#include "lzf.h" /* LZF compression library */
#include "pqsort.h" /* Partial qsort for SORT+LIMIT */
#include "zipmap.h" /* Compact dictionary-alike data structure */
+#include "ziplist.h" /* Compact list data structure */
#include "sha1.h" /* SHA1 is used for DEBUG DIGEST */
#include "release.h" /* Release and/or git repository information */
/* Objects encoding. Some kind of objects like Strings and Hashes can be
* internally represented in multiple ways. The 'encoding' field of the object
* is set to one of this fields for this object. */
-#define REDIS_ENCODING_RAW 0 /* Raw representation */
-#define REDIS_ENCODING_INT 1 /* Encoded as integer */
-#define REDIS_ENCODING_ZIPMAP 2 /* Encoded as zipmap */
-#define REDIS_ENCODING_HT 3 /* Encoded as an hash table */
+#define REDIS_ENCODING_RAW 0 /* Raw representation */
+#define REDIS_ENCODING_INT 1 /* Encoded as integer */
+#define REDIS_ENCODING_HT 2 /* Encoded as hash table */
+#define REDIS_ENCODING_ZIPMAP 3 /* Encoded as zipmap */
+#define REDIS_ENCODING_LIST 4 /* Encoded as zipmap */
+#define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
static char* strencoding[] = {
- "raw", "int", "zipmap", "hashtable"
+ "raw", "int", "hashtable", "zipmap", "list", "ziplist"
};
/* Object types only used for dumping to disk */
#define APPENDFSYNC_ALWAYS 1
#define APPENDFSYNC_EVERYSEC 2
-/* Hashes related defaults */
+/* Zip structure related defaults */
#define REDIS_HASH_MAX_ZIPMAP_ENTRIES 64
#define REDIS_HASH_MAX_ZIPMAP_VALUE 512
+#define REDIS_LIST_MAX_ZIPLIST_ENTRIES 1024
+#define REDIS_LIST_MAX_ZIPLIST_VALUE 32
/* We can print the stacktrace, so our assert is defined this way: */
#define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
off_t vm_page_size;
off_t vm_pages;
unsigned long long vm_max_memory;
- /* Hashes config */
+ /* Zip structure config */
size_t hash_max_zipmap_entries;
size_t hash_max_zipmap_value;
+ size_t list_max_ziplist_entries;
+ size_t list_max_ziplist_value;
/* Virtual memory state */
FILE *vm_fp;
int vm_fd;
static void call(redisClient *c, struct redisCommand *cmd);
static void resetClient(redisClient *c);
static void convertToRealHash(robj *o);
+static void listTypeConvert(robj *o, int enc);
static int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
static int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
static void freePubsubPattern(void *p);
server.vm_blocked_clients = 0;
server.hash_max_zipmap_entries = REDIS_HASH_MAX_ZIPMAP_ENTRIES;
server.hash_max_zipmap_value = REDIS_HASH_MAX_ZIPMAP_VALUE;
+ server.list_max_ziplist_entries = REDIS_LIST_MAX_ZIPLIST_ENTRIES;
+ server.list_max_ziplist_value = REDIS_LIST_MAX_ZIPLIST_VALUE;
server.shutdown_asap = 0;
resetServerSaveParams();
server.hash_max_zipmap_entries = memtoll(argv[1], NULL);
} else if (!strcasecmp(argv[0],"hash-max-zipmap-value") && argc == 2){
server.hash_max_zipmap_value = memtoll(argv[1], NULL);
+ } else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
+ server.list_max_ziplist_entries = memtoll(argv[1], NULL);
+ } else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2){
+ server.list_max_ziplist_value = memtoll(argv[1], NULL);
} else {
err = "Bad directive or wrong number of arguments"; goto loaderr;
}
static robj *createListObject(void) {
list *l = listCreate();
-
+ robj *o = createObject(REDIS_LIST,l);
listSetFreeMethod(l,decrRefCount);
- return createObject(REDIS_LIST,l);
+ o->encoding = REDIS_ENCODING_LIST;
+ return o;
+}
+
+static robj *createZiplistObject(void) {
+ unsigned char *zl = ziplistNew();
+ robj *o = createObject(REDIS_LIST,zl);
+ o->encoding = REDIS_ENCODING_ZIPLIST;
+ return o;
}
static robj *createSetObject(void) {
}
static void freeListObject(robj *o) {
- listRelease((list*) o->ptr);
+ switch (o->encoding) {
+ case REDIS_ENCODING_LIST:
+ listRelease((list*) o->ptr);
+ break;
+ case REDIS_ENCODING_ZIPLIST:
+ zfree(o->ptr);
+ break;
+ default:
+ redisPanic("Unknown list encoding type");
+ }
}
static void freeSetObject(robj *o) {
return 0;
}
+/* Save a long long value as either an encoded string or a string. */
+static int rdbSaveLongLongAsStringObject(FILE *fp, long long value) {
+ unsigned char buf[32];
+ int enclen = rdbEncodeInteger(value,buf);
+ if (enclen > 0) {
+ if (fwrite(buf,enclen,1,fp) == 0) return -1;
+ } else {
+ /* Encode as string */
+ enclen = ll2string((char*)buf,32,value);
+ redisAssert(enclen < 32);
+ if (rdbSaveLen(fp,enclen) == -1) return -1;
+ if (fwrite(buf,enclen,1,fp) == 0) return -1;
+ }
+ return 0;
+}
+
/* Like rdbSaveStringObjectRaw() but handle encoded objects */
static int rdbSaveStringObject(FILE *fp, robj *obj) {
- int retval;
-
/* Avoid to decode the object, then encode it again, if the
* object is alrady integer encoded. */
if (obj->encoding == REDIS_ENCODING_INT) {
- long val = (long) obj->ptr;
- unsigned char buf[5];
- int enclen;
-
- if ((enclen = rdbEncodeInteger(val,buf)) > 0) {
- if (fwrite(buf,enclen,1,fp) == 0) return -1;
- return 0;
- }
- /* otherwise... fall throught and continue with the usual
- * code path. */
- }
-
- /* Avoid incr/decr ref count business when possible.
