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| 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/mac/libdispatch_task_runner.h" |
| 6 |
| 7 #include "base/callback.h" |
| 8 |
| 9 namespace base { |
| 10 namespace mac { |
| 11 |
| 12 LibDispatchTaskRunner::LibDispatchTaskRunner(const char* name) |
| 13 : queue_(dispatch_queue_create(name, NULL)) { |
| 14 } |
| 15 |
| 16 bool LibDispatchTaskRunner::PostDelayedTask( |
| 17 const tracked_objects::Location& from_here, |
| 18 const Closure& task, |
| 19 base::TimeDelta delay) { |
| 20 if (!queue_) |
| 21 return false; |
| 22 |
| 23 // The block runtime would implicitly copy the reference, not the object |
| 24 // it's referencing. Copy the closure into block storage so it's available |
| 25 // to run. |
| 26 __block const Closure task_copy = task; |
| 27 void(^run_task)(void) = ^{ |
| 28 task_copy.Run(); |
| 29 }; |
| 30 |
| 31 int64 delay_nano = |
| 32 delay.InMicroseconds() * base::Time::kNanosecondsPerMicrosecond; |
| 33 if (delay_nano > 0) { |
| 34 dispatch_time_t time = dispatch_time(DISPATCH_TIME_NOW, delay_nano); |
| 35 dispatch_after(time, queue_, run_task); |
| 36 } else { |
| 37 dispatch_async(queue_, run_task); |
| 38 } |
| 39 return true; |
| 40 } |
| 41 |
| 42 bool LibDispatchTaskRunner::RunsTasksOnCurrentThread() const { |
| 43 return queue_ == dispatch_get_current_queue(); |
| 44 } |
| 45 |
| 46 bool LibDispatchTaskRunner::PostNonNestableDelayedTask( |
| 47 const tracked_objects::Location& from_here, |
| 48 const Closure& task, |
| 49 base::TimeDelta delay) { |
| 50 return PostDelayedTask(from_here, task, delay); |
| 51 } |
| 52 |
| 53 dispatch_queue_t LibDispatchTaskRunner::GetDispatchQueue() const { |
| 54 return queue_; |
| 55 } |
| 56 |
| 57 LibDispatchTaskRunner::~LibDispatchTaskRunner() { |
| 58 dispatch_release(queue_); |
| 59 } |
| 60 |
| 61 } // namespace mac |
| 62 } // namespace base |
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