Callback: De-inline CallbackBase, and move to callback_helpers -> callback_internal.h

We can re-inline later if it starts being an issue.

BUG=none
TEST=unit-tests

Review URL: http://codereview.chromium.org/6542026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@75443 0039d316-1c4b-4281-b951-d872f2087c98

10 files changed, 76 insertions, 97 deletions

diff --git a/base/base.gypi b/base/base.gypi
index 79ba5f4..13cb1ba 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -42,7 +42,8 @@
           'bits.h',
           'bzip2_error_handler.cc',
           'callback.h',
-          'callback_helpers.h',
+          'callback_internal.cc',
+          'callback_internal.h',
           'callback_old.h',
           'command_line.cc',
           'command_line.h',
diff --git a/base/bind.h b/base/bind.h
index c23af2e..cd9eb19 100644
--- a/base/bind.h
+++ b/base/bind.h
@@ -12,7 +12,7 @@
 #pragma once
 
 #include "base/bind_internal.h"
-#include "base/callback_helpers.h"
+#include "base/callback_internal.h"
 
 // See base/callback.h for how to use these functions.
 //
diff --git a/base/bind.h.pump b/base/bind.h.pump
index fc7f246..62b313f 100644
--- a/base/bind.h.pump
+++ b/base/bind.h.pump
@@ -16,7 +16,7 @@ $var MAX_ARITY = 6
 #pragma once
 
 #include "base/bind_internal.h"
-#include "base/callback_helpers.h"
+#include "base/callback_internal.h"
 
 // See base/callback.h for how to use these functions.
 //
diff --git a/base/bind_internal.h b/base/bind_internal.h
index 62f2050..dd8afde 100644
--- a/base/bind_internal.h
+++ b/base/bind_internal.h
@@ -12,7 +12,7 @@
 #pragma once
 
 #include "base/bind_helpers.h"
-#include "base/callback_helpers.h"
+#include "base/callback_internal.h"
 #include "base/template_util.h"
 
 namespace base {
diff --git a/base/bind_internal.h.pump b/base/bind_internal.h.pump
index 132b0db..6fd95fe 100644
--- a/base/bind_internal.h.pump
+++ b/base/bind_internal.h.pump
@@ -16,7 +16,7 @@ $var MAX_ARITY = 6
 #pragma once
 
 #include "base/bind_helpers.h"
-#include "base/callback_helpers.h"
+#include "base/callback_internal.h"
 #include "base/template_util.h"
 
 namespace base {
diff --git a/base/callback.h b/base/callback.h
index 9e43afb..9c76aa5 100644
--- a/base/callback.h
+++ b/base/callback.h
@@ -11,7 +11,7 @@
 #define BASE_CALLBACK_H_
 #pragma once
 
-#include "base/callback_helpers.h"
+#include "base/callback_internal.h"
 #include "base/callback_old.h"
 
 // New, super-duper, unified Callback system.  This will eventually replace
@@ -212,49 +212,6 @@
 
 namespace base {
 
-namespace internal {
-
-// Holds the methods that don't require specialization to reduce template bloat.
-class CallbackBase {
- public:
-  // Returns true if Callback is null (doesn't refer to anything).
-  bool is_null() const {
-    return invoker_storage_.get() == NULL;
-  }
-
-  // Returns the Callback into an uninitalized state.
-  void Reset() {
-    invoker_storage_ = NULL;
-    polymorphic_invoke_ = NULL;
-  }
-
-  bool Equals(const CallbackBase& other) const {
-    return invoker_storage_.get() == other.invoker_storage_.get() &&
-           polymorphic_invoke_ == other.polymorphic_invoke_;
-  }
-
- protected:
-  // In C++, it is safe to cast function pointers to function pointers of
-  // another type. It is not okay to use void*. We create a InvokeFuncStorage
-  // that that can store our function pointer, and then cast it back to
-  // the original type on usage.
-  typedef void(*InvokeFuncStorage)(void);
-
-  CallbackBase(InvokeFuncStorage polymorphic_invoke,
-               scoped_refptr<InvokerStorageBase>* invoker_storage)
-      : polymorphic_invoke_(polymorphic_invoke) {
-    if (invoker_storage) {
-      invoker_storage_.swap(*invoker_storage);
-    }
-  }
-
-  scoped_refptr<InvokerStorageBase> invoker_storage_;
-  InvokeFuncStorage polymorphic_invoke_;
-};
-
-}  // namespace internal
-
-
 // First, we forward declare the Callback class template. This informs the
 // compiler that the template only has 1 type parameter which is the function
 // signature that the Callback is representing.
diff --git a/base/callback.h.pump b/base/callback.h.pump
index 19b7987..2efe0c5 100644
--- a/base/callback.h.pump
+++ b/base/callback.h.pump
@@ -15,7 +15,7 @@ $var MAX_ARITY = 6
 #define BASE_CALLBACK_H_
 #pragma once
 
-#include "base/callback_helpers.h"
+#include "base/callback_internal.h"
 #include "base/callback_old.h"
 
