Rename SequencedWorkerPoolTaskRunner to SequencedWorkerPoolSequencedTaskRunner.

base/threading/sequenced_worker_pool.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_worker_pool.h"
 
 #include <list>
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
 
 #include "base/atomicops.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
 #include "base/message_loop_proxy.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "base/stringprintf.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/platform_thread.h"
-#include "base/threading/sequenced_worker_pool_task_runner.h"
 #include "base/threading/simple_thread.h"
 #include "base/time.h"
 #include "base/tracked_objects.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
 #endif
 
 namespace base {
 
 namespace {
 
 struct SequencedTask {
   SequencedTask()
       : sequence_token_id(0),
         shutdown_behavior(SequencedWorkerPool::BLOCK_SHUTDOWN) {}
 
   ~SequencedTask() {}
 
   int sequence_token_id;
   SequencedWorkerPool::WorkerShutdown shutdown_behavior;
   tracked_objects::Location location;
   Closure task;
 };
 
+// SequencedWorkerPoolSequencedTaskRunner ------------------------------------
+// A SequencedTaskRunner which posts tasks to a SequencedWorkerPool with a
+// fixed sequence token.
+//
+// Note that this class is RefCountedThreadSafe (inherited from TaskRunner).
+class SequencedWorkerPoolSequencedTaskRunner : public SequencedTaskRunner {
+ public:
+  SequencedWorkerPoolSequencedTaskRunner(
+      const scoped_refptr<SequencedWorkerPool>& pool,
+      SequencedWorkerPool::SequenceToken token);
+
+  // TaskRunner implementation
+  virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
+                               const Closure& task,
+                               int64 delay_ms) OVERRIDE;
+  virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
+                               const Closure& task,
+                               TimeDelta delay) OVERRIDE;
+  virtual bool RunsTasksOnCurrentThread() const OVERRIDE;
+
+  // SequencedTaskRunner implementation
+  virtual bool PostNonNestableDelayedTask(
+      const tracked_objects::Location& from_here,
+      const Closure& task,
+      int64 delay_ms) OVERRIDE;
+  virtual bool PostNonNestableDelayedTask(
+      const tracked_objects::Location& from_here,
+      const Closure& task,
+      TimeDelta delay) OVERRIDE;
+
+ private:
+  virtual ~SequencedWorkerPoolSequencedTaskRunner();
+
+  // Helper function for posting a delayed task. Asserts that the delay is
+  // zero because non-zero delays are not yet supported.
+  bool PostDelayedTaskAssertZeroDelay(
+      const tracked_objects::Location& from_here,
+      const Closure& task,
+      int64 delay_ms);
+  bool PostDelayedTaskAssertZeroDelay(
+      const tracked_objects::Location& from_here,
+      const Closure& task,
+      TimeDelta delay);
+
+  const scoped_refptr<SequencedWorkerPool> pool_;
+
+  const SequencedWorkerPool::SequenceToken token_;
+
+  DISALLOW_COPY_AND_ASSIGN(SequencedWorkerPoolSequencedTaskRunner);
+};
+
+SequencedWorkerPoolSequencedTaskRunner::SequencedWorkerPoolSequencedTaskRunner(
+    const scoped_refptr<SequencedWorkerPool>& pool,
+    SequencedWorkerPool::SequenceToken token)
+    : pool_(pool),
+      token_(token) {
+}
+
+SequencedWorkerPoolSequencedTaskRunner::
+~SequencedWorkerPoolSequencedTaskRunner() {
+}
+
+bool SequencedWorkerPoolSequencedTaskRunner::PostDelayedTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    int64 delay_ms) {
+  return PostDelayedTaskAssertZeroDelay(from_here, task, delay_ms);
+}
+
+bool SequencedWorkerPoolSequencedTaskRunner::PostDelayedTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    TimeDelta delay) {
+  return PostDelayedTaskAssertZeroDelay(from_here, task, delay);
+}
+
+bool SequencedWorkerPoolSequencedTaskRunner::RunsTasksOnCurrentThread() const {
+  return pool_->IsRunningSequenceOnCurrentThread(token_);
+}
+
+bool SequencedWorkerPoolSequencedTaskRunner::PostNonNestableDelayedTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    int64 delay_ms) {
+  return PostDelayedTaskAssertZeroDelay(from_here, task, delay_ms);
+}
+
+bool SequencedWorkerPoolSequencedTaskRunner::PostNonNestableDelayedTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    TimeDelta delay) {
+  return PostDelayedTaskAssertZeroDelay(from_here, task, delay);
+}
+
+bool SequencedWorkerPoolSequencedTaskRunner::PostDelayedTaskAssertZeroDelay(
+    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.
+  DCHECK_EQ(delay_ms, 0)
+      << "SequencedWorkerPoolSequencedTaskRunner does not yet support non-zero"
+         " delays";
+  return pool_->PostSequencedWorkerTask(token_, from_here, task);
+}
+
+bool SequencedWorkerPoolSequencedTaskRunner::PostDelayedTaskAssertZeroDelay(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    TimeDelta delay) {
+  return PostDelayedTaskAssertZeroDelay(from_here,
+                                        task,
+                                        delay.InMillisecondsRoundedUp());
+}
+
 }  // namespace
 
 // Worker ---------------------------------------------------------------------
 
 class SequencedWorkerPool::Worker : public SimpleThread {
  public:
   // Hold a (cyclic) ref to |worker_pool|, since we want to keep it
   // around as long as we are running.
   Worker(const scoped_refptr<SequencedWorkerPool>& worker_pool,
          int thread_number,
@@ skipping 693 matching lines @@
   return inner_->GetSequenceToken();
 }
 
 SequencedWorkerPool::SequenceToken SequencedWorkerPool::GetNamedSequenceToken(
     const std::string& name) {
   return inner_->GetNamedSequenceToken(name);
 }
 
 scoped_refptr<SequencedTaskRunner> SequencedWorkerPool::GetSequencedTaskRunner(
     SequenceToken token) {
-  return new SequencedWorkerPoolTaskRunner(this, token);
+  return new SequencedWorkerPoolSequencedTaskRunner(this, token);
 }
 
 bool SequencedWorkerPool::PostWorkerTask(
     const tracked_objects::Location& from_here,
     const Closure& task) {
   return inner_->PostTask(NULL, SequenceToken(), BLOCK_SHUTDOWN,
                           from_here, task);
 }
 
 bool SequencedWorkerPool::PostWorkerTaskWithShutdownBehavior(
@@ skipping 64 matching lines @@
 void SequencedWorkerPool::SignalHasWorkForTesting() {
   inner_->SignalHasWorkForTesting();
 }
 
 void SequencedWorkerPool::Shutdown() {
   DCHECK(constructor_message_loop_->BelongsToCurrentThread());
   inner_->Shutdown();
 }
 
 }  // namespace base