Rename bstate to bpop.

[redis.git] / src / t_list.c

diff --git a/src/t_list.c b/src/t_list.c
index 2a98103333b71d9014983b78e0b05ea6fe8cccd9..f5739792aabea35f586d69c17f344c1d9113657b 100644 (file)
--- a/src/t_list.c
+++ b/src/t_list.c
@@ -260,6 +260,7 @@ void listTypeConvert(robj *subject, int enc) {
 
 void pushGenericCommand(redisClient *c, int where) {
     robj *lobj = lookupKeyWrite(c->db,c->argv[1]);
 
 void pushGenericCommand(redisClient *c, int where) {
     robj *lobj = lookupKeyWrite(c->db,c->argv[1]);

+    c->argv[2] = tryObjectEncoding(c->argv[2]);

     if (lobj == NULL) {
         if (handleClientsWaitingListPush(c,c->argv[1],c->argv[2])) {
             addReply(c,shared.cone);
     if (lobj == NULL) {
         if (handleClientsWaitingListPush(c,c->argv[1],c->argv[2])) {
             addReply(c,shared.cone);


@@ -342,18 +343,21 @@ void pushxGenericCommand(redisClient *c, robj *refval, robj *val, int where) {
         server.dirty++;
     }
 
         server.dirty++;
     }
 

-    addReplyUlong(c,listTypeLength(subject));
+    addReplyLongLong(c,listTypeLength(subject));

 }
 
 void lpushxCommand(redisClient *c) {
 }
 
 void lpushxCommand(redisClient *c) {

+    c->argv[2] = tryObjectEncoding(c->argv[2]);

     pushxGenericCommand(c,NULL,c->argv[2],REDIS_HEAD);
 }
 
 void rpushxCommand(redisClient *c) {
     pushxGenericCommand(c,NULL,c->argv[2],REDIS_HEAD);
 }
 
 void rpushxCommand(redisClient *c) {

+    c->argv[2] = tryObjectEncoding(c->argv[2]);

     pushxGenericCommand(c,NULL,c->argv[2],REDIS_TAIL);
 }
 
 void linsertCommand(redisClient *c) {
     pushxGenericCommand(c,NULL,c->argv[2],REDIS_TAIL);
 }
 
 void linsertCommand(redisClient *c) {

+    c->argv[4] = tryObjectEncoding(c->argv[4]);

     if (strcasecmp(c->argv[2]->ptr,"after") == 0) {
         pushxGenericCommand(c,c->argv[3],c->argv[4],REDIS_TAIL);
     } else if (strcasecmp(c->argv[2]->ptr,"before") == 0) {
     if (strcasecmp(c->argv[2]->ptr,"after") == 0) {
         pushxGenericCommand(c,c->argv[3],c->argv[4],REDIS_TAIL);
     } else if (strcasecmp(c->argv[2]->ptr,"before") == 0) {


@@ -366,7 +370,7 @@ void linsertCommand(redisClient *c) {
 void llenCommand(redisClient *c) {
     robj *o = lookupKeyReadOrReply(c,c->argv[1],shared.czero);
     if (o == NULL || checkType(c,o,REDIS_LIST)) return;
 void llenCommand(redisClient *c) {
     robj *o = lookupKeyReadOrReply(c,c->argv[1],shared.czero);
     if (o == NULL || checkType(c,o,REDIS_LIST)) return;

-    addReplyUlong(c,listTypeLength(o));
+    addReplyLongLong(c,listTypeLength(o));

 }
 
 void lindexCommand(redisClient *c) {
 }
 
 void lindexCommand(redisClient *c) {


@@ -409,7 +413,7 @@ 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);
     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);

-    robj *value = c->argv[3];
+    robj *value = (c->argv[3] = tryObjectEncoding(c->argv[3]));

 
     listTypeTryConversion(o,value);
     if (o->encoding == REDIS_ENCODING_ZIPLIST) {
 
     listTypeTryConversion(o,value);
     if (o->encoding == REDIS_ENCODING_ZIPLIST) {


