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
58
59
60
61
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsEdgeMigrationUtils.h"
#include "mozilla/dom/Promise.h"
#include "nsCOMPtr.h"
#include "nsIEventTarget.h"
#include <windows.h>
namespace mozilla {
NS_IMPL_ISUPPORTS(nsEdgeMigrationUtils, nsIEdgeMigrationUtils)
NS_IMETHODIMP
nsEdgeMigrationUtils::IsDbLocked(nsIFile* aFile, JSContext* aCx,
dom::Promise** aPromise) {
NS_ENSURE_ARG_POINTER(aFile);
nsString path;
nsresult rv = aFile->GetPath(path);
NS_ENSURE_SUCCESS(rv, rv);
ErrorResult err;
RefPtr<dom::Promise> promise =
dom::Promise::Create(xpc::CurrentNativeGlobal(aCx), err);
if (MOZ_UNLIKELY(err.Failed())) {
return err.StealNSResult();
}
nsMainThreadPtrHandle<dom::Promise> promiseHolder(
new nsMainThreadPtrHolder<dom::Promise>("nsEdgeMigrationUtils Promise",
promise));
NS_DispatchBackgroundTask(NS_NewRunnableFunction(
__func__,
[promiseHolder = std::move(promiseHolder), path = std::move(path)]() {
HANDLE file = ::CreateFileW(path.get(), GENERIC_READ, FILE_SHARE_READ,
nullptr, OPEN_EXISTING, 0, nullptr);
bool locked = true;
if (file != INVALID_HANDLE_VALUE) {
locked = false;
::CloseHandle(file);
}
NS_DispatchToMainThread(NS_NewRunnableFunction(
__func__, [promiseHolder = std::move(promiseHolder), locked]() {
promiseHolder.get()->MaybeResolve(locked);
}));
}));
promise.forget(aPromise);
return NS_OK;
}
} // namespace mozilla
|
