// Copyright 2018 Google LLC

//

// 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 CC_CHECK_H_

#define CC_CHECK_H_

#include "absl/base/attributes.h"

#include "absl/base/optimization.h"

namespace minigo {

// MG_CHECK(cond) and MG_DCHECK(cond) halt the program, printing the current

// the given condition `cond` is not true. MG_CHECK is always enabled, MG_DCHECK

// is only enabled for debug builds (i.e. when NDEBUG is not defined).

// Ideally we'd use glog's CHECK macro, which serves the same purpose.

// Unfortunately TensorFlow's public headers define conflicting macros, which

// makes depending on both TensorFlow and glog difficult, so we avoid using

// glog altogether and define our own macros.

namespace internal {

void ABSL_ATTRIBUTE_NOINLINE CheckFail(const char* cond, const char* file,

int line);

} // namespace internal

#define MG_CHECK(cond) \

do { \

if (ABSL_PREDICT_FALSE(!(cond))) { \

internal::CheckFail(#cond, __FILE__, __LINE__); \

} \

} while (false)

#ifndef NDEBUG

#define MG_DCHECK MG_CHECK

#else

#define MG_DCHECK(cond) \

do { \

} while (false)

#endif

} // namespace minigo

#endif // CC_CHECK_H_