static void _hash_enter(struct hash_header *ht, int key, void *data)
{ /* precondition: there is no entry for <key> yet */
struct hash_link *temp;
int i;
if (DEBUG>1234) vlog(LOG_DEBUG,"_hash_enter");
temp = (void*)malloc(sizeof(struct hash_link));
temp->key = key;
temp->next = ht->buckets[HASH_KEY(ht,key)];
temp->data = data;
ht->buckets[HASH_KEY(ht,key)] = temp;
if (ht->klistlen >= ht->klistsize) {
ht->keylist = (void*)realloc(ht->keylist,sizeof(key_type)*
(ht->klistsize*=2));
}
if (ht->klistlen==0) ht->keylist[0]=key;
else
for (i=ht->klistlen; i>=0; i--) {
if (ht->keylist[i-1]<key) {
ht->keylist[i] = key;
break;
}
ht->keylist[i] = ht->keylist[i-1];
}
ht->klistlen++;
}
void _hash_enter(struct hash_header *ht,int key,void *data)
{
/* precondition: there is no entry for <key> yet */
struct hash_link *temp;
int i;
temp = (struct hash_link *)malloc(sizeof(struct hash_link));
temp->key = key;
temp->next = ht->buckets[HASH_KEY(ht,key)];
temp->data = data;
ht->buckets[HASH_KEY(ht,key)] = temp;
if(ht->klistlen>=ht->klistsize)
{
ht->keylist = (void*)realloc(ht->keylist,sizeof(*ht->keylist)*
(ht->klistsize*=2));
}
for(i=ht->klistlen;i>=0;i--)
{
if(ht->keylist[i-1]<key)
{
ht->keylist[i] = key;
break;
}
ht->keylist[i] = ht->keylist[i-1];
}
ht->klistlen++;
}
void _hash_enter( HASH_HEADER *ht, int key, void *data )
{
/* precondition: there is no entry for <key> yet */
HASH_LINK *temp;
int i;
temp = (HASH_LINK *) malloc( sizeof( HASH_LINK ) );
temp->key = key;
temp->next = ht->buckets[HASH_KEY( ht, key )];
temp->data = data;
ht->buckets[HASH_KEY( ht, key )] = temp;
if ( ht->klistlen >= ht->klistsize )
{
ht->keylist = (void *) realloc( ht->keylist, sizeof( *ht->keylist ) *
( ht->klistsize *= 2 ) );
}
for ( i = ht->klistlen; i >= 0; i-- )
{
if ( i == 0 || (ht->keylist[i - 1] < key) )
{
ht->keylist[i] = key;
break;
}
ht->keylist[i] = ht->keylist[i - 1];
}
ht->klistlen++;
return;
}
size_t hash_set(hash_t *const hash, char const *const key) {
size_t const x = hashfunc(hash, key);
if(HASH_NOTFOUND == x) return x;
size_t i = x;
for(;;) {
char const *const k = HASH_KEY(hash, i);
if(0 == nulcmp(k, hash->keylen)) break;
if(0 == memcmp(k, key, hash->keylen)) return i;
i = (i + 1) % hash->count;
if(x == i) return HASH_NOTFOUND;
}
memcpy(HASH_KEY(hash, i), key, hash->keylen);
return i;
}
static void evict_lower_half (log_t *log)
{
ptrdiff_t size = ASIZE (log->key_and_value) / 2;
EMACS_INT median = approximate_median (log, 0, size);
ptrdiff_t i;
for (i = 0; i < size; i++)
/* Evict not only values smaller but also values equal to the median,
so as to make sure we evict something no matter what. */
if (XINT (HASH_VALUE (log, i)) <= median)
{
Lisp_Object key = HASH_KEY (log, i);
{ /* FIXME: we could make this more efficient. */
Lisp_Object tmp;
XSET_HASH_TABLE (tmp, log); /* FIXME: Use make_lisp_ptr. */
Fremhash (key, tmp);
}
eassert (EQ (log->next_free, make_number (i)));
{
int j;
eassert (VECTORP (key));
for (j = 0; j < ASIZE (key); j++)
ASET (key, j, Qnil);
}
set_hash_key_slot (log, i, key);
}
}
size_t hash_del_internal(hash_t *const hash, size_t const x) {
if(x >= hash->count) return 0;
