1/*
2 * Copyright (C) 2013 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#ifndef ImportanceAssertion_h
27#define ImportanceAssertion_h
28
29#if PLATFORM(MAC) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
30
31#if __has_include(<libproc_internal.h>)
32#include <libproc_internal.h>
33#endif
34
35extern "C" int proc_importance_assertion_begin_with_msg(mach_msg_header_t*, mach_msg_trailer_t*, uint64_t*);
36extern "C" int proc_importance_assertion_complete(uint64_t assertion_handle);
37
38namespace IPC {
39
40class ImportanceAssertion {
41    WTF_MAKE_NONCOPYABLE(ImportanceAssertion);
42
43public:
44    explicit ImportanceAssertion(mach_msg_header_t* header)
45        : m_assertion(0)
46    {
47#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 101000
48        proc_denap_assertion_begin_with_msg(header, &m_assertion);
49#else
50        proc_importance_assertion_begin_with_msg(header, 0, &m_assertion);
51#endif
52    }
53
54    ~ImportanceAssertion()
55    {
56#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 101000
57        proc_denap_assertion_complete(m_assertion);
58#else
59        proc_importance_assertion_complete(m_assertion);
60#endif
61    }
62
63private:
64    uint64_t m_assertion;
65};
66
67}
68
69#endif // PLATFORM(MAC) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
70
71#endif // ImportanceAssertion_h
72