added a comment to sdsMakeRoomFor() to make it clear what the function actually does.

[redis.git] / src / multi.c

diff --git a/src/multi.c b/src/multi.c
index def1dd67326b546d4e96a7c88ee7ebf53fc06a51..44036256da50859bc5c2f3bd89709dde7d52b346 100644 (file)
--- a/src/multi.c
+++ b/src/multi.c
@@ -24,14 +24,14 @@ void freeClientMultiState(redisClient *c) {
 }
 
 /* Add a new command into the MULTI commands queue */
-void queueMultiCommand(redisClient *c, struct redisCommand *cmd) {
+void queueMultiCommand(redisClient *c) {
     multiCmd *mc;
     int j;
 
     c->mstate.commands = zrealloc(c->mstate.commands,
             sizeof(multiCmd)*(c->mstate.count+1));
     mc = c->mstate.commands+c->mstate.count;
-    mc->cmd = cmd;
+    mc->cmd = c->cmd;
     mc->argc = c->argc;
     mc->argv = zmalloc(sizeof(robj*)*c->argc);
     memcpy(mc->argv,c->argv,sizeof(robj*)*c->argc);
@@ -42,7 +42,7 @@ void queueMultiCommand(redisClient *c, struct redisCommand *cmd) {
 
 void multiCommand(redisClient *c) {
     if (c->flags & REDIS_MULTI) {
-        addReplySds(c,sdsnew("-ERR MULTI calls can not be nested\r\n"));
+        addReplyError(c,"MULTI calls can not be nested");
         return;
     }
     c->flags |= REDIS_MULTI;
@@ -51,7 +51,7 @@ void multiCommand(redisClient *c) {
 
 void discardCommand(redisClient *c) {
     if (!(c->flags & REDIS_MULTI)) {
-        addReplySds(c,sdsnew("-ERR DISCARD without MULTI\r\n"));
+        addReplyError(c,"DISCARD without MULTI");
         return;
     }
 
@@ -65,12 +65,10 @@ void discardCommand(redisClient *c) {
 /* Send a MULTI command to all the slaves and AOF file. Check the execCommand
  * implememntation for more information. */
 void execCommandReplicateMulti(redisClient *c) {
-    struct redisCommand *cmd;
     robj *multistring = createStringObject("MULTI",5);
 
-    cmd = lookupCommand("multi");
     if (server.appendonly)
-        feedAppendOnlyFile(cmd,c->db->id,&multistring,1);
+        feedAppendOnlyFile(server.multiCommand,c->db->id,&multistring,1);
     if (listLength(server.slaves))
         replicationFeedSlaves(server.slaves,c->db->id,&multistring,1);
     decrRefCount(multistring);
@@ -80,9 +78,10 @@ void execCommand(redisClient *c) {
     int j;
     robj **orig_argv;
     int orig_argc;
+    struct redisCommand *orig_cmd;
 
     if (!(c->flags & REDIS_MULTI)) {
-        addReplySds(c,sdsnew("-ERR EXEC without MULTI\r\n"));
+        addReplyError(c,"EXEC without MULTI");
         return;
     }
 
@@ -107,14 +106,22 @@ void execCommand(redisClient *c) {
     unwatchAllKeys(c); /* Unwatch ASAP otherwise we'll waste CPU cycles */
     orig_argv = c->argv;
     orig_argc = c->argc;
-    addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",c->mstate.count));
+    orig_cmd = c->cmd;
+    addReplyMultiBulkLen(c,c->mstate.count);
     for (j = 0; j < c->mstate.count; j++) {
         c->argc = c->mstate.commands[j].argc;
         c->argv = c->mstate.commands[j].argv;
-        call(c,c->mstate.commands[j].cmd);
+        c->cmd = c->mstate.commands[j].cmd;
+        call(c);
+
+        /* Commands may alter argc/argv, restore mstate. */
+        c->mstate.commands[j].argc = c->argc;
+        c->mstate.commands[j].argv = c->argv;
+        c->mstate.commands[j].cmd = c->cmd;
     }
     c->argv = orig_argv;
     c->argc = orig_argc;
+    c->cmd = orig_cmd;
     freeClientMultiState(c);
     initClientMultiState(c);
     c->flags &= ~(REDIS_MULTI|REDIS_DIRTY_CAS);
@@ -187,7 +194,7 @@ void unwatchAllKeys(redisClient *c) {
          * from the list */
         wk = listNodeValue(ln);
         clients = dictFetchValue(wk->db->watched_keys, wk->key);
-        redisAssert(clients != NULL);
+        redisAssertWithInfo(c,NULL,clients != NULL);
         listDelNode(clients,listSearchKey(clients,c));
         /* Kill the entry at all if this was the only client */
         if (listLength(clients) == 0)
@@ -251,7 +258,7 @@ void watchCommand(redisClient *c) {
     int j;
 
     if (c->flags & REDIS_MULTI) {
-        addReplySds(c,sdsnew("-ERR WATCH inside MULTI is not allowed\r\n"));
+        addReplyError(c,"WATCH inside MULTI is not allowed");
         return;
     }
     for (j = 1; j < c->argc; j++)