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// Copyright 2021 The gVisor 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.
//go:build go1.1
// +build go1.1
package kernel
// pidNamespaceData may contain extra per-PID-namespace data.
// +stateify savable
type pidNamespaceData struct {
}
// newPIDNamespaceData returns a new `pidNamespaceData` struct.
func newPIDNamespaceData() pidNamespaceData {
return pidNamespaceData{}
}
// addTask adds a Task into this PIDNamespace.
// It is always performed under TaskSet lock.
func (ns *PIDNamespace) addTask(t *Task, tid ThreadID) error {
ns.tasks[tid] = t
ns.tids[t] = tid
if t.tg.leader == nil {
// New thread group.
ns.tgids[t.tg] = tid
}
return nil
}
// deleteTask deletes a Task from this PIDNamespace.
// It is always performed under TaskSet lock.
func (ns *PIDNamespace) deleteTask(t *Task) {
delete(ns.tasks, ns.tids[t])
delete(ns.tids, t)
if t == t.tg.leader || t.tg.leader == nil {
delete(ns.tgids, t.tg)
}
}
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