Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: php-5.4.13
Fetching contributors…

Cannot retrieve contributors at this time

file 233 lines (194 sloc) 6.998 kb
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
/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2013 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend 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.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Dmitry Stogov <dmitry@zend.com> |
+----------------------------------------------------------------------+
*/

/* $Id: $ */

#include "zend.h"
#include "zend_globals.h"

#ifndef ZEND_DEBUG_INTERNED_STRINGS
# define ZEND_DEBUG_INTERNED_STRINGS 0
#endif

#if ZEND_DEBUG_INTERNED_STRINGS
# include <sys/mman.h>
#endif

ZEND_API const char *(*zend_new_interned_string)(const char *str, int len, int free_src TSRMLS_DC);
ZEND_API void (*zend_interned_strings_snapshot)(TSRMLS_D);
ZEND_API void (*zend_interned_strings_restore)(TSRMLS_D);

static const char *zend_new_interned_string_int(const char *str, int len, int free_src TSRMLS_DC);
static void zend_interned_strings_snapshot_int(TSRMLS_D);
static void zend_interned_strings_restore_int(TSRMLS_D);

void zend_interned_strings_init(TSRMLS_D)
{
#ifndef ZTS
size_t size = 1024 * 1024;

#if ZEND_DEBUG_INTERNED_STRINGS
CG(interned_strings_start) = valloc(size);
#else
CG(interned_strings_start) = malloc(size);
#endif

CG(interned_strings_top) = CG(interned_strings_start);
CG(interned_strings_snapshot_top) = CG(interned_strings_start);
CG(interned_strings_end) = CG(interned_strings_start) + size;

zend_hash_init(&CG(interned_strings), 0, NULL, NULL, 1);

CG(interned_strings).nTableMask = CG(interned_strings).nTableSize - 1;
CG(interned_strings).arBuckets = (Bucket **) pecalloc(CG(interned_strings).nTableSize, sizeof(Bucket *), CG(interned_strings).persistent);

#if ZEND_DEBUG_INTERNED_STRINGS
mprotect(CG(interned_strings_start), CG(interned_strings_end) - CG(interned_strings_start), PROT_READ);
#endif

#endif

zend_new_interned_string = zend_new_interned_string_int;
zend_interned_strings_snapshot = zend_interned_strings_snapshot_int;
zend_interned_strings_restore = zend_interned_strings_restore_int;
}

void zend_interned_strings_dtor(TSRMLS_D)
{
#ifndef ZTS
#if ZEND_DEBUG_INTERNED_STRINGS
mprotect(CG(interned_strings_start), CG(interned_strings_end) - CG(interned_strings_start), PROT_WRITE | PROT_READ);
#endif
free(CG(interned_strings).arBuckets);
free(CG(interned_strings_start));
#endif
}

static const char *zend_new_interned_string_int(const char *arKey, int nKeyLength, int free_src TSRMLS_DC)
{
#ifndef ZTS
ulong h;
uint nIndex;
Bucket *p;

if (IS_INTERNED(arKey)) {
return arKey;
}

h = zend_inline_hash_func(arKey, nKeyLength);
nIndex = h & CG(interned_strings).nTableMask;
p = CG(interned_strings).arBuckets[nIndex];
while (p != NULL) {
if ((p->h == h) && (p->nKeyLength == nKeyLength)) {
if (!memcmp(p->arKey, arKey, nKeyLength)) {
if (free_src) {
efree((void *)arKey);
}
return p->arKey;
}
}
p = p->pNext;
}

if (CG(interned_strings_top) + ZEND_MM_ALIGNED_SIZE(sizeof(Bucket) + nKeyLength) >=
CG(interned_strings_end)) {
/* no memory */
return arKey;
}

p = (Bucket *) CG(interned_strings_top);
CG(interned_strings_top) += ZEND_MM_ALIGNED_SIZE(sizeof(Bucket) + nKeyLength);

#if ZEND_DEBUG_INTERNED_STRINGS
mprotect(CG(interned_strings_start), CG(interned_strings_end) - CG(interned_strings_start), PROT_READ | PROT_WRITE);
#endif

p->arKey = (char*)(p+1);
memcpy((char*)p->arKey, arKey, nKeyLength);
if (free_src) {
efree((void *)arKey);
}
p->nKeyLength = nKeyLength;
p->h = h;
p->pData = &p->pDataPtr;
p->pDataPtr = p;

p->pNext = CG(interned_strings).arBuckets[nIndex];
p->pLast = NULL;
if (p->pNext) {
p->pNext->pLast = p;
}

HANDLE_BLOCK_INTERRUPTIONS();

p->pListLast = CG(interned_strings).pListTail;
CG(interned_strings).pListTail = p;
p->pListNext = NULL;
if (p->pListLast != NULL) {
p->pListLast->pListNext = p;
}
if (!CG(interned_strings).pListHead) {
CG(interned_strings).pListHead = p;
}

CG(interned_strings).arBuckets[nIndex] = p;

HANDLE_UNBLOCK_INTERRUPTIONS();

CG(interned_strings).nNumOfElements++;

if (CG(interned_strings).nNumOfElements > CG(interned_strings).nTableSize) {
if ((CG(interned_strings).nTableSize << 1) > 0) { /* Let's double the table size */
Bucket **t = (Bucket **) perealloc_recoverable(CG(interned_strings).arBuckets, (CG(interned_strings).nTableSize << 1) * sizeof(Bucket *), CG(interned_strings).persistent);

if (t) {
HANDLE_BLOCK_INTERRUPTIONS();
CG(interned_strings).arBuckets = t;
CG(interned_strings).nTableSize = (CG(interned_strings).nTableSize << 1);
CG(interned_strings).nTableMask = CG(interned_strings).nTableSize - 1;
zend_hash_rehash(&CG(interned_strings));
HANDLE_UNBLOCK_INTERRUPTIONS();
}
}
}

#if ZEND_DEBUG_INTERNED_STRINGS
mprotect(CG(interned_strings_start), CG(interned_strings_end) - CG(interned_strings_start), PROT_READ);
#endif

return p->arKey;
#else
return arKey;
#endif
}

static void zend_interned_strings_snapshot_int(TSRMLS_D)
{
CG(interned_strings_snapshot_top) = CG(interned_strings_top);
}

static void zend_interned_strings_restore_int(TSRMLS_D)
{
#ifndef ZTS
Bucket *p;
int i;
#endif

CG(interned_strings_top) = CG(interned_strings_snapshot_top);

#ifndef ZTS
#if ZEND_DEBUG_INTERNED_STRINGS
mprotect(CG(interned_strings_start), CG(interned_strings_end) - CG(interned_strings_start), PROT_WRITE | PROT_READ);
#endif

for (i = 0; i < CG(interned_strings).nTableSize; i++) {
p = CG(interned_strings).arBuckets[i];
while (p && p->arKey > CG(interned_strings_top)) {
CG(interned_strings).nNumOfElements--;
if (p->pListLast != NULL) {
p->pListLast->pListNext = p->pListNext;
} else {
CG(interned_strings).pListHead = p->pListNext;
}
if (p->pListNext != NULL) {
p->pListNext->pListLast = p->pListLast;
} else {
CG(interned_strings).pListTail = p->pListLast;
}
p = p->pNext;
}
if (p) {
p->pLast = NULL;
}
CG(interned_strings).arBuckets[i] = p;
}

#if ZEND_DEBUG_INTERNED_STRINGS
mprotect(CG(interned_strings_start), CG(interned_strings_end) - CG(interned_strings_start), PROT_READ);
#endif
#endif
}

/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
Something went wrong with that request. Please try again.