- * This plays well with copy-on-write given that we are probably
- * in a child process (BGSAVE). Also this makes sure key objects
- * of swapped objects are not incRefCount-ed (an assert does not allow
- * this in order to avoid bugs) */
- if (obj->encoding != REDIS_ENCODING_RAW) {
- obj = getDecodedObject(obj);
- retval = rdbSaveRawString(fp,obj->ptr,sdslen(obj->ptr));
- decrRefCount(obj);
+ return rdbSaveLongLongAsStringObject(fp,(long)obj->ptr);
} else {
- retval = rdbSaveRawString(fp,obj->ptr,sdslen(obj->ptr));
+ redisAssert(obj->encoding == REDIS_ENCODING_RAW);
+ return rdbSaveRawString(fp,obj->ptr,sdslen(obj->ptr));
}
- return retval;
}
/* Save a double value. Doubles are saved as strings prefixed by an unsigned
if (rdbSaveStringObject(fp,o) == -1) return -1;
} else if (o->type == REDIS_LIST) {
/* Save a list value */
- list *list = o->ptr;
- listIter li;
- listNode *ln;
-
- if (rdbSaveLen(fp,listLength(list)) == -1) return -1;
- listRewind(list,&li);
- while((ln = listNext(&li))) {
- robj *eleobj = listNodeValue(ln);
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *p;
+ unsigned char *vstr;
+ unsigned int vlen;
+ long long vlong;
+
+ if (rdbSaveLen(fp,ziplistLen(o->ptr)) == -1) return -1;
+ p = ziplistIndex(o->ptr,0);
+ while(ziplistGet(p,&vstr,&vlen,&vlong)) {
+ if (vstr) {
+ if (rdbSaveRawString(fp,vstr,vlen) == -1)
+ return -1;
+ } else {
+ if (rdbSaveLongLongAsStringObject(fp,vlong) == -1)
+ return -1;
+ }
+ p = ziplistNext(o->ptr,p);
+ }
+ } else if (o->encoding == REDIS_ENCODING_LIST) {
+ list *list = o->ptr;
+ listIter li;
+ listNode *ln;
- if (rdbSaveStringObject(fp,eleobj) == -1) return -1;
+ if (rdbSaveLen(fp,listLength(list)) == -1) return -1;
+ listRewind(list,&li);
+ while((ln = listNext(&li))) {
+ robj *eleobj = listNodeValue(ln);
+ if (rdbSaveStringObject(fp,eleobj) == -1) return -1;
+ }
+ } else {
+ redisPanic("Unknown list encoding");
}
} else if (o->type == REDIS_SET) {
/* Save a set value */
/* Load a Redis object of the specified type from the specified file.
* On success a newly allocated object is returned, otherwise NULL. */
static robj *rdbLoadObject(int type, FILE *fp) {
- robj *o;
+ robj *o, *ele, *dec;
+ size_t len;
redisLog(REDIS_DEBUG,"LOADING OBJECT %d (at %d)\n",type,ftell(fp));
if (type == REDIS_STRING) {
/* Read string value */
if ((o = rdbLoadEncodedStringObject(fp)) == NULL) return NULL;
o = tryObjectEncoding(o);
- } else if (type == REDIS_LIST || type == REDIS_SET) {
- /* Read list/set value */
- uint32_t listlen;
+ } else if (type == REDIS_LIST) {
+ /* Read list value */
+ if ((len = rdbLoadLen(fp,NULL)) == REDIS_RDB_LENERR) return NULL;
- if ((listlen = rdbLoadLen(fp,NULL)) == REDIS_RDB_LENERR) return NULL;
- o = (type == REDIS_LIST) ? createListObject() : createSetObject();
+ /* Use a real list when there are too many entries */
+ if (len > server.list_max_ziplist_entries) {
+ o = createListObject();
+ } else {
+ o = createZiplistObject();
+ }
+
+ /* Load every single element of the list */
+ while(len--) {
+ if ((ele = rdbLoadEncodedStringObject(fp)) == NULL) return NULL;
+
+ /* If we are using a ziplist and the value is too big, convert
+ * the object to a real list. */
+ if (o->encoding == REDIS_ENCODING_ZIPLIST &&
+ ele->encoding == REDIS_ENCODING_RAW &&
+ sdslen(ele->ptr) > server.list_max_ziplist_value)
+ listTypeConvert(o,REDIS_ENCODING_LIST);
+
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ dec = getDecodedObject(ele);
+ o->ptr = ziplistPush(o->ptr,dec->ptr,sdslen(dec->ptr),REDIS_TAIL);
+ decrRefCount(dec);
+ decrRefCount(ele);
+ } else {
+ ele = tryObjectEncoding(ele);
+ listAddNodeTail(o->ptr,ele);
+ incrRefCount(ele);
+ }
+ }
+ } else if (type == REDIS_SET) {
+ /* Read list/set value */
+ if ((len = rdbLoadLen(fp,NULL)) == REDIS_RDB_LENERR) return NULL;
+ o = createSetObject();
/* It's faster to expand the dict to the right size asap in order
* to avoid rehashing */
- if (type == REDIS_SET && listlen > DICT_HT_INITIAL_SIZE)
- dictExpand(o->ptr,listlen);
+ if (len > DICT_HT_INITIAL_SIZE)
+ dictExpand(o->ptr,len);
/* Load every single element of the list/set */
- while(listlen--) {
- robj *ele;
-
+ while(len--) {
if ((ele = rdbLoadEncodedStringObject(fp)) == NULL) return NULL;
ele = tryObjectEncoding(ele);
- if (type == REDIS_LIST) {
- listAddNodeTail((list*)o->ptr,ele);
- } else {
- dictAdd((dict*)o->ptr,ele,NULL);
- }
+ dictAdd((dict*)o->ptr,ele,NULL);
}
} else if (type == REDIS_ZSET) {
/* Read list/set value */
}
/* =================================== Lists ================================ */
-static void pushGenericCommand(redisClient *c, int where) {
- robj *lobj;
- list *list;
- lobj = lookupKeyWrite(c->db,c->argv[1]);
+
+/* Check the argument length to see if it requires us to convert the ziplist
+ * to a real list. Only check raw-encoded objects because integer encoded
+ * objects are never too long. */
+static void listTypeTryConversion(robj *subject, robj *value) {
+ if (subject->encoding != REDIS_ENCODING_ZIPLIST) return;
+ if (value->encoding == REDIS_ENCODING_RAW &&
