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faefe560ef
We can now get the binding data through the reference to the realm directly, so remove it from the context embedder data slot. PR-URL: https://github.com/nodejs/node/pull/48836 Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
#ifndef SRC_NODE_CONTEXT_DATA_H_
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#define SRC_NODE_CONTEXT_DATA_H_
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#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#include "util.h"
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#include "v8.h"
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namespace node {
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// Pick an index that's hopefully out of the way when we're embedded inside
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// another application. Performance-wise or memory-wise it doesn't matter:
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// Context::SetAlignedPointerInEmbedderData() is backed by a FixedArray,
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// worst case we pay a one-time penalty for resizing the array.
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#ifndef NODE_CONTEXT_EMBEDDER_DATA_INDEX
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#define NODE_CONTEXT_EMBEDDER_DATA_INDEX 32
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#endif
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#ifndef NODE_CONTEXT_SANDBOX_OBJECT_INDEX
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#define NODE_CONTEXT_SANDBOX_OBJECT_INDEX 33
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#endif
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#ifndef NODE_CONTEXT_ALLOW_WASM_CODE_GENERATION_INDEX
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#define NODE_CONTEXT_ALLOW_WASM_CODE_GENERATION_INDEX 34
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#endif
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#ifndef NODE_BINDING_DATA_STORE_INDEX
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#define NODE_BINDING_DATA_STORE_INDEX 35
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#endif
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#ifndef NODE_CONTEXT_ALLOW_CODE_GENERATION_FROM_STRINGS_INDEX
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#define NODE_CONTEXT_ALLOW_CODE_GENERATION_FROM_STRINGS_INDEX 36
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#endif
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#ifndef NODE_CONTEXT_CONTEXTIFY_CONTEXT_INDEX
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#define NODE_CONTEXT_CONTEXTIFY_CONTEXT_INDEX 37
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#endif
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#ifndef NODE_CONTEXT_REALM_INDEX
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#define NODE_CONTEXT_REALM_INDEX 38
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#endif
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// NODE_CONTEXT_TAG must be greater than any embedder indexes so that a single
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// check on the number of embedder data fields can assure the presence of all
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// embedder indexes.
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#ifndef NODE_CONTEXT_TAG
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#define NODE_CONTEXT_TAG 39
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#endif
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enum ContextEmbedderIndex {
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kEnvironment = NODE_CONTEXT_EMBEDDER_DATA_INDEX,
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kSandboxObject = NODE_CONTEXT_SANDBOX_OBJECT_INDEX,
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kAllowWasmCodeGeneration = NODE_CONTEXT_ALLOW_WASM_CODE_GENERATION_INDEX,
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kAllowCodeGenerationFromStrings =
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NODE_CONTEXT_ALLOW_CODE_GENERATION_FROM_STRINGS_INDEX,
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kContextifyContext = NODE_CONTEXT_CONTEXTIFY_CONTEXT_INDEX,
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kRealm = NODE_CONTEXT_REALM_INDEX,
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kContextTag = NODE_CONTEXT_TAG,
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};
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class ContextEmbedderTag {
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public:
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static inline void TagNodeContext(v8::Local<v8::Context> context) {
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// Used by ContextEmbedderTag::IsNodeContext to know that we are on a node
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// context.
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context->SetAlignedPointerInEmbedderData(
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ContextEmbedderIndex::kContextTag,
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ContextEmbedderTag::kNodeContextTagPtr);
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}
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static inline bool IsNodeContext(v8::Local<v8::Context> context) {
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if (UNLIKELY(context.IsEmpty())) {
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return false;
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}
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if (UNLIKELY(context->GetNumberOfEmbedderDataFields() <=
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ContextEmbedderIndex::kContextTag)) {
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return false;
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}
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if (UNLIKELY(context->GetAlignedPointerFromEmbedderData(
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ContextEmbedderIndex::kContextTag) !=
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ContextEmbedderTag::kNodeContextTagPtr)) {
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return false;
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}
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return true;
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}
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private:
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static void* const kNodeContextTagPtr;
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static int const kNodeContextTag;
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ContextEmbedderTag() = delete;
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};
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} // namespace node
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#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#endif // SRC_NODE_CONTEXT_DATA_H_
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