/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_READ_BARRIER_CONFIG_H_
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#define ART_RUNTIME_READ_BARRIER_CONFIG_H_
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// This is a mixed C-C++ header file that has a global section at the start
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// and a C++ section at the end, because asm_support.h is a C header file and
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// cannot include any C++ syntax.
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// Global (C) part.
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// Uncomment one of the following two and the two fields in
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// Object.java (libcore) to enable baker, brooks (unimplemented), or
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// table-lookup read barriers.
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#ifdef ART_USE_READ_BARRIER
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#if ART_READ_BARRIER_TYPE_IS_BAKER
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#define USE_BAKER_READ_BARRIER
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#elif ART_READ_BARRIER_TYPE_IS_BROOKS
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#define USE_BROOKS_READ_BARRIER
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#elif ART_READ_BARRIER_TYPE_IS_TABLELOOKUP
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#define USE_TABLE_LOOKUP_READ_BARRIER
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#else
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#error "ART read barrier type must be set"
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#endif
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#endif // ART_USE_READ_BARRIER
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#if defined(USE_BAKER_READ_BARRIER) || defined(USE_BROOKS_READ_BARRIER)
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#define USE_BAKER_OR_BROOKS_READ_BARRIER
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#endif
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#if defined(USE_BAKER_READ_BARRIER) || defined(USE_BROOKS_READ_BARRIER) || defined(USE_TABLE_LOOKUP_READ_BARRIER)
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#define USE_READ_BARRIER
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#endif
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#if defined(USE_BAKER_READ_BARRIER) && defined(USE_BROOKS_READ_BARRIER)
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#error "Only one of Baker or Brooks can be enabled at a time."
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#endif
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// C++-specific configuration part..
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#ifdef __cplusplus
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namespace art {
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#ifdef USE_BAKER_READ_BARRIER
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static constexpr bool kUseBakerReadBarrier = true;
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#else
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static constexpr bool kUseBakerReadBarrier = false;
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#endif
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#ifdef USE_BROOKS_READ_BARRIER
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static constexpr bool kUseBrooksReadBarrier = true;
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#else
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static constexpr bool kUseBrooksReadBarrier = false;
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#endif
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#ifdef USE_TABLE_LOOKUP_READ_BARRIER
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static constexpr bool kUseTableLookupReadBarrier = true;
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#else
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static constexpr bool kUseTableLookupReadBarrier = false;
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#endif
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static constexpr bool kUseBakerOrBrooksReadBarrier = kUseBakerReadBarrier || kUseBrooksReadBarrier;
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static constexpr bool kUseReadBarrier =
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kUseBakerReadBarrier || kUseBrooksReadBarrier || kUseTableLookupReadBarrier;
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// Debugging flag that forces the generation of read barriers, but
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// does not trigger the use of the concurrent copying GC.
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//
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// TODO: Remove this flag when the read barriers compiler
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// instrumentation is completed.
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static constexpr bool kForceReadBarrier = false;
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// TODO: Likewise, remove this flag when kForceReadBarrier is removed
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// and replace it with kUseReadBarrier.
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static constexpr bool kEmitCompilerReadBarrier = kForceReadBarrier || kUseReadBarrier;
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} // namespace art
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#endif // __cplusplus
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#endif // ART_RUNTIME_READ_BARRIER_CONFIG_H_
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