text: // Copyright 2017 The Abseil Authors.
  //
  // 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
  //
  //      https://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 ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_
  #define ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_
  
  #include "absl/base/internal/atomic_hook.h"
  
  namespace absl {
  namespace atomic_hook_internal {
  
  using VoidF = void (*)();
  extern absl::base_internal::AtomicHook<VoidF> func;
  extern int default_func_calls;
  void DefaultFunc();
  void RegisterFunc(VoidF func);
  
  }  // namespace atomic_hook_internal
  }  // namespace absl
  
  #endif  // ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_
  