size_t i = x;
for(;;) {
size_t const next = (i + 1) % hash->count;
if(x == next) break;
char const *const k = HASH_KEY(hash, next);
if(0 == nulcmp(k, hash->keylen)) break;
size_t const alt = hashfunc(hash, k);
if(next == alt) break;
memcpy(HASH_KEY(hash, i), k, hash->keylen);
i = next;
}
memset(HASH_KEY(hash, i), 0, hash->keylen);
return (hash->count + i - x) % hash->count;
}
void *hash_remove(struct hash_header *ht,int key)
{
struct hash_link **scan;
scan = ht->buckets+HASH_KEY(ht,key);
while(*scan && (*scan)->key!=key)
scan = &(*scan)->next;
if(*scan)
{
int i;
struct hash_link *temp, *aux;
temp = (*scan)->data;
aux = *scan;
*scan = aux->next;
free(aux);
for(i=0;i<ht->klistlen;i++)
if(ht->keylist[i]==key)
break;
if(i<ht->klistlen)
{
bcopy((char *)ht->keylist+i+1,(char *)ht->keylist+i,(ht->klistlen-i)
*sizeof(*ht->keylist));
ht->klistlen--;
}
return temp;
}
return NULL;
}
void* hash_table_lookup_uint_key(hash_table htable, uint32_t key)
{
hash_table_node** table = htable.table;
uint32_t size = htable.size;
uint32_t size_mask = htable.size_mask;
uint32_t hash = HASH_KEY(key);
uint32_t slot = hash & size_mask;
uint32_t i = 0;
void* item_ptr = NULL;
while (i < size)
{
hash_table_node* node = table[slot];
if (node != NULL && node->uint_key == key)
{
item_ptr = node->item;
break;
}
++i;
slot = (slot + 1) & size_mask;
}
return item_ptr;
}
static void
record_backtrace (log_t *log, EMACS_INT count)
{
Lisp_Object backtrace;
ptrdiff_t index;
if (!INTEGERP (log->next_free))
/* FIXME: transfer the evicted counts to a special entry rather
than dropping them on the floor. */
evict_lower_half (log);
index = XINT (log->next_free);
/* Get a "working memory" vector. */
backtrace = HASH_KEY (log, index);
get_backtrace (backtrace);
{ /* We basically do a `gethash+puthash' here, except that we have to be
careful to avoid memory allocation since we're in a signal
handler, and we optimize the code to try and avoid computing the
hash+lookup twice. See fns.c:Fputhash for reference. */
EMACS_UINT hash;
ptrdiff_t j = hash_lookup (log, backtrace, &hash);
if (j >= 0)
{
EMACS_INT old_val = XINT (HASH_VALUE (log, j));
EMACS_INT new_val = saturated_add (old_val, count);
set_hash_value_slot (log, j, make_number (new_val));
}
else
{ /* BEWARE! hash_put in general can allocate memory.
But currently it only does that if log->next_free is nil. */
int j;
eassert (!NILP (log->next_free));
j = hash_put (log, backtrace, make_number (count), hash);
/* Let's make sure we've put `backtrace' right where it
already was to start with. */
eassert (index == j);
/* FIXME: If the hash-table is almost full, we should set
some global flag so that some Elisp code can offload its
data elsewhere, so as to avoid the eviction code.
There are 2 ways to do that, AFAICT:
- Set a flag checked in QUIT, such that QUIT can then call
Fprofiler_cpu_log and stash the full log for later use.
- Set a flag check in post-gc-hook, so that Elisp code can call
profiler-cpu-log. That gives us more flexibility since that
Elisp code can then do all kinds of fun stuff like write
the log to disk. Or turn it right away into a call tree.
