src: make IsolateData store ArrayBufferAllocator

This enables us to identify whether we are using an
allocator that we know more about than what the generic
`ArrayBuffer::Allocator` API provides, in particular
whether it is `malloc()`-compatible.

PR-URL: https://github.com/nodejs/node/pull/26207
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

1 files changed, 10 insertions, 4 deletions

diff --git a/src/env.h b/src/env.h
index 5f578dd54a..527a28f695 100644
--- a/src/env.h
+++ b/src/env.h
@@ -394,16 +394,20 @@ class Environment;
 
 class IsolateData {
  public:
-  IsolateData(v8::Isolate* isolate, uv_loop_t* event_loop,
+  IsolateData(v8::Isolate* isolate,
+              uv_loop_t* event_loop,
               MultiIsolatePlatform* platform = nullptr,
-              uint32_t* zero_fill_field = nullptr);
+              ArrayBufferAllocator* node_allocator = nullptr);
   ~IsolateData();
   inline uv_loop_t* event_loop() const;
-  inline uint32_t* zero_fill_field() const;
   inline MultiIsolatePlatform* platform() const;
   inline std::shared_ptr<PerIsolateOptions> options();
   inline void set_options(std::shared_ptr<PerIsolateOptions> options);
 
+  inline bool uses_node_allocator() const;
+  inline v8::ArrayBuffer::Allocator* allocator() const;
+  inline ArrayBufferAllocator* node_allocator() const;
+
 #define VP(PropertyName, StringValue) V(v8::Private, PropertyName)
 #define VY(PropertyName, StringValue) V(v8::Symbol, PropertyName)
 #define VS(PropertyName, StringValue) V(v8::String, PropertyName)
@@ -436,7 +440,9 @@ class IsolateData {
 
   v8::Isolate* const isolate_;
   uv_loop_t* const event_loop_;
-  uint32_t* const zero_fill_field_;
+  v8::ArrayBuffer::Allocator* const allocator_;
+  ArrayBufferAllocator* const node_allocator_;
+  const bool uses_node_allocator_;
   MultiIsolatePlatform* platform_;
   std::shared_ptr<PerIsolateOptions> options_;