/* Sparse Arrays for Objective C dispatch tables
- Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1995, 1996, 2002, 2004 Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
-GNU CC is distributed in the hope that it will be useful,
+GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
/* As a special exception, if you link this library with files
compiled with GCC to produce an executable, this does not cause
int narrays = 0; /* !T:MUTEX */
int idxsize = 0; /* !T:MUTEX */
-static void * first_free_data = NULL; /* !T:MUTEX */
+static void *first_free_data = NULL; /* !T:MUTEX */
#ifdef OBJC_SPARSE2
-const char* __objc_sparse2_id = "2 level sparse indices";
+const char *__objc_sparse2_id = "2 level sparse indices";
#endif
#ifdef OBJC_SPARSE3
-const char* __objc_sparse3_id = "3 level sparse indices";
-#endif
-
-#ifdef __alpha__
-const void *memcpy (void*, const void*, size_t);
+const char *__objc_sparse3_id = "3 level sparse indices";
#endif
/* This function removes any structures left over from free operations
that were not safe in a multi-threaded environment. */
void
-sarray_remove_garbage(void)
+sarray_remove_garbage (void)
{
void **vp;
void *np;
- objc_mutex_lock(__objc_runtime_mutex);
+ objc_mutex_lock (__objc_runtime_mutex);
vp = first_free_data;
first_free_data = NULL;
while (vp) {
np = *vp;
- objc_free(vp);
+ objc_free (vp);
vp = np;
}
- objc_mutex_unlock(__objc_runtime_mutex);
+ objc_mutex_unlock (__objc_runtime_mutex);
}
/* Free a block of dynamically allocated memory. If we are in multi-threaded
freed later. */
static void
-sarray_free_garbage(void *vp)
+sarray_free_garbage (void *vp)
{
- objc_mutex_lock(__objc_runtime_mutex);
+ objc_mutex_lock (__objc_runtime_mutex);
if (__objc_runtime_threads_alive == 1) {
- objc_free(vp);
+ objc_free (vp);
if (first_free_data)
- sarray_remove_garbage();
+ sarray_remove_garbage ();
}
else {
*(void **)vp = first_free_data;
first_free_data = vp;
}
- objc_mutex_unlock(__objc_runtime_mutex);
+ objc_mutex_unlock (__objc_runtime_mutex);
}
/* sarray_at_put : copies data in such a way as to be thread reader safe. */
void
-sarray_at_put(struct sarray* array, sidx index, void* element)
+sarray_at_put (struct sarray *array, sidx index, void *element)
{
#ifdef OBJC_SPARSE3
- struct sindex** the_index;
- struct sindex* new_index;
+ struct sindex **the_index;
+ struct sindex *new_index;
#endif
- struct sbucket** the_bucket;
- struct sbucket* new_bucket;
+ struct sbucket **the_bucket;
+ struct sbucket *new_bucket;
#ifdef OBJC_SPARSE3
size_t ioffset;
#endif
#endif
#endif /* not PRECOMPUTE_SELECTORS */
- assert(soffset_decode(index) < array->capacity); /* Range check */
+ assert (soffset_decode (index) < array->capacity); /* Range check */
#ifdef OBJC_SPARSE3
the_index = &(array->indices[ioffset]);
if ((*the_index) == array->empty_index) {
/* The index was previously empty, allocate a new */
- new_index = (struct sindex*)objc_malloc(sizeof(struct sindex));
- memcpy(new_index, array->empty_index, sizeof(struct sindex));
+ new_index = (struct sindex *) objc_malloc (sizeof (struct sindex));
+ memcpy (new_index, array->empty_index, sizeof (struct sindex));
new_index->version.version = array->version.version;
*the_index = new_index; /* Prepared for install. */
the_bucket = &((*the_index)->buckets[boffset]);
} else if ((*the_index)->version.version != array->version.version) {
