mirror of
https://github.com/php/php-src.git
synced 2024-11-28 20:34:29 +08:00
341 lines
6.4 KiB
C
341 lines
6.4 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| PHP version 4.0 |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1997, 1998, 1999, 2000 The PHP Group |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 2.01 of the PHP license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available at through the world-wide-web at |
|
|
| http://www.php.net/license/2_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: Sascha Schumann <ss@2ns.de> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
|
|
#include "php.h"
|
|
|
|
#ifdef HAVE_LIBMM
|
|
|
|
#include <mm.h>
|
|
#include <time.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "php_session.h"
|
|
#include "mod_mm.h"
|
|
|
|
#define PS_MM_PATH "/tmp/session_mm"
|
|
|
|
/*
|
|
* this list holds all data associated with one session
|
|
*/
|
|
|
|
typedef struct ps_sd {
|
|
struct ps_sd *next, *prev;
|
|
time_t ctime;
|
|
char *key;
|
|
void *data;
|
|
size_t datalen;
|
|
} ps_sd;
|
|
|
|
typedef struct {
|
|
MM *mm;
|
|
ps_sd **hash;
|
|
} ps_mm;
|
|
|
|
static ps_mm *ps_mm_instance = NULL;
|
|
|
|
/* should be a prime */
|
|
#define HASH_SIZE 577
|
|
|
|
#if 0
|
|
#define ps_mm_debug(a...) fprintf(stderr, a)
|
|
#else
|
|
#define ps_mm_debug(a...)
|
|
#endif
|
|
|
|
#define BITS_IN_int (sizeof(int) * CHAR_BIT)
|
|
#define THREE_QUARTERS ((int) ((BITS_IN_int * 3) / 4))
|
|
#define ONE_EIGTH ((int) (BITS_IN_int / 8))
|
|
#define HIGH_BITS (~((unsigned int)(~0) >> ONE_EIGTH))
|
|
|
|
/*
|
|
* Weinberger's generic hash algorithm, adapted by Holub
|
|
* (published in [Holub 1990])
|
|
*/
|
|
|
|
static unsigned int ps_sd_hash(const char *data)
|
|
{
|
|
unsigned int val, i;
|
|
|
|
for (val = 0; *data; data++) {
|
|
val = (val << ONE_EIGTH) + *data;
|
|
if ((i = val & HIGH_BITS) != 0)
|
|
val = (val ^ (i >> THREE_QUARTERS)) & -HIGH_BITS;
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
|
|
static ps_sd *ps_sd_new(ps_mm *data, const char *key, const void *sdata, size_t sdatalen)
|
|
{
|
|
unsigned int h;
|
|
ps_sd *sd;
|
|
|
|
h = ps_sd_hash(key) % HASH_SIZE;
|
|
|
|
sd = mm_malloc(data->mm, sizeof(*sd));
|
|
if (!sd)
|
|
return NULL;
|
|
sd->ctime = 0;
|
|
|
|
sd->data = mm_malloc(data->mm, sdatalen);
|
|
if (!sd->data) {
|
|
mm_free(data->mm, sd);
|
|
return NULL;
|
|
}
|
|
|
|
sd->datalen = sdatalen;
|
|
|
|
sd->key = mm_strdup(data->mm, key);
|
|
if (!sd->key) {
|
|
mm_free(data->mm, sd->data);
|
|
mm_free(data->mm, sd);
|
|
return NULL;
|
|
}
|
|
|
|
memcpy(sd->data, sdata, sdatalen);
|
|
|
|
if ((sd->next = data->hash[h]))
|
|
sd->next->prev = sd;
|
|
sd->prev = NULL;
|
|
|
|
ps_mm_debug("inserting %s(%x) into %d\n", key, sd, h);
|
|
|
|
data->hash[h] = sd;
|
|
|
|
return sd;
|
|
}
|
|
|
|
static void ps_sd_destroy(ps_mm *data, ps_sd *sd)
|
|
{
|
|
unsigned int h;
|
|
|
|
h = ps_sd_hash(sd->key) % HASH_SIZE;
|
|
|
|
if (sd->next)
|
|
sd->next->prev = sd->prev;
|
|
if (sd->prev)
|
|
sd->prev->next = sd->next;
|
|
|
|
if (data->hash[h] == sd)
|
|
data->hash[h] = sd->next;
|
|
|
|
mm_free(data->mm, sd->key);
|
|
if (sd->data)
|
|
mm_free(data->mm, sd->data);
|
|
mm_free(data->mm, sd);
|
|
}
|
|
|
|
static ps_sd *ps_sd_lookup(ps_mm *data, const char *key, int rw)
|
|
{
|
|
unsigned int h;
|
|
ps_sd *ret;
|
|
|
|
h = ps_sd_hash(key) % HASH_SIZE;
|
|
|
|
for (ret = data->hash[h]; ret; ret = ret->next)
|
|
if (!strcmp(ret->key, key))
|
|
break;
|
|
|
|
if (ret && rw && ret != data->hash[h]) {
