}
/* Initialize an iterator at the specified index. */
-listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction) {
+listTypeIterator *listTypeInitIterator(robj *subject, long index, unsigned char direction) {
listTypeIterator *li = zmalloc(sizeof(listTypeIterator));
li->subject = subject;
li->encoding = subject->encoding;
int listTypeEqual(listTypeEntry *entry, robj *o) {
listTypeIterator *li = entry->li;
if (li->encoding == REDIS_ENCODING_ZIPLIST) {
- redisAssert(o->encoding == REDIS_ENCODING_RAW);
+ redisAssertWithInfo(NULL,o,o->encoding == REDIS_ENCODING_RAW);
return ziplistCompare(entry->zi,o->ptr,sdslen(o->ptr));
} else if (li->encoding == REDIS_ENCODING_LINKEDLIST) {
return equalStringObjects(o,listNodeValue(entry->ln));
void listTypeConvert(robj *subject, int enc) {
listTypeIterator *li;
listTypeEntry entry;
- redisAssert(subject->type == REDIS_LIST);
+ redisAssertWithInfo(NULL,subject,subject->type == REDIS_LIST);
if (enc == REDIS_ENCODING_LINKEDLIST) {
list *l = listCreate();
*----------------------------------------------------------------------------*/
void pushGenericCommand(redisClient *c, int where) {
- int j, addlen = 0, pushed = 0;
+ int j, waiting = 0, pushed = 0;
robj *lobj = lookupKeyWrite(c->db,c->argv[1]);
int may_have_waiting_clients = (lobj == NULL);
c->argv[j] = tryObjectEncoding(c->argv[j]);
if (may_have_waiting_clients) {
if (handleClientsWaitingListPush(c,c->argv[1],c->argv[j])) {
- addlen++;
+ waiting++;
continue;
} else {
may_have_waiting_clients = 0;
listTypePush(lobj,c->argv[j],where);
pushed++;
}
- addReplyLongLong(c,addlen + (lobj ? listTypeLength(lobj) : 0));
+ addReplyLongLong(c, waiting + (lobj ? listTypeLength(lobj) : 0));
if (pushed) signalModifiedKey(c->db,c->argv[1]);
server.dirty += pushed;
+
+ /* Alter the replication of the command accordingly to the number of
+ * list elements delivered to clients waiting into a blocking operation.
+ * We do that only if there were waiting clients, and only if still some
+ * element was pushed into the list (othewise dirty is 0 and nothign will
+ * be propagated). */
+ if (waiting && pushed) {
+ /* CMD KEY a b C D E */
+ for (j = 0; j < waiting; j++) decrRefCount(c->argv[j+2]);
+ memmove(c->argv+2,c->argv+2+waiting,sizeof(robj*)*pushed);
+ c->argc -= waiting;
+ }
}
void lpushCommand(redisClient *c) {
if (refval != NULL) {
/* Note: we expect refval to be string-encoded because it is *not* the
* last argument of the multi-bulk LINSERT. */
- redisAssert(refval->encoding == REDIS_ENCODING_RAW);
+ redisAssertWithInfo(c,refval,refval->encoding == REDIS_ENCODING_RAW);
/* We're not sure if this value can be inserted yet, but we cannot
* convert the list inside the iterator. We don't want to loop over
void lindexCommand(redisClient *c) {
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);
+ long index;
robj *value = NULL;
+ if ((getLongFromObjectOrReply(c, c->argv[2], &index, NULL) != REDIS_OK))
+ return;
+
if (o->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned char *p;
unsigned char *vstr;
void lsetCommand(redisClient *c) {
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);
+ long index;
robj *value = (c->argv[3] = tryObjectEncoding(c->argv[3]));
+ if ((getLongFromObjectOrReply(c, c->argv[2], &index, NULL) != REDIS_OK))
+ return;
+
listTypeTryConversion(o,value);
if (o->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned char *p, *zl = o->ptr;
void lrangeCommand(redisClient *c) {
robj *o;
- int start = atoi(c->argv[2]->ptr);
- int end = atoi(c->argv[3]->ptr);
- int llen;
- int rangelen;
+ long start, end, llen, rangelen;
+
+ if ((getLongFromObjectOrReply(c, c->argv[2], &start, NULL) != REDIS_OK) ||
+ (getLongFromObjectOrReply(c, c->argv[3], &end, NULL) != REDIS_OK)) return;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.emptymultibulk)) == NULL
|| checkType(c,o,REDIS_LIST)) return;
p = ziplistNext(o->ptr,p);
}
} else if (o->encoding == REDIS_ENCODING_LINKEDLIST) {
- listNode *ln = listIndex(o->ptr,start);
+ listNode *ln;
+
+ /* If we are nearest to the end of the list, reach the element
+ * starting from tail and going backward, as it is faster. */
+ if (start > llen/2) start -= llen;
+ ln = listIndex(o->ptr,start);
while(rangelen--) {
addReplyBulk(c,ln->value);
void ltrimCommand(redisClient *c) {
robj *o;
