text: // Copyright 2019 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
  //
  //      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 THIRD_PARTY_MLIR_EDGE_IREE_HAL_VULKAN_NATIVE_BINARY_SEMAPHORE_H_
  #define THIRD_PARTY_MLIR_EDGE_IREE_HAL_VULKAN_NATIVE_BINARY_SEMAPHORE_H_
  
  #include <vulkan/vulkan.h>
  
  #include "third_party/mlir_edge/iree/hal/semaphore.h"
  #include "third_party/mlir_edge/iree/hal/vulkan/handle_util.h"
  
  namespace iree {
  namespace hal {
  namespace vulkan {
  
  // A binary semaphore implemented using the native VkSemaphore type.
  // This is supported unconditionally on all versions of Vulkan.
  class NativeBinarySemaphore final : public BinarySemaphore {
   public:
    NativeBinarySemaphore(ref_ptr<VkDeviceHandle> logical_device,
                          VkSemaphore handle);
    ~NativeBinarySemaphore() override;
  
    VkSemaphore handle() const { return handle_; }
  
   private:
    ref_ptr<VkDeviceHandle> logical_device_;
    VkSemaphore handle_;
  };
  
  }  // namespace vulkan
  }  // namespace hal
  }  // namespace iree
  
  #endif  // THIRD_PARTY_MLIR_EDGE_IREE_HAL_VULKAN_NATIVE_BINARY_SEMAPHORE_H_
  