+ sdslen(value->ptr) > server.list_max_ziplist_value)
+ listTypeConvert(subject,REDIS_ENCODING_LIST);
+}
+
+static void listTypePush(robj *subject, robj *value, int where) {
+ /* Check if we need to convert the ziplist */
+ listTypeTryConversion(subject,value);
+ if (subject->encoding == REDIS_ENCODING_ZIPLIST &&
+ ziplistLen(subject->ptr) > server.list_max_ziplist_entries)
+ listTypeConvert(subject,REDIS_ENCODING_LIST);
+
+ if (subject->encoding == REDIS_ENCODING_ZIPLIST) {
+ int pos = (where == REDIS_HEAD) ? ZIPLIST_HEAD : ZIPLIST_TAIL;
+ value = getDecodedObject(value);
+ subject->ptr = ziplistPush(subject->ptr,value->ptr,sdslen(value->ptr),pos);
+ decrRefCount(value);
+ } else if (subject->encoding == REDIS_ENCODING_LIST) {
+ if (where == REDIS_HEAD) {
+ listAddNodeHead(subject->ptr,value);
+ } else {
+ listAddNodeTail(subject->ptr,value);
+ }
+ incrRefCount(value);
+ } else {
+ redisPanic("Unknown list encoding");
+ }
+}
+
+static robj *listTypePop(robj *subject, int where) {
+ robj *value = NULL;
+ if (subject->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *p;
+ unsigned char *vstr;
+ unsigned int vlen;
+ long long vlong;
+ int pos = (where == REDIS_HEAD) ? 0 : -1;
+ p = ziplistIndex(subject->ptr,pos);
+ if (ziplistGet(p,&vstr,&vlen,&vlong)) {
+ if (vstr) {
+ value = createStringObject((char*)vstr,vlen);
+ } else {
+ value = createStringObjectFromLongLong(vlong);
+ }
+ /* We only need to delete an element when it exists */
+ subject->ptr = ziplistDelete(subject->ptr,&p);
+ }
+ } else if (subject->encoding == REDIS_ENCODING_LIST) {
+ list *list = subject->ptr;
+ listNode *ln;
+ if (where == REDIS_HEAD) {
+ ln = listFirst(list);
+ } else {
+ ln = listLast(list);
+ }
+ if (ln != NULL) {
+ value = listNodeValue(ln);
+ incrRefCount(value);
+ listDelNode(list,ln);
+ }
+ } else {
+ redisPanic("Unknown list encoding");
+ }
+ return value;
+}
+
+static unsigned long listTypeLength(robj *subject) {
+ if (subject->encoding == REDIS_ENCODING_ZIPLIST) {
+ return ziplistLen(subject->ptr);
+ } else if (subject->encoding == REDIS_ENCODING_LIST) {
+ return listLength((list*)subject->ptr);
+ } else {
+ redisPanic("Unknown list encoding");
+ }
+}
+
+/* Structure to hold set iteration abstraction. */
+typedef struct {
+ robj *subject;
+ unsigned char encoding;
+ unsigned char direction; /* Iteration direction */
+ unsigned char *zi;
+ listNode *ln;
+} listTypeIterator;
+
+/* Structure for an entry while iterating over a list. */
+typedef struct {
+ listTypeIterator *li;
+ unsigned char *zi; /* Entry in ziplist */
+ listNode *ln; /* Entry in linked list */
+} listTypeEntry;
+
+/* Initialize an iterator at the specified index. */
+static listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction) {
+ listTypeIterator *li = zmalloc(sizeof(listTypeIterator));
+ li->subject = subject;
+ li->encoding = subject->encoding;
+ li->direction = direction;
+ if (li->encoding == REDIS_ENCODING_ZIPLIST) {
+ li->zi = ziplistIndex(subject->ptr,index);
+ } else if (li->encoding == REDIS_ENCODING_LIST) {
+ li->ln = listIndex(subject->ptr,index);
+ } else {
+ redisPanic("Unknown list encoding");
+ }
+ return li;
+}
+
+/* Clean up the iterator. */
+static void listTypeReleaseIterator(listTypeIterator *li) {
+ zfree(li);
+}
+
+/* Stores pointer to current the entry in the provided entry structure
+ * and advances the position of the iterator. Returns 1 when the current
+ * entry is in fact an entry, 0 otherwise. */
+static int listTypeNext(listTypeIterator *li, listTypeEntry *entry) {
+ /* Protect from converting when iterating */
+ redisAssert(li->subject->encoding == li->encoding);
+
+ entry->li = li;
+ if (li->encoding == REDIS_ENCODING_ZIPLIST) {
+ entry->zi = li->zi;
+ if (entry->zi != NULL) {
+ if (li->direction == REDIS_TAIL)
+ li->zi = ziplistNext(li->subject->ptr,li->zi);
+ else
+ li->zi = ziplistPrev(li->subject->ptr,li->zi);
+ return 1;
+ }
+ } else if (li->encoding == REDIS_ENCODING_LIST) {
+ entry->ln = li->ln;
+ if (entry->ln != NULL) {
+ if (li->direction == REDIS_TAIL)
+ li->ln = li->ln->next;
+ else
+ li->ln = li->ln->prev;
+ return 1;
+ }
+ } else {
+ redisPanic("Unknown list encoding");
+ }
+ return 0;
+}
+
+/* Return entry or NULL at the current position of the iterator. */
+static robj *listTypeGet(listTypeEntry *entry) {
+ listTypeIterator *li = entry->li;
+ robj *value = NULL;
+ if (li->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *vstr;
+ unsigned int vlen;
+ long long vlong;
+ redisAssert(entry->zi != NULL);
+ if (ziplistGet(entry->zi,&vstr,&vlen,&vlong)) {
+ if (vstr) {
+ value = createStringObject((char*)vstr,vlen);
+ } else {
+ value = createStringObjectFromLongLong(vlong);
+ }
+ }
+ } else if (li->encoding == REDIS_ENCODING_LIST) {
+ redisAssert(entry->ln != NULL);
+ value = listNodeValue(entry->ln);
+ incrRefCount(value);
+ } else {
+ redisPanic("Unknown list encoding");
+ }
+ return value;
+}
+
+/* Compare the given object with the entry at the current position. */
+static int listTypeEqual(listTypeEntry *entry, robj *o) {
