1 /*
2  * Copyright (C) 2018 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_RACING_CHECK_H_
18 #define ART_RUNTIME_GC_RACING_CHECK_H_
19 
20 #include <unistd.h>
21 #include <android-base/logging.h>
22 
23 // For checking purposes, we occasionally compare global counter values.
24 // These counters are generally updated without ordering constraints, and hence
25 // we may actually see inconsistent values when checking. To minimize spurious
26 // failures, try twice with an intervening short sleep. This is a hack not used
27 // in production builds.
28 #define RACING_DCHECK_LE(x, y) \
29   if (::android::base::kEnableDChecks && ((x) > (y))) { usleep(1000); CHECK_LE(x, y); }
30 
31 #endif  // ART_RUNTIME_GC_RACING_CHECK_H_
32