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      1 /*
      2  * Copyright (C) 2014 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_READ_BARRIER_C_H_
     18 #define ART_RUNTIME_READ_BARRIER_C_H_
     19 
     20 // This is a C (not C++) header file and is in a separate file (from
     21 // globals.h) because asm_support.h is a C header file and can't
     22 // include globals.h.
     23 
     24 // Uncomment one of the following two and the two fields in
     25 // Object.java (libcore) to enable baker or brooks pointers.
     26 
     27 // #define USE_BAKER_READ_BARRIER
     28 // #define USE_BROOKS_READ_BARRIER
     29 
     30 #if defined(USE_BAKER_READ_BARRIER) || defined(USE_BROOKS_READ_BARRIER)
     31 #define USE_BAKER_OR_BROOKS_READ_BARRIER
     32 #endif
     33 
     34 #if defined(USE_BAKER_READ_BARRIER) && defined(USE_BROOKS_READ_BARRIER)
     35 #error "Only one of Baker or Brooks can be enabled at a time."
     36 #endif
     37 
     38 // A placeholder marker to indicate places to add read barriers in the
     39 // assembly code. This is a development time aid and to be removed
     40 // after read barriers are added.
     41 #define THIS_LOAD_REQUIRES_READ_BARRIER
     42 
     43 #endif  // ART_RUNTIME_READ_BARRIER_C_H_
     44