+ listTypeIterator *li = entry->li;
+ if (li->encoding == REDIS_ENCODING_ZIPLIST) {
+ redisAssert(o->encoding == REDIS_ENCODING_RAW);
+ return ziplistCompare(entry->zi,o->ptr,sdslen(o->ptr));
+ } else if (li->encoding == REDIS_ENCODING_LIST) {
+ return equalStringObjects(o,listNodeValue(entry->ln));
+ } else {
+ redisPanic("Unknown list encoding");
+ }
+}
+
+/* Delete the element pointed to. */
+static void listTypeDelete(listTypeEntry *entry) {
+ listTypeIterator *li = entry->li;
+ if (li->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *p = entry->zi;
+ li->subject->ptr = ziplistDelete(li->subject->ptr,&p);
+
+ /* Update position of the iterator depending on the direction */
+ if (li->direction == REDIS_TAIL)
+ li->zi = p;
+ else
+ li->zi = ziplistPrev(li->subject->ptr,p);
+ } else if (entry->li->encoding == REDIS_ENCODING_LIST) {
+ listNode *next;
+ if (li->direction == REDIS_TAIL)
+ next = entry->ln->next;
+ else
+ next = entry->ln->prev;
+ listDelNode(li->subject->ptr,entry->ln);
+ li->ln = next;
+ } else {
+ redisPanic("Unknown list encoding");
+ }
+}
+
+static void listTypeConvert(robj *subject, int enc) {
+ listTypeIterator *li;
+ listTypeEntry entry;
+ redisAssert(subject->type == REDIS_LIST);
+
+ if (enc == REDIS_ENCODING_LIST) {
+ list *l = listCreate();
+
+ /* listTypeGet returns a robj with incremented refcount */
+ li = listTypeInitIterator(subject,0,REDIS_TAIL);
+ while (listTypeNext(li,&entry)) listAddNodeTail(l,listTypeGet(&entry));
+ listTypeReleaseIterator(li);
+
+ subject->encoding = REDIS_ENCODING_LIST;
+ zfree(subject->ptr);
+ subject->ptr = l;
+ } else {
+ redisPanic("Unsupported list conversion");
+ }
+}
+
+static void pushGenericCommand(redisClient *c, int where) {
+ robj *lobj = lookupKeyWrite(c->db,c->argv[1]);
if (lobj == NULL) {
if (handleClientsWaitingListPush(c,c->argv[1],c->argv[2])) {
addReply(c,shared.cone);
return;
}
- lobj = createListObject();
- list = lobj->ptr;
- if (where == REDIS_HEAD) {
- listAddNodeHead(list,c->argv[2]);
- } else {
- listAddNodeTail(list,c->argv[2]);
- }
- incrRefCount(c->argv[2]);
+ lobj = createZiplistObject();
dbAdd(c->db,c->argv[1],lobj);
} else {
if (lobj->type != REDIS_LIST) {
addReply(c,shared.cone);
return;
}
- list = lobj->ptr;
- if (where == REDIS_HEAD) {
- listAddNodeHead(list,c->argv[2]);
- } else {
- listAddNodeTail(list,c->argv[2]);
- }
- incrRefCount(c->argv[2]);
}
+ listTypePush(lobj,c->argv[2],where);
+ addReplyLongLong(c,listTypeLength(lobj));
server.dirty++;
- addReplyLongLong(c,listLength(list));
}
static void lpushCommand(redisClient *c) {
}
static void llenCommand(redisClient *c) {
- robj *o;
- list *l;
-
- if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
- checkType(c,o,REDIS_LIST)) return;
-
- l = o->ptr;
- addReplyUlong(c,listLength(l));
+ robj *o = lookupKeyReadOrReply(c,c->argv[1],shared.czero);
+ if (o == NULL || checkType(c,o,REDIS_LIST)) return;
+ addReplyUlong(c,listTypeLength(o));
}
static void lindexCommand(redisClient *c) {
- robj *o;
+ robj *o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk);
+ if (o == NULL || checkType(c,o,REDIS_LIST)) return;
int index = atoi(c->argv[2]->ptr);
- list *list;
- listNode *ln;
-
- if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
- checkType(c,o,REDIS_LIST)) return;
- list = o->ptr;
+ robj *value = NULL;
- ln = listIndex(list, index);
- if (ln == NULL) {
- addReply(c,shared.nullbulk);
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *p;
+ unsigned char *vstr;
+ unsigned int vlen;
+ long long vlong;
+ p = ziplistIndex(o->ptr,index);
+ if (ziplistGet(p,&vstr,&vlen,&vlong)) {
+ if (vstr) {
+ value = createStringObject((char*)vstr,vlen);
+ } else {
+ value = createStringObjectFromLongLong(vlong);
+ }
+ addReplyBulk(c,value);
+ decrRefCount(value);
+ } else {
+ addReply(c,shared.nullbulk);
+ }
+ } else if (o->encoding == REDIS_ENCODING_LIST) {
+ listNode *ln = listIndex(o->ptr,index);
+ if (ln != NULL) {
+ value = listNodeValue(ln);
+ addReplyBulk(c,value);
+ } else {
+ addReply(c,shared.nullbulk);
+ }
} else {
- robj *ele = listNodeValue(ln);
- addReplyBulk(c,ele);
+ redisPanic("Unknown list encoding");
}
}
static void lsetCommand(redisClient *c) {
- robj *o;
+ robj *o = lookupKeyWriteOrReply(c,c->argv[1],shared.nokeyerr);
+ if (o == NULL || checkType(c,o,REDIS_LIST)) return;
int index = atoi(c->argv[2]->ptr);
- list *list;
- listNode *ln;
-
- if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.nokeyerr)) == NULL ||
- checkType(c,o,REDIS_LIST)) return;
- list = o->ptr;
-
- ln = listIndex(list, index);
- if (ln == NULL) {
- addReply(c,shared.outofrangeerr);
+ robj *value = c->argv[3];
+
+ listTypeTryConversion(o,value);
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *p, *zl = o->ptr;
+ p = ziplistIndex(zl,index);
+ if (p == NULL) {
+ addReply(c,shared.outofrangeerr);
+ } else {
+ o->ptr = ziplistDelete(o->ptr,&p);
+ value = getDecodedObject(value);
+ o->ptr = ziplistInsert(o->ptr,p,value->ptr,sdslen(value->ptr));
+ decrRefCount(value);
+ addReply(c,shared.ok);
