e8374479f4
This is the set of changes required for snmalloc2 to be usable by the process sandboxing code and incorporates some API changes that reduce the amount of code required to embed snmalloc. Highlights: - Merge the config and back-end classes. - Everything in config is now global (all methods are static) - The GlobalState class is gone (all global state is managed by global methods on the config class) - LocalState is now a member of the config class, all methods are instance methods. - Not every configuration needs to use the lazy initialisation hooks. They now need to be provided only if they are used. If the configuration does not provide an `ensure_init` method, it is not called. If it does not provide an `is_initialised` method then the global initialisation state is not checked. - There is now an `snmalloc::Options` class that default initialises itself to the default behaviour. Every configuration must provide a `constexpr` instance of this class. Each flag can be separately overridden and new flags can be added without breaking any existing API consumers. The config classes are moved into the backend directory.
52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
#pragma once
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#include "../backend/backend.h"
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#include "../mem/corealloc.h"
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#include "../mem/pool.h"
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#include "../mem/slaballocator.h"
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#include "commonconfig.h"
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namespace snmalloc
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{
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/**
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* A single fixed address range allocator configuration
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*/
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template<SNMALLOC_CONCEPT(ConceptPAL) PAL>
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class FixedGlobals final : public BackendAllocator<PAL, true>
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{
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private:
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using Backend = BackendAllocator<PAL, true>;
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inline static ChunkAllocatorState slab_allocator_state;
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inline static PoolState<CoreAllocator<FixedGlobals>> alloc_pool;
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public:
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static ChunkAllocatorState&
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get_slab_allocator_state(typename Backend::LocalState*)
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{
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return slab_allocator_state;
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}
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static PoolState<CoreAllocator<FixedGlobals>>& pool()
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{
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return alloc_pool;
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}
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static constexpr Flags Options{};
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// This needs to be a forward reference as the
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// thread local state will need to know about this.
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// This may allocate, so must be called once a thread
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// local allocator exists.
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static void register_clean_up()
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{
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snmalloc::register_clean_up();
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}
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static void init(void* base, size_t length)
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{
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Backend::init(base, length);
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}
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};
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}
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