/* This index must be lazy copied */
- struct sindex* old_index = *the_index;
- new_index = (struct sindex*)objc_malloc(sizeof(struct sindex));
- memcpy( new_index, old_index, sizeof(struct sindex));
+ struct sindex *old_index = *the_index;
+ new_index = (struct sindex *) objc_malloc (sizeof (struct sindex));
+ memcpy (new_index, old_index, sizeof (struct sindex));
new_index->version.version = array->version.version;
*the_index = new_index; /* Prepared for install. */
the_bucket = &((*the_index)->buckets[boffset]);
/* The bucket was previously empty (or something like that), */
/* allocate a new. This is the effect of `lazy' allocation */
- new_bucket = (struct sbucket*)objc_malloc(sizeof(struct sbucket));
- memcpy((void *) new_bucket, (const void*)array->empty_bucket,
- sizeof(struct sbucket));
+ new_bucket = (struct sbucket *) objc_malloc (sizeof (struct sbucket));
+ memcpy ((void *) new_bucket, (const void *) array->empty_bucket,
+ sizeof (struct sbucket));
new_bucket->version.version = array->version.version;
*the_bucket = new_bucket; /* Prepared for install. */
} else if ((*the_bucket)->version.version != array->version.version) {
/* Perform lazy copy. */
- struct sbucket* old_bucket = *the_bucket;
- new_bucket = (struct sbucket*)objc_malloc(sizeof(struct sbucket));
- memcpy( new_bucket, old_bucket, sizeof(struct sbucket));
+ struct sbucket *old_bucket = *the_bucket;
+ new_bucket = (struct sbucket *) objc_malloc (sizeof (struct sbucket));
+ memcpy (new_bucket, old_bucket, sizeof (struct sbucket));
new_bucket->version.version = array->version.version;
*the_bucket = new_bucket; /* Prepared for install. */
}
void
-sarray_at_put_safe(struct sarray* array, sidx index, void* element)
+sarray_at_put_safe (struct sarray *array, sidx index, void *element)
{
- if(soffset_decode(index) >= array->capacity)
- sarray_realloc(array, soffset_decode(index)+1);
- sarray_at_put(array, index, element);
+ if (soffset_decode (index) >= array->capacity)
+ sarray_realloc (array, soffset_decode (index) + 1);
+ sarray_at_put (array, index, element);
}
-struct sarray*
-sarray_new (int size, void* default_element)
+struct sarray *
+sarray_new (int size, void *default_element)
{
- struct sarray* arr;
+ struct sarray *arr;
#ifdef OBJC_SPARSE3
- size_t num_indices = ((size-1)/(INDEX_CAPACITY))+1;
- struct sindex ** new_indices;
+ size_t num_indices = ((size - 1)/(INDEX_CAPACITY)) + 1;
+ struct sindex **new_indices;
#else /* OBJC_SPARSE2 */
- size_t num_indices = ((size-1)/BUCKET_SIZE)+1;
- struct sbucket ** new_buckets;
+ size_t num_indices = ((size - 1)/BUCKET_SIZE) + 1;
+ struct sbucket **new_buckets;
#endif
- int counter;
+ size_t counter;
- assert(size > 0);
+ assert (size > 0);
/* Allocate core array */
- arr = (struct sarray*) objc_malloc(sizeof(struct sarray));
+ arr = (struct sarray *) objc_malloc (sizeof (struct sarray));
arr->version.version = 0;
/* Initialize members */
#ifdef OBJC_SPARSE3
arr->capacity = num_indices*INDEX_CAPACITY;
- new_indices = (struct sindex**)
- objc_malloc(sizeof(struct sindex*)*num_indices);
+ new_indices = (struct sindex **)
+ objc_malloc (sizeof (struct sindex *) * num_indices);
- arr->empty_index = (struct sindex*) objc_malloc(sizeof(struct sindex));
+ arr->empty_index = (struct sindex *) objc_malloc (sizeof (struct sindex));
arr->empty_index->version.version = 0;
