wbuf: remove tmpdir parameter

We can retrieve it when we actually need to create the
temporary file.  This saves an ivar slot and method dispatch
parameters.

This patch is nice, unfortunately the patch which follows is
not :P

4 files changed, 11 insertions, 9 deletions

diff --git a/lib/yahns/http_response.rb b/lib/yahns/http_response.rb
index 531194f..d957df6 100644
--- a/lib/yahns/http_response.rb
+++ b/lib/yahns/http_response.rb
@@ -62,7 +62,7 @@ module Yahns::HttpResponse # :nodoc:
       alive = Yahns::StreamFile.new(body, alive, offset, count)
       body = nil
     end
-    wbuf = Yahns::Wbuf.new(body, alive, self.class.output_buffer_tmpdir)
+    wbuf = Yahns::Wbuf.new(body, alive)
     rv = wbuf.wbuf_write(self, header)
     if body && ! alive.respond_to?(:call) # skip body.each if hijacked
       body.each { |chunk| rv = wbuf.wbuf_write(self, chunk) }
@@ -199,7 +199,7 @@ module Yahns::HttpResponse # :nodoc:
           chunk = rv # hope the skb grows when we loop into the trywrite
         when :wait_writable, :wait_readable
           if k.output_buffering
-            wbuf = Yahns::Wbuf.new(body, alive, k.output_buffer_tmpdir)
+            wbuf = Yahns::Wbuf.new(body, alive)
             rv = wbuf.wbuf_write(self, chunk)
             break
           else
diff --git a/lib/yahns/proxy_http_response.rb b/lib/yahns/proxy_http_response.rb
index 61f1539..8de5b4f 100644
--- a/lib/yahns/proxy_http_response.rb
+++ b/lib/yahns/proxy_http_response.rb
@@ -21,7 +21,7 @@ module Yahns::HttpResponse # :nodoc:
 
   def wbuf_alloc(req_res)
     if req_res.proxy_pass.proxy_buffering
-      Yahns::Wbuf.new(nil, req_res.alive, self.class.output_buffer_tmpdir)
+      Yahns::Wbuf.new(nil, req_res.alive)
     else
       Yahns::WbufLite.new(req_res)
     end
diff --git a/lib/yahns/wbuf.rb b/lib/yahns/wbuf.rb
index 1010c86..583df10 100644
--- a/lib/yahns/wbuf.rb
+++ b/lib/yahns/wbuf.rb
@@ -32,9 +32,8 @@ class Yahns::Wbuf # :nodoc:
   include Yahns::WbufCommon
   attr_reader :busy
 
-  def initialize(body, persist, tmpdir)
+  def initialize(body, persist)
     @tmpio = nil
-    @tmpdir = tmpdir
     @sf_offset = @sf_count = 0
     @wbuf_persist = persist # whether or not we keep the connection alive
     @body = body # something we call #close on when done writing
@@ -58,7 +57,7 @@ class Yahns::Wbuf # :nodoc:
       @busy = rv
     end until @busy
 
-    @tmpio ||= Yahns::TmpIO.new(@tmpdir)
+    @tmpio ||= Yahns::TmpIO.new(c.class.output_buffer_tmpdir)
     @sf_count += String === buf ? @tmpio.write(buf) : wbuf_writev(buf)
 
     # we spent some time copying to the FS, try to write to
diff --git a/test/test_wbuf.rb b/test/test_wbuf.rb
index 990ad9d..1382086 100644
--- a/test/test_wbuf.rb
+++ b/test/test_wbuf.rb
@@ -9,6 +9,9 @@ class TestWbuf < Testcase
 
   class KgioUS < UNIXSocket
     include Kgio::SocketMethods
+    def self.output_buffer_tmpdir
+      Dir.tmpdir
+    end
   end
 
   def socketpair
@@ -20,7 +23,7 @@ class TestWbuf < Testcase
     buf = "*" * (16384 * 2)
     nr = 1000
     [ true, false ].each do |persist|
-      wbuf = Yahns::Wbuf.new([], persist, Dir.tmpdir)
+      wbuf = Yahns::Wbuf.new([], persist)
       assert_equal false, wbuf.busy
       a, b = socketpair
       assert_nil wbuf.wbuf_write(a, "HIHI")
@@ -71,7 +74,7 @@ class TestWbuf < Testcase
         break
       end while true
     end
-    wbuf = Yahns::Wbuf.new([], true, Dir.tmpdir)
+    wbuf = Yahns::Wbuf.new([], true)
 
     rv1 = wbuf.wbuf_write(a, buf)
     rv2 = wbuf.wbuf_flush(a)
@@ -104,7 +107,7 @@ class TestWbuf < Testcase
   def test_wbuf_flush_close
     pipe = cloexec_pipe
     persist = true
-    wbuf = Yahns::Wbuf.new(pipe[0], persist, Dir.tmpdir)
+    wbuf = Yahns::Wbuf.new(pipe[0], persist)
     refute wbuf.respond_to?(:close) # we don't want this for HttpResponse body
     sp = socketpair
     rv = nil