blob: b6c31ce10a05222b858513cc1b30e7608b18406c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// Copyright 2018 Google Inc.
//
// 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 kvm
import (
"sync/atomic"
"unsafe"
)
// dirtySet tracks vCPUs for invalidation.
type dirtySet struct {
vCPUs []unsafe.Pointer
}
// makeDirtySet makes a new dirtySet.
func makeDirtySet(size int) dirtySet {
return dirtySet{
vCPUs: make([]unsafe.Pointer, size),
}
}
// size is the size of the set.
func (ds *dirtySet) size() int {
return len(ds.vCPUs)
}
// swap sets the given index and returns the previous value.
//
// The index is typically the id for a non-nil vCPU.
func (ds *dirtySet) swap(index int, c *vCPU) *vCPU {
return (*vCPU)(atomic.SwapPointer(&ds.vCPUs[index], unsafe.Pointer(c)))
}
|