narrays += 1;
#else /* OBJC_SPARSE2 */
arr->capacity = num_indices*BUCKET_SIZE;
- new_buckets = (struct sbucket**)
- objc_malloc(sizeof(struct sbucket*)*num_indices);
+ new_buckets = (struct sbucket **)
+ objc_malloc (sizeof (struct sbucket *) * num_indices);
narrays += 1;
idxsize += num_indices;
#endif
- arr->empty_bucket = (struct sbucket*) objc_malloc(sizeof(struct sbucket));
+ arr->empty_bucket = (struct sbucket *) objc_malloc (sizeof (struct sbucket));
arr->empty_bucket->version.version = 0;
nbuckets += 1;
arr->ref_count = 1;
- arr->is_copy_of = (struct sarray*)0;
+ arr->is_copy_of = (struct sarray *) 0;
- for (counter=0; counter<BUCKET_SIZE; counter++)
+ for (counter = 0; counter < BUCKET_SIZE; counter++)
arr->empty_bucket->elems[counter] = default_element;
#ifdef OBJC_SPARSE3
- for (counter=0; counter<INDEX_SIZE; counter++)
+ for (counter = 0; counter < INDEX_SIZE; counter++)
arr->empty_index->buckets[counter] = arr->empty_bucket;
- for (counter=0; counter<num_indices; counter++)
+ for (counter = 0; counter < num_indices; counter++)
new_indices[counter] = arr->empty_index;
#else /* OBJC_SPARSE2 */
- for (counter=0; counter<num_indices; counter++)
+ for (counter = 0; counter < num_indices; counter++)
new_buckets[counter] = arr->empty_bucket;
#endif
any concurrent readers notice the update. */
void
-sarray_realloc(struct sarray* array, int newsize)
+sarray_realloc (struct sarray *array, int newsize)
{
#ifdef OBJC_SPARSE3
- size_t old_max_index = (array->capacity-1)/INDEX_CAPACITY;
- size_t new_max_index = ((newsize-1)/INDEX_CAPACITY);
- size_t rounded_size = (new_max_index+1)*INDEX_CAPACITY;
+ size_t old_max_index = (array->capacity - 1)/INDEX_CAPACITY;
+ size_t new_max_index = ((newsize - 1)/INDEX_CAPACITY);
+ size_t rounded_size = (new_max_index + 1) * INDEX_CAPACITY;
- struct sindex ** new_indices;
- struct sindex ** old_indices;
+ struct sindex **new_indices;
+ struct sindex **old_indices;
#else /* OBJC_SPARSE2 */
- size_t old_max_index = (array->capacity-1)/BUCKET_SIZE;
- size_t new_max_index = ((newsize-1)/BUCKET_SIZE);
- size_t rounded_size = (new_max_index+1)*BUCKET_SIZE;
+ size_t old_max_index = (array->capacity - 1)/BUCKET_SIZE;
+ size_t new_max_index = ((newsize - 1)/BUCKET_SIZE);
+ size_t rounded_size = (new_max_index + 1) * BUCKET_SIZE;
- struct sbucket ** new_buckets;
- struct sbucket ** old_buckets;
+ struct sbucket **new_buckets;
+ struct sbucket **old_buckets;
#endif
- int counter;
+ size_t counter;
- assert(newsize > 0);
+ assert (newsize > 0);
/* The size is the same, just ignore the request */
- if(rounded_size <= array->capacity)
+ if (rounded_size <= array->capacity)
return;
- assert(array->ref_count == 1); /* stop if lazy copied... */
+ assert (array->ref_count == 1); /* stop if lazy copied... */
/* We are asked to extend the array -- allocate new bucket table, */
/* and insert empty_bucket in newly allocated places. */
- if(rounded_size > array->capacity)
+ if (rounded_size > array->capacity)
{
#ifdef OBJC_SPARSE3
new_max_index += 4;
- rounded_size = (new_max_index+1)*INDEX_CAPACITY;
+ rounded_size = (new_max_index + 1) * INDEX_CAPACITY;
#else /* OBJC_SPARSE2 */
new_max_index += 4;
- rounded_size = (new_max_index+1)*BUCKET_SIZE;
+ rounded_size = (new_max_index + 1) * BUCKET_SIZE;
#endif
/* update capacity */
#ifdef OBJC_SPARSE3
/* alloc to force re-read by any concurrent readers. */
