| Server IP : 88.222.222.157 / Your IP : 216.73.217.26 Web Server : LiteSpeed System : Linux id-dci-web1986.main-hosting.eu 5.14.0-611.26.1.el9_7.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Jan 29 05:24:47 EST 2026 x86_64 User : u686484674 ( 686484674) PHP Version : 8.0.30 Disable Function : system, exec, shell_exec, passthru, mysql_list_dbs, ini_alter, dl, symlink, link, chgrp, leak, popen, apache_child_terminate, virtual, mb_send_mail MySQL : OFF | cURL : ON | WGET : ON | Perl : OFF | Python : OFF | Sudo : OFF | Pkexec : OFF Directory : /proc/self/root/proc/self/root/opt/cloudlinux/alt-php52/root/usr/include/php/ext/gd/ |
Upload File : |
/*
* $Id: gdcache.h 147409 2003-12-28 21:08:46Z iliaa $
*
* Caches of pointers to user structs in which the least-recently-used
* element is replaced in the event of a cache miss after the cache has
* reached a given size.
*
* John Ellson (ellson@lucent.com) Oct 31, 1997
*
* Test this with:
* gcc -o gdcache -g -Wall -DTEST gdcache.c
*
* The cache is implemented by a singly-linked list of elements
* each containing a pointer to a user struct that is being managed by
* the cache.
*
* The head structure has a pointer to the most-recently-used
* element, and elements are moved to this position in the list each
* time they are used. The head also contains pointers to three
* user defined functions:
* - a function to test if a cached userdata matches some keydata
* - a function to provide a new userdata struct to the cache
* if there has been a cache miss.
* - a function to release a userdata struct when it is
* no longer being managed by the cache
*
* In the event of a cache miss the cache is allowed to grow up to
* a specified maximum size. After the maximum size is reached then
* the least-recently-used element is discarded to make room for the
* new. The most-recently-returned value is always left at the
* beginning of the list after retrieval.
*
* In the current implementation the cache is traversed by a linear
* search from most-recent to least-recent. This linear search
* probably limits the usefulness of this implementation to cache
* sizes of a few tens of elements.
*/
/*********************************************************/
/* header */
/*********************************************************/
#if (!defined(_OSD_POSIX) && !defined(__FreeBSD__)) && HAVE_MALLOC_H
#include <malloc.h>
#else
#include <stdlib.h> /* BS2000/OSD defines malloc() & friends in stdlib.h */
#endif
#ifndef NULL
#define NULL (void *)0
#endif
/* user defined function templates */
typedef int (*gdCacheTestFn_t)(void *userdata, void *keydata);
typedef void *(*gdCacheFetchFn_t)(char **error, void *keydata);
typedef void (*gdCacheReleaseFn_t)(void *userdata);
/* element structure */
typedef struct gdCache_element_s gdCache_element_t;
struct gdCache_element_s {
gdCache_element_t *next;
void *userdata;
};
/* head structure */
typedef struct gdCache_head_s gdCache_head_t;
struct gdCache_head_s {
gdCache_element_t *mru;
int size;
char *error;
gdCacheTestFn_t gdCacheTest;
gdCacheFetchFn_t gdCacheFetch;
gdCacheReleaseFn_t gdCacheRelease;
};
/* function templates */
gdCache_head_t *
gdCacheCreate(
int size,
gdCacheTestFn_t gdCacheTest,
gdCacheFetchFn_t gdCacheFetch,
gdCacheReleaseFn_t gdCacheRelease );
void
gdCacheDelete( gdCache_head_t *head );
void *
gdCacheGet( gdCache_head_t *head, void *keydata );