| // Copyright Istio Authors |
| // |
| // 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 reserveport |
| |
| import ( |
| multierror "github.com/hashicorp/go-multierror" |
| ) |
| |
| func allocatePool(size int) (pool []ReservedPort, err error) { |
| tempPool := make([]ReservedPort, size) |
| defer func() { |
| if err != nil { |
| _ = freePool(tempPool) |
| } |
| }() |
| |
| for i := 0; i < size; i++ { |
| var err error |
| tempPool[i], err = newReservedPort() |
| if err != nil { |
| return nil, err |
| } |
| } |
| return tempPool, nil |
| } |
| |
| func freePool(pool []ReservedPort) (err error) { |
| // Close any ports still in the pool. |
| for i := 0; i < len(pool); i++ { |
| p := pool[i] |
| if p == nil { |
| continue |
| } |
| |
| if e := p.Close(); e != nil { |
| err = multierror.Append(err, e) |
| } |
| } |
| return err |
| } |