From cb070d9813e4232b4ec8409ca555b529ee5cee4b Mon Sep 17 00:00:00 2001
From: Alan Conway <aconway@apache.org>
Date: Thu, 22 Nov 2007 23:55:39 +0000
Subject: Added framing::BodyHolder:  - Uniform holder for all body types,
 replaces MethodHolder.  - Uses in_place constructors to avoid avoid body
 copy.

framing::AMQFrame:
 - Holds body in heap-allocated intrusive_ptr<BodyHolder>
 - Uses in_place constructors to avoid avoid body copy.

Removed/downgraded to TODO many redundant FIXME comments.


git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@597513 13f79535-47bb-0310-9956-ffa450edef68
---
 cpp/rubygen/templates/MethodHolder.rb | 54 ++++++++++++++++++++++-------------
 1 file changed, 34 insertions(+), 20 deletions(-)

(limited to 'cpp/rubygen')

diff --git a/cpp/rubygen/templates/MethodHolder.rb b/cpp/rubygen/templates/MethodHolder.rb
index 95c60f5727..7e915677b2 100755
--- a/cpp/rubygen/templates/MethodHolder.rb
+++ b/cpp/rubygen/templates/MethodHolder.rb
@@ -7,13 +7,16 @@ class MethodHolderGen < CppGen
   def initialize(outdir, amqp)
     super(outdir, amqp)
     @namespace="qpid::framing"
-    @classname="MethodHolder"
-    @filename="qpid/framing/MethodHolder"
+    @classname="BodyHolder"
+    @filename="qpid/framing/BodyHolder"
   end
 
   def gen_max_size()
     # Generate program to generate MaxSize.h
-    cpp_file("generate_#{@classname}MaxSize_h") {
+    cpp_file("generate_MaxMethodBodySize_h") {
+      include "qpid/framing/AMQHeaderBody"
+      include "qpid/framing/AMQContentBody"
+      include "qpid/framing/AMQHeartbeatBody"
       @amqp.methods_.each { |m| include "qpid/framing/#{m.body_name}" }
       genl
       include "<algorithm>"
@@ -24,13 +27,16 @@ class MethodHolderGen < CppGen
       genl
       scope("int main(int, char** argv) {") {
         genl "size_t maxSize=0;"
+        genl "maxSize=max(maxSize, sizeof(AMQHeaderBody));" 
+        genl "maxSize=max(maxSize, sizeof(AMQContentBody));" 
+        genl "maxSize=max(maxSize, sizeof(AMQHeartbeatBody));" 
         @amqp.methods_.each { |m|
           genl "maxSize=max(maxSize, sizeof(#{m.body_name}));" }
         gen <<EOS
-ofstream out("#{@filename}MaxSize.h");
+ofstream out("qpid/framing/MaxMethodBodySize.h");
 out << "// GENERATED CODE: generated by " << argv[0] << endl;
 out << "namespace qpid{ namespace framing { " << endl;
-out << "const size_t MAX_METHODBODY_SIZE=" << maxSize << ";" << endl;
+out << "const size_t MAX_METHOD_BODY_SIZE=" << maxSize << ";" << endl;
 out << "}}" << endl;
 EOS
       }
@@ -38,40 +44,48 @@ EOS
   end
 
   def gen_construct
-    cpp_file(@filename+"_construct") {
+    cpp_file(@filename+"_gen") {
       include @filename
-      include "qpid/framing/MethodBodyConstVisitor.h"
+      include "qpid/framing/AMQHeaderBody"
+      include "qpid/framing/AMQContentBody"
+      include "qpid/framing/AMQHeartbeatBody"
       @amqp.methods_.each { |m| include "qpid/framing/#{m.body_name}" }
-      genl
+      include "qpid/framing/FrameDefaultVisitor.h"
       include "qpid/Exception.h"
       genl
       namespace(@namespace) {
-        # construct function
-        scope("void #{@classname}::construct(ClassId c, MethodId m) {") {
+        scope("void #{@classname}::setMethod(ClassId c, MethodId m) {") {
           scope("switch (c) {") {
             @amqp.classes.each { |c|
               scope("case #{c.index}: switch(m) {") {
                 c.methods_.each { |m|
-                  genl "case #{m.index}: blob.construct(in_place<#{m.body_name}>()); break;"
+                  genl "case #{m.index}: blob = in_place<#{m.body_name}>(); break;"
                 }
-                genl "default: throw Exception(QPID_MSG(\"Invalid method id \" << m << \" for class #{c.name} \"));"
+                genl "default: throw Exception(QPID_MSG(\"Invalid method id \" << int(m) << \" for class #{c.name} \"));"
               }
               genl "break;"
             }
-            genl "default: throw Exception(QPID_MSG(\"Invalid class id \" << c));"
+            genl "default: throw Exception(QPID_MSG(\"Invalid class id \" << int(c)));"
           }
         }
-        # CopyVisitor
-        struct("#{@classname}::CopyVisitor", "public MethodBodyConstVisitor") {           genl "MethodHolder& holder;"
-          genl "CopyVisitor(MethodHolder& h) : holder(h) {}"
+
+        struct("CopyVisitor", "public FrameDefaultVisitor") {
+          genl "using FrameDefaultVisitor::visit;"
+          genl "using FrameDefaultVisitor::defaultVisit;"
+          genl "BodyHolder& holder;"
+          genl "CopyVisitor(BodyHolder& h) : holder(h) {}"
+          ["Header", "Content", "Heartbeat"].each { |type|
+            genl "void visit(const AMQ#{type}Body& x) { holder=x; }"
+          }
           @amqp.methods_.each { |m|
-            genl "void visit(const #{m.body_name}& x) { holder.blob=x; }"
+            genl "void visit(const #{m.body_name}& x) { holder=x; }"
           }
+          genl "void defaultVisit(const AMQBody&) { assert(0); }"
         }
         genl
-        # operator=
-        scope("#{@classname}& MethodHolder::operator=(const AMQMethodBody& m) {") {
-          genl "CopyVisitor cv(*this); m.accept(cv); return *this;"
+
+        scope("void BodyHolder::setBody(const AMQBody& b) {") {
+          genl "CopyVisitor cv(*this); b.accept(cv);"
         }
       }}
   end
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