+ server.dirty++;
+ }
+ } else if (o->encoding == REDIS_ENCODING_LIST) {
+ listNode *ln = listIndex(o->ptr,index);
+ if (ln == NULL) {
+ addReply(c,shared.outofrangeerr);
+ } else {
+ decrRefCount((robj*)listNodeValue(ln));
+ listNodeValue(ln) = value;
+ incrRefCount(value);
+ addReply(c,shared.ok);
+ server.dirty++;
+ }
} else {
- robj *ele = listNodeValue(ln);
-
- decrRefCount(ele);
- listNodeValue(ln) = c->argv[3];
- incrRefCount(c->argv[3]);
- addReply(c,shared.ok);
- server.dirty++;
+ redisPanic("Unknown list encoding");
}
}
static void popGenericCommand(redisClient *c, int where) {
- robj *o;
- list *list;
- listNode *ln;
+ robj *o = lookupKeyWriteOrReply(c,c->argv[1],shared.nullbulk);
+ if (o == NULL || checkType(c,o,REDIS_LIST)) return;
- if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
- checkType(c,o,REDIS_LIST)) return;
- list = o->ptr;
-
- if (where == REDIS_HEAD)
- ln = listFirst(list);
- else
- ln = listLast(list);
-
- if (ln == NULL) {
+ robj *value = listTypePop(o,where);
+ if (value == NULL) {
addReply(c,shared.nullbulk);
} else {
- robj *ele = listNodeValue(ln);
- addReplyBulk(c,ele);
- listDelNode(list,ln);
- if (listLength(list) == 0) dbDelete(c->db,c->argv[1]);
+ addReplyBulk(c,value);
+ decrRefCount(value);
+ if (listTypeLength(o) == 0) dbDelete(c->db,c->argv[1]);
server.dirty++;
}
}
}
static void lrangeCommand(redisClient *c) {
- robj *o;
+ robj *o, *value;
int start = atoi(c->argv[2]->ptr);
int end = atoi(c->argv[3]->ptr);
int llen;
int rangelen, j;
- list *list;
- listNode *ln;
- robj *ele;
+ listTypeEntry entry;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.emptymultibulk)) == NULL
|| checkType(c,o,REDIS_LIST)) return;
- list = o->ptr;
- llen = listLength(list);
+ llen = listTypeLength(o);
/* convert negative indexes */
if (start < 0) start = llen+start;
rangelen = (end-start)+1;
/* Return the result in form of a multi-bulk reply */
- ln = listIndex(list, start);
addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",rangelen));
+ listTypeIterator *li = listTypeInitIterator(o,start,REDIS_TAIL);
for (j = 0; j < rangelen; j++) {
- ele = listNodeValue(ln);
- addReplyBulk(c,ele);
- ln = ln->next;
+ redisAssert(listTypeNext(li,&entry));
+ value = listTypeGet(&entry);
+ addReplyBulk(c,value);
+ decrRefCount(value);
}
+ listTypeReleaseIterator(li);
}
static void ltrimCommand(redisClient *c) {
if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.ok)) == NULL ||
checkType(c,o,REDIS_LIST)) return;
- list = o->ptr;
- llen = listLength(list);
+ llen = listTypeLength(o);
/* convert negative indexes */
if (start < 0) start = llen+start;
}
/* Remove list elements to perform the trim */
- for (j = 0; j < ltrim; j++) {
- ln = listFirst(list);
- listDelNode(list,ln);
- }
- for (j = 0; j < rtrim; j++) {
- ln = listLast(list);
- listDelNode(list,ln);
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ o->ptr = ziplistDeleteRange(o->ptr,0,ltrim);
+ o->ptr = ziplistDeleteRange(o->ptr,-rtrim,rtrim);
+ } else if (o->encoding == REDIS_ENCODING_LIST) {
+ list = o->ptr;
+ for (j = 0; j < ltrim; j++) {
+ ln = listFirst(list);
+ listDelNode(list,ln);
+ }
+ for (j = 0; j < rtrim; j++) {
+ ln = listLast(list);
+ listDelNode(list,ln);
+ }
+ } else {
+ redisPanic("Unknown list encoding");
}
- if (listLength(list) == 0) dbDelete(c->db,c->argv[1]);
+ if (listTypeLength(o) == 0) dbDelete(c->db,c->argv[1]);
server.dirty++;
addReply(c,shared.ok);
}
static void lremCommand(redisClient *c) {
- robj *o;
- list *list;
- listNode *ln, *next;
+ robj *subject, *obj = c->argv[3];
int toremove = atoi(c->argv[2]->ptr);
int removed = 0;
- int fromtail = 0;
+ listTypeEntry entry;
- if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.czero)) == NULL ||
- checkType(c,o,REDIS_LIST)) return;
- list = o->ptr;
+ subject = lookupKeyWriteOrReply(c,c->argv[1],shared.czero);
+ if (subject == NULL || checkType(c,subject,REDIS_LIST)) return;
+
+ /* Make sure obj is raw when we're dealing with a ziplist */
+ if (subject->encoding == REDIS_ENCODING_ZIPLIST)
+ obj = getDecodedObject(obj);
+ listTypeIterator *li;
if (toremove < 0) {
toremove = -toremove;
- fromtail = 1;
+ li = listTypeInitIterator(subject,-1,REDIS_HEAD);
+ } else {
+ li = listTypeInitIterator(subject,0,REDIS_TAIL);
}
- ln = fromtail ? list->tail : list->head;
- while (ln) {
- robj *ele = listNodeValue(ln);
- next = fromtail ? ln->prev : ln->next;
- if (equalStringObjects(ele,c->argv[3])) {
- listDelNode(list,ln);
+ while (listTypeNext(li,&entry)) {
+ if (listTypeEqual(&entry,obj)) {
+ listTypeDelete(&entry);
server.dirty++;
removed++;
if (toremove && removed == toremove) break;
}
- ln = next;
}
- if (listLength(list) == 0) dbDelete(c->db,c->argv[1]);
+ listTypeReleaseIterator(li);
+
+ /* Clean up raw encoded object */
+ if (subject->encoding == REDIS_ENCODING_ZIPLIST)
+ decrRefCount(obj);
+
+ if (listTypeLength(subject) == 0) dbDelete(c->db,c->argv[1]);
addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",removed));
}
* as well. This command was originally proposed by Ezra Zygmuntowicz.
