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Diffstat (limited to 'src/cache/ftccache.c')
| -rw-r--r-- | src/cache/ftccache.c | 592 |
1 files changed, 0 insertions, 592 deletions
diff --git a/src/cache/ftccache.c b/src/cache/ftccache.c deleted file mode 100644 index f3e699c..0000000 --- a/src/cache/ftccache.c +++ /dev/null @@ -1,592 +0,0 @@ -/***************************************************************************/ -/* */ -/* ftccache.c */ -/* */ -/* The FreeType internal cache interface (body). */ -/* */ -/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2007 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. */ -/* */ -/***************************************************************************/ - - -#include <ft2build.h> -#include "ftcmanag.h" -#include FT_INTERNAL_OBJECTS_H -#include FT_INTERNAL_DEBUG_H - -#include "ftccback.h" -#include "ftcerror.h" - - -#define FTC_HASH_MAX_LOAD 2 -#define FTC_HASH_MIN_LOAD 1 -#define FTC_HASH_SUB_LOAD ( FTC_HASH_MAX_LOAD - FTC_HASH_MIN_LOAD ) - -/* this one _must_ be a power of 2! */ -#define FTC_HASH_INITIAL_SIZE 8 - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** CACHE NODE DEFINITIONS *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - /* add a new node to the head of the manager's circular MRU list */ - static void - ftc_node_mru_link( FTC_Node node, - FTC_Manager manager ) - { - void *nl = &manager->nodes_list; - - - FTC_MruNode_Prepend( (FTC_MruNode*)nl, - (FTC_MruNode)node ); - manager->num_nodes++; - } - - - /* remove a node from the manager's MRU list */ - static void - ftc_node_mru_unlink( FTC_Node node, - FTC_Manager manager ) - { - void *nl = &manager->nodes_list; - - - FTC_MruNode_Remove( (FTC_MruNode*)nl, - (FTC_MruNode)node ); - manager->num_nodes--; - } - - -#ifndef FTC_INLINE - - /* move a node to the head of the manager's MRU list */ - static void - ftc_node_mru_up( FTC_Node node, - FTC_Manager manager ) - { - FTC_MruNode_Up( (FTC_MruNode*)&manager->nodes_list, - (FTC_MruNode)node ); - } - -#endif /* !FTC_INLINE */ - - - /* Note that this function cannot fail. If we cannot re-size the - * buckets array appropriately, we simply degrade the hash table's - * performance! - */ - static void - ftc_cache_resize( FTC_Cache cache ) - { - for (;;) - { - FTC_Node node, *pnode; - FT_UInt p = cache->p; - FT_UInt mask = cache->mask; - FT_UInt count = mask + p + 1; /* number of buckets */ - - - /* do we need to shrink the buckets array? */ - if ( cache->slack < 0 ) - { - FTC_Node new_list = NULL; - - - /* try to expand the buckets array _before_ splitting - * the bucket lists - */ - if ( p >= mask ) - { - FT_Memory memory = cache->memory; - FT_Error error; - - - /* if we can't expand the array, leave immediately */ - if ( FT_RENEW_ARRAY( cache->buckets, (mask+1)*2, (mask+1)*4 ) ) - break; - } - - /* split a single bucket */ - pnode = cache->buckets + p; - - for (;;) - { - node = *pnode; - if ( node == NULL ) - break; - - if ( node->hash & ( mask + 1 ) ) - { - *pnode = node->link; - node->link = new_list; - new_list = node; - } - else - pnode = &node->link; - } - - cache->buckets[p + mask + 1] = new_list; - - cache->slack += FTC_HASH_MAX_LOAD; - - if ( p >= mask ) - { - cache->mask = 2 * mask + 1; - cache->p = 0; - } - else - cache->p = p + 1; - } - - /* do we need to expand the buckets array? */ - else if ( cache->slack > (FT_Long)count * FTC_HASH_SUB_LOAD ) - { - FT_UInt old_index = p + mask; - FTC_Node* pold; - - - if ( old_index + 1 <= FTC_HASH_INITIAL_SIZE ) - break; - - if ( p == 0 ) - { - FT_Memory memory = cache->memory; - FT_Error error; - - - /* if we can't shrink the array, leave immediately */ - if ( FT_RENEW_ARRAY( cache->buckets, - ( mask + 1 ) * 2, mask + 1 ) ) - break; - - cache->mask >>= 1; - p = cache->mask; - } - else - p--; - - pnode = cache->buckets + p; - while ( *pnode ) - pnode = &(*pnode)->link; - - pold = cache->buckets + old_index; - *pnode = *pold; - *pold = NULL; - - cache->slack -= FTC_HASH_MAX_LOAD; - cache->p = p; - } - else /* the hash table is balanced */ - break; - } - } - - - /* remove a node from its cache's hash table */ - static void - ftc_node_hash_unlink( FTC_Node node0, - FTC_Cache cache ) - { - FTC_Node *pnode; - FT_UInt idx; - - - idx = (FT_UInt)( node0->hash & cache->mask ); - if ( idx < cache->p ) - idx = (FT_UInt)( node0->hash & ( 2 * cache->mask + 1 ) ); - - pnode = cache->buckets + idx; - - for (;;) - { - FTC_Node node = *pnode; - - - if ( node == NULL ) - { - FT_ERROR(( "ftc_node_hash_unlink: unknown node!\n" )); - return; - } - - if ( node == node0 ) - break; - - pnode = &(*pnode)->link; - } - - *pnode = node0->link; - node0->link = NULL; - - cache->slack++; - ftc_cache_resize( cache ); - } - - - /* add a node to the `top' of its cache's hash table */ - static void - ftc_node_hash_link( FTC_Node node, - FTC_Cache cache ) - { - FTC_Node *pnode; - FT_UInt idx; - - - idx = (FT_UInt)( node->hash & cache->mask ); - if ( idx < cache->p ) - idx = (FT_UInt)( node->hash & (2 * cache->mask + 1 ) ); - - pnode = cache->buckets + idx; - - node->link = *pnode; - *pnode = node; - - cache->slack--; - ftc_cache_resize( cache ); - } - - - /* remove a node from the cache manager */ -#ifdef FT_CONFIG_OPTION_OLD_INTERNALS - FT_BASE_DEF( void ) -#else - FT_LOCAL_DEF( void ) -#endif - ftc_node_destroy( FTC_Node node, - FTC_Manager manager ) - { - FTC_Cache cache; - - -#ifdef FT_DEBUG_ERROR - /* find node's cache */ - if ( node->cache_index >= manager->num_caches ) - { - FT_ERROR(( "ftc_node_destroy: invalid node handle\n" )); - return; - } -#endif - - cache = manager->caches[node->cache_index]; - -#ifdef FT_DEBUG_ERROR - if ( cache == NULL ) - { - FT_ERROR(( "ftc_node_destroy: invalid node handle\n" )); - return; - } -#endif - - manager->cur_weight -= cache->clazz.node_weight( node, cache ); - - /* remove node from mru list */ - ftc_node_mru_unlink( node, manager ); - - /* remove node from cache's hash table */ - ftc_node_hash_unlink( node, cache ); - - /* now finalize it */ - cache->clazz.node_free( node, cache ); - -#if 0 - /* check, just in case of general corruption :-) */ - if ( manager->num_nodes == 0 ) - FT_ERROR(( "ftc_node_destroy: invalid cache node count! = %d\n", - manager->num_nodes )); -#endif - } - - - /*************************************************************************/ - /*************************************************************************/ - /***** *****/ - /***** ABSTRACT CACHE CLASS *****/ - /***** *****/ - /*************************************************************************/ - /*************************************************************************/ - - - FT_LOCAL_DEF( FT_Error ) - FTC_Cache_Init( FTC_Cache cache ) - { - return ftc_cache_init( cache ); - } - - - FT_LOCAL_DEF( FT_Error ) - ftc_cache_init( FTC_Cache cache ) - { - FT_Memory memory = cache->memory; - FT_Error error; - - - cache->p = 0; - cache->mask = FTC_HASH_INITIAL_SIZE - 1; - cache->slack = FTC_HASH_INITIAL_SIZE * FTC_HASH_MAX_LOAD; - - (void)FT_NEW_ARRAY( cache->buckets, FTC_HASH_INITIAL_SIZE * 2 ); - return error; - } - - - static void - FTC_Cache_Clear( FTC_Cache cache ) - { - if ( cache ) - { - FTC_Manager manager = cache->manager; - FT_UFast i; - FT_UInt count; - - - count = cache->p + cache->mask + 1; - - for ( i = 0; i < count; i++ ) - { - FTC_Node *pnode = cache->buckets + i, next, node = *pnode; - - - while ( node ) - { - next = node->link; - node->link = NULL; - - /* remove node from mru list */ - ftc_node_mru_unlink( node, manager ); - - /* now finalize it */ - manager->cur_weight -= cache->clazz.node_weight( node, cache ); - - cache->clazz.node_free( node, cache ); - node = next; - } - cache->buckets[i] = NULL; - } - ftc_cache_resize( cache ); - } - } - - - FT_LOCAL_DEF( void ) - ftc_cache_done( FTC_Cache cache ) - { - if ( cache->memory ) - { - FT_Memory memory = cache->memory; - - - FTC_Cache_Clear( cache ); - - FT_FREE( cache->buckets ); - cache->mask = 0; - cache->p = 0; - cache->slack = 0; - - cache->memory = NULL; - } - } - - - FT_LOCAL_DEF( void ) - FTC_Cache_Done( FTC_Cache cache ) - { - ftc_cache_done( cache ); - } - - - static void - ftc_cache_add( FTC_Cache cache, - FT_UInt32 hash, - FTC_Node node ) - { - node->hash = hash; - node->cache_index = (FT_UInt16) cache->index; - node->ref_count = 0; - - ftc_node_hash_link( node, cache ); - ftc_node_mru_link( node, cache->manager ); - - { - FTC_Manager manager = cache->manager; - - - manager->cur_weight += cache->clazz.node_weight( node, cache ); - - if ( manager->cur_weight >= manager->max_weight ) - { - node->ref_count++; - FTC_Manager_Compress( manager ); - node->ref_count--; - } - } - } - - - FT_LOCAL_DEF( FT_Error ) - FTC_Cache_NewNode( FTC_Cache cache, - FT_UInt32 hash, - FT_Pointer query, - FTC_Node *anode ) - { - FT_Error error; - FTC_Node node; - - - /* - * We use the FTC_CACHE_TRYLOOP macros to support out-of-memory - * errors (OOM) correctly, i.e., by flushing the cache progressively - * in order to make more room. - */ - - FTC_CACHE_TRYLOOP( cache ) - { - error = cache->clazz.node_new( &node, query, cache ); - } - FTC_CACHE_TRYLOOP_END(); - - if ( error ) - node = NULL; - else - { - /* don't assume that the cache has the same number of buckets, since - * our allocation request might have triggered global cache flushing - */ - ftc_cache_add( cache, hash, node ); - } - - *anode = node; - return error; - } - - -#ifndef FTC_INLINE - - FT_LOCAL_DEF( FT_Error ) - FTC_Cache_Lookup( FTC_Cache cache, - FT_UInt32 hash, - FT_Pointer query, - FTC_Node *anode ) - { - FT_UFast idx; - FTC_Node* bucket; - FTC_Node* pnode; - FTC_Node node; - FT_Error error = 0; - - FTC_Node_CompareFunc compare = cache->clazz.node_compare; - - - if ( cache == NULL || anode == NULL ) - return FT_Err_Invalid_Argument; - - idx = hash & cache->mask; - if ( idx < cache->p ) - idx = hash & ( cache->mask * 2 + 1 ); - - bucket = cache->buckets + idx; - pnode = bucket; - for (;;) - { - node = *pnode; - if ( node == NULL ) - goto NewNode; - - if ( node->hash == hash && compare( node, query, cache ) ) - break; - - pnode = &node->link; - } - - if ( node != *bucket ) - { - *pnode = node->link; - node->link = *bucket; - *bucket = node; - } - - /* move to head of MRU list */ - { - FTC_Manager manager = cache->manager; - - - if ( node != manager->nodes_list ) - ftc_node_mru_up( node, manager ); - } - *anode = node; - return error; - - NewNode: - return FTC_Cache_NewNode( cache, hash, query, anode ); - } - -#endif /* !FTC_INLINE */ - - - FT_LOCAL_DEF( void ) - FTC_Cache_RemoveFaceID( FTC_Cache cache, - FTC_FaceID face_id ) - { - FT_UFast i, count; - FTC_Manager manager = cache->manager; - FTC_Node frees = NULL; - - - count = cache->p + cache->mask; - for ( i = 0; i < count; i++ ) - { - FTC_Node* bucket = cache->buckets + i; - FTC_Node* pnode = bucket; - - - for ( ;; ) - { - FTC_Node node = *pnode; - - - if ( node == NULL ) - break; - - if ( cache->clazz.node_remove_faceid( node, face_id, cache ) ) - { - *pnode = node->link; - node->link = frees; - frees = node; - } - else - pnode = &node->link; - } - } - - /* remove all nodes in the free list */ - while ( frees ) - { - FTC_Node node; - - - node = frees; - frees = node->link; - - manager->cur_weight -= cache->clazz.node_weight( node, cache ); - ftc_node_mru_unlink( node, manager ); - - cache->clazz.node_free( node, cache ); - - cache->slack++; - } - - ftc_cache_resize( cache ); - } - - -/* END */ |