[PATCH] allow vector args to wbuf_write

[PATCH] allow vector args to wbuf_write

[Eric Wong]

This allows us to write chunked response bodies without extra
copying to clients which support streaming.
---
 lib/yahns/wbuf.rb | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/lib/yahns/wbuf.rb b/lib/yahns/wbuf.rb
index ba7ea0f..fa39b9b 100644
--- a/lib/yahns/wbuf.rb
+++ b/lib/yahns/wbuf.rb
@@ -40,10 +40,11 @@ def initialize(body, persist, tmpdir, busy)
     @busy = busy # may be false
   end
 
-  def wbuf_write(client, buf)
-    # try to bypass the VFS layer if we're all caught up
-    case rv = client.kgio_trywrite(buf)
-    when String
+  def wbuf_write(c, buf)
+    # try to bypass the VFS layer and write directly to the socket
+    # if we're all caught up
+    case rv = String === buf ? c.kgio_trywrite(buf) : c.kgio_trywritev(buf)
+    when String, Array
       buf = rv # retry in loop
     when nil
       return # yay! hopefully we don't have to buffer again
@@ -52,8 +53,11 @@ def wbuf_write(client, buf)
     end until @busy
 
     @tmpio ||= Yahns::TmpIO.new(@tmpdir)
-    @sf_count += @tmpio.write(buf)
-    case rv = client.trysendfile(@tmpio, @sf_offset, @sf_count)
+    @sf_count += String === buf ? @tmpio.write(buf) : @tmpio.kgio_writev(buf)
+
+    # we spent some time copying to the FS, try to write to
+    # the socket again in case some space opened up...
+    case rv = c.trysendfile(@tmpio, @sf_offset, @sf_count)
     when Integer
       @sf_count -= rv
       @sf_offset += rv
-- 
EW