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Is it possible to determine the type of an NAPI::Object in a non-global context? #764
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Object.InstanceOf ends up calling napi_status napi_instanceof(napi_env env,
napi_value object,
napi_value constructor,
bool* result) {
NAPI_PREAMBLE(env);
CHECK_ARG(env, object);
CHECK_ARG(env, result);
*result = false;
v8::Local<v8::Object> ctor;
v8::Local<v8::Context> context = env->context();
CHECK_TO_OBJECT(env, context, ctor, constructor);
if (!ctor->IsFunction()) {
napi_throw_type_error(env,
"ERR_NAPI_CONS_FUNCTION",
"Constructor must be a function");
return napi_set_last_error(env, napi_function_expected);
}
napi_status status = napi_generic_failure;
v8::Local<v8::Value> val = v8impl::V8LocalValueFromJsValue(object);
auto maybe_result = val->InstanceOf(context, ctor);
CHECK_MAYBE_NOTHING(env, maybe_result, status);
*result = maybe_result.FromJust();
return GET_RETURN_STATUS(env);
} I assume the problem is that mismatch between the context that was active when the env was created and the context active when the call is made. @gabrielschulhof, @addaleax some methods call I'm wondering if for napi_instanceof we should be using |
Yes. The
Currently, this is irrelevant because Node.js is not actually supporting multi-Context addons. Once we do, using (For the most part, passing a context to V8 functions is relevant for cases in which a new Error object is being thrown – e.g. because the right-hand side isn’t a constructor.)
|
Thanks for the clarification on contexts. Would you agree that the 2 places we |
I think that would be fine, yes. |
In summary, it sounds like proper support for native add-ons to correctly support |
@jschlight I think this has been answered, is it ok to close ? |
Refs: nodejs/node-addon-api#764 Improve the consistency of how we get a context when needed. We generally used env->context() in N-API but there were are few exceptions that this PR addresses. Signed-off-by: Michael Dawson <[email protected]>
Refs: nodejs/node-addon-api#764 Improve the consistency of how we get a context when needed. We generally used env->context() in N-API but there were are few exceptions that this PR addresses. Signed-off-by: Michael Dawson <[email protected]> PR-URL: #36068 Reviewed-By: Juan José Arboleda <[email protected]> Reviewed-By: Gabriel Schulhof <[email protected]> Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]>
Refs: nodejs/node-addon-api#764 Improve the consistency of how we get a context when needed. We generally used env->context() in N-API but there were are few exceptions that this PR addresses. Signed-off-by: Michael Dawson <[email protected]> PR-URL: #36068 Reviewed-By: Juan José Arboleda <[email protected]> Reviewed-By: Gabriel Schulhof <[email protected]> Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]>
Yes @mhdawson Thanks for the ping. |
Refs: nodejs/node-addon-api#764 Improve the consistency of how we get a context when needed. We generally used env->context() in N-API but there were are few exceptions that this PR addresses. Signed-off-by: Michael Dawson <[email protected]> PR-URL: #36068 Reviewed-By: Juan José Arboleda <[email protected]> Reviewed-By: Gabriel Schulhof <[email protected]> Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]>
Refs: nodejs/node-addon-api#764 Improve the consistency of how we get a context when needed. We generally used env->context() in N-API but there were are few exceptions that this PR addresses. Signed-off-by: Michael Dawson <[email protected]> PR-URL: #36068 Reviewed-By: Juan José Arboleda <[email protected]> Reviewed-By: Gabriel Schulhof <[email protected]> Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]>
Refs: nodejs/node-addon-api#764 Improve the consistency of how we get a context when needed. We generally used env->context() in N-API but there were are few exceptions that this PR addresses. Signed-off-by: Michael Dawson <[email protected]> PR-URL: #36068 Reviewed-By: Juan José Arboleda <[email protected]> Reviewed-By: Gabriel Schulhof <[email protected]> Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]>
This question is related to an interesting issue raised on the
node-sqlite3
project:TryGhost/node-sqlite3#1355
The JavaScript code from the issue looks like:
The pertinent code using
node-addon-api
looks like:The code to determine if
source
is aDate
object is failing apparently becausesource
has been allocated outside the global context.The author of the
node-sqlite3
issue has identified theIsDate
method as a way to address this issue. But is there another more general approach that would work to identify type of an NAPI::Object in a non-global context?The text was updated successfully, but these errors were encountered: