switch to unique_ptr.

Author: manon-traverse

include/API/Device.h

@@ -84,7 +84,7 @@ class Device {
 
   virtual Queue &getGraphicsQueue() = 0;
 
-  virtual llvm::Expected<std::shared_ptr<Fence>>
+  virtual llvm::Expected<std::unique_ptr<Fence>>
   createFence(llvm::StringRef Name) = 0;
 
   virtual llvm::Expected<std::shared_ptr<Buffer>>

lib/API/DX/Device.cpp

@@ -417,7 +417,7 @@ class DXDevice : public offloadtest::Device {
 
   Queue &getGraphicsQueue() override { return GraphicsQueue; }
 
-  llvm::Expected<std::shared_ptr<offloadtest::Fence>>
+  llvm::Expected<std::unique_ptr<offloadtest::Fence>>
   createFence(llvm::StringRef Name) override {
     ComPtr<ID3D12Fence> Fence;
     if (auto Err = HR::toError(

lib/API/MTL/MTLDevice.cpp

@@ -598,7 +598,7 @@ class MTLDevice : public offloadtest::Device {
 
   Queue &getGraphicsQueue() override { return GraphicsQueue; }
 
-  llvm::Expected<std::shared_ptr<offloadtest::Fence>>
+  llvm::Expected<std::unique_ptr<offloadtest::Fence>>
   createFence(llvm::StringRef Name) override {
     MTL::SharedEvent *Event = Device->newSharedEvent();
     if (!Event)

lib/API/VK/Device.cpp

@@ -530,7 +530,7 @@ class VulkanDevice : public offloadtest::Device {
     VkPipelineCache PipelineCache = VK_NULL_HANDLE;
     VkPipeline Pipeline = VK_NULL_HANDLE;
 
-    std::shared_ptr<Fence> Fence;
+    std::unique_ptr<Fence> Fence;
 
     // FrameBuffer associated data for offscreen rendering.
     VkFramebuffer FrameBuffer = VK_NULL_HANDLE;
@@ -694,7 +694,7 @@ class VulkanDevice : public offloadtest::Device {
 
   Queue &getGraphicsQueue() override { return GraphicsQueue; }
 
-  llvm::Expected<std::shared_ptr<offloadtest::Fence>>
+  llvm::Expected<std::unique_ptr<offloadtest::Fence>>
   createFence(llvm::StringRef Name) override {
     VkSemaphoreTypeCreateInfo TypeCreateInfo = {};
     TypeCreateInfo.sType = VK_STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO;