1/*
2 * Copyright (C) 2019 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 "IsoHeap.h"
29#include "IsoPage.h"
30#include "IsoSharedConfig.h"
31
32namespace bmalloc {
33
34class IsoHeapImplBase;
35
36class IsoSharedPage : public IsoPageBase {
37public:
38 BEXPORT static IsoSharedPage* tryCreate();
39
40 template<typename Config, typename Type>
41 void free(const std::lock_guard<Mutex>&, api::IsoHeap<Type>&, void*);
42 VariadicBumpAllocator startAllocating();
43 void stopAllocating();
44
45private:
46 IsoSharedPage()
47 : IsoPageBase(true)
48 {
49 }
50};
51
52template<typename Config>
53uint8_t* indexSlotFor(void* ptr)
54{
55 BASSERT(IsoPageBase::pageFor(ptr)->isShared());
56 return static_cast<uint8_t*>(ptr) + Config::objectSize;
57}
58
59} // namespace bmalloc
60
61