| // Copyright 2013 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. |
| |
| #ifndef BASE_BARRIER_CLOSURE_H_ |
| #define BASE_BARRIER_CLOSURE_H_ |
| |
| #include "base/base_export.h" |
| #include "base/callback_forward.h" |
| |
| namespace base { |
| |
| // BarrierClosure executes |done_closure| after it has been invoked |
| // |num_closures| times. |
| // |
| // If |num_closures| is 0, |done_closure| is executed immediately. |
| // |
| // BarrierClosure is thread-safe - the count of remaining closures is |
| // maintained as a base::AtomicRefCount. |done_closure| will be run on |
| // the thread that calls the final Run() on the returned closures. |
| // |
| // |done_closure| is also Reset() on the final calling thread but due to the |
| // refcounted nature of callbacks, it is hard to know what thread resources |
| // will be released on. |
| BASE_EXPORT base::Closure BarrierClosure(int num_closures, |
| const base::Closure& done_closure); |
| |
| } // namespace base |
| |
| #endif // BASE_BARRIER_CLOSURE_H_ |