1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_DEVTOOLS_CROSS_THREAD_PROTOCOL_CALLBACK_H_
#define CONTENT_BROWSER_DEVTOOLS_CROSS_THREAD_PROTOCOL_CALLBACK_H_
#include <memory>
#include "content/public/browser/browser_thread.h"
namespace content {
// A wrapper for a DevTools protocol method callback that assures the
// underlying callback is called on the correct thread. Use this to pass
// the protocol callback to methods handling DevTools commands on threads
// other than UI.
template <typename ProtocolCallback>
class CrossThreadProtocolCallback {
public:
explicit CrossThreadProtocolCallback(
std::unique_ptr<ProtocolCallback> callback)
: callback_(std::move(callback)) {}
CrossThreadProtocolCallback(CrossThreadProtocolCallback&& r) = default;
template <typename... Args>
void sendSuccess(Args&&... args) {
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&ProtocolCallback::sendSuccess, std::move(callback_),
std::forward<Args>(args)...));
}
void sendFailure(protocol::DispatchResponse response) {
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(&ProtocolCallback::sendFailure,
std::move(callback_), std::move(response)));
}
~CrossThreadProtocolCallback() {
BrowserThread::DeleteSoon({BrowserThread::UI}, FROM_HERE,
std::move(callback_));
}
private:
std::unique_ptr<ProtocolCallback> callback_;
};
template <typename ProtocolCallback>
CrossThreadProtocolCallback<ProtocolCallback> WrapForAnotherThread(
std::unique_ptr<ProtocolCallback> callback) {
return CrossThreadProtocolCallback<ProtocolCallback>(std::move(callback));
}
} // namespace content
#endif // CONTENT_BROWSER_DEVTOOLS_CROSS_THREAD_PROTOCOL_CALLBACK_H_
|
