1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ART_RUNTIME_GC_SCOPED_GC_CRITICAL_SECTION_H_
18#define ART_RUNTIME_GC_SCOPED_GC_CRITICAL_SECTION_H_
19
20#include "base/mutex.h"
21#include "collector_type.h"
22#include "gc_cause.h"
23
24namespace art {
25
26class Thread;
27
28namespace gc {
29
30// Wait until the GC is finished and then prevent GC from starting until the destructor. Used
31// to prevent deadlocks in places where we call ClassLinker::VisitClass with all th threads
32// suspended.
33class ScopedGCCriticalSection {
34 public:
35  ScopedGCCriticalSection(Thread* self, GcCause cause, CollectorType collector_type)
36      ACQUIRE(Roles::uninterruptible_);
37  ~ScopedGCCriticalSection() RELEASE(Roles::uninterruptible_);
38
39 private:
40  Thread* const self_;
41  const char* old_cause_;
42};
43
44}  // namespace gc
45}  // namespace art
46
47#endif  // ART_RUNTIME_GC_SCOPED_GC_CRITICAL_SECTION_H_
48