1 // Copyright 2016 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #include "VmLock.h"
16 
17 namespace android {
18 
19 static VmLock* sInstance = nullptr;
20 
21 VmLock::~VmLock() = default;
22 
get()23 VmLock* VmLock::get() {
24     if (!sInstance) {
25         sInstance = new VmLock();
26     }
27     return sInstance;
28 }
29 
hasInstance()30 bool VmLock::hasInstance() {
31     return sInstance != nullptr;
32 }
33 
set(VmLock * vmLock)34 VmLock* VmLock::set(VmLock* vmLock) {
35     VmLock* result = sInstance;
36     sInstance = vmLock;
37     return result;
38 }
39 
40 }  // namespace android
41 
42