Merge team/russell/frame_caching

There are some situations in Asterisk where ast_frame and/or iax_frame
structures are rapidly allocatted and freed (at least 50 times per second
for one call).

This code significantly improves the performance of ast_frame_header_new(), 
ast_frdup(), ast_frfree(), iax_frame_new(), and iax_frame_free() by keeping
a thread-local cache of these structures and using frames from the cache 
whenever possible instead of calling malloc/free every time.

This commit also converts the ast_frame and iax_frame structures to use the
linked list macros.


git-svn-id: http://svn.digium.com/svn/asterisk/trunk@41278 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 5 insertions, 2 deletions

diff --git a/channels/iax2-parser.h b/channels/iax2-parser.h
index b926b4b94..2970c9f61 100644
--- a/channels/iax2-parser.h
+++ b/channels/iax2-parser.h
@@ -18,6 +18,8 @@
 #ifndef _IAX2_PARSER_H
 #define _IAX2_PARSER_H
 
+#include "asterisk/linkedlists.h"
+
 struct iax_ies {
 	char *called_number;
 	char *calling_number;
@@ -115,10 +117,11 @@ struct iax_frame {
 	/* Retransmission ID */
 	int retrans;
 	/* Easy linking */
-	struct iax_frame *next;
-	struct iax_frame *prev;
+	AST_LIST_ENTRY(iax_frame) list;
 	/* Actual, isolated frame header */
 	struct ast_frame af;
+	/*! Amount of space _allocated_ for data */
+	size_t mallocd_datalen;
 	unsigned char unused[AST_FRIENDLY_OFFSET];
 	unsigned char afdata[0];	/* Data for frame */
 };