@@ -494,7 +498,7 @@ void lrangeCommand(redisClient *c) {
     rangelen = (end-start)+1;
 
     /* Return the result in form of a multi-bulk reply */
     rangelen = (end-start)+1;
 
     /* Return the result in form of a multi-bulk reply */

-    addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",rangelen));
+    addReplyMultiBulkLen(c,rangelen);

     listTypeIterator *li = listTypeInitIterator(o,start,REDIS_TAIL);
     for (j = 0; j < rangelen; j++) {
         redisAssert(listTypeNext(li,&entry));
     listTypeIterator *li = listTypeInitIterator(o,start,REDIS_TAIL);
     for (j = 0; j < rangelen; j++) {
         redisAssert(listTypeNext(li,&entry));


@@ -559,7 +563,8 @@ void ltrimCommand(redisClient *c) {
 }
 
 void lremCommand(redisClient *c) {
 }
 
 void lremCommand(redisClient *c) {

-    robj *subject, *obj = c->argv[3];
+    robj *subject, *obj;
+    obj = c->argv[3] = tryObjectEncoding(c->argv[3]);

     int toremove = atoi(c->argv[2]->ptr);
     int removed = 0;
     listTypeEntry entry;
     int toremove = atoi(c->argv[2]->ptr);
     int removed = 0;
     listTypeEntry entry;


@@ -594,7 +599,7 @@ void lremCommand(redisClient *c) {
         decrRefCount(obj);
 
     if (listTypeLength(subject) == 0) dbDelete(c->db,c->argv[1]);
         decrRefCount(obj);
 
     if (listTypeLength(subject) == 0) dbDelete(c->db,c->argv[1]);

-    addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",removed));
+    addReplyLongLong(c,removed);

     if (removed) touchWatchedKey(c->db,c->argv[1]);
 }
 
     if (removed) touchWatchedKey(c->db,c->argv[1]);
 }
 


@@ -613,7 +618,7 @@ void lremCommand(redisClient *c) {
  * since the element is not just returned but pushed against another list
  * as well. This command was originally proposed by Ezra Zygmuntowicz.
  */
  * since the element is not just returned but pushed against another list
  * as well. This command was originally proposed by Ezra Zygmuntowicz.
  */

-void rpoplpushcommand(redisClient *c) {
+void rpoplpushCommand(redisClient *c) {

     robj *sobj, *value;
     if ((sobj = lookupKeyWriteOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
         checkType(c,sobj,REDIS_LIST)) return;
     robj *sobj, *value;
     if ((sobj = lookupKeyWriteOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
         checkType(c,sobj,REDIS_LIST)) return;


@@ -684,17 +689,23 @@ void rpoplpushcommand(redisClient *c) {
 
 /* Set a client in blocking mode for the specified key, with the specified
  * timeout */
 
 /* Set a client in blocking mode for the specified key, with the specified
  * timeout */

-void blockForKeys(redisClient *c, robj **keys, int numkeys, time_t timeout) {
+void blockForKeys(redisClient *c, robj **keys, int numkeys, time_t timeout, robj *target) {

     dictEntry *de;
     list *l;
     int j;
 
     dictEntry *de;
     list *l;
     int j;
 

-    c->blocking_keys = zmalloc(sizeof(robj*)*numkeys);
-    c->blocking_keys_num = numkeys;
-    c->blockingto = timeout;
+    c->bpop.keys = zmalloc(sizeof(robj*)*numkeys);
+    c->bpop.count = numkeys;
+    c->bpop.timeout = timeout;
+    c->bpop.target = target;
+
+    if (target != NULL) {
+      incrRefCount(target);
+    }
+

     for (j = 0; j < numkeys; j++) {
         /* Add the key in the client structure, to map clients -> keys */
     for (j = 0; j < numkeys; j++) {
         /* Add the key in the client structure, to map clients -> keys */

-        c->blocking_keys[j] = keys[j];
+        c->bpop.keys[j] = keys[j];

         incrRefCount(keys[j]);
 
         /* And in the other "side", to map keys -> clients */
         incrRefCount(keys[j]);
 
