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/*
* Copyright (C) 2014 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_READ_BARRIER_CONFIG_H_
#define ART_RUNTIME_READ_BARRIER_CONFIG_H_
// This is a mixed C-C++ header file that has a global section at the start
// and a C++ section at the end, because asm_support.h is a C header file and
// cannot include any C++ syntax.
// Global (C) part.
// Uncomment one of the following two and the two fields in
// Object.java (libcore) to enable baker, brooks (unimplemented), or
// table-lookup read barriers.
#ifdef ART_USE_READ_BARRIER
#if ART_READ_BARRIER_TYPE_IS_BAKER
#define USE_BAKER_READ_BARRIER
#elif ART_READ_BARRIER_TYPE_IS_BROOKS
#define USE_BROOKS_READ_BARRIER
#elif ART_READ_BARRIER_TYPE_IS_TABLELOOKUP
#define USE_TABLE_LOOKUP_READ_BARRIER
#else
#error "ART read barrier type must be set"
#endif
#endif // ART_USE_READ_BARRIER
#if defined(USE_BAKER_READ_BARRIER) || defined(USE_BROOKS_READ_BARRIER)
#define USE_BAKER_OR_BROOKS_READ_BARRIER
#endif
#if defined(USE_BAKER_READ_BARRIER) || defined(USE_BROOKS_READ_BARRIER) || defined(USE_TABLE_LOOKUP_READ_BARRIER)
#define USE_READ_BARRIER
#endif
#if defined(USE_BAKER_READ_BARRIER) && defined(USE_BROOKS_READ_BARRIER)
#error "Only one of Baker or Brooks can be enabled at a time."
#endif
// C++-specific configuration part..
#ifdef __cplusplus
namespace art {
#ifdef USE_BAKER_READ_BARRIER
static constexpr bool kUseBakerReadBarrier = true;
#else
static constexpr bool kUseBakerReadBarrier = false;
#endif
#ifdef USE_BROOKS_READ_BARRIER
static constexpr bool kUseBrooksReadBarrier = true;
#else
static constexpr bool kUseBrooksReadBarrier = false;
#endif
#ifdef USE_TABLE_LOOKUP_READ_BARRIER
static constexpr bool kUseTableLookupReadBarrier = true;
#else
static constexpr bool kUseTableLookupReadBarrier = false;
#endif
static constexpr bool kUseBakerOrBrooksReadBarrier = kUseBakerReadBarrier || kUseBrooksReadBarrier;
static constexpr bool kUseReadBarrier =
kUseBakerReadBarrier || kUseBrooksReadBarrier || kUseTableLookupReadBarrier;
// Debugging flag that forces the generation of read barriers, but
// does not trigger the use of the concurrent copying GC.
//
// TODO: Remove this flag when the read barriers compiler
// instrumentation is completed.
static constexpr bool kForceReadBarrier = false;
// TODO: Likewise, remove this flag when kForceReadBarrier is removed
// and replace it with kUseReadBarrier.
static constexpr bool kEmitCompilerReadBarrier = kForceReadBarrier || kUseReadBarrier;
} // namespace art
#endif // __cplusplus
#endif // ART_RUNTIME_READ_BARRIER_CONFIG_H_
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