Hi,
I am new to V8 and trying to create some bindings between my C++ and JS
code. The issue is that I am not able to access a global Javascript
variable across different Javascript functions. The reason is because each
Javascript function is called my different C++ function. I guess the
problem with my code is that I am creating a new local context within each
C++ function.
*My JS Code:*
var test = [];
function f1()
{
var obj = {};
obj.name = "Testing";
test.push(obj);
}
function f2()
{
var value = test[0].name;
}
*My C++ code:*
class Test {
v8::Persistent<v8::Script> compiledScript;
v8::Local<v8::Value> result;
v8::Isolate* isolate;
v8::Persistent<v8::Context> context;
Test(filePath) {
// Create and allocate isolate
v8::Locker isolateLocker(isolate);
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
// Create some bindings
v8::Local<v8::Context> con = v8::Context::New(isolate,
nullptr, binding_template);
con->SetAlignedPointerInEmbedderData(0, &binder);
context.Reset(isolate, con);
v8::Context::Scope context_scope(con);
std::string source_file = LoadFile(filePath);
v8::Local<v8::String> sourceScript =
v8::String::NewFromUtf8(isolate, source_file.c_str(),
v8::NewStringType::kNormal).ToLocalChecked();
v8::Local<v8::Script> script = v8::Script::Compile(con,
sourceScript).ToLocalChecked();
compiledScript.Reset(isolate, script);
}
void function1()
{
v8::Locker isolateLocker(isolate);
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> con=
v8::Local<v8::Context>::New(isolate, context);
v8::Local<v8::Script> script =
v8::Local<v8::Script>::New(isolate, compiledScript);
v8::Context::Scope context_scope(con);
// Code to call the Javascript function f1
}
void function2()
{
v8::Locker isolateLocker(isolate);
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> con =
v8::Local<v8::Context>::New(isolate, context);
v8::Local<v8::Script> script =
v8::Local<v8::Script>::New(isolate, compiledScript);
v8::Context::Scope context_scope(con);
// Code to call the Javascript function f2
}
When the above JS code compiles, I get an error that says name is a
property of undefined. My understanding is that variable test is not
recognized in second function probably because they are executing in
different contexts. Can someone please help me understand and fix the issue?
Any help will be greatly appreciated :)
Thanks,
Kavin
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