         /* And in the other "side", to map keys -> clients */


@@ -723,22 +734,28 @@ void unblockClientWaitingData(redisClient *c) {
     list *l;
     int j;
 
     list *l;
     int j;
 

-    redisAssert(c->blocking_keys != NULL);
+    redisAssert(c->bpop.keys != NULL);

     /* The client may wait for multiple keys, so unblock it for every key. */
     /* The client may wait for multiple keys, so unblock it for every key. */

-    for (j = 0; j < c->blocking_keys_num; j++) {
+    for (j = 0; j < c->bpop.count; j++) {

         /* Remove this client from the list of clients waiting for this key. */
         /* Remove this client from the list of clients waiting for this key. */

-        de = dictFind(c->db->blocking_keys,c->blocking_keys[j]);
+        de = dictFind(c->db->blocking_keys,c->bpop.keys[j]);

         redisAssert(de != NULL);
         l = dictGetEntryVal(de);
         listDelNode(l,listSearchKey(l,c));
         /* If the list is empty we need to remove it to avoid wasting memory */
         if (listLength(l) == 0)
         redisAssert(de != NULL);
         l = dictGetEntryVal(de);
         listDelNode(l,listSearchKey(l,c));
         /* If the list is empty we need to remove it to avoid wasting memory */
         if (listLength(l) == 0)

-            dictDelete(c->db->blocking_keys,c->blocking_keys[j]);
-        decrRefCount(c->blocking_keys[j]);
+            dictDelete(c->db->blocking_keys,c->bpop.keys[j]);
+        decrRefCount(c->bpop.keys[j]);

     }
     }

+
+    if (c->bpop.target != NULL) {
+        decrRefCount(c->bpop.target);
+    }
+

     /* Cleanup the client structure */
     /* Cleanup the client structure */

-    zfree(c->blocking_keys);
-    c->blocking_keys = NULL;
+    zfree(c->bpop.keys);
+    c->bpop.keys = NULL;
+    c->bpop.target = NULL;

     c->flags &= (~REDIS_BLOCKED);
     server.blpop_blocked_clients--;
     /* We want to process data if there is some command waiting
     c->flags &= (~REDIS_BLOCKED);
     server.blpop_blocked_clients--;
     /* We want to process data if there is some command waiting


@@ -772,19 +789,63 @@ int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele) {
     redisAssert(ln != NULL);
     receiver = ln->value;
 
     redisAssert(ln != NULL);
     receiver = ln->value;
 

-    addReplySds(receiver,sdsnew("*2\r\n"));
-    addReplyBulk(receiver,key);
-    addReplyBulk(receiver,ele);
+    if (receiver->bpop.target == NULL) {
+        /* BRPOP/BLPOP return a multi-bulk with the name
+         * of the popped list */
+        addReplyMultiBulkLen(receiver,2);
+        addReplyBulk(receiver,key);
+        addReplyBulk(receiver,ele);
+    }
+    else {
+        /* BRPOPLPUSH */
+        robj *dobj = lookupKeyWrite(receiver->db,receiver->bpop.target);
+        if (dobj && checkType(receiver,dobj,REDIS_LIST)) return 0;
+
+        addReplyBulk(receiver,ele);
+
+        if (!handleClientsWaitingListPush(receiver, receiver->bpop.target, ele)) {
+            /* Create the list if the key does not exist */
+            if (!dobj) {
+                dobj = createZiplistObject();
+                dbAdd(receiver->db, receiver->bpop.target, dobj);
+            }
+
+            listTypePush(dobj, ele, REDIS_HEAD);
+        }
+    }
+

     unblockClientWaitingData(receiver);
     return 1;
 }
 
     unblockClientWaitingData(receiver);
     return 1;
 }
 

+int checkTimeout(redisClient *c, robj *object, time_t *timeout) {
+    long long lltimeout;
+
+    if (getLongLongFromObject(object, &lltimeout) != REDIS_OK) {
+        addReplyError(c, "timeout is not an integer");
+        return REDIS_ERR;
+    }
+
+    if (lltimeout < 0) {
+        addReplyError(c, "timeout is negative");
+        return REDIS_ERR;
+    }
+
+    *timeout = lltimeout;
+
+    return REDIS_OK;
+}
+

