#include <dirent.h>
#include <string.h>
#include <sys/types.h>
+#include <assert.h>
#if defined(HAVE_MMAP) || defined(__CYGWIN__)
# include <unistd.h>
# include <sys/mman.h>
}
static int
-FcCacheReadDirs (FcConfig * config,
- FcStrList *list, FcFontSet * set, FcStrSet *processed_dirs)
+FcDirCacheOpenFile (const FcChar8 *cache_file, struct stat *file_stat)
{
- int ret = 0;
- FcChar8 *dir;
- FcStrSet *subdirs;
- FcStrList *sublist;
+ int fd;
- /*
- * Read in the results from 'list'.
- */
- while ((dir = FcStrListNext (list)))
+ fd = open((char *) cache_file, O_RDONLY | O_BINARY);
+ if (fd < 0)
+ return fd;
+ if (fstat (fd, file_stat) < 0)
{
- if (!FcConfigAcceptFilename (config, dir))
- continue;
-
- /* Skip this directory if already updated
- * to avoid the looped directories via symlinks
- * Clearly a dir not in fonts.conf shouldn't be globally cached.
- */
-
- if (FcStrSetMember (processed_dirs, dir))
- continue;
- if (!FcStrSetAdd (processed_dirs, dir))
- continue;
-
- subdirs = FcStrSetCreate ();
- if (!subdirs)
- {
- fprintf (stderr, "Can't create directory set\n");
- ret++;
- continue;
- }
-
- FcDirScanConfig (set, subdirs,
- config->blanks, dir, FcFalse, config);
-
- sublist = FcStrListCreate (subdirs);
- FcStrSetDestroy (subdirs);
- if (!sublist)
- {
- fprintf (stderr, "Can't create subdir list in \"%s\"\n", dir);
- ret++;
- continue;
- }
- ret += FcCacheReadDirs (config, sublist, set, processed_dirs);
+ close (fd);
+ return -1;
}
- FcStrListDone (list);
- return ret;
-}
-
-FcFontSet *
-FcCacheRead (FcConfig *config)
-{
- FcFontSet *s = FcFontSetCreate();
- FcStrSet *processed_dirs;
-
- if (!s)
- return 0;
-
- processed_dirs = FcStrSetCreate();
- if (!processed_dirs)
- goto bail;
-
- if (FcCacheReadDirs (config, FcConfigGetConfigDirs (config), s, processed_dirs))
- goto bail1;
-
- FcStrSetDestroy (processed_dirs);
- return s;
-
- bail1:
- FcStrSetDestroy (processed_dirs);
- bail:
- FcFontSetDestroy (s);
- return 0;
+ return fd;
}
/*
*/
static FcBool
FcDirCacheProcess (FcConfig *config, const FcChar8 *dir,
- FcBool (*callback) (int fd, off_t size, void *closure),
- void *closure)
+ FcBool (*callback) (int fd, struct stat *stat, void *closure),
+ void *closure, FcChar8 **cache_file_ret)
{
int fd = -1;
FcChar8 cache_base[CACHEBASE_LEN];
FcChar8 *cache_hashed = FcStrPlus (cache_dir, cache_base);
if (!cache_hashed)
break;
- fd = open((char *) cache_hashed, O_RDONLY | O_BINARY);
- FcStrFree (cache_hashed);
+ fd = FcDirCacheOpenFile (cache_hashed, &file_stat);
if (fd >= 0) {
- if (fstat (fd, &file_stat) >= 0 &&
- dir_stat.st_mtime <= file_stat.st_mtime)
+ if (dir_stat.st_mtime <= file_stat.st_mtime)
{
- ret = (*callback) (fd, file_stat.st_size, closure);
+ ret = (*callback) (fd, &file_stat, closure);
if (ret)
{
+ if (cache_file_ret)
+ *cache_file_ret = cache_hashed;
