1/*
2 * Copyright (C) 2016-2017 Apple Inc. All rights reserved.
3 * Copyright (C) 2018 Yusuke Suzuki <[email protected]>.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#if ENABLE(WEBASSEMBLY)
30
31#include "WasmSignature.h"
32
33namespace JSC { namespace Wasm {
34
35inline SignatureInformation& SignatureInformation::singleton()
36{
37 std::call_once(signatureInformationFlag, [] () {
38 theOne = new SignatureInformation;
39 });
40 return *theOne;
41}
42
43inline const Signature& SignatureInformation::get(SignatureIndex index)
44{
45 ASSERT(index != Signature::invalidIndex);
46 return *bitwise_cast<const Signature*>(index);
47}
48
49inline SignatureIndex SignatureInformation::get(const Signature& signature)
50{
51 if (!ASSERT_DISABLED) {
52 SignatureInformation& info = singleton();
53 auto locker = holdLock(info.m_lock);
54 ASSERT_UNUSED(info, info.m_signatureSet.contains(SignatureHash { makeRef(const_cast<Signature&>(signature)) }));
55 }
56 return bitwise_cast<SignatureIndex>(&signature);
57}
58
59} } // namespace JSC::Wasm
60
61#endif // ENABLE(WEBASSEMBLY)
62