kc3-lang/freetype/src/cache/ftlru.h

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• Hash : 3b2c50eb
  Author :
  Date : 2000-08-23T21:11:13
  

  completing the FreeType Cache subsystem files

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• src/cache/ftlru.h

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

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