+ else
+ FcStrFree (cache_hashed);
close (fd);
break;
}
}
close (fd);
}
+ FcStrFree (cache_hashed);
}
FcStrListDone (list);
return ret;
}
-FcBool
-FcDirCacheLoad (int fd, off_t size, void *closure)
+#define FC_CACHE_MIN_MMAP 1024
+
+/*
+ * Skip list element, make sure the 'next' pointer is the last thing
+ * in the structure, it will be allocated large enough to hold all
+ * of the necessary pointers
+ */
+
+typedef struct _FcCacheSkip FcCacheSkip;
+
+struct _FcCacheSkip {
+ FcCache *cache;
+ int ref;
+ intptr_t size;
+ dev_t cache_dev;
+ ino_t cache_ino;
+ time_t cache_mtime;
+ FcCacheSkip *next[1];
+};
+
+/*
+ * The head of the skip list; pointers for every possible level
+ * in the skip list, plus the largest level in the list
+ */
+
+#define FC_CACHE_MAX_LEVEL 16
+
+static FcCacheSkip *fcCacheChains[FC_CACHE_MAX_LEVEL];
+static int fcCacheMaxLevel;
+
+#if HAVE_RANDOM
+# define FcRandom() random()
+#else
+# if HAVE_LRAND48
+# define FcRandom() lrand48()
+# else
+# if HAVE_RAND
+# define FcRandom() rand()
+# endif
+# endif
+#endif
+/*
+ * Generate a random level number, distributed
+ * so that each level is 1/4 as likely as the one before
+ *
+ * Note that level numbers run 1 <= level <= MAX_LEVEL
+ */
+static int
+random_level (void)
{
- FcCache *cache;
- FcBool allocated = FcFalse;
+ /* tricky bit -- each bit is '1' 75% of the time */
+ long int bits = FcRandom () | FcRandom ();
+ int level = 0;
- if (size < sizeof (FcCache))
+ while (++level < FC_CACHE_MAX_LEVEL)
+ {
+ if (bits & 1)
+ break;
+ bits >>= 1;
+ }
+ return level;
+}
+
+/*
+ * Insert cache into the list
+ */
+static FcBool
+FcCacheInsert (FcCache *cache, struct stat *cache_stat)
+{
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i, level;
+
+ /*
+ * Find links along each chain
+ */
+ next = fcCacheChains;
+ for (i = fcCacheMaxLevel; --i >= 0; )
+ {
+ for (; (s = next[i]); next = s->next)
+ if (s->cache > cache)
+ break;
+ update[i] = &next[i];
+ }
+
+ /*
+ * Create new list element
+ */
+ level = random_level ();
+ if (level > fcCacheMaxLevel)
+ {
+ level = fcCacheMaxLevel + 1;
+ update[fcCacheMaxLevel] = &fcCacheChains[fcCacheMaxLevel];
+ fcCacheMaxLevel = level;
+ }
+
+ s = malloc (sizeof (FcCacheSkip) + (level - 1) * sizeof (FcCacheSkip *));
+ if (!s)
return FcFalse;
+
+ s->cache = cache;
+ s->size = cache->size;
+ s->ref = 1;
+ if (cache_stat)
+ {
+ s->cache_dev = cache_stat->st_dev;
+ s->cache_ino = cache_stat->st_ino;
+ s->cache_mtime = cache_stat->st_mtime;
+ }
+ else
+ {
+ s->cache_dev = 0;
+ s->cache_ino = 0;
+ s->cache_mtime = 0;
+ }
+
+ /*
+ * Insert into all fcCacheChains
+ */
+ for (i = 0; i < level; i++)
+ {
+ s->next[i] = *update[i];
+ *update[i] = s;
+ }
+ return FcTrue;
+}
+
+static FcCacheSkip *
+FcCacheFindByAddr (void *object)
+{
+ int i;