*/
static void rpoplpushcommand(redisClient *c) {
- robj *sobj;
- list *srclist;
- listNode *ln;
-
+ robj *sobj, *value;
if ((sobj = lookupKeyWriteOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
checkType(c,sobj,REDIS_LIST)) return;
- srclist = sobj->ptr;
- ln = listLast(srclist);
- if (ln == NULL) {
+ if (listTypeLength(sobj) == 0) {
addReply(c,shared.nullbulk);
} else {
robj *dobj = lookupKeyWrite(c->db,c->argv[2]);
- robj *ele = listNodeValue(ln);
- list *dstlist;
-
- if (dobj && dobj->type != REDIS_LIST) {
- addReply(c,shared.wrongtypeerr);
- return;
- }
+ if (dobj && checkType(c,dobj,REDIS_LIST)) return;
+ value = listTypePop(sobj,REDIS_TAIL);
/* Add the element to the target list (unless it's directly
* passed to some BLPOP-ing client */
- if (!handleClientsWaitingListPush(c,c->argv[2],ele)) {
- if (dobj == NULL) {
- /* Create the list if the key does not exist */
- dobj = createListObject();
+ if (!handleClientsWaitingListPush(c,c->argv[2],value)) {
+ /* Create the list if the key does not exist */
+ if (!dobj) {
+ dobj = createZiplistObject();
dbAdd(c->db,c->argv[2],dobj);
}
- dstlist = dobj->ptr;
- listAddNodeHead(dstlist,ele);
- incrRefCount(ele);
+ listTypePush(dobj,value,REDIS_HEAD);
}
/* Send the element to the client as reply as well */
- addReplyBulk(c,ele);
+ addReplyBulk(c,value);
- /* Finally remove the element from the source list */
- listDelNode(srclist,ln);
- if (listLength(srclist) == 0) dbDelete(c->db,c->argv[1]);
+ /* listTypePop returns an object with its refcount incremented */
+ decrRefCount(value);
+
+ /* Delete the source list when it is empty */
+ if (listTypeLength(sobj) == 0) dbDelete(c->db,c->argv[1]);
server.dirty++;
}
}
* Returns 0 when the element cannot be found, rank otherwise.
* Note that the rank is 1-based due to the span of zsl->header to the
* first element. */
-static unsigned long zslGetRank(zskiplist *zsl, double score, robj *o) {
+static unsigned long zslistTypeGetRank(zskiplist *zsl, double score, robj *o) {
zskiplistNode *x;
unsigned long rank = 0;
int i;
}
/* Finds an element by its rank. The rank argument needs to be 1-based. */
-zskiplistNode* zslGetElementByRank(zskiplist *zsl, unsigned long rank) {
+zskiplistNode* zslistTypeGetElementByRank(zskiplist *zsl, unsigned long rank) {
zskiplistNode *x;
unsigned long traversed = 0;
int i;
/* check if starting point is trivial, before searching
* the element in log(N) time */
if (reverse) {
- ln = start == 0 ? zsl->tail : zslGetElementByRank(zsl, llen-start);
+ ln = start == 0 ? zsl->tail : zslistTypeGetElementByRank(zsl, llen-start);
} else {
ln = start == 0 ?
