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#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_LIST |
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#define NODE_BINDING_LIST_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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// 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 37 |
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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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kBindingListIndex = NODE_BINDING_LIST_INDEX, |
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kAllowCodeGenerationFromStrings = |
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NODE_CONTEXT_ALLOW_CODE_GENERATION_FROM_STRINGS_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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6751 |
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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✓✓ |
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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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✓✓ |
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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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✗✓ |
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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_ |