121 lines
4.1 KiB
C
121 lines
4.1 KiB
C
/***************************************************************************/
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/* */
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/* ftlru.h */
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/* */
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/* Simple LRU list-cache (specification). */
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/* */
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/* Copyright 2000 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#ifndef FTLRU_H
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#define FTLRU_H
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#include <freetype/freetype.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef FT_Pointer FT_LruKey;
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typedef struct FT_LruNodeRec_
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{
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FT_ListNodeRec root;
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FT_LruKey key;
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} FT_LruNodeRec, *FT_LruNode;
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typedef struct FT_LruRec_* FT_Lru;
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typedef struct FT_Lru_Class_
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{
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FT_UInt lru_size; /* object size in bytes */
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FT_Error (*init_element)( FT_Lru lru,
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FT_LruNode node );
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void (*done_element)( FT_Lru lru,
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FT_LruNode node );
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FT_Error (*flush_element)( FT_Lru lru,
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FT_LruNode node,
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FT_LruKey new_key );
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FT_Bool (*compare_element)( FT_LruNode node,
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FT_LruKey key );
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} FT_Lru_Class;
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typedef FT_Bool (*FT_Lru_Selector)( FT_Lru lru,
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FT_LruNode node,
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FT_Pointer data );
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typedef struct FT_LruRec_
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{
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FT_Lru_Class* clazz;
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FT_UInt max_elements;
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FT_UInt num_elements;
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FT_ListRec elements;
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FT_Memory memory;
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FT_Pointer user_data;
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/* the following fields are only meaningful for static lru containers */
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FT_ListRec free_nodes;
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FT_LruNode nodes;
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} FT_LruRec;
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FT_EXPORT_DEF( FT_Error ) FT_Lru_New( const FT_Lru_Class* clazz,
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FT_UInt max_elements,
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FT_Pointer user_data,
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FT_Memory memory,
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FT_Bool pre_alloc,
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FT_Lru* alru );
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FT_EXPORT_DEF( void ) FT_Lru_Reset( FT_Lru lru );
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FT_EXPORT_DEF( void ) FT_Lru_Done( FT_Lru lru );
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FT_EXPORT_DEF( FT_Error ) FT_Lru_Lookup_Node( FT_Lru lru,
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FT_LruKey key,
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FT_LruNode* anode );
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FT_EXPORT_DEF( FT_Error ) FT_Lru_Lookup( FT_Lru lru,
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FT_LruKey key,
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FT_Pointer* aobject );
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FT_EXPORT_DEF( void ) FT_Lru_Remove_Node( FT_Lru lru,
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FT_LruNode node );
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FT_EXPORT_DEF( void ) FT_Lru_Remove_Selection( FT_Lru lru,
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FT_Lru_Selector selector,
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FT_Pointer data );
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#ifdef __cplusplus
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}
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#endif
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#endif /* FTLRU_H */
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/* END */
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