 // New, super-duper, unified Callback system.  This will eventually replace
@@ -216,49 +216,6 @@ $var MAX_ARITY = 6
 
 namespace base {
 
-namespace internal {
-
-// Holds the methods that don't require specialization to reduce template bloat.
-class CallbackBase {
- public:
-  // Returns true if Callback is null (doesn't refer to anything).
-  bool is_null() const {
-    return invoker_storage_.get() == NULL;
-  }
-
-  // Returns the Callback into an uninitalized state.
-  void Reset() {
-    invoker_storage_ = NULL;
-    polymorphic_invoke_ = NULL;
-  }
-
-  bool Equals(const CallbackBase& other) const {
-    return invoker_storage_.get() == other.invoker_storage_.get() &&
-           polymorphic_invoke_ == other.polymorphic_invoke_;
-  }
-
- protected:
-  // In C++, it is safe to cast function pointers to function pointers of
-  // another type. It is not okay to use void*. We create a InvokeFuncStorage
-  // that that can store our function pointer, and then cast it back to
-  // the original type on usage.
-  typedef void(*InvokeFuncStorage)(void);
-
-  CallbackBase(InvokeFuncStorage polymorphic_invoke,
-               scoped_refptr<InvokerStorageBase>* invoker_storage)
-      : polymorphic_invoke_(polymorphic_invoke) {
-    if (invoker_storage) {
-      invoker_storage_.swap(*invoker_storage);
-    }
-  }
-
-  scoped_refptr<InvokerStorageBase> invoker_storage_;
-  InvokeFuncStorage polymorphic_invoke_;
-};
-
-}  // namespace internal
-
-
 // First, we forward declare the Callback class template. This informs the
 // compiler that the template only has 1 type parameter which is the function
 // signature that the Callback is representing.
diff --git a/base/callback_internal.cc b/base/callback_internal.cc
new file mode 100644
index 0000000..979543e
--- /dev/null
+++ b/base/callback_internal.cc
@@ -0,0 +1,33 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/callback_internal.h"
+
+namespace base {
+namespace internal {
+
+bool CallbackBase::is_null() const {
+  return invoker_storage_.get() == NULL;
+}
+
+void CallbackBase::Reset() {
+  invoker_storage_ = NULL;
+  polymorphic_invoke_ = NULL;
+}
+
+bool CallbackBase::Equals(const CallbackBase& other) const {
+  return invoker_storage_.get() == other.invoker_storage_.get() &&
+         polymorphic_invoke_ == other.polymorphic_invoke_;
+}
+
+CallbackBase::CallbackBase(InvokeFuncStorage polymorphic_invoke,
+                           scoped_refptr<InvokerStorageBase>* invoker_storage)
+    : polymorphic_invoke_(polymorphic_invoke) {
+  if (invoker_storage) {
+    invoker_storage_.swap(*invoker_storage);
+  }
+}
+
+}  // namespace base
+}  // namespace internal
diff --git a/base/callback_helpers.h b/base/callback_internal.h
index 86b0df1..4f1d3c3 100644
--- a/base/callback_helpers.h
+++ b/base/callback_internal.h
@@ -5,8 +5,8 @@
 // This file contains utility functions and classes that help the
 // implementation, and management of the Callback objects.
 
-#ifndef BASE_CALLBACK_HELPERS_H_
-#define BASE_CALLBACK_HELPERS_H_
+#ifndef BASE_CALLBACK_INTERNAL_H_
+#define BASE_CALLBACK_INTERNAL_H_
 #pragma once
 
 #include "base/ref_counted.h"
@@ -49,7 +49,38 @@ InvokerStorageHolder<T> MakeInvokerStorageHolder(T* o) {
   return InvokerStorageHolder<T>(o);
 }
 
+// Holds the Callback methods that don't require specialization to reduce
+// template bloat.
+class CallbackBase {
+ public:
+  // Returns true if Callback is null (doesn't refer to anything).
+  bool is_null() const;
+
+  // Returns the Callback into an uninitalized state.
+  void Reset();
+
+  bool Equals(const CallbackBase& other) const;
+
+ protected:
+  // In C++, it is safe to cast function pointers to function pointers of
+  // another type. It is not okay to use void*. We create a InvokeFuncStorage
+  // that that can store our function pointer, and then cast it back to
+  // the original type on usage.
+  typedef void(*InvokeFuncStorage)(void);
+
+  CallbackBase(InvokeFuncStorage polymorphic_invoke,
+               scoped_refptr<InvokerStorageBase>* invoker_storage);
+
+  // Force the destructor to be instaniated inside this translation unit so
+  // that our subclasses will not get inlined versions.  Avoids more template
+  // bloat.
+  ~CallbackBase();
+
+  scoped_refptr<InvokerStorageBase> invoker_storage_;
+  InvokeFuncStorage polymorphic_invoke_;
+};
+
 }  // namespace internal
 }  // namespace base
 
-#endif  // BASE_CALLBACK_HELPERS_H_
+#endif  // BASE_CALLBACK_INTERNAL_H_
diff --git a/base/callback_unittest.cc b/base/callback_unittest.cc
index bf2b606..e41b399 100644
--- a/base/callback_unittest.cc
+++ b/base/callback_unittest.cc
@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 #include "base/callback.h"
-#include "base/callback_helpers.h"
+#include "base/callback_internal.h"
 #include "base/scoped_ptr.h"
 
 #include "testing/gtest/include/gtest/gtest.h"