mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 08:16:09 +03:00
52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
// 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.
|
|
|
|
#include "base/barrier_closure.h"
|
|
|
|
#include <utility>
|
|
|
|
#include "base/atomic_ref_count.h"
|
|
#include "base/bind.h"
|
|
#include "base/memory/ptr_util.h"
|
|
|
|
namespace base {
|
|
namespace {
|
|
|
|
// Maintains state for a BarrierClosure.
|
|
class BarrierInfo {
|
|
public:
|
|
BarrierInfo(int num_callbacks_left, OnceClosure done_closure);
|
|
void Run();
|
|
|
|
private:
|
|
AtomicRefCount num_callbacks_left_;
|
|
OnceClosure done_closure_;
|
|
};
|
|
|
|
BarrierInfo::BarrierInfo(int num_callbacks, OnceClosure done_closure)
|
|
: num_callbacks_left_(num_callbacks),
|
|
done_closure_(std::move(done_closure)) {}
|
|
|
|
void BarrierInfo::Run() {
|
|
DCHECK(!num_callbacks_left_.IsZero());
|
|
if (!num_callbacks_left_.Decrement())
|
|
std::move(done_closure_).Run();
|
|
}
|
|
|
|
} // namespace
|
|
|
|
RepeatingClosure BarrierClosure(int num_callbacks_left,
|
|
OnceClosure done_closure) {
|
|
DCHECK_GE(num_callbacks_left, 0);
|
|
|
|
if (num_callbacks_left == 0)
|
|
std::move(done_closure).Run();
|
|
|
|
return BindRepeating(
|
|
&BarrierInfo::Run,
|
|
Owned(new BarrierInfo(num_callbacks_left, std::move(done_closure))));
|
|
}
|
|
|
|
} // namespace base
|