/* * Copyright (C) 2017 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 "IsoConfig.h" #include "Mutex.h" namespace bmalloc { template<typename Config> class IsoHeapImpl; namespace api { // You have to declare IsoHeaps this way: // // static IsoHeap<type> myTypeHeap; // // It's not valid to create an IsoHeap except in static storage. template<typename Type> struct IsoHeap { typedef IsoConfig<sizeof(Type)> Config; void* allocate(); void* tryAllocate(); void deallocate(void* p); void scavenge(); bool isInitialized(); unsigned allocatorOffset() { return m_allocatorOffsetPlusOne - 1; } void setAllocatorOffset(unsigned value) { m_allocatorOffsetPlusOne = value + 1; } unsigned deallocatorOffset() { return m_deallocatorOffsetPlusOne - 1; } void setDeallocatorOffset(unsigned value) { m_deallocatorOffsetPlusOne = value + 1; } IsoHeapImpl<Config>& impl(); Mutex m_initializationLock; unsigned m_allocatorOffsetPlusOne; unsigned m_deallocatorOffsetPlusOne; IsoHeapImpl<Config>* m_impl; }; // Use this together with MAKE_BISO_MALLOCED_IMPL. #define MAKE_BISO_MALLOCED(isoType) \ public: \ static ::bmalloc::api::IsoHeap<isoType>& bisoHeap(); \ \ void* operator new(size_t, void* p) { return p; } \ void* operator new[](size_t, void* p) { return p; } \ \ void* operator new(size_t size);\ void operator delete(void* p);\ \ void* operator new[](size_t size) = delete; \ void operator delete[](void* p) = delete; \ private: \ typedef int __makeBisoMallocedMacroSemicolonifier } } // namespace bmalloc::api