Ok, so I have the following code.
The function "Delete" is a function property of the Point object, to ensure
proper destruction of the c++ object.
At point (2) i am checking whether the js variable is a global variable and
set the value to Null().
Is there a way to set a local function scope js variable declared with
"var" keyword to null through the c++ code ?
//---------------------------------------------------------------
#define UNWRAP_INTERNAL_FIELD(holder, retval, pointer)
\
HandleScope handle_scope;
\
Local<Object> self = holder;
\
if (self->InternalFieldCount() != 1 ||
self->GetInternalField(0)->IsNull() == true ||
self->GetInternalField(0)->IsUndefined() == true) \
return retval;
\
Local<External> wrap = Local<External>::Cast(self->GetInternalField(0));
\
Point* pointer = static_cast<Point*>(wrap->Value());
//---------------------------------------------------------------
static Handle<Value> Delete(const Arguments &args) {
UNWRAP_INTERNAL_FIELD(args.Holder(), Null(), p);
// (1) Clear args[0] object properties and functions
Local<Array> array = self->GetPropertyNames();
for (int i = 0; (uint32_t)i < array->Length(); i++)
self->ForceDelete(array->Get(i));
// (2) If args[0] is a global object then remove the object form
global scope
Local<Object> global = self->CreationContext()->Global();
array = global->GetPropertyNames();
for (int i = array->Length()-1; i >= 0; i--)
{
HandleScope handle_scope;
Local<Value> name = array->Get(i);
Local<Object> obj = global->Get(name)->ToObject();
if (obj->InternalFieldCount() == 1 &&
obj->GetInternalField(0)->IsNull() == false)
{
Local<External> _wrap =
Local<External>::Cast(obj->GetInternalField(0));
if (wrap->Value() == _wrap->Value()) {
global->Set(name, Null());
}
}
}
// (3) Delete the c++ object and call its destructors
delete p;
// (4) SetInternalField to null
self->SetInternalField(0, Null());
return Boolean::New(true);
}
--
v8-users mailing list
v8-users@googlegroups.com
http://groups.google.com/group/v8-users
