1*795d594fSAndroid Build Coastguard Worker /* 2*795d594fSAndroid Build Coastguard Worker * Copyright (C) 2015 The Android Open Source Project 3*795d594fSAndroid Build Coastguard Worker * 4*795d594fSAndroid Build Coastguard Worker * Licensed under the Apache License, Version 2.0 (the "License"); 5*795d594fSAndroid Build Coastguard Worker * you may not use this file except in compliance with the License. 6*795d594fSAndroid Build Coastguard Worker * You may obtain a copy of the License at 7*795d594fSAndroid Build Coastguard Worker * 8*795d594fSAndroid Build Coastguard Worker * http://www.apache.org/licenses/LICENSE-2.0 9*795d594fSAndroid Build Coastguard Worker * 10*795d594fSAndroid Build Coastguard Worker * Unless required by applicable law or agreed to in writing, software 11*795d594fSAndroid Build Coastguard Worker * distributed under the License is distributed on an "AS IS" BASIS, 12*795d594fSAndroid Build Coastguard Worker * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13*795d594fSAndroid Build Coastguard Worker * See the License for the specific language governing permissions and 14*795d594fSAndroid Build Coastguard Worker * limitations under the License. 15*795d594fSAndroid Build Coastguard Worker */ 16*795d594fSAndroid Build Coastguard Worker 17*795d594fSAndroid Build Coastguard Worker #ifndef ART_RUNTIME_GC_SCOPED_GC_CRITICAL_SECTION_H_ 18*795d594fSAndroid Build Coastguard Worker #define ART_RUNTIME_GC_SCOPED_GC_CRITICAL_SECTION_H_ 19*795d594fSAndroid Build Coastguard Worker 20*795d594fSAndroid Build Coastguard Worker #include "base/locks.h" 21*795d594fSAndroid Build Coastguard Worker #include "base/macros.h" 22*795d594fSAndroid Build Coastguard Worker #include "collector_type.h" 23*795d594fSAndroid Build Coastguard Worker #include "gc_cause.h" 24*795d594fSAndroid Build Coastguard Worker 25*795d594fSAndroid Build Coastguard Worker namespace art HIDDEN { 26*795d594fSAndroid Build Coastguard Worker 27*795d594fSAndroid Build Coastguard Worker class Thread; 28*795d594fSAndroid Build Coastguard Worker 29*795d594fSAndroid Build Coastguard Worker namespace gc { 30*795d594fSAndroid Build Coastguard Worker 31*795d594fSAndroid Build Coastguard Worker // The use of ScopedGCCriticalSection should be preferred whenever possible. 32*795d594fSAndroid Build Coastguard Worker class GCCriticalSection { 33*795d594fSAndroid Build Coastguard Worker public: GCCriticalSection(Thread * self,const char * name)34*795d594fSAndroid Build Coastguard Worker GCCriticalSection(Thread* self, const char* name) 35*795d594fSAndroid Build Coastguard Worker : self_(self), section_name_(name) {} ~GCCriticalSection()36*795d594fSAndroid Build Coastguard Worker ~GCCriticalSection() {} 37*795d594fSAndroid Build Coastguard Worker 38*795d594fSAndroid Build Coastguard Worker // Starts a GCCriticalSection. Returns the previous no-suspension reason. 39*795d594fSAndroid Build Coastguard Worker EXPORT const char* Enter(GcCause cause, CollectorType type) ACQUIRE(Roles::uninterruptible_); 40*795d594fSAndroid Build Coastguard Worker 41*795d594fSAndroid Build Coastguard Worker // Ends a GCCriticalSection. Takes the old no-suspension reason. 42*795d594fSAndroid Build Coastguard Worker EXPORT void Exit(const char* old_reason) RELEASE(Roles::uninterruptible_); 43*795d594fSAndroid Build Coastguard Worker 44*795d594fSAndroid Build Coastguard Worker private: 45*795d594fSAndroid Build Coastguard Worker Thread* const self_; 46*795d594fSAndroid Build Coastguard Worker const char* section_name_; 47*795d594fSAndroid Build Coastguard Worker }; 48*795d594fSAndroid Build Coastguard Worker 49*795d594fSAndroid Build Coastguard Worker // Wait until the GC is finished and then prevent the GC from starting until the destructor. Used 50*795d594fSAndroid Build Coastguard Worker // to prevent deadlocks in places where we call ClassLinker::VisitClass with all the threads 51*795d594fSAndroid Build Coastguard Worker // suspended. 52*795d594fSAndroid Build Coastguard Worker class ScopedGCCriticalSection { 53*795d594fSAndroid Build Coastguard Worker public: 54*795d594fSAndroid Build Coastguard Worker EXPORT ScopedGCCriticalSection(Thread* self, GcCause cause, CollectorType collector_type) 55*795d594fSAndroid Build Coastguard Worker ACQUIRE(Roles::uninterruptible_); 56*795d594fSAndroid Build Coastguard Worker EXPORT ~ScopedGCCriticalSection() RELEASE(Roles::uninterruptible_); 57*795d594fSAndroid Build Coastguard Worker 58*795d594fSAndroid Build Coastguard Worker private: 59*795d594fSAndroid Build Coastguard Worker GCCriticalSection critical_section_; 60*795d594fSAndroid Build Coastguard Worker const char* old_no_suspend_reason_; 61*795d594fSAndroid Build Coastguard Worker }; 62*795d594fSAndroid Build Coastguard Worker 63*795d594fSAndroid Build Coastguard Worker } // namespace gc 64*795d594fSAndroid Build Coastguard Worker } // namespace art 65*795d594fSAndroid Build Coastguard Worker 66*795d594fSAndroid Build Coastguard Worker #endif // ART_RUNTIME_GC_SCOPED_GC_CRITICAL_SECTION_H_ 67