/* ================================================================================== Copyright (c) 2019 AT&T Intellectual Property. Copyright (c) 2019 Nokia 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 control import "gerrit.o-ran-sc.org/r/ric-plt/xapp-frame/pkg/xapp" type Registry struct { register map[uint16]bool counter uint16 } // This method should run as a constructor func (r *Registry) Initialize(seedsn uint16) { r.register = make(map[uint16]bool) r.counter = seedsn } // Reserves and returns the next free sequence number func (r *Registry) ReserveSequenceNumber() uint16 { if r.IsValidSequenceNumber(r.counter){ } sequenceNumber := r.counter r.register[sequenceNumber] = false r.shift() return sequenceNumber } // This function checks the validity of the given subscription id func (r *Registry) IsValidSequenceNumber(sn uint16) bool { xapp.Logger.Debug("Registry map: %v", r.register) if _, ok := r.register[sn]; ok { return true } return false } // This function sets the give id as confirmed in the register func (r *Registry) setSubscriptionToConfirmed(sn uint16) { r.register[sn] = true } func (r *Registry) shift() { if r.counter == 65535 { r.counter = 0 } else { r.counter++ } } //This function sets the given id as unused in the register func (r *Registry) deleteSubscription(sn uint16) { r.register[sn] = false } //This function releases the given id as unused in the register func (r *Registry) releaseSequenceNumber(sn uint16) bool { if r.register[sn] { return false } else { delete(r.register, sn) return true } }