- zsl->header->forward[0] : zslGetElementByRank(zsl, start+1);
+ zsl->header->forward[0] : zslistTypeGetElementByRank(zsl, start+1);
}
/* Return the result in form of a multi-bulk reply */
}
score = dictGetEntryVal(de);
- rank = zslGetRank(zsl, *score, c->argv[2]);
+ rank = zslistTypeGetRank(zsl, *score, c->argv[2]);
if (rank) {
if (reverse) {
addReplyLongLong(c, zsl->length - rank);
* is optimized for speed and a bit less for readability */
static void sortCommand(redisClient *c) {
list *operations;
- int outputlen = 0;
+ unsigned int outputlen = 0;
int desc = 0, alpha = 0;
int limit_start = 0, limit_count = -1, start, end;
int j, dontsort = 0, vectorlen;
/* Load the sorting vector with all the objects to sort */
switch(sortval->type) {
- case REDIS_LIST: vectorlen = listLength((list*)sortval->ptr); break;
+ case REDIS_LIST: vectorlen = listTypeLength(sortval); break;
case REDIS_SET: vectorlen = dictSize((dict*)sortval->ptr); break;
case REDIS_ZSET: vectorlen = dictSize(((zset*)sortval->ptr)->dict); break;
default: vectorlen = 0; redisPanic("Bad SORT type"); /* Avoid GCC warning */
j = 0;
if (sortval->type == REDIS_LIST) {
- list *list = sortval->ptr;
- listNode *ln;
- listIter li;
-
- listRewind(list,&li);
- while((ln = listNext(&li))) {
- robj *ele = ln->value;
- vector[j].obj = ele;
+ listTypeIterator *li = listTypeInitIterator(sortval,0,REDIS_TAIL);
+ listTypeEntry entry;
+ while(listTypeNext(li,&entry)) {
+ vector[j].obj = listTypeGet(&entry);
vector[j].u.score = 0;
vector[j].u.cmpobj = NULL;
j++;
}
+ listTypeReleaseIterator(li);
} else {
dict *set;
dictIterator *di;
}
}
} else {
- robj *listObject = createListObject();
- list *listPtr = (list*) listObject->ptr;
+ robj *sobj = createZiplistObject();
/* STORE option specified, set the sorting result as a List object */
for (j = start; j <= end; j++) {
listIter li;
if (!getop) {
- listAddNodeTail(listPtr,vector[j].obj);
- incrRefCount(vector[j].obj);
- }
- listRewind(operations,&li);
- while((ln = listNext(&li))) {
- redisSortOperation *sop = ln->value;
- robj *val = lookupKeyByPattern(c->db,sop->pattern,
- vector[j].obj);
+ listTypePush(sobj,vector[j].obj,REDIS_TAIL);
+ } else {
+ listRewind(operations,&li);
+ while((ln = listNext(&li))) {
+ redisSortOperation *sop = ln->value;
+ robj *val = lookupKeyByPattern(c->db,sop->pattern,
+ vector[j].obj);
- if (sop->type == REDIS_SORT_GET) {
- if (!val) {
- listAddNodeTail(listPtr,createStringObject("",0));
+ if (sop->type == REDIS_SORT_GET) {
+ if (!val) val = createStringObject("",0);
+
+ /* listTypePush does an incrRefCount, so we should take care
+ * care of the incremented refcount caused by either
+ * lookupKeyByPattern or createStringObject("",0) */
+ listTypePush(sobj,val,REDIS_TAIL);
+ decrRefCount(val);
} else {
- /* We should do a incrRefCount on val because it is
- * added to the list, but also a decrRefCount because
- * it is returned by lookupKeyByPattern. This results
- * in doing nothing at all. */
- listAddNodeTail(listPtr,val);
+ /* always fails */
+ redisAssert(sop->type == REDIS_SORT_GET);
}
- } else {
- redisAssert(sop->type == REDIS_SORT_GET); /* always fails */
}
}
}
- dbReplace(c->db,storekey,listObject);
+ dbReplace(c->db,storekey,sobj);
/* Note: we add 1 because the DB is dirty anyway since even if the
* SORT result is empty a new key is set and maybe the old content
* replaced. */
}
/* Cleanup */
+ if (sortval->type == REDIS_LIST)
+ for (j = 0; j < vectorlen; j++)
+ decrRefCount(vector[j].obj);
decrRefCount(sortval);
listRelease(operations);
for (j = 0; j < vectorlen; j++) {
exit(1);
}
-/* Write an object into a file in the bulk format $<count>\r\n<payload>\r\n */
-static int fwriteBulkObject(FILE *fp, robj *obj) {
- char buf[128];
- int decrrc = 0;
-
- /* Avoid the incr/decr ref count business if possible to help
- * copy-on-write (we are often in a child process when this function
- * is called).
- * Also makes sure that key objects don't get incrRefCount-ed when VM
- * is enabled */
- if (obj->encoding != REDIS_ENCODING_RAW) {
- obj = getDecodedObject(obj);
- decrrc = 1;
- }
- snprintf(buf,sizeof(buf),"$%ld\r\n",(long)sdslen(obj->ptr));
- if (fwrite(buf,strlen(buf),1,fp) == 0) goto err;
- if (sdslen(obj->ptr) && fwrite(obj->ptr,sdslen(obj->ptr),1,fp) == 0)
- goto err;
- if (fwrite("\r\n",2,1,fp) == 0) goto err;
- if (decrrc) decrRefCount(obj);
- return 1;
-err:
- if (decrrc) decrRefCount(obj);
- return 0;
-}
-
/* Write binary-safe string into a file in the bulkformat
* $<count>\r\n<payload>\r\n */
static int fwriteBulkString(FILE *fp, char *s, unsigned long len) {
- char buf[128];
-
- snprintf(buf,sizeof(buf),"$%ld\r\n",(unsigned long)len);
- if (fwrite(buf,strlen(buf),1,fp) == 0) return 0;
- if (len && fwrite(s,len,1,fp) == 0) return 0;
+ char cbuf[128];
+ int clen;
+ cbuf[0] = '$';
+ clen = 1+ll2string(cbuf+1,sizeof(cbuf)-1,len);
+ cbuf[clen++] = '\r';
+ cbuf[clen++] = '\n';
+ if (fwrite(cbuf,clen,1,fp) == 0) return 0;
+ if (len > 0 && fwrite(s,len,1,fp) == 0) return 0;
if (fwrite("\r\n",2,1,fp) == 0) return 0;
return 1;
}
}
/* Write a long value in bulk format $<count>\r\n<payload>\r\n */
-static int fwriteBulkLong(FILE *fp, long l) {
- char buf[128], lbuf[128];
