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 <utility>
   8
   9 #include "base/compiler_specific.h"
  10 #include "base/logging.h"
  11 #include "base/threading/post_task_and_reply_impl.h"
  12
  13 namespace base {
  14
  15 namespace {
  16
  17 // TODO(akalin): There's only one other implementation of
  18 // PostTaskAndReplyImpl in WorkerPool.  Investigate whether it'll be
  19 // possible to merge the two.
  20 class PostTaskAndReplyTaskRunner : public internal::PostTaskAndReplyImpl {
  21  public:
  22   explicit PostTaskAndReplyTaskRunner(TaskRunner* destination);
  23
  24  private:
  25   bool PostTask(const Location& from_here, OnceClosure task) override;
  26
  27   // Non-owning.
  28   TaskRunner* destination_;
  29 };
  30
  31 PostTaskAndReplyTaskRunner::PostTaskAndReplyTaskRunner(
  32     TaskRunner* destination) : destination_(destination) {
  33   DCHECK(destination_);
  34 }
  35
  36 bool PostTaskAndReplyTaskRunner::PostTask(const Location& from_here,
  37                                           OnceClosure task) {
  38   return destination_->PostTask(from_here, std::move(task));
  39 }
  40
  41 }  // namespace
  42
  43 bool TaskRunner::PostTask(const Location& from_here, OnceClosure task) {
  44   return PostDelayedTask(from_here, std::move(task), base::TimeDelta());
  45 }
  46
  47 bool TaskRunner::PostTaskAndReply(const Location& from_here,
  48                                   OnceClosure task,
  49                                   OnceClosure reply) {
  50   return PostTaskAndReplyTaskRunner(this).PostTaskAndReply(
  51       from_here, std::move(task), std::move(reply));
  52 }
  53
  54 TaskRunner::TaskRunner() = default;
  55
  56 TaskRunner::~TaskRunner() = default;
  57
  58 void TaskRunner::OnDestruct() const {
  59   delete this;
  60 }
  61
  62 void TaskRunnerTraits::Destruct(const TaskRunner* task_runner) {
  63   task_runner->OnDestruct();
  64 }
  65
  66 }  // namespace base