syncio.c read / write functions reworked for correctness and performance.

[redis.git] / src / t_list.c

diff --git a/src/t_list.c b/src/t_list.c
index 636c556c23721b4c61446467d3496283be96b40e..ca03916b953fd1eb91d9e80b506b6646d97e45f4 100644 (file)
--- a/src/t_list.c
+++ b/src/t_list.c
@@ -296,8 +296,8 @@ void pushGenericCommand(redisClient *c, int where) {
      * be propagated). */
     if (waiting && pushed) {
         /* CMD KEY a b C D E */
-        for (j = 2; j < pushed+2; j++)
-            rewriteClientCommandArgument(c,j,c->argv[j+waiting]);
+        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;
     }
 }
@@ -699,6 +699,8 @@ void rpoplpushCommand(redisClient *c) {
         checkType(c,sobj,REDIS_LIST)) return;
 
     if (listTypeLength(sobj) == 0) {
+        /* This may only happen after loading very old RDB files. Recent
+         * versions of Redis delete keys of empty lists. */
         addReply(c,shared.nullbulk);
     } else {
         robj *dobj = lookupKeyWrite(c->db,c->argv[2]);
@@ -910,7 +912,7 @@ int getTimeoutFromObjectOrReply(redisClient *c, robj *object, time_t *timeout) {
         return REDIS_ERR;
     }
 
-    if (tval > 0) tval += time(NULL);
+    if (tval > 0) tval += server.unixtime;
     *timeout = tval;
 
     return REDIS_OK;
@@ -933,36 +935,22 @@ void blockingPopGenericCommand(redisClient *c, int where) {
                 return;
             } else {
                 if (listTypeLength(o) != 0) {
-                    /* If the list contains elements fall back to the usual
-                     * non-blocking POP operation */
-                    struct redisCommand *orig_cmd;
-                    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;
-                    orig_cmd = c->cmd;
-                    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;
-                    c->cmd = orig_cmd;
+                    /* 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;
                 }
             }