groby@chromium.org | 042aa75 | 2013-08-25 00:00:33 +0900 | [diff] [blame] | 1 | // Copyright 2013 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 | #ifndef BASE_BARRIER_CLOSURE_H_ |
| 6 | #define BASE_BARRIER_CLOSURE_H_ |
| 7 | |
| 8 | #include "base/base_export.h" |
| 9 | #include "base/callback_forward.h" |
| 10 | |
| 11 | namespace base { |
| 12 | |
| 13 | // BarrierClosure executes |done_closure| after it has been invoked |
| 14 | // |num_closures| times. |
| 15 | // |
| 16 | // If |num_closures| is 0, |done_closure| is executed immediately. |
| 17 | // |
| 18 | // BarrierClosure is thread-safe - the count of remaining closures is |
| 19 | // maintained as a base::AtomicRefCount. |done_closure| will be run on |
| 20 | // the thread that calls the final Run() on the returned closures. |
| 21 | // |
| 22 | // |done_closure| is also Reset() on the final calling thread but due to the |
| 23 | // refcounted nature of callbacks, it is hard to know what thread resources |
| 24 | // will be released on. |
| 25 | BASE_EXPORT base::Closure BarrierClosure(int num_closures, |
| 26 | const base::Closure& done_closure); |
| 27 | |
| 28 | } // namespace base |
| 29 | |
hans@chromium.org | 92df995 | 2013-09-13 04:48:15 +0900 | [diff] [blame] | 30 | #endif // BASE_BARRIER_CLOSURE_H_ |