 /* Blocking RPOP/LPOP */
 void blockingPopGenericCommand(redisClient *c, int where) {
     robj *o;
     time_t timeout;
     int j;
 
 /* Blocking RPOP/LPOP */
 void blockingPopGenericCommand(redisClient *c, int where) {
     robj *o;
     time_t timeout;
     int j;
 

+    if (checkTimeout(c, c->argv[c->argc - 1], &timeout) != REDIS_OK) {
+        return;
+    }
+

     for (j = 1; j < c->argc-1; j++) {
         o = lookupKeyWrite(c->db,c->argv[j]);
         if (o != NULL) {
     for (j = 1; j < c->argc-1; j++) {
         o = lookupKeyWrite(c->db,c->argv[j]);
         if (o != NULL) {


@@ -811,22 +872,31 @@ void blockingPopGenericCommand(redisClient *c, int where) {
                      * "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... */
                      * "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... */

-                    addReplySds(c,sdsnew("*2\r\n"));
+                    addReplyMultiBulkLen(c,2);

                     addReplyBulk(c,argv[1]);
                     addReplyBulk(c,argv[1]);

+

                     popGenericCommand(c,where);
 
                     /* Fix the client structure with the original stuff */
                     c->argv = orig_argv;
                     c->argc = orig_argc;
                     popGenericCommand(c,where);
 
                     /* Fix the client structure with the original stuff */
                     c->argv = orig_argv;
                     c->argc = orig_argc;

+

                     return;
                 }
             }
         }
     }
                     return;
                 }
             }
         }
     }

+
+    /* If we are inside a MULTI/EXEC and the list is empty the only thing
+     * we can do is treating it as a timeout (even with timeout 0). */
+    if (c->flags & REDIS_MULTI) {
+        addReply(c,shared.nullmultibulk);
+        return;
+    }
+

     /* If the list is empty or the key does not exists we must block */
     /* If the list is empty or the key does not exists we must block */

-    timeout = strtol(c->argv[c->argc-1]->ptr,NULL,10);

     if (timeout > 0) timeout += time(NULL);
     if (timeout > 0) timeout += time(NULL);

-    blockForKeys(c,c->argv+1,c->argc-2,timeout);
+    blockForKeys(c, c->argv + 1, c->argc - 2, timeout, NULL);

 }
 
 void blpopCommand(redisClient *c) {
 }
 
 void blpopCommand(redisClient *c) {


@@ -836,3 +906,37 @@ void blpopCommand(redisClient *c) {
 void brpopCommand(redisClient *c) {
     blockingPopGenericCommand(c,REDIS_TAIL);
 }
 void brpopCommand(redisClient *c) {
     blockingPopGenericCommand(c,REDIS_TAIL);
 }

+
+void brpoplpushCommand(redisClient *c) {
+    time_t timeout;
+
+    if (checkTimeout(c, c->argv[3], &timeout) != REDIS_OK) {
+        return;
+    }
+
+    robj *key = lookupKeyWrite(c->db, c->argv[1]);
+
+    if (key == NULL) {
+        if (c->flags & REDIS_MULTI) {
+
+            /* Blocking against an empty list in a multi state
+             * returns immediately. */
+            addReply(c, shared.nullmultibulk);
+        } else {
+            if (timeout > 0) timeout += time(NULL);
+
+            /* The list is empty and the client blocks. */
+            blockForKeys(c, c->argv + 1, 1, timeout, c->argv[2]);
+        }
+    } else {
+        if (key->type != REDIS_LIST) {
+            addReply(c, shared.wrongtypeerr);
+        } else {
+
+            /* The list exists and has elements, so
+             * the regular rpoplpushCommand is executed. */
+            redisAssert(listTypeLength(key) > 0);
+            rpoplpushCommand(c);
+        }
+    }
+}