diff options
Diffstat (limited to 'nx-X11/lib/font/fontcache/fontcache.c')
| -rw-r--r-- | nx-X11/lib/font/fontcache/fontcache.c | 1022 |
1 files changed, 0 insertions, 1022 deletions
diff --git a/nx-X11/lib/font/fontcache/fontcache.c b/nx-X11/lib/font/fontcache/fontcache.c deleted file mode 100644 index 40cfd63c2..000000000 --- a/nx-X11/lib/font/fontcache/fontcache.c +++ /dev/null @@ -1,1022 +0,0 @@ -/*- - * Copyright (c) 1998-1999 Shunsuke Akiyama <akiyama@jp.FreeBSD.org>. - * All rights reserved. - * Copyright (c) 1998-1999 X-TrueType Server Project, All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * Id: fontcache.c,v 1.19 1999/01/31 13:06:00 akiyama Exp $ - */ -/* $XFree86: xc/lib/font/fontcache/fontcache.c,v 1.4 2001/04/05 17:42:28 dawes Exp $ */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "fontcache.h" - -#define LOW_MARK 0 -#define HI_MARK 1 - -#define PURGE_ENTRY 1 -#define PURGE_BITMAP 2 - -typedef struct { - long hiMark; /* Cache hi water mark */ - long lowMark; /* Cache low water mark */ - long allocated; /* Cache allocated size */ - long used; /* Cache used size */ -} FontCacheSize_t; - -static int CacheInitialized = 0; - -static TAILQ_HEAD(FcInUseQueue, cache_entry) InUseQueueHead, *InUseQueue; -static TAILQ_HEAD(FcFreeQueue, cache_entry) FreeQueueHead, *FreeQueue; -static FCBCB FreeBitmapHead, *FreeBitmap; - -static long CacheHiMark; -static long CacheLowMark; -static int CacheBalance; -static FontCacheSize_t HashSize; -static FontCacheSize_t AllocSize; -static int NeedPurgeCache; -static FontCacheStatistics CacheStatistics; - -static void fc_assign_cache(void); -static int fc_assign_entry(void); -static void fc_flush_cache(void); -static int fc_get_bitmap_area(FontCacheEntryPtr, int); -static void fc_free_bitmap_area(FontCacheBitmapPtr); -static int fc_check_size(int); -static void fc_purge_cache(void); -static void fc_purge_bitmap(void); -static void fc_flush_cache_bitmap(void); -static void fc_flush_cache_inuse(void); -static void fc_flush_cache_free(void); -static void fc_purge_cache_entry(void); -static void fc_purge_cache_entry_pool(void); -static void fc_purge_bitmap_pool(void); - - -/* - * FontCacheInitialize() - * - * Initialize cache work area. - */ - -int -FontCacheInitialize() -{ -#ifdef FONTCACHE - int i; - - if (!CacheInitialized) { - /* - * first time initialization - */ -#if defined(HASH_DEBUG) || defined(DEBUG) - fprintf(stderr, "FontCacheInitialize: initializing cache\n"); -#endif - InUseQueue = &InUseQueueHead; - TAILQ_INIT(InUseQueue); - - FreeQueue = &FreeQueueHead; - TAILQ_INIT(FreeQueue); - - FreeBitmap = &FreeBitmapHead; - FreeBitmap->index = 0; - for (i = 0; i < FC_MEM_HASH_SIZE; i++) { - TAILQ_INIT(&FreeBitmap->head[i]); - } - - CacheHiMark = FC_DEFAULT_CACHE_SIZE * 1024; /* temporary */ - CacheLowMark = (CacheHiMark / 4) * 3; - CacheBalance = FC_CACHE_BALANCE; - - NeedPurgeCache = 0; - - HashSize.allocated = HashSize.used = 0; - AllocSize.allocated = AllocSize.used = 0; - fc_assign_cache(); - fc_assign_entry(); -#if defined(DEBUG) - fprintf(stderr, "FontCacheInitialize: hi=%ld, lo=%ld, bal=%d\n", - CacheHiMark, CacheLowMark, CacheBalance); -#endif - - CacheInitialized = 1; - } else { - /* - * second time or later case. - * flush and reassign cache. - */ -#if defined(HASH_DEBUG) || defined(DEBUG) - fprintf(stderr, "FontCacheInitialize: initializing cache, again\n"); -#endif - } - - memset(&CacheStatistics, 0, sizeof (CacheStatistics)); -#endif /* FONTCACHE */ - - return 0; /* make lint happy */ -} - -/* - * FontCacheChangeSettings() - * - * Change cache size and reinitialize work areas. - * - * Returns 0, if memory allocation failed. Otherwise 1. - */ - -int -FontCacheChangeSettings(FontCacheSettingsPtr cs) -{ - int result; - - if (!CacheInitialized) { - FontCacheInitialize(); - if (!CacheInitialized) - return 0; - } - -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, - "FontCahceChangeSettings: hi-mark=%ld, low-mark=%ld, balance=%ld\n", - cs->himark, cs->lowmark, cs->balance); -#endif - - fc_flush_cache(); - - CacheHiMark = cs->himark; - CacheLowMark = cs->lowmark; - CacheBalance = cs->balance; - - fc_assign_cache(); - result = fc_assign_entry(); - - return result; -} - -/* - * FontCacheGetSettings() - * - * Get current cache control parameters. - */ - -void -FontCacheGetSettings(FontCacheSettingsPtr cs) -{ - if (!CacheInitialized) { - FontCacheInitialize(); - if (!CacheInitialized) - return; - } - - cs->himark = CacheHiMark; - cs->lowmark = CacheLowMark; - cs->balance = CacheBalance; -} - -/* - * FontCacheGetStatistics() - * - * Get current cache statistics. - */ - -void -FontCacheGetStatistics(FontCacheStatisticsPtr cs) -{ - if (!CacheInitialized) { - FontCacheInitialize(); - if (!CacheInitialized) - return; - } - - CacheStatistics.purge_stat = NeedPurgeCache; - CacheStatistics.balance = CacheBalance; - CacheStatistics.f.usage = HashSize.used; - CacheStatistics.v.usage = AllocSize.used; - - memcpy(cs, &CacheStatistics, sizeof (CacheStatistics)); -} - -/* - * FontCacheOpenCache() - * - * Allocate font cache control block and initialize it. - * - * Returns pointer to font cache control block. Or returns NULL when - * detected illegal parameter or memory allocation failed. - */ - -FCCBPtr -FontCacheOpenCache(void *arg) -{ - int linesize; - FCCBPtr this; - int size = 0, mask = 0; - int i; - - static int sizes[] = { 16, 32, 64, 128, 0 }; - - if (!CacheInitialized) { - FontCacheInitialize(); - if (!CacheInitialized) - return NULL; - } - - linesize = (long)arg; -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "FontCacheOpenCache: line size=%d\n", linesize); -#endif - - for (i = 0; sizes[i] != 0; i++) { - if (sizes[i] == linesize) { - size = linesize; - mask = linesize - 1; - break; - } - } - if (sizes[i] == 0) { - return NULL; - } - - this = (FCCBPtr) malloc(sizeof (FCCB)); - if (this != NULL) { - memset(this, 0, sizeof (FCCB)); - this->head = (FontCacheHeadPtr) malloc(sizeof (FontCacheHead) * size); - if (this->head == NULL) { - free(this); - this = NULL; - } else { - this->size = size; - this->mask = mask; - for (i = 0; i < size; i++) { - TAILQ_INIT(&this->head[i]); - } - } - } - - return this; -} - -/* - * FontCacheCloseCache() - * - * Release font cache control block and all it's related entries. - */ - -void -FontCacheCloseCache(FCCBPtr this) -{ - FontCacheEntryPtr entry, next; - int i; - int size; - - if (!CacheInitialized) { - return; - } - - size = this->size; - for (i = 0; i < size; i++) { - entry = TAILQ_FIRST(&this->head[i]); - while (entry != NULL) { - /* remove entry from in-use queue, here */ - TAILQ_REMOVE(InUseQueue, entry, c_lru); - - /* remove entry from the hash */ - if (entry->bitmapsize > FC_SMALL_BITMAP_SIZE - && entry->charInfo.bits != NULL) { - fc_free_bitmap_area(entry->bmp); - } - entry->charInfo.bits = NULL; - entry->bitmapsize = 0; - - next = TAILQ_NEXT(entry, c_hash); - TAILQ_INSERT_HEAD(FreeQueue, entry, c_lru); - HashSize.used -= sizeof (FontCacheEntry); - entry = next; - } - } - - free(this->head); - free(this); -} - -/* - * FontCacheGetEntry() - * - * Allocate font cache entry and initialize it. - */ - -FontCacheEntryPtr -FontCacheGetEntry() -{ - FontCacheEntryPtr entry; - FontCacheEntryPtr p; - long size; - - /* scan in-use queue and purge if required */ - fc_purge_cache(); - - /* allocate hash entry */ - if (TAILQ_EMPTY(FreeQueue)) { - size = sizeof (FontCacheEntry); - p = (FontCacheEntryPtr) malloc(size); - if (p != NULL) { - TAILQ_INSERT_HEAD(FreeQueue, p, c_lru); - HashSize.allocated += size; -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "FontCachegetEntry: allocated new entry\n"); -#endif - } - } - - if (!TAILQ_EMPTY(FreeQueue)) { - entry = TAILQ_FIRST(FreeQueue); - TAILQ_REMOVE(FreeQueue, entry, c_lru); - memset(entry, 0, sizeof (FontCacheEntry)); - } else { - entry = NULL; - } - - return entry; -} - -/* - * FontCacheGetBitmap() - * - * Allocate font glyph bitmap area. - * - * Note: - * Allocated area should be cleared. - */ - -int -FontCacheGetBitmap(FontCacheEntryPtr entry, int size) -{ - int oldsize; - int result; - - /* XXX */ - if ((AllocSize.used > AllocSize.hiMark - size) && - (size > FC_SMALL_BITMAP_SIZE)) { - fc_purge_bitmap(); - } - - if (size < 0) /* wrong size */ - return 0; - - result = 0; - oldsize = entry->bitmapsize; - if (size <= FC_SMALL_BITMAP_SIZE) { - /* use coresponding bitmap area */ - if (oldsize > FC_SMALL_BITMAP_SIZE) { - /* We don't need allocated area anymore */ - fc_free_bitmap_area(entry->bmp); - } - entry->bitmapsize = size; - if (size > 0) { - entry->charInfo.bits = entry->bitmap; - memset(entry->charInfo.bits, 0, size); - } else - entry->charInfo.bits = NULL; - - result = 1; - } else { - /* need extra bitmap area */ - if (entry->charInfo.bits == NULL) { - /* no any extra bitmap area */ - if (fc_get_bitmap_area(entry, size)) { - entry->bitmapsize = size; - memset(entry->charInfo.bits, 0, size); - if (fc_check_size(HI_MARK)) { - fc_purge_cache(); - } - result = 1; - } - } else { - /* we already have extra bitmap area */ - if (oldsize == size) { - /* same size, reuse it */ - memset(entry->charInfo.bits, 0, size); - result = 1; - } else { - /* different size */ - fc_free_bitmap_area(entry->bmp); - if (fc_get_bitmap_area(entry, size)) { - entry->bitmapsize = size; - memset(entry->charInfo.bits, 0, size); - if (fc_check_size(HI_MARK)) { - fc_purge_cache(); - } - result = 1; - } - } - } - } - - return