| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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. |
| |
| #include "util/cyclic-barrier.h" |
| |
| #include "common/names.h" |
| |
| namespace impala { |
| |
| CyclicBarrier::CyclicBarrier(int num_threads) : num_threads_(num_threads) {} |
| |
| void CyclicBarrier::Cancel(const Status& err) { |
| DCHECK(!err.ok()); |
| { |
| lock_guard<mutex> l(lock_); |
| if (!cancel_status_.ok()) return; // Already cancelled. |
| cancel_status_ = err; |
| } |
| barrier_cv_.NotifyAll(); |
| } |
| } // namespace impala |