Implementation of SequencedTaskRunner based on SequencedWorkerPool.

base/threading/sequenced_task_runner_impl.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/threading/sequenced_task_runner_impl.h"
+
+#include "base/logging.h"
+#include "base/threading/sequenced_worker_pool.h"
+
+namespace base {
+
+SequencedTaskRunnerImpl::SequencedTaskRunnerImpl(
+    scoped_refptr<SequencedWorkerPool> pool,
+    SequencedWorkerPool::SequenceToken token)
+    : pool_(pool),
+      token_(token) {
+}
+
+SequencedTaskRunnerImpl::~SequencedTaskRunnerImpl() {
+}
+
+bool SequencedTaskRunnerImpl::PostDelayedTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    int64 delay_ms) {
+  return pool_->PostDelayedTask(from_here, task, delay_ms);

[akalin, 2012/03/19 09:34:21]

PostDelayedTask -> PostSequencedWorkerTask

[Francois, 2012/03/20 14:22:43]

Done.

+}
+
+bool SequencedTaskRunnerImpl::PostDelayedTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    TimeDelta delay) {
+  return pool_->PostDelayedTask(from_here, task, delay);

[akalin, 2012/03/19 09:34:21]

PostDelayedTask -> PostSequencedWorkerTask

[Francois, 2012/03/20 14:22:43]

Done.

+}
+
+bool SequencedTaskRunnerImpl::RunsTasksOnCurrentThread() const {
+  return pool_->RunsTasksOnCurrentThread();
+}
+
+bool SequencedTaskRunnerImpl::PostNonNestableDelayedTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    int64 delay_ms) {
+  // TODO(francoisk777@gmail.com): Change the following two statements once
+  // SequencedWorkerPool supports non-zero delays.
+  DLOG_IF(WARNING, delay_ms > 0) << "SequencedTaskRunnerImpl does not yet "
+      "support non-zero delays; ignoring delay of " << delay_ms << " ms";

[Francois, 2012/03/18 16:28:29]

I shouldn't have changed this back; I will fix it again in the next patch set.

[Francois, 2012/03/20 14:22:43]

Done.

+  return pool_->PostSequencedWorkerTask(token_, from_here, task);
+}
+
+bool SequencedTaskRunnerImpl::PostNonNestableDelayedTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    base::TimeDelta delay) {
+  // TODO(francoisk777@gmail.com): Change the following two statements once
+  // SequencedWorkerPool supports non-zero delays.
+  DLOG_IF(WARNING, delay.InMillisecondsRoundedUp() > 0)
+      << "SequencedTaskRunnerImpl does not yet support non-zero delays; "
+      "ignoring delay of " << delay.InMillisecondsRoundedUp();

[Francois, 2012/03/18 16:28:29]

I shouldn't have changed this back; I will fix it again in the next patch set.

[Francois, 2012/03/20 14:22:43]

Done.

+  return pool_->PostSequencedWorkerTask(token_, from_here, task);
+}
+
+}  // namespace base