result; -} - -/* - * FontCacheSearchEntry() - * - * Search an entry matched with the key from the hash. - */ - -int -FontCacheSearchEntry(FCCBPtr this, int key, FontCacheEntryPtr *value) -{ - FontCacheHeadPtr head; - FontCacheEntryPtr entry; - int index; - - index = key & this->mask; - head = &this->head[index]; - - TAILQ_FOREACH(entry, head, c_hash) { - if (entry->key == key) { - /* found, change position */ - CacheStatistics.f.hits++; - - TAILQ_REMOVE(InUseQueue, entry, c_lru); - TAILQ_INSERT_HEAD(InUseQueue, entry, c_lru); - - TAILQ_REMOVE(head, entry, c_hash); - TAILQ_INSERT_HEAD(head, entry, c_hash); - - /* purge least recentrly used cache entirs */ - fc_purge_cache(); - - *value = entry; - return 1; - } - } - - /* purge least recentrly used cache entirs */ - fc_purge_cache(); - - /* not found */ - CacheStatistics.f.misshits++; - *value = NULL; - return 0; -} - -/* - * FontCacheInsertEntry() - * - * Insert an entry into the cache pool. - */ - -int -FontCacheInsertEntry(FCCBPtr this, int key, FontCacheEntryPtr entry) -{ - FontCacheHeadPtr head; - int index; - - index = key & this->mask; - head = &this->head[index]; - - entry->key = key; - entry->c_head = head; - TAILQ_INSERT_HEAD(head, entry, c_hash); - - /* insert entry into in-use queue */ - TAILQ_INSERT_HEAD(InUseQueue, entry, c_lru); - - /* adjust cache in-use size */ - HashSize.used += sizeof (FontCacheEntry); - if (fc_check_size(HI_MARK)) { - fc_purge_cache(); - } - - return 1; -} - -/* - * fc_assign_cache() - * - * Assign cache size considered with cache balance rate. - */ - -static void -fc_assign_cache() -{ - HashSize.hiMark = (CacheHiMark * CacheBalance) / 100; - HashSize.lowMark = (CacheLowMark * CacheBalance) / 100; - - AllocSize.hiMark = (CacheHiMark * (100 - CacheBalance)) / 100; - AllocSize.lowMark = (CacheLowMark * (100 - CacheBalance)) / 100; -} - -/* - * fc_assign_entry() - * - * Assign cache entry into free queue. - * - * Returns 0, when memory allocation failed. Otherwise 1. - */ - -static int -fc_assign_entry() -{ - FontCacheEntryPtr entry; - long used; - int result = 1; - - used = 0; - while ((used + sizeof (FontCacheEntry)) < HashSize.hiMark) { - entry = (FontCacheEntryPtr) malloc(sizeof (FontCacheEntry)); - if (entry == NULL) { - fprintf(stderr, "fc_assign_entry: can't allocate memory.\n"); - result = 0; - break; - } - TAILQ_INSERT_HEAD(FreeQueue, entry, c_lru); - used += sizeof (FontCacheEntry); - HashSize.allocated += sizeof (FontCacheEntry); - } - - return result; -} - -/* - * fc_get_bitmap_area() - * - * Search allocated memory area from free bitmap hash pool. If there - * is no entry, then allocate new bitmap area. - * - * Returns 0, when memory allocation failed, otherwise 1. And some - * sort of cache entry structure members were updated. - */ - -static int -fc_get_bitmap_area(FontCacheEntryPtr this, int size) -{ - FontCacheBitmapHeadPtr head; - FontCacheBitmapPtr bitmap; - int index; - int result = 0; - - index = size & FC_MEM_HASH_MASK; - head = &FreeBitmap->head[index]; - TAILQ_FOREACH(bitmap, head, b_hash) { - if (bitmap->key == size) { - TAILQ_REMOVE(head, bitmap, b_hash); - this->bmp = bitmap; - this->charInfo.bits = (char *) (bitmap + 1); - bitmap->b_entry = this; - result = 1; - CacheStatistics.v.hits++; - AllocSize.used += (size + sizeof (FontCacheBitmap)); -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "fc_get_bitmap_area: bitmap entry found in pool\n"); -#endif - break; - } - } - - if (result == 0) { - CacheStatistics.v.misshits++; - bitmap = (FontCacheBitmapPtr) malloc(size + sizeof (FontCacheBitmap)); - if (bitmap != NULL) { - bitmap->b_entry = this; - bitmap->size = size + sizeof (FontCacheBitmap); - bitmap->key = size; - this->bmp = bitmap; - this->charInfo.bits = (char *) (bitmap + 1); - AllocSize.allocated += (size + sizeof (FontCacheBitmap)); - AllocSize.used += (size + sizeof (FontCacheBitmap)); - result = 1; -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "fc_get_bitmap_area: bitmap entry allocated\n"); -#endif - } else { - this->bmp = NULL; - this->charInfo.bits = NULL; - } - } - - return result; -} - -/* - * fc_free_bitmap_area() - * - * Release allocated bitmap area into free hash pool. - */ - -static void -fc_free_bitmap_area(FontCacheBitmapPtr this) -{ - FontCacheBitmapHeadPtr head; - FontCacheEntryPtr entry; - int index; - -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "fc_free_bitmap_area: bitmap entry returns into pool\n"); -#endif - - index = this->key & FC_MEM_HASH_MASK; - head = &FreeBitmap->head[index]; - TAILQ_INSERT_HEAD(head, this, b_hash); - - AllocSize.used -= this->size; - - entry = this->b_entry; - entry->bmp = NULL; - entry->bitmapsize = 0; -} - -/* - * fc_flush_cache_bitmap() - * - * Flush all allocated bitmap area from the free hash pool. - */ - -static void -fc_flush_cache_bitmap() -{ - FontCacheBitmapHeadPtr head; - FontCacheBitmapPtr bitmap; - int i; - - for (i = 0; i < FC_MEM_HASH_SIZE; i++) { - head = &FreeBitmap->head[i]; - while (!TAILQ_EMPTY(head)) { - bitmap = TAILQ_FIRST(head); - TAILQ_REMOVE(head, bitmap, b_hash); - - AllocSize.allocated -= bitmap->size; - free(bitmap); - } - } -} - -/* - * fc_flush_cache_inuse() - * - * Release all in-use cache entries. - */ - -static void -fc_flush_cache_inuse() -{ - FontCacheEntryPtr entry; - FontCacheHeadPtr head; - - while (!TAILQ_EMPTY(InUseQueue)) { - /* remove this entry from in-use queue */ - entry = TAILQ_FIRST(InUseQueue); - TAILQ_REMOVE(InUseQueue, entry, c_lru); - - /* remove this entry from hash */ - head = entry->c_head; - TAILQ_REMOVE(head, entry, c_hash); - - /* release bitmap area */ - if (entry->bitmapsize > FC_SMALL_BITMAP_SIZE - && entry->charInfo.bits != NULL) { - fc_free_bitmap_area(entry->bmp); - } - entry->charInfo.bits = NULL; - entry->bitmapsize = 0; - - /* release font-specific private area */ - if ( entry->vfuncs && entry->vfuncs->f_private_dispose ) - (*entry->vfuncs->f_private_dispose)(entry->f_private); - entry->f_private = NULL; - entry->vfuncs = NULL; - - /* add this entry to free queue */ - TAILQ_INSERT_HEAD(FreeQueue, entry, c_lru); - - /* adjust size */ - HashSize.used -= sizeof (FontCacheEntry); - } -} - -/* - * fc_flush_cache_free() - * - * Flush all free cache entries from the free cache queue. - */ - -static void -fc_flush_cache_free() -{ - FontCacheEntryPtr entry; - - /* release entire entries of the free queue */ - while (!TAILQ_EMPTY(FreeQueue)) { - entry = TAILQ_FIRST(FreeQueue); - TAILQ_REMOVE(FreeQueue, entry, c_lru); - free(entry); - HashSize.allocated -= sizeof (FontCacheEntry); - } -} - -/* - * fc_flush_cache() - * - * Flush all cache entries and allocated bitmap area from the pool. - */ - -static void -fc_flush_cache() -{ - fc_flush_cache_inuse(); - fc_flush_cache_bitmap(); - fc_flush_cache_free(); - - memset(&CacheStatistics, 0, sizeof (CacheStatistics)); -} - -/* - * fc_check_size() - * - * Check cache size, then return it's result. - */ - -static int -fc_check_size(int mark) -{ - int result = 0; - - if (mark == LOW_MARK) { - if (HashSize.used > HashSize.lowMark) { - result |= PURGE_ENTRY; - } - if (AllocSize.used > AllocSize.lowMark) { - result |= PURGE_BITMAP; - } - } else { - if (HashSize.used > HashSize.hiMark) { - result |= PURGE_ENTRY; - } - if (AllocSize.used > AllocSize.hiMark) { - result |= PURGE_BITMAP; - } - } - - return result; -} - -/* - * fc_purge_cache_entry() - * - * Purge least recently used cache entry. - */ - -static void -fc_purge_cache_entry() -{ - FontCacheHeadPtr head; - FontCacheEntryPtr entry; - int i; - - for (i = 0; i < FC_PURGE_PER_SCAN; i++) { - /* get least recently used entry */ - entry = TAILQ_LAST(InUseQueue, FcInUseQueue); - -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "fc_purge_cache_entry: purged: %p, %d\n", - entry, entry->key); -#endif - - /* remove this entry from in-use queue */ - TAILQ_REMOVE(InUseQueue, entry, c_lru); - - /* remove this entry from the hash */ - head = entry->c_head; - TAILQ_REMOVE(head, entry, c_hash); - - /* release bitmap area */ - if (entry->bitmapsize > FC_SMALL_BITMAP_SIZE - && entry->charInfo.bits != NULL) { - fc_free_bitmap_area(entry->bmp); - CacheStatistics.v.purged++; - } - entry->charInfo.bits = NULL; - entry->bitmapsize = 0; - - /* release font-specific private area */ - if ( entry->vfuncs && entry->vfuncs->f_private_dispose ) - (*entry->vfuncs->f_private_dispose)(entry->f_private); - entry->f_private = NULL; - entry->vfuncs = NULL; - - /* add this entry to free queue */ - TAILQ_INSERT_HEAD(FreeQueue, entry, c_lru); - - HashSize.used -= sizeof (FontCacheEntry); - CacheStatistics.f.purged++; - } -} - -/* - * fc_purge_cache_entry_pool() - * - * Purge free cache entries, to adjust cache size. - */ - -static void -fc_purge_cache_entry_pool() -{ - FontCacheEntryPtr entry; - - while (!TAILQ_EMPTY(FreeQueue)) { - entry = TAILQ_LAST(FreeQueue, FcFreeQueue); - TAILQ_REMOVE(FreeQueue, entry, c_lru); -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "fc_purge_cache_entry_pool: purged from free queue: %p\n", - entry); -#endif - HashSize.allocated -= sizeof (FontCacheEntry); - free(entry); - if (HashSize.allocated <= HashSize.hiMark) { - break; - } - } -} - -/* - * fc_purge_bitmap() - * - * Purge least recently used allocated bitmap area. - */ - -static void -fc_purge_bitmap() -{ - FontCacheEntryPtr entry, first; - int purged = 0; - - /* release used entry, if required */ - first = TAILQ_FIRST(InUseQueue); - if (first != NULL) { - entry = TAILQ_LAST(InUseQueue, FcInUseQueue); - while (purged < FC_PURGE_PER_SCAN) { - if (entry->bmp != NULL) { -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "fc_purge_bitmap: purged from live queue: %p, %d(%d)\n", - entry->bmp, entry->bmp->key, entry->bmp->size); -#endif - fc_free_bitmap_area(entry->bmp); - entry->charInfo.bits = NULL; - CacheStatistics.v.purged++; - purged++; - } - if (entry == first) { - break; - } - entry = TAILQ_PREV(entry, FcInUseQueue, c_lru); - } - } -} - -/* - * fc_purge_bitmap_pool() - * - * Purge free bitmap area from pool, to adjust cache size. - */ - -static void -fc_purge_bitmap_pool() -{ - int this, stop, quit; - FontCacheBitmapHeadPtr head; - FontCacheBitmapPtr bitmap; - - /* release free bitmap entry */ - this = FreeBitmap->index; - stop = this; - quit = 0; - - do { - head = &FreeBitmap->head[this]; - while (!TAILQ_EMPTY(head)) { - bitmap = TAILQ_LAST(head, fcmem_head); - TAILQ_REMOVE(head, bitmap, b_hash); -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "fc_purge_bitmap_pool: purged from pool: %p, %d(%d)\n", - bitmap, bitmap->key, bitmap->size); -#endif - AllocSize.allocated -= bitmap->size; - free(bitmap); - if (AllocSize.allocated <= AllocSize.hiMark) { - quit = 1; - break; - } - } - this++; - this &= FC_MEM_HASH_MASK; - } while (this != stop && quit == 0); - - FreeBitmap->index++; - FreeBitmap->index &= FC_MEM_HASH_MASK; -} - -/* - * fc_purge_cache() - * - * Purge font cache, if required. - */ - -static void -fc_purge_cache() -{ - int strategy; - - if (NeedPurgeCache) { - strategy = fc_check_size(LOW_MARK); - switch (strategy) { - case PURGE_ENTRY : - CacheStatistics.purge_runs++; - fc_purge_cache_entry(); - break; - case PURGE_BITMAP : - CacheStatistics.purge_runs++; - fc_purge_bitmap(); - break; - case (PURGE_ENTRY | PURGE_BITMAP) : - CacheStatistics.purge_runs++; - fc_purge_cache_entry(); - fc_purge_bitmap(); - break; - default : - NeedPurgeCache = 0; - break; - } - } else { - strategy = fc_check_size(HI_MARK); - switch (strategy) { - case PURGE_ENTRY : - if ((CacheBalance + FC_BALANCE_DIFFS) <= FC_BALANCE_HI) { - CacheBalance += FC_BALANCE_DIFFS; -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "fc_purge_cache: cache balance changed to %d\n", CacheBalance); -#endif - fc_assign_cache(); - fc_purge_bitmap_pool(); - } else { - CacheStatistics.purge_runs++; - NeedPurgeCache = 1; - while (fc_check_size(HI_MARK) & PURGE_ENTRY) { - fc_purge_cache_entry(); - } - } - break; - case PURGE_BITMAP : - if ((CacheBalance - FC_BALANCE_DIFFS) >= FC_BALANCE_LOW) { - CacheBalance -= FC_BALANCE_DIFFS; -#if defined(HASH_DEBUG) || defined(DEBUG) -fprintf(stderr, "fc_purge_cache: cache balance changed to %d\n", CacheBalance); -#endif - fc_assign_cache(); - fc_purge_cache_entry_pool(); - } else { - CacheStatistics.purge_runs++; - NeedPurgeCache = 1; - while (fc_check_size(HI_MARK) & PURGE_BITMAP) { - fc_purge_bitmap(); - } - } - break; - case (PURGE_ENTRY | PURGE_BITMAP) : - CacheStatistics.purge_runs++; - NeedPurgeCache = 1; - while (fc_check_size(HI_MARK)) { - fc_purge_cache_entry(); - fc_purge_bitmap(); - } - break; - default : - break; - } - } -} |