/* * Copyright (C) 2018 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #include "AllocationFailureMode.h" #include <climits> namespace JSC { class GCDeferralContext; class Heap; class VM; class Allocator { public: Allocator() { } explicit Allocator(unsigned offset) : m_offset(offset) { } void* allocate(VM&, GCDeferralContext*, AllocationFailureMode) const; // This version calls FailureFunc if we have a null allocator or if the TLC hasn't been resized // to include this allocator. template<typename FailureFunc> void* tryAllocate(VM&, GCDeferralContext*, AllocationFailureMode, const FailureFunc&) const; unsigned cellSize(Heap&) const; unsigned offset() const { return m_offset; } bool operator==(const Allocator& other) const { return m_offset == other.offset(); } bool operator!=(const Allocator& other) const { return !(*this == other); } explicit operator bool() const { return *this != Allocator(); } private: unsigned m_offset { UINT_MAX }; }; } // namespace JSC