Free Redis context for custom connections

GitHub issue #72

cmd.c

@@ -6,6 +6,7 @@
 #include "worker.h"
 #include "http.h"
 #include "server.h"
+#include "slog.h"
 
 #include "formats/json.h"
 #include "formats/raw.h"
@@ -51,6 +52,11 @@ cmd_free(struct cmd *c) {
 	free(c->if_none_match);
 	if(c->mime_free) free(c->mime);
 
+	if (c->ac && /* we have a connection */
+		(c->database != c->w->s->cfg->database /* custom DB */
+		|| cmd_is_subscribe(c))) {
+		pool_free_context(c->ac);
+	}
 
 	free(c);
 }

pool.c

@@ -22,6 +22,15 @@ pool_new(struct worker *w, int count) {
 	return p;
 }
 
+void
+pool_free_context(redisAsyncContext *ac) {
+
+	if (ac)	{
+		redisAsyncDisconnect(ac);
+		redisAsyncFree(ac);
+	}
+}
+
 static void
 pool_on_connect(const redisAsyncContext *ac, int status) {
 	struct pool *p = ac->data;

pool.h

@@ -21,6 +21,9 @@ struct pool {
 struct pool *
 pool_new(struct worker *w, int count);
 
+void
+pool_free_context(redisAsyncContext *ac);
+
 redisAsyncContext *
 pool_connect(struct pool *p, int db_num, int attach);