Added likely() and unlikely() branch prediction hint macros

to syshead.h

Introduced BUF_MAX constant to limit struct buffer offset and length
values.  BUF_MAX has been set to 2^20.

Use likely() and unlikely() macros in buffer.h code to allow the
compiler to generate more efficient code.


git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@3058 e7ae566f-a301-0410-adde-c780ea21d3b5

1 files changed, 1 insertions, 0 deletions

diff --git a/buffer.c b/buffer.c
index 03ff8fc..08f0656 100644
--- a/buffer.c
+++ b/buffer.c
@@ -54,6 +54,7 @@ alloc_buf_gc (size_t size, struct gc_arena *gc)
 #endif
 {
   struct buffer buf;
+  ASSERT (size <= BUF_MAX);
   buf.capacity = (int)size;
   buf.offset = 0;
   buf.len = 0;