+ FcCacheSkip **next = fcCacheChains;
+ FcCacheSkip *s;
+
+ /*
+ * Walk chain pointers one level at a time
+ */
+ for (i = fcCacheMaxLevel; --i >= 0;)
+ while (next[i] && (char *) object >= ((char *) next[i]->cache + next[i]->size))
+ next = next[i]->next;
+ /*
+ * Here we are
+ */
+ s = next[0];
+ if (s && (char *) object < ((char *) s->cache + s->size))
+ return s;
+ return NULL;
+}
+
+static void
+FcCacheRemove (FcCache *cache)
+{
+ FcCacheSkip **update[FC_CACHE_MAX_LEVEL];
+ FcCacheSkip *s, **next;
+ int i;
+
+ /*
+ * Find links along each chain
+ */
+ next = fcCacheChains;
+ for (i = fcCacheMaxLevel; --i >= 0; )
+ {
+ for (; (s = next[i]); next = s->next)
+ if (s->cache >= cache)
+ break;
+ update[i] = &next[i];
+ }
+ s = next[0];
+ for (i = 0; i < fcCacheMaxLevel && *update[i] == s; i++)
+ *update[i] = s->next[i];
+ while (fcCacheMaxLevel > 0 && fcCacheChains[fcCacheMaxLevel - 1] == NULL)
+ fcCacheMaxLevel--;
+ free (s);
+}
+
+static FcCache *
+FcCacheFindByStat (struct stat *cache_stat)
+{
+ FcCacheSkip *s;
+
+ for (s = fcCacheChains[0]; s; s = s->next[0])
+ if (s->cache_dev == cache_stat->st_dev &&
+ s->cache_ino == cache_stat->st_ino &&
+ s->cache_mtime == cache_stat->st_mtime)
+ {
+ s->ref++;
+ return s->cache;
+ }
+ return NULL;
+}
+
+static void
+FcDirCacheDispose (FcCache *cache)
+{
+ switch (cache->magic) {
+ case FC_CACHE_MAGIC_ALLOC:
+ free (cache);
+ break;
+ case FC_CACHE_MAGIC_MMAP:
#if defined(HAVE_MMAP) || defined(__CYGWIN__)
- cache = mmap (0, size, PROT_READ, MAP_SHARED, fd, 0);
+ munmap (cache, cache->size);
#elif defined(_WIN32)
+ UnmapViewOfFile (cache);
+#endif
+ break;
+ }
+ FcCacheRemove (cache);
+}
+
+void
+FcCacheObjectReference (void *object)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
+
+ if (skip)
+ skip->ref++;
+}
+
+void
+FcCacheObjectDereference (void *object)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (object);
+
+ if (skip)
{
- HANDLE hFileMap;
+ skip->ref--;
+ if (skip->ref <= 0)
+ FcDirCacheDispose (skip->cache);
+ }
+}
- cache = NULL;
- hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL,
- PAGE_READONLY, 0, 0, NULL);
- if (hFileMap != NULL)
+void
+FcCacheFini (void)
+{
+ int i;
+
+ for (i = 0; i < FC_CACHE_MAX_LEVEL; i++)
+ assert (fcCacheChains[i] == NULL);
+ assert (fcCacheMaxLevel == 0);
+}
+
+/*
+ * Map a cache file into memory
+ */
+static FcCache *
+FcDirCacheMapFd (int fd, struct stat *fd_stat)
+{
+ FcCache *cache;
+ FcBool allocated = FcFalse;
+
+ if (fd_stat->st_size < sizeof (FcCache))
+ return NULL;
+ cache = FcCacheFindByStat (fd_stat);
+ if (cache)
+ return cache;
+ /*
+ * For small cache files, just read them into memory
+ */
+ if (fd_stat->st_size >= FC_CACHE_MIN_MMAP)
+ {
+#if defined(HAVE_MMAP) || defined(__CYGWIN__)
+ cache = mmap (0, fd_stat->st_size, PROT_READ, MAP_SHARED, fd, 0);
