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
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/*
+----------------------------------------------------------------------+
| Zend OPcache |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2018 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
| Stanislav Malyshev <stas@zend.com> |
| Dmitry Stogov <dmitry@zend.com> |
+----------------------------------------------------------------------+
*/
#include "ZendAccelerator.h"
#include "zend_accelerator_hash.h"
#include "zend_hash.h"
#include "zend_shared_alloc.h"
/* Generated on an Octa-ALPHA 300MHz CPU & 2.5GB RAM monster */
static uint32_t prime_numbers[] =
{5, 11, 19, 53, 107, 223, 463, 983, 1979, 3907, 7963, 16229, 32531, 65407, 130987, 262237, 524521, 1048793 };
static uint32_t num_prime_numbers = sizeof(prime_numbers) / sizeof(uint32_t);
void zend_accel_hash_clean(zend_accel_hash *accel_hash)
{
accel_hash->num_entries = 0;
accel_hash->num_direct_entries = 0;
memset(accel_hash->hash_table, 0, sizeof(zend_accel_hash_entry *)*accel_hash->max_num_entries);
}
void zend_accel_hash_init(zend_accel_hash *accel_hash, uint32_t hash_size)
{
uint32_t i;
for (i=0; i<num_prime_numbers; i++) {
if (hash_size <= prime_numbers[i]) {
hash_size = prime_numbers[i];
break;
}
}
accel_hash->num_entries = 0;
accel_hash->num_direct_entries = 0;
accel_hash->max_num_entries = hash_size;
/* set up hash pointers table */
accel_hash->hash_table = zend_shared_alloc(sizeof(zend_accel_hash_entry *)*accel_hash->max_num_entries);
if (!accel_hash->hash_table) {
zend_accel_error(ACCEL_LOG_FATAL, "Insufficient shared memory!");
return;
}
/* set up hash values table */
accel_hash->hash_entries = zend_shared_alloc(sizeof(zend_accel_hash_entry)*accel_hash->max_num_entries);
if (!accel_hash->hash_entries) {
zend_accel_error(ACCEL_LOG_FATAL, "Insufficient shared memory!");
return;
}
memset(accel_hash->hash_table, 0, sizeof(zend_accel_hash_entry *)*accel_hash->max_num_entries);
}
/* Returns NULL if hash is full
* Returns pointer the actual hash entry on success
* key needs to be already allocated as it is not copied
*/
zend_accel_hash_entry* zend_accel_hash_update(zend_accel_hash *accel_hash, const char *key, uint32_t key_length, zend_bool indirect, void *data)
{
zend_ulong hash_value;
zend_ulong index;
zend_accel_hash_entry *entry;
zend_accel_hash_entry *indirect_bucket = NULL;
if (indirect) {
indirect_bucket = (zend_accel_hash_entry*)data;
while (indirect_bucket->indirect) {
indirect_bucket = (zend_accel_hash_entry*)indirect_bucket->data;
}
}
hash_value = zend_inline_hash_func(key, key_length);
#ifndef ZEND_WIN32
hash_value ^= ZCG(root_hash);
#endif
index = hash_value % accel_hash->max_num_entries;
/* try to see if the element already exists in the hash */
entry = accel_hash->hash_table[index];
while (entry) {
if (entry->hash_value == hash_value
&& entry->key_length == key_length
&& !memcmp(entry->key, key, key_length)) {
if (entry->indirect) {
if (indirect_bucket) {
entry->data = indirect_bucket;
} else {
((zend_accel_hash_entry*)entry->data)->data = data;
}
} else {
if (indirect_bucket) {
accel_hash->num_direct_entries--;
entry->data = indirect_bucket;
entry->indirect = 1;
} else {
entry->data = data;
}
}
return entry;
}
entry = entry->next;
}
/* Does not exist, add a new entry */
if (accel_hash->num_entries == accel_hash->max_num_entries) {
return NULL;
}
entry = &accel_hash->hash_entries[accel_hash->num_entries++];
if (indirect) {
entry->data = indirect_bucket;
entry->indirect = 1;
} else {
accel_hash->num_direct_entries++;
entry->data = data;
entry->indirect = 0;
}
entry->hash_value = hash_value;
entry->key = key;
entry->key_length = key_length;
entry->next = accel_hash->hash_table[index];
accel_hash->hash_table[index] = entry;
return entry;
}
static zend_always_inline void* zend_accel_hash_find_ex(zend_accel_hash *accel_hash, const char *key, uint32_t key_length, zend_ulong hash_value, int data)
{
zend_ulong index;
zend_accel_hash_entry *entry;
#ifndef ZEND_WIN32
hash_value ^= ZCG(root_hash);
#endif
index = hash_value % accel_hash->max_num_entries;
entry = accel_hash->hash_table[index];
while (entry) {
if (entry->hash_value == hash_value
&& entry->key_length == key_length
&& !memcmp(entry->key, key, key_length)) {
if (entry->indirect) {
if (data) {
return ((zend_accel_hash_entry*)entry->data)->data;
} else {
return entry->data;
}
} else {
if (data) {
return entry->data;
} else {
return entry;
}
}
}
entry = entry->next;
}
return NULL;
}
/* Returns the data associated with key on success
* Returns NULL if data doesn't exist
*/
void* zend_accel_hash_find(zend_accel_hash *accel_hash, zend_string *key)
{
return zend_accel_hash_find_ex(
accel_hash,
ZSTR_VAL(key),
ZSTR_LEN(key),
zend_string_hash_val(key),
1);
}
/* Returns the hash entry associated with key on success
* Returns NULL if it doesn't exist
*/
zend_accel_hash_entry* zend_accel_hash_find_entry(zend_accel_hash *accel_hash, zend_string *key)
{
return (zend_accel_hash_entry *)zend_accel_hash_find_ex(
accel_hash,
ZSTR_VAL(key),
ZSTR_LEN(key),
zend_string_hash_val(key),
0);
}
/* Returns the data associated with key on success
* Returns NULL if data doesn't exist
*/
void* zend_accel_hash_str_find(zend_accel_hash *accel_hash, const char *key, uint32_t key_length)
{
return zend_accel_hash_find_ex(
accel_hash,
key,
key_length,
zend_inline_hash_func(key, key_length),
1);
}
/* Returns the hash entry associated with key on success
* Returns NULL if it doesn't exist
*/
zend_accel_hash_entry* zend_accel_hash_str_find_entry(zend_accel_hash *accel_hash, const char *key, uint32_t key_length)
{
return (zend_accel_hash_entry *)zend_accel_hash_find_ex(
accel_hash,
key,
key_length,
zend_inline_hash_func(key, key_length),
0);
}
int zend_accel_hash_unlink(zend_accel_hash *accel_hash, const char *key, uint32_t key_length)
{
zend_ulong hash_value;
zend_ulong index;
zend_accel_hash_entry *entry, *last_entry=NULL;
hash_value = zend_inline_hash_func(key, key_length);
#ifndef ZEND_WIN32
hash_value ^= ZCG(root_hash);
#endif
index = hash_value % accel_hash->max_num_entries;
entry = accel_hash->hash_table[index];
while (entry) {
if (entry->hash_value == hash_value
&& entry->key_length == key_length
&& !memcmp(entry->key, key, key_length)) {
if (!entry->indirect) {
accel_hash->num_direct_entries--;
}
if (last_entry) {
last_entry->next = entry->next;
} else {
accel_hash->hash_table[index] = entry->next;
}
return SUCCESS;
}
last_entry = entry;
entry = entry->next;
}
return FAILURE;
}
|
