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Geoff RomerandJon Meow
d5124256a2
- Move Heap and Frame/Scope to their own headers. - Move some functions to more appropriate headers (e.g. CopyValue -> value.h). - Define a separate Bazel rule for each header/cpp pair. - Modify PrintValue to not print the frames of a ContinuationValue. This was necessary to break a dependency cycle between PrintValue, PrintFrame, and Action::Print. Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef EXECUTABLE_SEMANTICS_INTERPRETER_MEMORY_H_
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#define EXECUTABLE_SEMANTICS_INTERPRETER_MEMORY_H_
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#include <ostream>
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#include <vector>
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#include "executable_semantics/interpreter/address.h"
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#include "executable_semantics/interpreter/value.h"
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namespace Carbon {
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// A Heap represents the abstract machine's dynamically allocated memory.
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class Heap {
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public:
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// Constructs an empty Heap.
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Heap() = default;
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Heap(const Heap&) = delete;
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Heap& operator=(const Heap&) = delete;
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// Returns the value at the given address in the heap after
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// checking that it is alive.
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auto Read(const Address& a, int line_num) -> const Value*;
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// Writes the given value at the address in the heap after
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// checking that the address is alive.
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auto Write(const Address& a, const Value* v, int line_num) -> void;
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// Put the given value on the heap and mark it as alive.
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auto AllocateValue(const Value* v) -> Address;
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// Marks the object at this address, and all of its sub-objects, as dead.
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auto Deallocate(const Address& address) -> void;
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// Print the value at the given address to the stream `out`.
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auto PrintAddress(const Address& a, std::ostream& out) -> void;
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// Print all the values on the heap to the stream `out`.
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auto PrintHeap(std::ostream& out) -> void;
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private:
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// Signal an error if the address is no longer alive.
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void CheckAlive(const Address& address, int line_num);
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std::vector<const Value*> values_;
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std::vector<bool> alive_;
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};
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} // namespace Carbon
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#endif // EXECUTABLE_SEMANTICS_INTERPRETER_MEMORY_H_
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