- int start = atoi(c->argv[2]->ptr);
- int end = atoi(c->argv[3]->ptr);
- int llen;
- int j, ltrim, rtrim;
+ long start, end, llen, j, ltrim, rtrim;
list *list;
listNode *ln;
+ if ((getLongFromObjectOrReply(c, c->argv[2], &start, NULL) != REDIS_OK) ||
+ (getLongFromObjectOrReply(c, c->argv[3], &end, NULL) != REDIS_OK)) return;
+
if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.ok)) == NULL ||
checkType(c,o,REDIS_LIST)) return;
llen = listTypeLength(o);
void lremCommand(redisClient *c) {
robj *subject, *obj;
obj = c->argv[3] = tryObjectEncoding(c->argv[3]);
- int toremove = atoi(c->argv[2]->ptr);
- int removed = 0;
+ long toremove;
+ long removed = 0;
listTypeEntry entry;
+ if ((getLongFromObjectOrReply(c, c->argv[2], &toremove, NULL) != REDIS_OK))
+ return;
+
subject = lookupKeyWriteOrReply(c,c->argv[1],shared.czero);
if (subject == NULL || checkType(c,subject,REDIS_LIST)) return;
* as well. This command was originally proposed by Ezra Zygmuntowicz.
*/
-void rpoplpushHandlePush(redisClient *c, robj *dstkey, robj *dstobj, robj *value) {
- if (!handleClientsWaitingListPush(c,dstkey,value)) {
+void rpoplpushHandlePush(redisClient *origclient, redisClient *c, robj *dstkey, robj *dstobj, robj *value) {
+ if (!handleClientsWaitingListPush(origclient,dstkey,value)) {
/* Create the list if the key does not exist */
if (!dstobj) {
dstobj = createZiplistObject();
dbAdd(c->db,dstkey,dstobj);
} else {
signalModifiedKey(c->db,dstkey);
- server.dirty++;
}
listTypePush(dstobj,value,REDIS_HEAD);
+ /* Additionally propagate this PUSH operation together with
+ * the operation performed by the command. */
+ {
+ robj **argv = zmalloc(sizeof(robj*)*3);
+ argv[0] = createStringObject("LPUSH",5);
+ argv[1] = dstkey;
+ argv[2] = value;
+ incrRefCount(argv[1]);
+ incrRefCount(argv[2]);
+ alsoPropagate(server.lpushCommand,c->db->id,argv,3,
+ REDIS_PROPAGATE_AOF|REDIS_PROPAGATE_REPL);
+ }
}
-
/* Always send the pushed value to the client. */
addReplyBulk(c,value);
}
addReply(c,shared.nullbulk);
} else {
robj *dobj = lookupKeyWrite(c->db,c->argv[2]);
+ robj *touchedkey = c->argv[1];
+
if (dobj && checkType(c,dobj,REDIS_LIST)) return;
value = listTypePop(sobj,REDIS_TAIL);
- rpoplpushHandlePush(c,c->argv[2],dobj,value);
+ /* We saved touched key, and protect it, since rpoplpushHandlePush
+ * may change the client command argument vector. */
+ incrRefCount(touchedkey);
+ rpoplpushHandlePush(c,c,c->argv[2],dobj,value);
/* 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]);
- signalModifiedKey(c->db,c->argv[1]);
+ if (listTypeLength(sobj) == 0) dbDelete(c->db,touchedkey);
+ signalModifiedKey(c->db,touchedkey);
+ decrRefCount(touchedkey);
server.dirty++;
+
+ /* Replicate this as a simple RPOP since the LPUSH side is replicated
+ * by rpoplpushHandlePush() call if needed (it may not be needed
+ * if a client is blocking wait a push against the list). */
+ rewriteClientCommandVector(c,2,
+ resetRefCount(createStringObject("RPOP",4)),
+ c->argv[1]);
}
}
l = listCreate();
retval = dictAdd(c->db->blocking_keys,keys[j],l);
incrRefCount(keys[j]);
- redisAssert(retval == DICT_OK);
+ redisAssertWithInfo(c,keys[j],retval == DICT_OK);
} else {
- l = dictGetEntryVal(de);
+ l = dictGetVal(de);
}
listAddNodeTail(l,c);
}
list *l;
int j;
- redisAssert(c->bpop.keys != NULL);
+ redisAssertWithInfo(c,NULL,c->bpop.keys != NULL);
/* The client may wait for multiple keys, so unblock it for every key. */
for (j = 0; j < c->bpop.count; j++) {
/* Remove this client from the list of clients waiting for this key. */
de = dictFind(c->db->blocking_keys,c->bpop.keys[j]);
- redisAssert(de != NULL);
- l = dictGetEntryVal(de);
+ redisAssertWithInfo(c,c->bpop.keys[j],de != NULL);
+ l = dictGetVal(de);
listDelNode(l,listSearchKey(l,c));
/* If the list is empty we need to remove it to avoid wasting memory */
if (listLength(l) == 0)
/* Cleanup the client structure */
zfree(c->bpop.keys);
c->bpop.keys = NULL;
+ if (c->bpop.target) decrRefCount(c->bpop.target);
c->bpop.target = NULL;
c->flags &= ~REDIS_BLOCKED;
c->flags |= REDIS_UNBLOCKED;
de = dictFind(c->db->blocking_keys,key);
if (de == NULL) return 0;
- clients = dictGetEntryVal(de);
+ clients = dictGetVal(de);
numclients = listLength(clients);
/* Try to handle the push as long as there are clients waiting for a push.
