define callback scope (nodejs/node-addon-api#1283)

Author: toyobayashi

packages/emnapi/include/napi-inl.h

@@ -4651,7 +4651,7 @@ inline Value EscapableHandleScope::Escape(napi_value escapee) {
   return Value(_env, result);
 }
 
-#if (NAPI_VERSION > 2 && !defined(__wasm__))
+#if (NAPI_VERSION > 2)
 ////////////////////////////////////////////////////////////////////////////////
 // CallbackScope class
 ////////////////////////////////////////////////////////////////////////////////

packages/emnapi/include/napi.h

@@ -2405,7 +2405,7 @@ class EscapableHandleScope {
   napi_escapable_handle_scope _scope;
 };
 
-#if (NAPI_VERSION > 2 && !defined(__wasm__))
+#if (NAPI_VERSION > 2)
 class CallbackScope {
  public:
   CallbackScope(napi_env env, napi_callback_scope scope);

packages/emnapi/include/node_api.h

@@ -150,6 +150,15 @@ napi_add_env_cleanup_hook(napi_env env, napi_cleanup_hook fun, void* arg);
 NAPI_EXTERN napi_status
 napi_remove_env_cleanup_hook(napi_env env, napi_cleanup_hook fun, void* arg);
 
+NAPI_EXTERN napi_status
+napi_open_callback_scope(napi_env env,
+                         napi_value resource_object,
+                         napi_async_context context,
+                         napi_callback_scope* result);
+
+NAPI_EXTERN napi_status
+napi_close_callback_scope(napi_env env, napi_callback_scope scope);
+
 #endif  // NAPI_VERSION >= 3
 
 #if NAPI_VERSION >= 4

packages/emnapi/include/node_api_types.h

@@ -3,6 +3,7 @@
 
 #include "js_native_api_types.h"
 
+typedef struct napi_callback_scope__* napi_callback_scope;
 typedef struct napi_async_context__* napi_async_context;
 typedef struct napi_async_work__* napi_async_work;
 

packages/emnapi/src/node.ts

@@ -125,6 +125,16 @@ function __emnapi_async_destroy_js (async_context: Pointer<int64_t>): napi_statu
   return napi_status.napi_ok
 }
 
+// https://github.com/nodejs/node-addon-api/pull/1283
+
+function napi_open_callback_scope (env: napi_env, ignored: napi_value, async_context_handle: number, result: number): napi_status {
+  throw new Error('napi_open_callback_scope has not been implemented yet')
+}
+
+function napi_close_callback_scope (env: napi_env, scope: number): napi_status {
+  throw new Error('napi_close_callback_scope has not been implemented yet')
+}
+
 // @ts-expect-error
 function napi_make_callback (env: napi_env, async_context: Pointer<int64_t>, recv: napi_value, func: napi_value, argc: size_t, argv: Pointer<napi_value>, result: Pointer<napi_value>): napi_status {
   let i = 0
@@ -186,4 +196,6 @@ emnapiImplementInternal('_emnapi_node_make_callback', 'ipppppddp', __emnapi_node
 emnapiImplementInternal('_emnapi_async_init_js', 'ippp', __emnapi_async_init_js)
 emnapiImplementInternal('_emnapi_async_destroy_js', 'ip', __emnapi_async_destroy_js)
 
+emnapiImplement('napi_open_callback_scope', 'ipppp', napi_open_callback_scope)
+emnapiImplement('napi_close_callback_scope', 'ipp', napi_close_callback_scope)
 emnapiImplement('napi_make_callback', 'ippppppp', napi_make_callback)