Make new TaskRunner, SequencedTaskRunner, and SingleThreadTaskRunner interfaces

base/executor.cc

+// Copyright (c) 2012 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/executor.h"
+
+#include "base/bind.h"
+#include "base/compiler_specific.h"
+#include "base/threading/post_task_and_reply_impl.h"
+
+namespace base {
+
+namespace {
+
+class PostTaskAndReplyExecutor : public internal::PostTaskAndReplyImpl {

[willchan no longer on Chromium, 2012/02/01 10:34:11]

The plan is to get rid of internal::PostTaskAndReplyImpl eventually, right?
Since we should only have one implementation and it should live here. If that
sounds right to you, can you leave a TODO?

+ public:
+  PostTaskAndReplyExecutor(Executor* destination);
+
+ private:
+  virtual bool PostTask(const tracked_objects::Location& from_here,
+                        const Closure& task) OVERRIDE;
+
+  // Non-owning.
+  Executor* destination_;
+};
+
+PostTaskAndReplyExecutor::PostTaskAndReplyExecutor(
+    Executor* destination) : destination_(destination) {}
+
+bool PostTaskAndReplyExecutor::PostTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task) {
+  return destination_->PostTask(from_here, task);
+}
+
+}  // namespace
+
+bool Executor::PostTaskAndReply(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    const Closure& reply) {
+  return PostTaskAndReplyExecutor(this).PostTaskAndReply(
+      from_here, task, reply);
+}
+
+Executor::Executor() {}
+
+Executor::~Executor() {}
+
+void Executor::OnDestruct() const {
+  delete this;
+}
+
+void ExecutorTraits::Destruct(const Executor* executor) {
+  executor->OnDestruct();
+}
+
+bool Executor::DeleteSoonInternal(
+    const tracked_objects::Location& from_here,
+    void(*deleter)(const void*),
+    const void* object) {
+  return PostNonNestableTask(from_here, Bind(deleter, object));
+}
+
+bool Executor::ReleaseSoonInternal(
+    const tracked_objects::Location& from_here,
+    void(*releaser)(const void*),
+    const void* object) {
+  return PostNonNestableTask(from_here, Bind(releaser, object));
+}
+
+}  // namespace base