From 6ef984af4b0c63c1c33127a12dcfc8e6359f0c9e Mon Sep 17 00:00:00 2001
From: Feng Xiao <xfxyjwf@gmail.com>
Date: Mon, 10 Nov 2014 17:34:54 -0800
Subject: Down-integrate from internal code base.

---
 src/google/protobuf/extension_set.h | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

(limited to 'src/google/protobuf/extension_set.h')

diff --git a/src/google/protobuf/extension_set.h b/src/google/protobuf/extension_set.h
index d6fc45df..6d6702b3 100644
--- a/src/google/protobuf/extension_set.h
+++ b/src/google/protobuf/extension_set.h
@@ -51,6 +51,7 @@
 namespace google {
 
 namespace protobuf {
+  class Arena;
   class Descriptor;                                    // descriptor.h
   class FieldDescriptor;                               // descriptor.h
   class DescriptorPool;                                // descriptor.h
@@ -157,6 +158,7 @@ class MessageSetFieldSkipper;
 class LIBPROTOBUF_EXPORT ExtensionSet {
  public:
   ExtensionSet();
+  explicit ExtensionSet(::google::protobuf::Arena* arena);
   ~ExtensionSet();
 
   // These are called at startup by protocol-compiler-generated code to
@@ -261,9 +263,13 @@ class LIBPROTOBUF_EXPORT ExtensionSet {
                            const FieldDescriptor* descriptor,
                            MessageLite* message);
   MessageLite* ReleaseMessage(int number, const MessageLite& prototype);
+  MessageLite* UnsafeArenaReleaseMessage(
+      int number, const MessageLite& prototype);
+
   MessageLite* ReleaseMessage(const FieldDescriptor* descriptor,
                               MessageFactory* factory);
 #undef desc
+  ::google::protobuf::Arena* GetArenaNoVirtual() const { return arena_; }
 
   // repeated fields -------------------------------------------------
 
@@ -421,12 +427,14 @@ class LIBPROTOBUF_EXPORT ExtensionSet {
     LazyMessageExtension() {}
     virtual ~LazyMessageExtension() {}
 
-    virtual LazyMessageExtension* New() const = 0;
+    virtual LazyMessageExtension* New(::google::protobuf::Arena* arena) const = 0;
     virtual const MessageLite& GetMessage(
         const MessageLite& prototype) const = 0;
     virtual MessageLite* MutableMessage(const MessageLite& prototype) = 0;
     virtual void SetAllocatedMessage(MessageLite *message) = 0;
     virtual MessageLite* ReleaseMessage(const MessageLite& prototype) = 0;
+    virtual MessageLite* UnsafeArenaReleaseMessage(
+        const MessageLite& prototype) = 0;
 
     virtual bool IsInitialized() const = 0;
     virtual int ByteSize() const = 0;
@@ -524,6 +532,9 @@ class LIBPROTOBUF_EXPORT ExtensionSet {
   };
 
 
+  // Merges existing Extension from other_extension
+  void InternalExtensionMergeFrom(int number, const Extension& other_extension);
+
   // Returns true and fills field_number and extension if extension is found.
   // Note to support packed repeated field compatibility, it also fills whether
   // the tag on wire is packed, which can be different from
@@ -569,7 +580,6 @@ class LIBPROTOBUF_EXPORT ExtensionSet {
                            ExtensionFinder* extension_finder,
                            MessageSetFieldSkipper* field_skipper);
 
-
   // Hack:  RepeatedPtrFieldBase declares ExtensionSet as a friend.  This
   //   friendship should automatically extend to ExtensionSet::Extension, but
   //   unfortunately some older compilers (e.g. GCC 3.4.4) do not implement this
@@ -587,7 +597,7 @@ class LIBPROTOBUF_EXPORT ExtensionSet {
   // for 100 elements or more.  Also, we want AppendToList() to order fields
   // by field number.
   std::map<int, Extension> extensions_;
-
+  ::google::protobuf::Arena* arena_;
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ExtensionSet);
 };
 
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