old_indices = array->indices;
- new_indices = (struct sindex**)
- objc_malloc((new_max_index+1)*sizeof(struct sindex*));
+ new_indices = (struct sindex **)
+ objc_malloc ((new_max_index + 1) * sizeof (struct sindex *));
#else /* OBJC_SPARSE2 */
old_buckets = array->buckets;
- new_buckets = (struct sbucket**)
- objc_malloc((new_max_index+1)*sizeof(struct sbucket*));
+ new_buckets = (struct sbucket **)
+ objc_malloc ((new_max_index + 1) * sizeof (struct sbucket *));
#endif
/* copy buckets below old_max_index (they are still valid) */
- for(counter = 0; counter <= old_max_index; counter++ ) {
+ for (counter = 0; counter <= old_max_index; counter++ ) {
#ifdef OBJC_SPARSE3
new_indices[counter] = old_indices[counter];
#else /* OBJC_SPARSE2 */
#ifdef OBJC_SPARSE3
/* reset entries above old_max_index to empty_bucket */
- for(counter = old_max_index+1; counter <= new_max_index; counter++)
+ for (counter = old_max_index + 1; counter <= new_max_index; counter++)
new_indices[counter] = array->empty_index;
#else /* OBJC_SPARSE2 */
/* reset entries above old_max_index to empty_bucket */
- for(counter = old_max_index+1; counter <= new_max_index; counter++)
+ for (counter = old_max_index + 1; counter <= new_max_index; counter++)
new_buckets[counter] = array->empty_bucket;
#endif
#ifdef OBJC_SPARSE3
/* free the old indices */
- sarray_free_garbage(old_indices);
+ sarray_free_garbage (old_indices);
#else /* OBJC_SPARSE2 */
- sarray_free_garbage(old_buckets);
+ sarray_free_garbage (old_buckets);
#endif
idxsize += (new_max_index-old_max_index);
/* Free a sparse array allocated with sarray_new */
void
-sarray_free(struct sarray* array) {
-
+sarray_free (struct sarray *array) {
#ifdef OBJC_SPARSE3
- size_t old_max_index = (array->capacity-1)/INDEX_CAPACITY;
- struct sindex ** old_indices;
+ size_t old_max_index = (array->capacity - 1)/INDEX_CAPACITY;
+ struct sindex **old_indices;
#else
- size_t old_max_index = (array->capacity-1)/BUCKET_SIZE;
- struct sbucket ** old_buckets;
+ size_t old_max_index = (array->capacity - 1)/BUCKET_SIZE;
+ struct sbucket **old_buckets;
#endif
- int counter = 0;
+ size_t counter = 0;
- assert(array->ref_count != 0); /* Freed multiple times!!! */
+ assert (array->ref_count != 0); /* Freed multiple times!!! */
- if(--(array->ref_count) != 0) /* There exists copies of me */
+ if (--(array->ref_count) != 0) /* There exists copies of me */
return;
#ifdef OBJC_SPARSE3
#else
old_buckets = array->buckets;
#endif
-
- if((array->is_copy_of) && ((array->is_copy_of->ref_count - 1) == 0))
- sarray_free(array->is_copy_of);
/* Free all entries that do not point to empty_bucket */
- for(counter = 0; counter <= old_max_index; counter++ ) {
+ for (counter = 0; counter <= old_max_index; counter++ ) {
#ifdef OBJC_SPARSE3
- struct sindex* idx = old_indices[counter];
- if((idx != array->empty_index) &&
+ struct sindex *idx = old_indices[counter];
+ if ((idx != array->empty_index) &&
(idx->version.version == array->version.version)) {
int c2;
- for(c2=0; c2<INDEX_SIZE; c2++) {
- struct sbucket* bkt = idx->buckets[c2];
- if((bkt != array->empty_bucket) &&
+ for (c2 = 0; c2 < INDEX_SIZE; c2++) {
+ struct sbucket *bkt = idx->buckets[c2];
+ if ((bkt != array->empty_bucket) &&
(bkt->version.version == array->version.version))
{
- sarray_free_garbage(bkt);
+ sarray_free_garbage (bkt);
nbuckets -= 1;
}
}
