_NOT_FOUND)
return APR_EINVAL;
new_m = (apr_shm_t*)apr_palloc(pool, sizeof(apr_shm_t*));
if (new_m == NULL)
return APR_ENOMEM;
new_m->pool = pool;
get_area_info(deleteme, &ai);
get_thread_info(find_thread(NULL), &ti);
if (ti.team != ai.team) {
area_id narea;
narea = clone_area(ai.name, &(ai.address), B_CLONE_ADDRESS,
B_READ_AREA|B_WRITE_AREA, ai.area);
if (narea < B_OK)
return narea;
get_area_info(narea, &ai);
new_m->aid = narea;
new_m->memblock = ai.address;
new_m->ptr = (void*)ai.address;
new_m->avail = ai.size;
new_m->reqsize = ai.size;
}
(*m) = new_m;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_detach(apr_shm_t *m)
{
delete_area(m->aid);
return APR_SUCCESS;
}
APR_DECLARE(void *) apr_shm_baseaddr_get(const apr_shm_t *m)
{
return m->memblock;
}
APR_DECLARE(apr_size_t) apr_shm_size_get(const apr_shm_t *m)
{
return m->reqsize;
}
APR_POOL_IMPLEMENT_ACCESSOR(shm)
APR_DECLARE(apr_status_t) apr_os_shm_get(apr_os_shm_t *osshm,
apr_shm_t *shm)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_os_shm_put(apr_shm_t **m,
apr_os_shm_t *osshm,
apr_pool_t *pool)
{
return APR_ENOTIMPL;
}
|
