Adding upstream version 2.52.6.

Signed-off-by: Daniel Baumann <daniel@debian.org>

middleware/session/data.go

@@ -0,0 +1,63 @@
+package session
+
+import (
+	"sync"
+)
+
+// go:generate msgp
+// msgp -file="data.go" -o="data_msgp.go" -tests=false -unexported
+type data struct {
+	sync.RWMutex
+	Data map[string]interface{}
+}
+
+var dataPool = sync.Pool{
+	New: func() interface{} {
+		d := new(data)
+		d.Data = make(map[string]interface{})
+		return d
+	},
+}
+
+func acquireData() *data {
+	return dataPool.Get().(*data) //nolint:forcetypeassert // We store nothing else in the pool
+}
+
+func (d *data) Reset() {
+	d.Lock()
+	d.Data = make(map[string]interface{})
+	d.Unlock()
+}
+
+func (d *data) Get(key string) interface{} {
+	d.RLock()
+	v := d.Data[key]
+	d.RUnlock()
+	return v
+}
+
+func (d *data) Set(key string, value interface{}) {
+	d.Lock()
+	d.Data[key] = value
+	d.Unlock()
+}
+
+func (d *data) Delete(key string) {
+	d.Lock()
+	delete(d.Data, key)
+	d.Unlock()
+}
+
+func (d *data) Keys() []string {
+	d.Lock()
+	keys := make([]string, 0, len(d.Data))
+	for k := range d.Data {
+		keys = append(keys, k)
+	}
+	d.Unlock()
+	return keys
+}
+
+func (d *data) Len() int {
+	return len(d.Data)
+}