On Wed, Sep 25, 2013 at 10:27 AM, Ashish Negi
<[email protected]> wrote:
> Yaa that is working and i am able to execute simple js code => This
> definately implies that i am getting into v8 or node main thread. But i am
> not being able to execute node specific code like
>
> var fs = require('fs');
>
> I guess since I am creating a new persistent context for myself, it would be
> independent of node's context.
> like:
>
> v8::HandleScope handleScope;
> v8::Persistent<v8::Context> context = CreateShellContext();
> context->Enter();
> // unique_ptr makes sure that data would be deleted even if there is an
> exception.
> std::unique_ptr<char[]> codeData((char*)handle->data);
> RunCode(context, (char*)handle->data);
> context->Exit();
> context.Dispose();
>
> How can i get the context of node or is there some method to execute the
> code in node's context.
You can get the current context with v8::Context::GetCurrent(). Enter
it, then call node::MakeCallback(). That function requires a `this`
object and a function but you can always create an anonymous function
with v8::Script::New(), then call it with v8::Context::Global() as the
`this` object. Brief example:
Local<Context> context = Context::GetCurrent();
Context::Scope context_scope(context);
const char source[] = "(function(x) { return x * x; })";
Local<String> script_source = String::New(source, sizeof(source) - 1);
Local<Script> script = Script::New(script_source);
Local<Value> value = script->Run();
assert(value.IsEmpty() == false);
assert(value->IsFunction() == true);
Local<Function> fn = value.As<Function>();
Local<Value> arg = Integer::New(42);
Local<Value> rc = MakeCallback(context->Global(), fn, 1, &arg);
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