Of course, using Elisp is generally preferable, but it may
take longer until we get a chance to run the Elisp code, so
there's more risk that the table will get full before we
get there. */
}
}
}
void *hash_find( HASH_HEADER *ht, int key )
{
HASH_LINK *scan;
scan = ht->buckets[HASH_KEY( ht, key )];
while ( scan && scan->key != key )
scan = scan->next;
return scan ? scan->data : NULL;
}
void *hash_find(struct hash_header *ht,int key)
{
struct hash_link *scan;
scan = ht->buckets[HASH_KEY(ht,key)];
while(scan && scan->key!=key)
scan = scan->next;
return scan ? scan->data : NULL;
}
VOID
CmpRemoveKeyHash(
IN PCM_KEY_HASH KeyHash
)
/*++
Routine Description:
Removes a key hash structure from the hash table.
Arguments:
KeyHash - Supplies the key hash structure to be deleted.
Return Value:
None
--*/
{
HASH_VALUE Hash;
ULONG Index;
PCM_KEY_HASH *Prev;
PCM_KEY_HASH Current;
ASSERT_KEY_HASH(KeyHash);
Hash = HASH_KEY(KeyHash->ConvKey);
Index = Hash % CmpHashTableSize;
//
// Find this entry.
//
Prev = &CmpCacheTable[Index];
while (TRUE) {
Current = *Prev;
ASSERT(Current != NULL);
ASSERT_KEY_HASH(Current);
if (Current == KeyHash) {
*Prev = Current->NextHash;
#if DBG
if (*Prev) {
ASSERT_KEY_HASH(*Prev);
}
#endif
break;
}
Prev = &Current->NextHash;
}
}
bool hash_table_insert_uint_key(hash_table htable, void* item, uint32_t key)
{
hash_table_node** table = htable.table;
uint32_t size = htable.size;
uint32_t size_mask = htable.size_mask;
uint32_t hash = HASH_KEY(key);
uint32_t slot = hash & size_mask;
uint32_t i;
hash_table_node* node_ptr = NULL;
bool update_current_node = false;
bool is_insertion_successful = false;
for (i = 0; i < size; ++i)
{
node_ptr = table[slot];
if (node_ptr == NULL)
{
break;
}
else if (node_ptr->uint_key == key)
{
update_current_node = true;
break;
}
slot = (slot + 1) & size_mask;
}
if (i < size)
{
if (update_current_node == true)
{
node_ptr->item = item;
}
else
{
node_ptr = malloc(HASH_TABLE_NODE_SIZE);
hash_table_node node = { item, uint_key_type, key, 0, hash };
*node_ptr = node;
table[slot] = node_ptr;
}
is_insertion_successful = true;
}
return is_insertion_successful;
}
hash_t *obj_init_typemap(
ualloc_t *ua,
err_t *out_err)
{
err_t x = ERROR_NONE;
hash_t *typemap = NULL;
hash_t *namemap = NULL;
hash_t *isamap = NULL;
x = HASH_CREATE_SIMPLE(ua,HASH_F_INTKEY,&typemap);
if (x)
goto DONE;
x = HASH_CREATE_SIMPLE(ua,HASH_F_COPYVAL,&namemap);
if (x)
goto DONE;
x = HASH_CREATE_SIMPLE(ua,HASH_F_INTKEY,&isamap);
if (x)
goto DONE;
x = hash_add(typemap, HASH_KEY(_INTERNAL_MN_KEY), HASH_VAL(namemap));
if (x)
goto DONE;
x = hash_add(typemap, HASH_KEY(_INTERNAL_ISA_KEY), HASH_VAL(isamap));
DEATH:
if (x) {
if (isamap)
(void) hash_destroy(isamap);
if (namemap)
(void) hash_destroy(namemap);
if (typemap)
(void) hash_destroy(typemap);
typemap = NULL;
}
if (out_err)
*out_err = x;
return typemap;
}
// old public method
