You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
2.5 KiB
79 lines
2.5 KiB
/*
|
|
* Copyright (C) 2015 The Android Open Source Project
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef ART_RUNTIME_GC_SCOPED_GC_CRITICAL_SECTION_H_
|
|
#define ART_RUNTIME_GC_SCOPED_GC_CRITICAL_SECTION_H_
|
|
|
|
#include "base/locks.h"
|
|
#include "collector_type.h"
|
|
#include "gc_cause.h"
|
|
|
|
namespace art {
|
|
|
|
class Thread;
|
|
|
|
namespace gc {
|
|
|
|
// The use of ScopedGCCriticalSection should be preferred whenever possible.
|
|
class GCCriticalSection {
|
|
public:
|
|
GCCriticalSection(Thread* self, const char* name)
|
|
: self_(self), section_name_(name) {}
|
|
~GCCriticalSection() {}
|
|
|
|
// Starts a GCCriticalSection. Returns the previous no-suspension reason.
|
|
const char* Enter(GcCause cause, CollectorType type) ACQUIRE(Roles::uninterruptible_);
|
|
|
|
// Ends a GCCriticalSection. Takes the old no-suspension reason.
|
|
void Exit(const char* old_reason) RELEASE(Roles::uninterruptible_);
|
|
|
|
private:
|
|
Thread* const self_;
|
|
const char* section_name_;
|
|
};
|
|
|
|
// Wait until the GC is finished and then prevent the GC from starting until the destructor. Used
|
|
// to prevent deadlocks in places where we call ClassLinker::VisitClass with all the threads
|
|
// suspended.
|
|
class ScopedGCCriticalSection {
|
|
public:
|
|
ScopedGCCriticalSection(Thread* self, GcCause cause, CollectorType collector_type)
|
|
ACQUIRE(Roles::uninterruptible_);
|
|
~ScopedGCCriticalSection() RELEASE(Roles::uninterruptible_);
|
|
|
|
private:
|
|
GCCriticalSection critical_section_;
|
|
const char* old_no_suspend_reason_;
|
|
};
|
|
|
|
// The use of ScopedGCCriticalSection should be preferred whenever possible.
|
|
// This class allows thread suspension but should never be used with allocations because of the
|
|
// deadlock risk. TODO: Add a new thread role for "no allocations" that still allows suspension.
|
|
class ScopedInterruptibleGCCriticalSection {
|
|
public:
|
|
ScopedInterruptibleGCCriticalSection(Thread* self, GcCause cause, CollectorType type);
|
|
~ScopedInterruptibleGCCriticalSection();
|
|
|
|
private:
|
|
Thread* const self_;
|
|
};
|
|
|
|
|
|
} // namespace gc
|
|
} // namespace art
|
|
|
|
#endif // ART_RUNTIME_GC_SCOPED_GC_CRITICAL_SECTION_H_
|