ndb_redis: README file update for redis_free function.

modules/ndb_redis/README

@@ -10,7 +10,13 @@ Daniel-Constantin Mierla
 
    <[email protected]>
 
-   Copyright © 2011 asipto.com
+Vicente Hernando
+
+   <[email protected]>
+
+   Copyright © 2011 asipto.com
+
+   Copyright © 2012 www.systemonenoc.com
      __________________________________________________________________
 
    Table of Contents
@@ -30,11 +36,13 @@ Daniel-Constantin Mierla
         4. Functions
 
               4.1. redis_cmd(srvname, command, replyid)
+              4.2. redis_free(replyid)
 
    List of Examples
 
    1.1. Set server parameter
    1.2. redis_cmd usage
+   1.3. redis_free usage
 
 Chapter 1. Admin Guide
 
@@ -53,6 +61,7 @@ Chapter 1. Admin Guide
    4. Functions
 
         4.1. redis_cmd(srvname, command, replyid)
+        4.2. redis_free(replyid)
 
 1. Overview
 
@@ -107,8 +116,9 @@ modparam("ndb_redis", "server", "name=srvX;addr=127.0.0.2;port=6379;db=4")
 4. Functions
 
    4.1. redis_cmd(srvname, command, replyid)
+   4.2. redis_free(replyid)
 
-4.1. redis_cmd(srvname, command, replyid)
+4.1.  redis_cmd(srvname, command, replyid)
 
    Send a command to REDIS server identified by srvname. The reply will be
    stored in a local continer identified by replyid. All the parameters
@@ -148,3 +158,22 @@ if(redis_cmd("srvN", "HMGET foo_key field1 field3", "r")) {
     xlog("first values: $redis(r=>value[0]) , $redis(r=>value[1])\n");
 }
 ...
+
+4.2.  redis_free(replyid)
+
+   Free a previous reply from memory. After this function call, accessing
+   to a freed replyid returns null value.
+
+   It is not necessary to free a reply to use it again in a new redis_cmd
+   function. When ndb_redis module closes, all pending replies are freed
+   automatically, so you only need to use this function if you perform a
+   lot of redis command requests with different replyid.
+
+   Example 1.3. redis_free usage
+...
+After a redis command call:
+        redis_cmd("srvN", "INCR cnt", "r");
+
+when reply not used anymore:
+        redis_free("r");
+...