static inline void *qt_hash_get(qt_hash h,
const qt_key_t key)
{
size_t bucket;
uint64_t lkey = (uint64_t)(uintptr_t)(h->op_hash(key));
HASH_KEY(lkey);
bucket = lkey % h->size;
if (h->B[bucket] == UNINITIALIZED) {
// You'd think returning NULL at this point would be a good idea; but
// if we do that, we risk losing key/value pairs (incorrectly reporting
// them as absent) when the hash table resizes
initialize_bucket(h, bucket);
}
return qt_lf_list_find(&(h->B[bucket]), so_regularkey(lkey), key, NULL, NULL, NULL, h->op_equals);
}
// old public method
static inline int qt_hash_remove(qt_hash h,
const qt_key_t key)
{
size_t bucket;
uint64_t lkey = (uint64_t)(uintptr_t)(h->op_hash(key));
HASH_KEY(lkey);
bucket = lkey % h->size;
if (h->B[bucket] == UNINITIALIZED) {
initialize_bucket(h, bucket);
}
if (!qt_lf_list_delete(&(h->B[bucket]), so_regularkey(lkey), key, h->op_equals, h->op_cleanup)) {
return 0;
}
qthread_incr(&h->count, -1);
return 1;
}
void *qt_dictionary_get(qt_dictionary *h,
const qt_key_t key)
{
uint64_t lkey = (uint64_t)(uintptr_t)(h->op_hash(key));
HASH_KEY(lkey);
assert(h);
unsigned bucket = BASE_SPINE_BUCKET(lkey);
// spine_element_t *child_id = &(h->base[bucket]);
spine_element_t child_val = h->base[bucket];
// spine_element_t *cur_id = NULL;
spine_t *cur_spine = NULL;
unsigned depth = 0;
do {
if (child_val.e == NULL) {
// not found
return NULL;
} else if (SPINE_PTR_TEST(child_val)) {
// cur_id = child_id;
cur_spine = SPINE_PTR(h, child_val);
depth++;
assert(depth <= 11); // otherwise, something has gone horribly wrong
bucket = SPINE_BUCKET(lkey, depth);
// child_id = &cur_spine->elements[bucket];
child_val = cur_spine->elements[bucket];
} else {
// check that key == element->hashed_key
if (child_val.e->hashed_key == lkey) {
hash_entry *e = child_val.e;
while(e) {
if (h->op_equals(e->key, key)) {
return e->value;
}
e = e->next;
}
return NULL;
} else {
return NULL;
}
}
} while (1);
}
bool hash_table_remove_uint_key(hash_table htable, uint32_t key)
{
hash_table_node** table = htable.table;
uint32_t size = htable.size;
uint32_t size_mask = htable.size_mask;
uint32_t hash = HASH_KEY(key);
uint32_t index = hash & size_mask;
bool is_removal_successful = false;
hash_table_node* found_node = table[index];
if (found_node != NULL && found_node->uint_key == key)
{
free(found_node);
table[index] = NULL;
is_removal_successful = true;
}
return is_removal_successful;
}
// old public method; added last param to distinguish between put and put if absent
static inline hash_entry *qt_hash_put(qt_hash h,
qt_key_t key,
void *value,
int put_choice)
{
hash_entry *node = qpool_alloc(hash_entry_pool);
hash_entry *ret = node;
size_t bucket;
uint64_t lkey = (uint64_t)(uintptr_t)(h->op_hash(key));
HASH_KEY(lkey);
bucket = lkey % h->size;
assert(node);
assert((lkey & MSB) == 0);
node->hashed_key = so_regularkey(lkey);
node->key = key; // Also store original key!
