base/task_runner.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/task_runner.h"
   6
   7 #include "base/compiler_specific.h"
   8 #include "base/logging.h"
   9 #include "base/threading/post_task_and_reply_impl.h"
  10
  11 namespace base {
  12
  13 namespace {
  14
  15 // TODO(akalin): There's only one other implementation of
  16 // PostTaskAndReplyImpl in WorkerPool.  Investigate whether it'll be
  17 // possible to merge the two.
  18 class PostTaskAndReplyTaskRunner : public internal::PostTaskAndReplyImpl {
  19  public:
  20   PostTaskAndReplyTaskRunner(TaskRunner* destination);
  21
  22  private:
  23   virtual bool PostTask(const tracked_objects::Location& from_here,
  24                         const Closure& task) OVERRIDE;
  25
  26   // Non-owning.
  27   TaskRunner* destination_;
  28 };
  29
  30 PostTaskAndReplyTaskRunner::PostTaskAndReplyTaskRunner(
  31     TaskRunner* destination) : destination_(destination) {
  32   DCHECK(destination_);
  33 }
  34
  35 bool PostTaskAndReplyTaskRunner::PostTask(
  36     const tracked_objects::Location& from_here,
  37     const Closure& task) {
  38   return destination_->PostTask(from_here, task);
  39 }
  40
  41 }  // namespace
  42
  43 bool TaskRunner::PostTask(const tracked_objects::Location& from_here,
  44                           const Closure& task) {
  45   return PostDelayedTask(from_here, task, 0);
  46 }
  47
  48 bool TaskRunner::PostTaskAndReply(
  49     const tracked_objects::Location& from_here,
  50     const Closure& task,
  51     const Closure& reply) {
  52   return PostTaskAndReplyTaskRunner(this).PostTaskAndReply(
  53       from_here, task, reply);
  54 }
  55
  56 TaskRunner::TaskRunner() {}
  57
  58 TaskRunner::~TaskRunner() {}
  59
  60 void TaskRunner::OnDestruct() const {
  61   delete this;
  62 }
  63
  64 void TaskRunnerTraits::Destruct(const TaskRunner* task_runner) {
  65   task_runner->OnDestruct();
  66 }
  67
  68 }  // namespace base