|
|
data->hash[h]->prev = ret;
|
|
ret->next = data->hash[h];
|
|
data->hash[h] = ret;
|
|
ps_mm_debug("optimizing\n");
|
|
}
|
|
|
|
ps_mm_debug(stderr, "lookup(%s): ret=%x,h=%d\n", key, ret, h);
|
|
|
|
return ret;
|
|
}
|
|
|
|
ps_module ps_mod_mm = {
|
|
PS_MOD(mm)
|
|
};
|
|
|
|
#define PS_MM_DATA ps_mm *data = PS_GET_MOD_DATA()
|
|
|
|
static int ps_mm_initialize(ps_mm *data, const char *path)
|
|
{
|
|
data->mm = mm_create(0, path);
|
|
|
|
data->hash = mm_calloc(data->mm, HASH_SIZE, sizeof(*data->hash));
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
static void ps_mm_destroy(ps_mm *data)
|
|
{
|
|
int h;
|
|
ps_sd *sd, *next;
|
|
|
|
for (h = 0; h < HASH_SIZE; h++)
|
|
for (sd = data->hash[h]; sd; sd = next) {
|
|
next = sd->next;
|
|
ps_sd_destroy(data, sd);
|
|
}
|
|
|
|
mm_free(data->mm, data->hash);
|
|
mm_destroy(data->mm);
|
|
}
|
|
|
|
PHP_GINIT_FUNCTION(ps_mm)
|
|
{
|
|
ps_mm_instance = calloc(sizeof(*ps_mm_instance), 1);
|
|
ps_mm_initialize(ps_mm_instance, PS_MM_PATH);
|
|
return SUCCESS;
|
|
}
|
|
|
|
PHP_GSHUTDOWN_FUNCTION(ps_mm)
|
|
{
|
|
ps_mm_destroy(ps_mm_instance);
|
|
free(ps_mm_instance);
|
|
return SUCCESS;
|
|
}
|
|
|
|
PS_OPEN_FUNC(mm)
|
|
{
|
|
ps_mm_debug("open: ps_mm_instance=%x\n", ps_mm_instance);
|
|
|
|
if (!ps_mm_instance)
|
|
return FAILURE;
|
|
|
|
PS_SET_MOD_DATA(ps_mm_instance);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
PS_CLOSE_FUNC(mm)
|
|
{
|
|
PS_SET_MOD_DATA(NULL);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
PS_READ_FUNC(mm)
|
|
{
|
|
PS_MM_DATA;
|
|
ps_sd *sd;
|
|
int ret = FAILURE;
|
|
|
|
mm_lock(data->mm, MM_LOCK_RD);
|
|
|
|
sd = ps_sd_lookup(data, key, 0);
|
|
if (sd) {
|
|
*vallen = sd->datalen;
|
|
*val = emalloc(sd->datalen);
|
|
memcpy(*val, sd->data, sd->datalen);
|
|
ret = SUCCESS;
|
|
}
|
|
|
|
mm_unlock(data->mm);
|
|
|
|
return ret;
|
|
}
|
|
|
|
PS_WRITE_FUNC(mm)
|
|
{
|
|
PS_MM_DATA;
|
|
ps_sd *sd;
|
|
|
|
mm_lock(data->mm, MM_LOCK_RW);
|
|
|
|
sd = ps_sd_lookup(data, key, 1);
|
|
if (!sd) {
|
|
sd = ps_sd_new(data, key, val, vallen);
|
|
ps_mm_debug(stderr, "new one for %s\n", key);
|
|
} else {
|
|
ps_mm_debug(stderr, "found existing one for %s\n", key);
|
|
mm_free(data->mm, sd->data);
|
|
sd->datalen = vallen;
|
|
sd->data = mm_malloc(data->mm, vallen);
|
|
if (!sd->data) {
|
|
ps_sd_destroy(data, sd);
|
|
sd = NULL;
|
|
} else
|
|
memcpy(sd->data, val, vallen);
|
|
}
|
|
|
|
if (sd)
|
|
time(&sd->ctime);
|
|
|
|
mm_unlock(data->mm);
|
|
|
|
return sd ? SUCCESS : FAILURE;
|
|
}
|
|
|
|
PS_DESTROY_FUNC(mm)
|
|
{
|
|
PS_MM_DATA;
|
|
ps_sd *sd;
|
|
|
|
mm_lock(data->mm, MM_LOCK_RW);
|
|
|
|
sd = ps_sd_lookup(data, key, 0);
|
|
if (sd)
|
|
ps_sd_destroy(data, sd);
|
|
|
|
mm_unlock(data->mm);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
PS_GC_FUNC(mm)
|
|
{
|
|
PS_MM_DATA;
|
|
int h;
|
|
time_t now;
|
|
ps_sd *sd, *next;
|
|
|
|
*nrdels = 0;
|
|
ps_mm_debug("gc\n");
|
|
|
|
mm_lock(data->mm, MM_LOCK_RW);
|
|
|
|
time(&now);
|
|
|
|
for (h = 0; h < HASH_SIZE; h++)
|
|
for (sd = data->hash[h]; sd; sd = next) {
|
|
next = sd->next;
|
|
ps_mm_debug("looking at %s\n", sd->key);
|
|
if ((now - sd->ctime) > maxlifetime) {
|
|
ps_sd_destroy(data, sd);
|
|
*nrdels++;
|
|
}
|
|
}
|
|
|
|
mm_unlock(data->mm);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
zend_module_entry php_session_mm_module = {
|
|
"Session MM",
|
|
NULL,
|
|
NULL, NULL,
|
|
NULL, NULL,
|
|
NULL,
|
|
PHP_GINIT(ps_mm), PHP_GSHUTDOWN(ps_mm),
|
|
STANDARD_MODULE_PROPERTIES_EX
|
|
};
|
|
|
|
#endif
|