node->value = value;
node->next = (hash_entry*)UNINITIALIZED;
if (h->B[bucket] == UNINITIALIZED) {
initialize_bucket(h, bucket);
}
if(put_choice == PUT_IF_ABSENT) {
if (!qt_lf_list_insert(&(h->B[bucket]), node, NULL, &ret, h->op_equals)) {
qpool_free(hash_entry_pool, node);
return ret->value;
}
} else {
qt_lf_force_list_insert(&(h->B[bucket]), node, h->op_equals);
}
size_t csize = h->size;
if (qthread_incr(&h->count, 1) / csize > MAX_LOAD) {
if (2 * csize <= hard_max_buckets) { // this caps the size of the hash
qthread_cas(&h->size, csize, 2 * csize);
}
}
return ret->value;
}
static Lisp_Object
hash_get_category_set (Lisp_Object table, Lisp_Object category_set)
{
Lisp_Object val;
struct Lisp_Hash_Table *h;
int i;
unsigned hash;
if (NILP (XCHAR_TABLE (table)->extras[1]))
XCHAR_TABLE (table)->extras[1]
= make_hash_table (Qequal, make_number (DEFAULT_HASH_SIZE),
make_float (DEFAULT_REHASH_SIZE),
make_float (DEFAULT_REHASH_THRESHOLD),
Qnil, Qnil, Qnil);
h = XHASH_TABLE (XCHAR_TABLE (table)->extras[1]);
i = hash_lookup (h, category_set, &hash);
if (i >= 0)
return HASH_KEY (h, i);
hash_put (h, category_set, Qnil, hash);
return category_set;
}
static Lisp_Object
hash_get_category_set (Lisp_Object table, Lisp_Object category_set)
{
struct Lisp_Hash_Table *h;
ptrdiff_t i;
EMACS_UINT hash;
if (NILP (XCHAR_TABLE (table)->extras[1]))
set_char_table_extras
(table, 1,
make_hash_table (hashtest_equal, make_number (DEFAULT_HASH_SIZE),
make_float (DEFAULT_REHASH_SIZE),
make_float (DEFAULT_REHASH_THRESHOLD),
Qnil));
h = XHASH_TABLE (XCHAR_TABLE (table)->extras[1]);
i = hash_lookup (h, category_set, &hash);
if (i >= 0)
return HASH_KEY (h, i);
hash_put (h, category_set, Qnil, hash);
return category_set;
}
void *hash_remove( HASH_HEADER *ht, int key )
{
HASH_LINK **scan;
scan = ht->buckets + HASH_KEY( ht, key );
while ( *scan && ( *scan )->key != key )
scan = &( *scan )->next;
if ( *scan )
{
HASH_LINK *temp;
HASH_LINK *aux;
int i;
temp = ( *scan )->data;
aux = *scan;
*scan = aux->next;
free( aux );
for ( i = 0; i < ht->klistlen; i++ )
if ( ht->keylist[i] == key )
break;
if ( i < ht->klistlen )
{
memmove( ht->keylist + i, ht->keylist + i + 1, ( ht->klistlen - i )
* sizeof( *ht->keylist ) );
ht->klistlen--;
}
return temp;
}
return NULL;
}
}
char *obj_register_class_in(
hash_t *typemap,
void *class,
void *parent,
char *name,
err_t *out_err)
{
err_t x = ERROR_NONE;
hash_val_t val;
hash_t *namemap = NULL;
hash_t *isamap = NULL;
char *result = NULL;
x = hash_lookup(typemap, HASH_KEY(_INTERNAL_NM_KEY), &val);
if (x)
goto DONE;
namemap = (hash_t *)val;
if (!namemap) {
x = ERROR_NULL_VAL;
goto DONE;
}
x = hash_lookup(typemap, HASH_KEY(_INTERNAL_ISA_KEY), &val);
if (x)
goto DONE;
isamap = (hash_t *)val;
if (!isamap) {
x = ERROR_NULL_VAL;
goto DONE;
}
static json_t *
lisp_to_json_toplevel_1 (Lisp_Object lisp)
{
json_t *json;
ptrdiff_t count;
if (VECTORP (lisp))
{
ptrdiff_t size = ASIZE (lisp);
json = json_check (json_array ());
count = SPECPDL_INDEX ();
record_unwind_protect_ptr (json_release_object, json);
for (ptrdiff_t i = 0; i < size; ++i)
{
int status
= json_array_append_new (json, lisp_to_json (AREF (lisp, i)));
if (status == -1)
json_out_of_memory ();
}
eassert (json_array_size (json) == size);
}
else if (HASH_TABLE_P (lisp))
{
struct Lisp_Hash_Table *h = XHASH_TABLE (lisp);
json = json_check (json_object ());
count = SPECPDL_INDEX ();
record_unwind_protect_ptr (json_release_object, json);
for (ptrdiff_t i = 0; i < HASH_TABLE_SIZE (h); ++i)
if (!NILP (HASH_HASH (h, i)))
{
Lisp_Object key = json_encode (HASH_KEY (h, i));
