initial commit

store.go

@@ -0,0 +1,36 @@
+package netalloc
+
+import (
+	"sync"
+)
+
+type Store interface {
+	sync.Locker
+	Exists(key string) (bool, error)
+	Add(key string) error
+	Delete(key string) error
+}
+
+type MemStore struct {
+	sync.Mutex
+	m map[string]struct{}
+}
+
+func NewMemStore() Store {
+	return &MemStore{m: make(map[string]struct{})}
+}
+
+func (m *MemStore) Exists(key string) (bool, error) {
+	_, ok := m.m[key]
+	return ok, nil
+}
+
+func (m *MemStore) Add(key string) error {
+	m.m[key] = struct{}{}
+	return nil
+}
+
+func (m *MemStore) Delete(key string) error {
+	delete(m.m, key)
+	return nil
+}