net.sandius.rembulan.runtime.ResumeInfo Maven / Gradle / Ivy
/*
* Copyright 2016 Miroslav Janíček
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sandius.rembulan.runtime;
import net.sandius.rembulan.Conversions;
import net.sandius.rembulan.util.Check;
class ResumeInfo {
public final Resumable resumable;
public final Object savedState;
public ResumeInfo(Resumable resumable, Object savedState) {
this.resumable = Check.notNull(resumable);
this.savedState = savedState;
}
public boolean resume(ExecutionContext context, Throwable error) throws ResolvedControlThrowable {
if (error == null) {
// no errors
resumable.resume(context, savedState);
Dispatch.evaluateTailCalls(context);
return true;
}
else {
// there is an error to be handled
if (resumable instanceof ProtectedResumable) {
// top is protected, can handle the error
ProtectedResumable pr = (ProtectedResumable) resumable;
pr.resumeError(context, savedState, Conversions.toErrorObject(error));
Dispatch.evaluateTailCalls(context);
return true;
}
else {
// top is not protected, continue unwinding the stack
return false;
}
}
}
}