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Diffstat (limited to 'Build/source/libs/gd/gd-2.0.35/gdcache.h')
-rw-r--r-- | Build/source/libs/gd/gd-2.0.35/gdcache.h | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/Build/source/libs/gd/gd-2.0.35/gdcache.h b/Build/source/libs/gd/gd-2.0.35/gdcache.h deleted file mode 100644 index 590c8d90dc8..00000000000 --- a/Build/source/libs/gd/gd-2.0.35/gdcache.h +++ /dev/null @@ -1,93 +0,0 @@ -#ifdef __cplusplus -extern "C" { -#endif - -/* - * gdcache.h - * - * 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@graphviz.org) 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 */ -/*********************************************************/ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <stdlib.h> -#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); - -#ifdef __cplusplus -} -#endif |