* this happens, it simply tries the next client waiting for a push. */
while (numclients--) {
ln = listFirst(clients);
- redisAssert(ln != NULL);
+ redisAssertWithInfo(c,key,ln != NULL);
receiver = ln->value;
dstkey = receiver->bpop.target;
+ /* Protect receiver->bpop.target, that will be freed by
+ * the next unblockClientWaitingData() call. */
+ if (dstkey) incrRefCount(dstkey);
+
/* This should remove the first element of the "clients" list. */
unblockClientWaitingData(receiver);
addReplyMultiBulkLen(receiver,2);
addReplyBulk(receiver,key);
addReplyBulk(receiver,ele);
- return 1;
+ return 1; /* Serve just the first client as in B[RL]POP semantics */
} else {
/* BRPOPLPUSH, note that receiver->db is always equal to c->db. */
dstobj = lookupKeyWrite(receiver->db,dstkey);
- if (dstobj && checkType(receiver,dstobj,REDIS_LIST)) {
- decrRefCount(dstkey);
- } else {
- rpoplpushHandlePush(receiver,dstkey,dstobj,ele);
+ if (!(dstobj && checkType(receiver,dstobj,REDIS_LIST))) {
+ rpoplpushHandlePush(c,receiver,dstkey,dstobj,ele);
decrRefCount(dstkey);
return 1;
}
+ decrRefCount(dstkey);
}
}
return;
} else {
if (listTypeLength(o) != 0) {
- /* If the list contains elements fall back to the usual
- * non-blocking POP operation */
- robj *argv[2], **orig_argv;
- int orig_argc;
-
- /* We need to alter the command arguments before to call
- * popGenericCommand() as the command takes a single key. */
- orig_argv = c->argv;
- orig_argc = c->argc;
- argv[1] = c->argv[j];
- c->argv = argv;
- c->argc = 2;
-
- /* Also the return value is different, we need to output
- * the multi bulk reply header and the key name. The
- * "real" command will add the last element (the value)
- * for us. If this souds like an hack to you it's just
- * because it is... */
- addReplyMultiBulkLen(c,2);
- addReplyBulk(c,argv[1]);
-
- popGenericCommand(c,where);
-
- /* Fix the client structure with the original stuff */
- c->argv = orig_argv;
- c->argc = orig_argc;
+ /* Non empty list, this is like a non normal [LR]POP. */
+ robj *value = listTypePop(o,where);
+ redisAssert(value != NULL);
+ addReplyMultiBulkLen(c,2);
+ addReplyBulk(c,c->argv[j]);
+ addReplyBulk(c,value);
+ decrRefCount(value);
+ if (listTypeLength(o) == 0) dbDelete(c->db,c->argv[j]);
+ signalModifiedKey(c->db,c->argv[j]);
+ server.dirty++;
+
+ /* Replicate it as an [LR]POP instead of B[LR]POP. */
+ rewriteClientCommandVector(c,2,
+ (where == REDIS_HEAD) ? shared.lpop : shared.rpop,
+ c->argv[j]);
return;
}
}
/* The list exists and has elements, so
* the regular rpoplpushCommand is executed. */
- redisAssert(listTypeLength(key) > 0);
+ redisAssertWithInfo(c,key,listTypeLength(key) > 0);
rpoplpushCommand(c);
}
}
projects / redis.git / blobdiff