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/*
Copyright The containerd 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.
*/
package schedcore
import (
"golang.org/x/sys/unix"
)
// PidType is the type of provided pid value and how it should be treated
type PidType int
const (
// Pid affects the current pid
Pid PidType = pidtypePid
// ThreadGroup affects all threads in the group
ThreadGroup PidType = pidtypeTgid
// ProcessGroup affects all processes in the group
ProcessGroup PidType = pidtypePgid
)
const (
pidtypePid = 0
pidtypeTgid = 1
pidtypePgid = 2
)
// Create a new sched core domain
func Create(t PidType) error {
return unix.Prctl(unix.PR_SCHED_CORE, unix.PR_SCHED_CORE_CREATE, 0, uintptr(t), 0)
}
// ShareFrom shares the sched core domain from the provided pid
func ShareFrom(pid uint64, t PidType) error {
return unix.Prctl(unix.PR_SCHED_CORE, unix.PR_SCHED_CORE_SHARE_FROM, uintptr(pid), uintptr(t), 0)
}
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