629db0a6cd
This will make accidental includes much easier to see and fix. Without this, you might get compiler or linker errors instead. R=jkummerow@chromium.org Bug: v8:11238 Cq-Include-Trybots: luci.v8.try:v8_linux64_no_wasm_compile_rel Change-Id: I235d779f9c1ed3af5d736f1554ded427935ddc9b Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2756531 Commit-Queue: Clemens Backes <clemensb@chromium.org> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org> Cr-Commit-Position: refs/heads/master@{#73422}
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#if !V8_ENABLE_WEBASSEMBLY
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#error This header should only be included if WebAssembly is enabled.
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#endif // !V8_ENABLE_WEBASSEMBLY
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#ifndef V8_WASM_SIGNATURE_MAP_H_
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#define V8_WASM_SIGNATURE_MAP_H_
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#include <unordered_map>
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#include "src/codegen/signature.h"
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#include "src/wasm/value-type.h"
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namespace v8 {
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namespace internal {
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namespace wasm {
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// A signature map canonicalizes signatures into a range of indices so that
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// two different {FunctionSig} instances with the same contents map to the
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// same index.
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class V8_EXPORT_PRIVATE SignatureMap {
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public:
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// Allow default construction and move construction (because we have vectors
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// of objects containing SignatureMaps), but disallow copy or assign. It's
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// too easy to get security bugs by accidentally updating a copy of the map.
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MOVE_ONLY_WITH_DEFAULT_CONSTRUCTORS(SignatureMap);
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// Gets the index for a signature, assigning a new index if necessary.
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uint32_t FindOrInsert(const FunctionSig& sig);
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// Gets the index for a signature, returning {-1} if not found.
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int32_t Find(const FunctionSig& sig) const;
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// Disallows further insertions to this signature map.
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void Freeze() { frozen_ = true; }
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size_t size() const { return map_.size(); }
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bool is_frozen() const { return frozen_; }
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private:
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bool frozen_ = false;
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std::unordered_map<FunctionSig, uint32_t, base::hash<FunctionSig>> map_;
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};
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} // namespace wasm
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} // namespace internal
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} // namespace v8
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#endif // V8_WASM_SIGNATURE_MAP_H_
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