+#elif defined(_WIN32)
{
- cache = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, 0, size);
- CloseHandle (hFileMap);
+ HANDLE hFileMap;
+
+ cache = NULL;
+ hFileMap = CreateFileMapping((HANDLE) _get_osfhandle(fd), NULL,
+ PAGE_READONLY, 0, 0, NULL);
+ if (hFileMap != NULL)
+ {
+ cache = MapViewOfFile (hFileMap, FILE_MAP_READ, 0, 0,
+ fd_stat->st_size);
+ CloseHandle (hFileMap);
+ }
}
- }
#endif
+ }
if (!cache)
{
- cache = malloc (size);
+ cache = malloc (fd_stat->st_size);
if (!cache)
- return FcFalse;
+ return NULL;
- if (read (fd, cache, size) != size)
+ if (read (fd, cache, fd_stat->st_size) != fd_stat->st_size)
{
free (cache);
- return FcFalse;
+ return NULL;
}
allocated = FcTrue;
}
- if (cache->magic != FC_CACHE_MAGIC ||
- cache->size != size)
+ if (cache->magic != FC_CACHE_MAGIC_MMAP ||
+ cache->version < FC_CACHE_CONTENT_VERSION ||
+ cache->size != fd_stat->st_size ||
+ !FcCacheInsert (cache, fd_stat))
{
if (allocated)
free (cache);
else
{
#if defined(HAVE_MMAP) || defined(__CYGWIN__)
- munmap (cache, size);
+ munmap (cache, fd_stat->st_size);
#elif defined(_WIN32)
UnmapViewOfFile (cache);
#endif
}
- return FcFalse;
+ return NULL;
}
/* Mark allocated caches so they're freed rather than unmapped */
if (allocated)
- cache->magic = FC_CACHE_MAGIC_COPY;
+ cache->magic = FC_CACHE_MAGIC_ALLOC;
+ return cache;
+}
+
+void
+FcDirCacheReference (FcCache *cache, int nref)
+{
+ FcCacheSkip *skip = FcCacheFindByAddr (cache);
+
+ if (skip)
+ skip->ref += nref;
+}
+
+void
+FcDirCacheUnload (FcCache *cache)
+{
+ FcCacheObjectDereference (cache);
+}
+
+static FcBool
+FcDirCacheMapHelper (int fd, struct stat *fd_stat, void *closure)
+{
+ FcCache *cache = FcDirCacheMapFd (fd, fd_stat);
+
+ if (!cache)
+ return FcFalse;
*((FcCache **) closure) = cache;
return FcTrue;
}
FcCache *
-FcDirCacheMap (const FcChar8 *dir, FcConfig *config)
+FcDirCacheLoad (const FcChar8 *dir, FcConfig *config, FcChar8 **cache_file)
{
FcCache *cache = NULL;
if (!FcDirCacheProcess (config, dir,
- FcDirCacheLoad,
- &cache))
+ FcDirCacheMapHelper,
+ &cache, cache_file))
return NULL;
return cache;
}
-FcBool
-FcDirCacheRead (FcFontSet * set, FcStrSet * dirs,
- const FcChar8 *dir, FcConfig *config)
+FcCache *
+FcDirCacheLoadFile (const FcChar8 *cache_file, struct stat *file_stat)
{
- FcCache *cache;
- int i;
- FcFontSet *cache_set;
- intptr_t *cache_dirs;
- FcPattern **cache_fonts;
+ int fd;
+ FcCache *cache;
- cache = FcDirCacheMap (dir, config);
- if (!cache)
- return FcFalse;
-
- cache_set = FcCacheSet (cache);
- cache_fonts = FcFontSetFonts(cache_set);
- if (FcDebug() & FC_DBG_CACHE)
- printf ("FcDirCacheRead mapped cache for %s (%d fonts %d subdirs)\n",
- dir, cache_set->nfont, cache->dirs_count);
- for (i = 0; i < cache_set->nfont; i++)
- {
- FcPattern *font = FcEncodedOffsetToPtr (cache_set,
