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added an union in the dict.h structure to store 64 bit integers directly into hash table entries.

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This commit is contained in:
antirez 2011-11-02 15:28:45 +01:00
parent ef23f3ac92
commit 6a7841eb09
2 changed files with 12 additions and 7 deletions
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3
src/dict.c
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@ -270,7 +270,7 @@ int dictAdd(dict *d, void *key, void *val)
if ((index = _dictKeyIndex(d, key)) == -1)
return DICT_ERR;
/* Allocates the memory and stores key */
/* Allocate the memory and store the new entry */
ht = dictIsRehashing(d) ? &d->ht[1] : &d->ht[0];
entry = zmalloc(sizeof(*entry));
entry->next = ht->table[index];
@ -297,7 +297,6 @@ int dictReplace(dict *d, void *key, void *val)
return 1;
/* It already exists, get the entry */
entry = dictFind(d, key);
/* Free the old value and set the new one */
/* Set the new value and free the old one. Note that it is important
* to do that in this order, as the value may just be exactly the same
* as the previous one. In this context, think to reference counting,

16
src/dict.h
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@ -33,6 +33,8 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdint.h>
#ifndef __DICT_H
#define __DICT_H
@ -44,7 +46,11 @@
typedef struct dictEntry {
void *key;
void *val;
union {
void *val;
uint64_t u64;
int64_t i64;
} v;
struct dictEntry *next;
} dictEntry;
@ -90,13 +96,13 @@ typedef struct dictIterator {
/* ------------------------------- Macros ------------------------------------*/
#define dictFreeEntryVal(d, entry) \
if ((d)->type->valDestructor) \
(d)->type->valDestructor((d)->privdata, (entry)->val)
(d)->type->valDestructor((d)->privdata, (entry)->v.val)
#define dictSetHashVal(d, entry, _val_) do { \
if ((d)->type->valDup) \
entry->val = (d)->type->valDup((d)->privdata, _val_); \
entry->v.val = (d)->type->valDup((d)->privdata, _val_); \
else \
entry->val = (_val_); \
entry->v.val = (_val_); \
} while(0)
#define dictFreeEntryKey(d, entry) \
@ -118,7 +124,7 @@ typedef struct dictIterator {
#define dictHashKey(d, key) (d)->type->hashFunction(key)
#define dictGetEntryKey(he) ((he)->key)
#define dictGetEntryVal(he) ((he)->val)
#define dictGetEntryVal(he) ((he)->v.val)
#define dictSlots(d) ((d)->ht[0].size+(d)->ht[1].size)
#define dictSize(d) ((d)->ht[0].used+(d)->ht[1].used)
#define dictIsRehashing(ht) ((ht)->rehashidx != -1)