MethodTable* MethodTable::duplicate(STATE) {
size_t size, i;
MethodTable* dup = 0;
utilities::thread::SpinLock::LockGuard lg(lock_);
size = bins_->to_native();
dup = MethodTable::create(state, size);
// Allow for subclassing.
dup->klass(state, class_object(state));
size_t num = bins_->to_native();
for(i = 0; i < num; i++) {
MethodTableBucket* entry = try_as<MethodTableBucket>(values_->at(state, i));
while(entry) {
dup->store(state, entry->name(), entry->method_id(),
entry->method(), entry->scope(), entry->serial(), entry->visibility());
entry = try_as<MethodTableBucket>(entry->next());
}
}
return dup;
}
Object* MethodTable::alias(STATE, Symbol* name, Symbol* vis,
Symbol* orig_name, Object* orig_method,
Module* orig_mod)
{
check_frozen(state);
utilities::thread::SpinLock::LockGuard lg(lock_);
Executable* orig_exec;
if(Alias* alias = try_as<Alias>(orig_method)) {
orig_exec = alias->original_exec();
orig_mod = alias->original_module();
orig_name = alias->original_name();
} else if(orig_method->nil_p()) {
orig_exec = nil<Executable>();
} else {
orig_exec = as<Executable>(orig_method);
}
Alias* method = Alias::create(state, orig_name, orig_mod, orig_exec);
native_int num_entries = entries_->to_native();
native_int num_bins = bins_->to_native();
if(max_density_p(num_entries, num_bins)) {
redistribute(state, num_bins <<= 1);
}
native_int bin = find_bin(key_hash(name), num_bins);
MethodTableBucket* entry = try_as<MethodTableBucket>(values_->at(state, bin));
MethodTableBucket* last = NULL;
while(entry) {
if(entry->name() == name) {
entry->method_id(state, nil<String>());
entry->method(state, method);
entry->scope(state, cNil);
entry->serial(state, Fixnum::from(0));
entry->visibility(state, vis);
return name;
}
last = entry;
entry = try_as<MethodTableBucket>(entry->next());
}
if(last) {
last->next(state, MethodTableBucket::create(
state, name, nil<String>(), method, cNil, Fixnum::from(0), vis));
} else {
values_->put(state, bin, MethodTableBucket::create(
state, name, nil<String>(), method, cNil, Fixnum::from(0), vis));
}
entries(state, Fixnum::from(num_entries + 1));
return name;
}
Object* MethodTable::store(STATE, Symbol* name, Object* method_id,
Object* method, Object* scope, Fixnum* serial, Symbol* visibility)
{
check_frozen(state);
utilities::thread::SpinLock::LockGuard lg(lock_);
if(!method->nil_p()) {
if(Alias* stored_alias = try_as<Alias>(method)) {
lock_.unlock();
Object* res = alias(state, name, visibility,
stored_alias->original_name(),
stored_alias->original_exec(),
stored_alias->original_module());
lock_.lock();
return res;
}
}
native_int num_entries = entries_->to_native();
native_int num_bins = bins_->to_native();
if(max_density_p(num_entries, num_bins)) {
redistribute(state, num_bins <<= 1);
}
native_int bin = find_bin(key_hash(name), num_bins);
MethodTableBucket* entry = try_as<MethodTableBucket>(values_->at(state, bin));
MethodTableBucket* last = NULL;
while(entry) {
if(entry->name() == name) {
entry->method_id(state, method_id);
entry->method(state, method);
entry->scope(state, scope);
entry->serial(state, serial);
entry->visibility(state, visibility);
return name;
}
last = entry;
entry = try_as<MethodTableBucket>(entry->next());
}
if(last) {
last->next(state, MethodTableBucket::create(
state, name, method_id, method, scope, serial, visibility));
} else {
values_->put(state, bin, MethodTableBucket::create(
state, name, method_id, method, scope, serial, visibility));
}
entries(state, Fixnum::from(num_entries + 1));
return name;
}
MethodTableBucket* MethodTableBucket::create(STATE, Symbol* name, Object* method_id,
Object* method, Object* scope, Fixnum* serial, Symbol* vis)
{
MethodTableBucket *entry =
state->new_object<MethodTableBucket>(G(methtblbucket));
entry->name(state, name);
entry->method_id(state, method_id);
entry->method(state, method);
entry->scope(state, scope);
entry->serial(state, serial);
entry->visibility(state, vis);
return entry;
}