/
string.go
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/
string.go
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// Copyright 2019 Authors of Cilium
//
// 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 counter
// StringCounter tracks references for strings.
//
// No threadsafety is provided within this structure, the user is expected to
// handle concurrent access to this structure if it is used from multiple
// threads.
type StringCounter map[string]int
// Add increments the reference count for the specified string key.
func (s StringCounter) Add(key string) (changed bool) {
value, exists := s[key]
if !exists {
changed = true
}
s[key] = value + 1
return changed
}
// Delete decrements the reference count for the specified string key.
func (s StringCounter) Delete(key string) bool {
value := s[key]
if value <= 1 {
delete(s, key)
return true
}
s[key] = value - 1
return false
}