- sarray_free_garbage(idx);
+ sarray_free_garbage (idx);
nindices -= 1;
}
#else /* OBJC_SPARSE2 */
- struct sbucket* bkt = array->buckets[counter];
+ struct sbucket *bkt = array->buckets[counter];
if ((bkt != array->empty_bucket) &&
(bkt->version.version == array->version.version))
{
- sarray_free_garbage(bkt);
+ sarray_free_garbage (bkt);
nbuckets -= 1;
}
#endif
#ifdef OBJC_SPARSE3
/* free empty_index */
- if(array->empty_index->version.version == array->version.version) {
- sarray_free_garbage(array->empty_index);
+ if (array->empty_index->version.version == array->version.version) {
+ sarray_free_garbage (array->empty_index);
nindices -= 1;
}
#endif
/* free empty_bucket */
- if(array->empty_bucket->version.version == array->version.version) {
- sarray_free_garbage(array->empty_bucket);
+ if (array->empty_bucket->version.version == array->version.version) {
+ sarray_free_garbage (array->empty_bucket);
nbuckets -= 1;
}
- idxsize -= (old_max_index+1);
+ idxsize -= (old_max_index + 1);
narrays -= 1;
#ifdef OBJC_SPARSE3
/* free bucket table */
- sarray_free_garbage(array->indices);
+ sarray_free_garbage (array->indices);
#else
/* free bucket table */
- sarray_free_garbage(array->buckets);
+ sarray_free_garbage (array->buckets);
#endif
+ /* If this is a copy of another array, we free it (which might just
+ * decrement its reference count so it will be freed when no longer in use).
+ */
+ if (array->is_copy_of)
+ sarray_free (array->is_copy_of);
+
/* free array */
- sarray_free_garbage(array);
+ sarray_free_garbage (array);
}
/* This is a lazy copy. Only the core of the structure is actually */
/* copied. */
-struct sarray*
-sarray_lazy_copy(struct sarray* oarr)
+struct sarray *
+sarray_lazy_copy (struct sarray *oarr)
{
- struct sarray* arr;
+ struct sarray *arr;
#ifdef OBJC_SPARSE3
- size_t num_indices = ((oarr->capacity-1)/INDEX_CAPACITY)+1;
- struct sindex ** new_indices;
+ size_t num_indices = ((oarr->capacity - 1)/INDEX_CAPACITY) + 1;
+ struct sindex **new_indices;
#else /* OBJC_SPARSE2 */
- size_t num_indices = ((oarr->capacity-1)/BUCKET_SIZE)+1;
- struct sbucket ** new_buckets;
+ size_t num_indices = ((oarr->capacity - 1)/BUCKET_SIZE) + 1;
+ struct sbucket **new_buckets;
#endif
/* Allocate core array */
- arr = (struct sarray*) objc_malloc(sizeof(struct sarray)); /* !!! */
+ arr = (struct sarray *) objc_malloc (sizeof (struct sarray)); /* !!! */
arr->version.version = oarr->version.version + 1;
#ifdef OBJC_SPARSE3
arr->empty_index = oarr->empty_index;
#ifdef OBJC_SPARSE3
/* Copy bucket table */
- new_indices = (struct sindex**)
- objc_malloc(sizeof(struct sindex*)*num_indices);
- memcpy( new_indices,oarr->indices,
- sizeof(struct sindex*)*num_indices);
+ new_indices = (struct sindex **)
+ objc_malloc (sizeof (struct sindex *) * num_indices);
+ memcpy (new_indices, oarr->indices, sizeof (struct sindex *) * num_indices);
arr->indices = new_indices;
#else
/* Copy bucket table */
- new_buckets = (struct sbucket**)
- objc_malloc(sizeof(struct sbucket*)*num_indices);
- memcpy( new_buckets,oarr->buckets,
- sizeof(struct sbucket*)*num_indices);
+ new_buckets = (struct sbucket **)
+ objc_malloc (sizeof (struct sbucket *) * num_indices);
+ memcpy (new_buckets, oarr->buckets, sizeof (struct sbucket *) * num_indices);
arr->buckets = new_buckets;
#endif
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