- cache_fonts[i],
- FcPattern);
- if (FcDebug() & FC_DBG_CACHEV) {
- printf ("Mapped font %d\n", i);
- FcPatternPrint (font);
- }
- FcFontSetAdd (set, font);
- }
-
- cache_dirs = FcCacheDirs (cache);
- for (i = 0; i < cache->dirs_count; i++)
- FcStrSetAdd (dirs, FcOffsetToPtr (cache_dirs,
- cache_dirs[i],
- FcChar8));
-
- if (config)
- FcConfigAddFontDir (config, (FcChar8 *)dir);
-
- return FcTrue;
+ fd = FcDirCacheOpenFile (cache_file, file_stat);
+ if (fd < 0)
+ return NULL;
+ cache = FcDirCacheMapFd (fd, file_stat);
+ close (fd);
+ return cache;
}
-
+
+/*
+ * Validate a cache file by reading the header and checking
+ * the magic number and the size field
+ */
static FcBool
-FcDirCacheValidate (int fd, off_t size, void *closure)
+FcDirCacheValidateHelper (int fd, struct stat *fd_stat, void *closure)
{
FcBool ret = FcTrue;
FcCache c;
- struct stat file_stat;
if (read (fd, &c, sizeof (FcCache)) != sizeof (FcCache))
ret = FcFalse;
- else if (fstat (fd, &file_stat) < 0)
+ else if (c.magic != FC_CACHE_MAGIC_MMAP)
ret = FcFalse;
- else if (c.magic != FC_CACHE_MAGIC)
+ else if (c.version < FC_CACHE_CONTENT_VERSION)
ret = FcFalse;
- else if (file_stat.st_size != c.size)
+ else if (fd_stat->st_size != c.size)
ret = FcFalse;
return ret;
}
-FcBool
-FcDirCacheValid (const FcChar8 *dir, FcConfig *config)
+static FcBool
+FcDirCacheValidConfig (const FcChar8 *dir, FcConfig *config)
{
- return FcDirCacheProcess (config, dir, FcDirCacheValidate, NULL);
+ return FcDirCacheProcess (config, dir,
+ FcDirCacheValidateHelper,
+ NULL, NULL);
}
-void
-FcDirCacheUnmap (FcCache *cache)
+FcBool
+FcDirCacheValid (const FcChar8 *dir)
{
- if (cache->magic == FC_CACHE_MAGIC_COPY)
- {
- free (cache);
- return;
- }
-#if defined(HAVE_MMAP) || defined(__CYGWIN__)
- munmap (cache, cache->size);
-#elif defined(_WIN32)
- UnmapViewOfFile (cache);
-#endif
+ FcConfig *config;
+
+ config = FcConfigGetCurrent ();
+ if (!config)
+ return FcFalse;
+
+ return FcDirCacheValidConfig (dir, config);
}
/*
- * Cache file is:
- *
- * FcCache
- * dir name
- * subdirs
- * FcFontSet
+ * Build a cache structure from the given contents
*/
-
-static FcCache *
-FcDirCacheProduce (FcFontSet *set, const FcChar8 *dir, FcStrSet *dirs)
+FcCache *
+FcDirCacheBuild (FcFontSet *set, const FcChar8 *dir, FcStrSet *dirs)
{
FcSerialize *serialize = FcSerializeCreate ();
FcCache *cache;
serialize->linear = cache;
- cache->magic = FC_CACHE_MAGIC;
+ cache->magic = FC_CACHE_MAGIC_ALLOC;
+ cache->version = FC_CACHE_CONTENT_VERSION;
cache->size = serialize->size;
/*
FcSerializeDestroy (serialize);
+ FcCacheInsert (cache, NULL);
+
return cache;
bail2:
return NULL;
}
+
+#ifdef _WIN32
+#define mkdir(path,mode) _mkdir(path)
+#endif
+
static FcBool
FcMakeDirectory (const FcChar8 *dir)
{
/* write serialized state to the cache file */
