inline bool set_local_depth(STATE, CallFrame* call_frame, intptr_t depth, intptr_t index) {
if(depth == 0) {
Exception::internal_error(state, "illegal set_local_depth usage");
return false;
} else {
VariableScope* scope = call_frame->scope->parent();
if(!scope || scope->nil_p()) {
Exception::internal_error(state, "illegal set_local_depth usage, no parent");
return false;
}
for(int j = 1; j < depth; j++) {
scope = scope->parent();
if(!scope || scope->nil_p()) {
Exception::internal_error(state, "illegal set_local_depth usage, no parent");
return false;
}
}
if(index >= scope->number_of_locals()) {
Exception::internal_error(state, "illegal set_local_depth usage, bad index");
return false;
}
Object* val = stack_pop();
scope->set_local(state, index, val);
stack_push(val);
return true;
}
}
void VariableScope::Info::mark(Object* obj, ObjectMark& mark) {
auto_mark(obj, mark);
VariableScope* vs = as<VariableScope>(obj);
vs->fixup();
Object* tmp;
size_t locals = vs->number_of_locals();
for(size_t i = 0; i < locals; i++) {
tmp = mark.call(vs->get_local(i));
if(tmp) vs->set_local(mark.state(), i, tmp);
}
}
VariableScope* StackVariables::create_heap_alias(STATE, CallFrame* call_frame,
bool full)
{
if(on_heap_) return on_heap_;
MachineCode* mcode = call_frame->compiled_code->machine_code();
VariableScope* scope =
state->memory()->new_object<VariableScope>(state, G(variable_scope));
if(parent_) {
scope->parent(state, parent_);
} else {
scope->parent(state, nil<VariableScope>());
}
scope->self(state, self_);
scope->block(state, block_);
scope->module(state, module_);
scope->method(state, call_frame->compiled_code);
scope->heap_locals(state, nil<Tuple>());
scope->last_match(state, last_match_);
scope->fiber(state, state->vm()->thread()->current_fiber());
scope->number_of_locals(mcode->number_of_locals);
scope->isolated(0);
scope->flags(call_frame->flags);
scope->_lock_.init();
if(!full) {
scope->isolated(1);
scope->heap_locals(state, Tuple::create(state, mcode->number_of_locals));
for(int i = 0; i < scope->number_of_locals(); i++) {
scope->set_local(state, i, locals_[i]);
}
}
scope->locals(locals_);
scope->dynamic_locals(state, nil<LookupTable>());
on_heap_ = scope;
return scope;
}
VariableScope* VariableScope::promote(STATE) {
VariableScope* scope = state->new_struct<VariableScope>(
G(variable_scope), number_of_locals_ * sizeof(Object*));
scope->block(state, block_);
scope->method(state, method_);
scope->module(state, module_);
if(parent_) {
scope->parent(state, parent_);
} else {
scope->parent(state, (VariableScope*)Qnil);
}
scope->self(state, self_);
scope->number_of_locals_ = number_of_locals_;
for(int i = 0; i < number_of_locals_; i++) {
scope->set_local(state, i, locals_[i]);
}
return scope;
}