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      1 /*
      2  * Copyright (C) 2013 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_COLLECTOR_TYPE_H_
     18 #define ART_RUNTIME_GC_COLLECTOR_TYPE_H_
     19 
     20 #include <iosfwd>
     21 
     22 namespace art {
     23 namespace gc {
     24 
     25 // Which types of collections are able to be performed.
     26 enum CollectorType {
     27   // No collector selected.
     28   kCollectorTypeNone,
     29   // Non concurrent mark-sweep.
     30   kCollectorTypeMS,
     31   // Concurrent mark-sweep.
     32   kCollectorTypeCMS,
     33   // Semi-space / mark-sweep hybrid, enables compaction.
     34   kCollectorTypeSS,
     35   // A generational variant of kCollectorTypeSS.
     36   kCollectorTypeGSS,
     37   // Mark compact collector.
     38   kCollectorTypeMC,
     39   // Heap trimming collector, doesn't do any actual collecting.
     40   kCollectorTypeHeapTrim,
     41   // A (mostly) concurrent copying collector.
     42   kCollectorTypeCC,
     43   // Instrumentation critical section fake collector.
     44   kCollectorTypeInstrumentation,
     45   // Fake collector for adding or removing application image spaces.
     46   kCollectorTypeAddRemoveAppImageSpace,
     47   // A homogeneous space compaction collector used in background transition
     48   // when both foreground and background collector are CMS.
     49   kCollectorTypeHomogeneousSpaceCompact,
     50   // Class linker fake collector.
     51   kCollectorTypeClassLinker,
     52   // JIT Code cache fake collector.
     53   kCollectorTypeJitCodeCache,
     54 };
     55 std::ostream& operator<<(std::ostream& os, const CollectorType& collector_type);
     56 
     57 static constexpr CollectorType kCollectorTypeDefault =
     58 #if ART_DEFAULT_GC_TYPE_IS_CMS
     59     kCollectorTypeCMS
     60 #elif ART_DEFAULT_GC_TYPE_IS_SS
     61     kCollectorTypeSS
     62 #elif ART_DEFAULT_GC_TYPE_IS_GSS
     63     kCollectorTypeGSS
     64 #else
     65     kCollectorTypeCMS
     66 #error "ART default GC type must be set"
     67 #endif
     68     ;  // NOLINT [whitespace/semicolon] [5]
     69 
     70 }  // namespace gc
     71 }  // namespace art
     72 
     73 #endif  // ART_RUNTIME_GC_COLLECTOR_TYPE_H_
     74