-
- snprintf(lbuf,sizeof(lbuf),"%ld\r\n",l);
- snprintf(buf,sizeof(buf),"$%lu\r\n",(unsigned long)strlen(lbuf)-2);
- if (fwrite(buf,strlen(buf),1,fp) == 0) return 0;
- if (fwrite(lbuf,strlen(lbuf),1,fp) == 0) return 0;
+static int fwriteBulkLongLong(FILE *fp, long long l) {
+ char bbuf[128], lbuf[128];
+ unsigned int blen, llen;
+ llen = ll2string(lbuf,32,l);
+ blen = snprintf(bbuf,sizeof(bbuf),"$%u\r\n%s\r\n",llen,lbuf);
+ if (fwrite(bbuf,blen,1,fp) == 0) return 0;
return 1;
}
+/* Delegate writing an object to writing a bulk string or bulk long long. */
+static int fwriteBulkObject(FILE *fp, robj *obj) {
+ /* Avoid using getDecodedObject to help copy-on-write (we are often
+ * in a child process when this function is called). */
+ if (obj->encoding == REDIS_ENCODING_INT) {
+ return fwriteBulkLongLong(fp,(long)obj->ptr);
+ } else if (obj->encoding == REDIS_ENCODING_RAW) {
+ return fwriteBulkString(fp,obj->ptr,sdslen(obj->ptr));
+ } else {
+ redisPanic("Unknown string encoding");
+ }
+}
+
/* Write a sequence of commands able to fully rebuild the dataset into
* "filename". Used both by REWRITEAOF and BGREWRITEAOF. */
static int rewriteAppendOnlyFile(char *filename) {
/* SELECT the new DB */
if (fwrite(selectcmd,sizeof(selectcmd)-1,1,fp) == 0) goto werr;
- if (fwriteBulkLong(fp,j) == 0) goto werr;
+ if (fwriteBulkLongLong(fp,j) == 0) goto werr;
/* Iterate this DB writing every entry */
while((de = dictNext(di)) != NULL) {
if (fwriteBulkObject(fp,o) == 0) goto werr;
} else if (o->type == REDIS_LIST) {
/* Emit the RPUSHes needed to rebuild the list */
- list *list = o->ptr;
- listNode *ln;
- listIter li;
+ char cmd[]="*3\r\n$5\r\nRPUSH\r\n";
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *zl = o->ptr;
+ unsigned char *p = ziplistIndex(zl,0);
+ unsigned char *vstr;
+ unsigned int vlen;
+ long long vlong;
+
+ while(ziplistGet(p,&vstr,&vlen,&vlong)) {
+ if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
+ if (fwriteBulkObject(fp,&key) == 0) goto werr;
+ if (vstr) {
+ if (fwriteBulkString(fp,(char*)vstr,vlen) == 0)
+ goto werr;
+ } else {
+ if (fwriteBulkLongLong(fp,vlong) == 0)
+ goto werr;
+ }
+ p = ziplistNext(zl,p);
+ }
+ } else if (o->encoding == REDIS_ENCODING_LIST) {
+ list *list = o->ptr;
+ listNode *ln;
+ listIter li;
- listRewind(list,&li);
- while((ln = listNext(&li))) {
- char cmd[]="*3\r\n$5\r\nRPUSH\r\n";
- robj *eleobj = listNodeValue(ln);
+ listRewind(list,&li);
+ while((ln = listNext(&li))) {
+ robj *eleobj = listNodeValue(ln);
- if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
- if (fwriteBulkObject(fp,&key) == 0) goto werr;
- if (fwriteBulkObject(fp,eleobj) == 0) goto werr;
+ if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
+ if (fwriteBulkObject(fp,&key) == 0) goto werr;
+ if (fwriteBulkObject(fp,eleobj) == 0) goto werr;
+ }
+ } else {
+ redisPanic("Unknown list encoding");
}
} else if (o->type == REDIS_SET) {
/* Emit the SADDs needed to rebuild the set */
if (expiretime < now) continue;
if (fwrite(cmd,sizeof(cmd)-1,1,fp) == 0) goto werr;
if (fwriteBulkObject(fp,&key) == 0) goto werr;
- if (fwriteBulkLong(fp,expiretime) == 0) goto werr;
+ if (fwriteBulkLongLong(fp,expiretime) == 0) goto werr;
}
if (swapped) decrRefCount(o);
}
struct dictEntry *best = NULL;
double best_swappability = 0;
redisDb *best_db = NULL;
- robj *key, *val;
+ robj *val;
+ sds key;
for (j = 0; j < server.dbnum; j++) {
redisDb *db = server.db+j;
if (maxtries) maxtries--;
de = dictGetRandomKey(db->dict);
- key = dictGetEntryKey(de);
val = dictGetEntryVal(de);
/* Only swap objects that are currently in memory.
*
val = dictGetEntryVal(best);
redisLog(REDIS_DEBUG,"Key with best swappability: %s, %f",
- key->ptr, best_swappability);
+ key, best_swappability);
/* Swap it */
if (usethreads) {
- vmSwapObjectThreaded(key,val,best_db);
+ robj *keyobj = createStringObject(key,sdslen(key));
+ vmSwapObjectThreaded(keyobj,val,best_db);
+ decrRefCount(keyobj);
return REDIS_OK;
} else {
vmpointer *vp;
/* Post process it in the main thread, as there are things we
* can do just here to avoid race conditions and/or invasive locks */
redisLog(REDIS_DEBUG,"COMPLETED Job type: %d, ID %p, key: %s", j->type, (void*)j->id, (unsigned char*)j->key->ptr);
- de = dictFind(j->db->dict,j->key);
+ de = dictFind(j->db->dict,j->key->ptr);
redisAssert(de != NULL);
if (j->type == REDIS_IOJOB_LOAD) {
redisDb *db;
static int vmSwapObjectThreaded(robj *key, robj *val, redisDb *db) {
iojob *j;
- assert(key->storage == REDIS_VM_MEMORY);
-
j = zmalloc(sizeof(*j));
j->type = REDIS_IOJOB_PREPARE_SWAP;
j->db = db;
if (o->type == REDIS_STRING) {
mixObjectDigest(digest,o);
} else if (o->type == REDIS_LIST) {
- list *list = o->ptr;
- listNode *ln;
- listIter li;
-
- listRewind(list,&li);
- while((ln = listNext(&li))) {
- robj *eleobj = listNodeValue(ln);
-
+ listTypeIterator *li = listTypeInitIterator(o,0,REDIS_TAIL);
+ listTypeEntry entry;
+ while(listTypeNext(li,&entry)) {
+ robj *eleobj = listTypeGet(&entry);
mixObjectDigest(digest,eleobj);
+ decrRefCount(eleobj);
}
+ listTypeReleaseIterator(li);
} else if (o->type == REDIS_SET) {
dict *set = o->ptr;
dictIterator *di = dictGetIterator(set);
projects / redis.git / blobdiff