FcBool
-FcDirCacheWrite (FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir, FcConfig *config)
+FcDirCacheWrite (FcCache *cache, FcConfig *config)
{
+ FcChar8 *dir = FcCacheDir (cache);
FcChar8 cache_base[CACHEBASE_LEN];
FcChar8 *cache_hashed;
int fd;
FcAtomic *atomic;
- FcCache *cache;
FcStrList *list;
FcChar8 *cache_dir = NULL;
FcChar8 *test_dir;
+ int magic;
+ int written;
/*
* Write it to the first directory in the list which is writable
if (!cache_hashed)
return FcFalse;
- cache = FcDirCacheProduce (set, dir, dirs);
-
- if (!cache)
- goto bail1;
-
if (FcDebug () & FC_DBG_CACHE)
printf ("FcDirCacheWriteDir dir \"%s\" file \"%s\"\n",
dir, cache_hashed);
atomic = FcAtomicCreate ((FcChar8 *)cache_hashed);
if (!atomic)
- goto bail2;
+ goto bail1;
if (!FcAtomicLock (atomic))
goto bail3;
if (fd == -1)
goto bail4;
- if (write (fd, cache, cache->size) != cache->size)
+ /* Temporarily switch magic to MMAP while writing to file */
+ magic = cache->magic;
+ if (magic != FC_CACHE_MAGIC_MMAP)
+ cache->magic = FC_CACHE_MAGIC_MMAP;
+
+ /*
+ * Write cache contents to file
+ */
+ written = write (fd, cache, cache->size);
+
+ /* Switch magic back */
+ if (magic != FC_CACHE_MAGIC_MMAP)
+ cache->magic = magic;
+
+ if (written != cache->size)
{
perror ("write cache");
goto bail5;
close(fd);
if (!FcAtomicReplaceOrig(atomic))
goto bail4;
- FcStrFree ((FcChar8 *)cache_hashed);
+ FcStrFree (cache_hashed);
FcAtomicUnlock (atomic);
FcAtomicDestroy (atomic);
return FcTrue;
FcAtomicUnlock (atomic);
bail3:
FcAtomicDestroy (atomic);
- bail2:
- free (cache);
bail1:
- FcStrFree ((FcChar8 *)cache_hashed);
+ FcStrFree (cache_hashed);
return FcFalse;
}
+/*
+ * Hokey little macro trick to permit the definitions of C functions
+ * with the same name as CPP macros
+ */
+#define args(x...) (x)
+
+const FcChar8 *
+FcCacheDir args(const FcCache *c)
+{
+ return FcCacheDir (c);
+}
+
+FcFontSet *
+FcCacheCopySet args(const FcCache *c)
+{
+ FcFontSet *old = FcCacheSet (c);
+ FcFontSet *new = FcFontSetCreate ();
+ int i;
+
+ if (!new)
+ return NULL;
+ for (i = 0; i < old->nfont; i++)
+ {
+ FcPattern *font = FcFontSetFont (old, i);
+
+ FcPatternReference (font);
+ if (!FcFontSetAdd (new, font))
+ {
+ FcFontSetDestroy (new);
+ return NULL;
+ }
+ }
+ return new;
+}
+
+const FcChar8 *
+FcCacheSubdir args(const FcCache *c, int i)
+{
+ return FcCacheSubdir (c, i);
+}
+
+int
+FcCacheNumSubdir args(const FcCache *c)
+{
+ return c->dirs_count;
+}
+
+int
+FcCacheNumFont args(const FcCache *c)
+{
+ return FcCacheSet(c)->nfont;
+}
+
/*
* This code implements the MD5 message-digest algorithm.
* The algorithm is due to Ron Rivest. This code was
buf[2] += c;
buf[3] += d;
}
+#define __fccache__
+#include "fcaliastail.h"
+#undef __fccache__
git.wh0rd.org / fontconfig.git / blobdiff