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https://github.com/ziglang/zig.git
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edb210905d
- split util_base.hpp from util.hpp - new namespaces: `mem` and `heap` - new `mem::Allocator` interface - new `heap::CAllocator` impl with global `heap::c_allocator` - new `heap::ArenaAllocator` impl - new `mem::TypeInfo` extracts names without RTTI - name extraction is enabled w/ ZIG_ENABLE_MEM_PROFILE=1 - new `mem::List` takes explicit `Allocator&` parameter - new `mem::HashMap` takes explicit `Allocator&` parameter - add Codegen.pass1_arena and use for all `ZigValue` allocs - deinit Codegen.pass1_arena early in `zig_llvm_emit_output()`
102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
/*
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* Copyright (c) 2020 Andrew Kelley
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*
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* This file is part of zig, which is MIT licensed.
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* See http://opensource.org/licenses/MIT
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*/
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#ifndef ZIG_HEAP_HPP
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#define ZIG_HEAP_HPP
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#include "config.h"
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#include "util_base.hpp"
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#include "mem.hpp"
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#ifdef ZIG_ENABLE_MEM_PROFILE
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namespace mem {
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struct Profile;
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}
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#endif
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namespace heap {
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struct BootstrapAllocator final : mem::Allocator {
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void init(const char *name);
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void deinit();
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void destruct(Allocator *allocator) {}
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private:
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ATTRIBUTE_RETURNS_NOALIAS void *internal_allocate(const mem::TypeInfo &info, size_t count) final;
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ATTRIBUTE_RETURNS_NOALIAS void *internal_allocate_nonzero(const mem::TypeInfo &info, size_t count) final;
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void *internal_reallocate(const mem::TypeInfo &info, void *old_ptr, size_t old_count, size_t new_count) final;
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void *internal_reallocate_nonzero(const mem::TypeInfo &info, void *old_ptr, size_t old_count, size_t new_count) final;
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void internal_deallocate(const mem::TypeInfo &info, void *ptr, size_t count) final;
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};
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struct CAllocator final : mem::Allocator {
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void init(const char *name);
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void deinit();
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static CAllocator *construct(mem::Allocator *allocator, const char *name);
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void destruct(mem::Allocator *allocator) final;
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#ifdef ZIG_ENABLE_MEM_PROFILE
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void print_report(FILE *file = nullptr);
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#endif
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private:
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ATTRIBUTE_RETURNS_NOALIAS void *internal_allocate(const mem::TypeInfo &info, size_t count) final;
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ATTRIBUTE_RETURNS_NOALIAS void *internal_allocate_nonzero(const mem::TypeInfo &info, size_t count) final;
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void *internal_reallocate(const mem::TypeInfo &info, void *old_ptr, size_t old_count, size_t new_count) final;
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void *internal_reallocate_nonzero(const mem::TypeInfo &info, void *old_ptr, size_t old_count, size_t new_count) final;
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void internal_deallocate(const mem::TypeInfo &info, void *ptr, size_t count) final;
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#ifdef ZIG_ENABLE_MEM_PROFILE
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mem::Profile *profile;
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#endif
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};
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//
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// arena allocator
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//
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// - allocations are backed by the underlying allocator's memory
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// - allocations are N:1 relationship to underlying allocations
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// - dellocations are noops
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// - deinit() releases all underlying memory
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//
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struct ArenaAllocator final : mem::Allocator {
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void init(Allocator *backing, const char *name);
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void deinit();
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static ArenaAllocator *construct(mem::Allocator *allocator, mem::Allocator *backing, const char *name);
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void destruct(mem::Allocator *allocator) final;
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#ifdef ZIG_ENABLE_MEM_PROFILE
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void print_report(FILE *file = nullptr);
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#endif
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private:
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ATTRIBUTE_RETURNS_NOALIAS void *internal_allocate(const mem::TypeInfo &info, size_t count) final;
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ATTRIBUTE_RETURNS_NOALIAS void *internal_allocate_nonzero(const mem::TypeInfo &info, size_t count) final;
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void *internal_reallocate(const mem::TypeInfo &info, void *old_ptr, size_t old_count, size_t new_count) final;
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void *internal_reallocate_nonzero(const mem::TypeInfo &info, void *old_ptr, size_t old_count, size_t new_count) final;
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void internal_deallocate(const mem::TypeInfo &info, void *ptr, size_t count) final;
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#ifdef ZIG_ENABLE_MEM_PROFILE
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mem::Profile *profile;
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#endif
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struct Impl;
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Impl *impl;
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};
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extern BootstrapAllocator bootstrap_allocator_state;
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extern mem::Allocator &bootstrap_allocator;
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extern CAllocator c_allocator_state;
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extern mem::Allocator &c_allocator;
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} // namespace heap
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#endif
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