1/*
2 * Copyright (C) 2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "RuntimeApplicationChecks.h"
28
29#include <wtf/NeverDestroyed.h>
30#include <wtf/Optional.h>
31#include <wtf/ProcessID.h>
32#include <wtf/RunLoop.h>
33
34namespace WebCore {
35
36#if !ASSERT_MSG_DISABLED
37static bool presentingApplicationPIDOverrideWasQueried;
38#endif
39
40static Optional<int>& presentingApplicationPIDOverride()
41{
42 static NeverDestroyed<Optional<int>> pid;
43#if !ASSERT_MSG_DISABLED
44 presentingApplicationPIDOverrideWasQueried = true;
45#endif
46 return pid;
47}
48
49int presentingApplicationPID()
50{
51 const auto& pid = presentingApplicationPIDOverride();
52 ASSERT(!pid || RunLoop::isMain());
53 return pid ? pid.value() : getCurrentProcessID();
54}
55
56void setPresentingApplicationPID(int pid)
57{
58 ASSERT(RunLoop::isMain());
59 ASSERT_WITH_MESSAGE(!presentingApplicationPIDOverrideWasQueried, "presentingApplicationPID() should not be called before setPresentingApplicationPID()");
60 presentingApplicationPIDOverride() = pid;
61}
62
63} // namespace WebCore
64