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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <wtf/ScopedLambda.h>
29#include <wtf/Threading.h>
30
31namespace WTF {
32
33using ThreadMessage = ScopedLambda<void(PlatformRegisters&)>;
34
35enum class MessageStatus {
36 MessageRan,
37 ThreadExited,
38};
39
40// This method allows us to send a message which will be run in a signal handler on the desired thread.
41// There are several caveates to this method however, This function uses signals so your message should
42// be sync signal safe.
43WTF_EXPORT_PRIVATE MessageStatus sendMessageScoped(Thread&, const ThreadMessage&);
44
45template<typename Functor>
46MessageStatus sendMessage(Thread& targetThread, const Functor& func)
47{
48 auto lambda = scopedLambdaRef<void(PlatformRegisters&)>(func);
49 return sendMessageScoped(targetThread, lambda);
50}
51
52} // namespace WTF
53
54using WTF::sendMessage;
55