/* We can't specify the length, so the string must be
null-terminated. */
check_string_without_embedded_nulls (key);
const char *key_str = SSDATA (key);
/* Reject duplicate keys. These are possible if the hash
table test is not `equal'. */
if (json_object_get (json, key_str) != NULL)
wrong_type_argument (Qjson_value_p, lisp);
int status = json_object_set_new (json, key_str,
lisp_to_json (HASH_VALUE (h, i)));
if (status == -1)
{
/* A failure can be caused either by an invalid key or
by low memory. */
json_check_utf8 (key);
json_out_of_memory ();
}
}
}
else if (NILP (lisp))
return json_check (json_object ());
else if (CONSP (lisp))
{
Lisp_Object tail = lisp;
json = json_check (json_object ());
count = SPECPDL_INDEX ();
record_unwind_protect_ptr (json_release_object, json);
bool is_plist = !CONSP (XCAR (tail));
FOR_EACH_TAIL (tail)
{
const char *key_str;
Lisp_Object value;
Lisp_Object key_symbol;
if (is_plist)
{
key_symbol = XCAR (tail);
tail = XCDR (tail);
CHECK_CONS (tail);
value = XCAR (tail);
if (EQ (tail, li.tortoise)) circular_list (lisp);
}
else
{
Lisp_Object pair = XCAR (tail);
CHECK_CONS (pair);
key_symbol = XCAR (pair);
value = XCDR (pair);
}
CHECK_SYMBOL (key_symbol);
Lisp_Object key = SYMBOL_NAME (key_symbol);
/* We can't specify the length, so the string must be
null-terminated. */
check_string_without_embedded_nulls (key);
key_str = SSDATA (key);
/* In plists, ensure leading ":" in keys is stripped. It
will be reconstructed later in `json_to_lisp'.*/
if (is_plist && ':' == key_str[0] && key_str[1])
{
key_str = &key_str[1];
}
/* Only add element if key is not already present. */
if (json_object_get (json, key_str) == NULL)
{
int status
= json_object_set_new (json, key_str, lisp_to_json (value));
if (status == -1)
json_out_of_memory ();
}
}
CHECK_LIST_END (tail, lisp);
}
else
void *qt_hash_put_helper(qt_dictionary *h,
qt_key_t key,
void *value,
int put_choice)
{
uint64_t lkey = (uint64_t)(uintptr_t)(h->op_hash(key));
HASH_KEY(lkey);
assert(h);
unsigned bucket = BASE_SPINE_BUCKET(lkey);
hash_entry *e = qt_malloc(sizeof(hash_entry)); // XXX: should be from a memory pool
spine_element_t *child_id = &(h->base[bucket]);
spine_element_t child_val = h->base[bucket];
spine_element_t *cur_id = NULL;
spine_t *cur_spine = NULL;
unsigned depth = 0;
assert(e != NULL);
e->hashed_key = lkey;
e->key = key;
e->value = value;
e->next = NULL;
hash_entry *crt;
do {
if (child_val.e == NULL) {
// place the entry in the hash
if ((child_val.e = CAS(&(child_id->e), NULL, e)) == NULL) {
// put success: no potential colliding element was present
return value;
}
} else if (SPINE_PTR_TEST(child_val)) {
INCREMENT_COUNT(child_id, child_val);
if (cur_id) {
DECREMENT_COUNT(cur_id);
}
cur_id = child_id;
cur_spine = SPINE_PTR(h, child_val);
depth++;
assert(depth <= 11); // otherwise, something has gone horribly wrong
bucket = SPINE_BUCKET(lkey, depth);
child_id = &cur_spine->elements[bucket];
child_val = cur_spine->elements[bucket];
} else if (child_val.e->hashed_key != lkey) {
// upgrade to a spine
spine_element_t newspine, cur;
spine_t *realspine;
unsigned bucket1 = SPINE_BUCKET(child_val.e->hashed_key, depth + 1);
unsigned bucket2 = SPINE_BUCKET(lkey, depth + 1);
newspine.s.id = allocate_spine(h, &realspine);
realspine->parent = cur_id;
realspine->elements[bucket1] = child_val;
if (bucket1 != bucket2) { // both elements will be in the new spine
newspine.s.ctr = SPINE_COUNT(2); // contains 2 elements
realspine->elements[bucket2].e = e;
if ((cur.e = CAS(&(child_id->e), child_val.e, newspine.e)) == child_val.e) {
// success!
if (cur_id) {
DECREMENT_COUNT(cur_id);
}
return value;
} else {
child_val = cur;
deallocate_spine(h, newspine.s.id);
}
} else { // collision in the new spine (unusual; will use unnecessary CAS)
newspine.s.ctr = SPINE_COUNT(1); // contains 1 element (oldval)
if ((cur.e = CAS(&(child_id->e), child_val.e, newspine.e)) == child_val.e) {
// success
continue;
} else {
child_val = cur;
deallocate_spine(h, newspine.s.id);
}
}
} else {
// use the real user-equals operation to differentiate subcases
// it is possible that the element is there or it may not be there
hash_entry *head;
do {
head = child_id->e;
e->next = head;
crt = head;
// find the entry, if it is in the list
while (crt) {
if (h->op_equals(crt->key, key)) {
// already exists
if (put_choice != PUT_IF_ABSENT) {
void **crt_val_adr = &(crt->value);
void *crt_val = crt->value;
while((qthread_cas_ptr(crt_val_adr, \
crt_val, value)) != crt_val ) {
crt_val = crt->value;
}
}
if (cur_id) { DECREMENT_COUNT(cur_id); }
return crt->value;
}
crt = crt->next;
}
// and try to insert it at the head of the list;
// if the list changed, redu the work
} while (qthread_cas_ptr(&(child_id->e), head, e) != head);
// printf("IN put: (%s-%s)\n", child_id->e->key, child_id->e->value);
// if (e->next !=NULL)
// printf("next key is %s and value %s\n", e->next->key, e->next->value);
return e->value;
}
} while (1);
}
int qt_dictionary_remove(qt_dictionary *h,
const qt_key_t key)
{
uint64_t lkey = (uint64_t)(uintptr_t)(h->op_hash(key));
HASH_KEY(lkey);
HASH_KEY(lkey);
assert(h);
unsigned bucket = BASE_SPINE_BUCKET(lkey);
spine_element_t *child_id = &(h->base[bucket]);
spine_element_t child_val = h->base[bucket];
spine_element_t *cur_id = NULL;
spine_t *cur_spine = NULL;
unsigned depth = 0;
// First, find and remove the item itself
do {
if (child_val.e == NULL) {
// not found
return 0;
} else if (SPINE_PTR_TEST(child_val)) {
cur_id = child_id;
cur_spine = SPINE_PTR(h, child_val);
depth++;
assert(depth <= 11); // otherwise, something has gone horribly wrong
bucket = SPINE_BUCKET(lkey, depth);
child_id = &cur_spine->elements[bucket];
child_val = cur_spine->elements[bucket];
} else if (child_val.e->hashed_key == lkey) {
hash_entry *e = child_id->e;
hash_entry **prev = &(child_id->e);
do {
if (h->op_equals(e->key, key)) {
spine_element_t cur;
if ((cur.e = CAS(prev, e, e->next)) == e) {
if (h->op_cleanup != NULL) {
h->op_cleanup(child_val.e->key, NULL);
}
qt_free(child_val.e); // XXX should be into a mempool
// Second, walk back up the parent pointers, removing empty spines (if any)
// cur_id is the current spine pointer's location (if its null, we're in the base spine)
while (cur_id) {
spine_element_t oldval = *cur_id;
spine_element_t newcount;
spine_element_t tmp = oldval;
uint32_t count;
do {
oldval = tmp;
count = SPINE_PTR_COUNT(oldval) - 1;
if (count == 0) {
newcount.e = NULL;
} else {
newcount.s.id = oldval.s.id;
newcount.s.ctr = SPINE_COUNT(count);
}
tmp.u = CAS(&(cur_id->u), oldval.u, newcount.u);
} while (tmp.u != oldval.u);
if (count == 0) {
spine_t *s = SPINE_PTR(h, oldval);
assert(s);
cur_id = s->parent;
deallocate_spine(h, oldval.s.id);
} else {
break;
}
}
INCR(&(h->count), -1);
return 1;
} else {}
}
prev = &(e->next);
e = e->next;
} while(e != NULL);
return 0;
} else {
return 0;
}
} while (1);
}