D3D12: Support creating compute pipeline asynchronously

This patch implements the asynchronous path of CreateComputePipelineAsync
on D3D12 backend with the basic framework of the dawn_unittest
AsyncTaskTest.Basic.

1. Call the constructor of dawn_native::d3d12::ComputePipeline in the main
   thread.
2. Execute dawn_native::ComputePipelineBase::Initialize() (a virtual function)
   asynchronously.
3. Ensure every operation in dawn_native::d3d12::ComputePipeline::Initialize()
   is thread-safe (PersistentCache).
4. Save all the return values (pipeline object or error message, userdata, etc)
   in a CreateComputePipelineAsyncWaitableCallbackTask object and insert this
   callback task into CallbackTaskManager.
5. In Callback.Finish():
- Insert the pipeline object into the pipeline cache if necessary
- Call WGPUCreateComputePipelineAsyncCallback

Note that as we always handle the front-end pipeline cache in the main thread,
we don't need to make it thread-safe right now.

BUG=dawn:529
TEST=dawn_end2end_tests

Change-Id: I7eba2ce550b32439a94b2a4d1aa7f1b3383aa514
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/47900
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

src/dawn_native/AsyncTask.cpp

@@ -4,11 +4,11 @@
 
 namespace dawn_native {
 
-    AsnycTaskManager::AsnycTaskManager(dawn_platform::WorkerTaskPool* workerTaskPool)
+    AsyncTaskManager::AsyncTaskManager(dawn_platform::WorkerTaskPool* workerTaskPool)
         : mWorkerTaskPool(workerTaskPool) {
     }
 
-    void AsnycTaskManager::PostTask(AsyncTask asyncTask) {
+    void AsyncTaskManager::PostTask(AsyncTask asyncTask) {
         // If these allocations becomes expensive, we can slab-allocate tasks.
         Ref<WaitableTask> waitableTask = AcquireRef(new WaitableTask());
         waitableTask->taskManager = this;
@@ -30,7 +30,7 @@ namespace dawn_native {
             mWorkerTaskPool->PostWorkerTask(DoWaitableTask, waitableTask.Get());
     }
 
-    void AsnycTaskManager::HandleTaskCompletion(WaitableTask* task) {
+    void AsyncTaskManager::HandleTaskCompletion(WaitableTask* task) {
         std::lock_guard<std::mutex> lock(mPendingTasksMutex);
         auto iter = mPendingTasks.find(task);
         if (iter != mPendingTasks.end()) {
@@ -38,7 +38,7 @@ namespace dawn_native {
         }
     }
 
-    void AsnycTaskManager::WaitAllPendingTasks() {
+    void AsyncTaskManager::WaitAllPendingTasks() {
         std::unordered_map<WaitableTask*, Ref<WaitableTask>> allPendingTasks;
 
         {
@@ -51,7 +51,12 @@ namespace dawn_native {
         }
     }
 
-    void AsnycTaskManager::DoWaitableTask(void* task) {
+    bool AsyncTaskManager::HasPendingTasks() {
+        std::lock_guard<std::mutex> lock(mPendingTasksMutex);
+        return !mPendingTasks.empty();
+    }
+
+    void AsyncTaskManager::DoWaitableTask(void* task) {
         Ref<WaitableTask> waitableTask = AcquireRef(static_cast<WaitableTask*>(task));
         waitableTask->asyncTask();
         waitableTask->taskManager->HandleTaskCompletion(waitableTask.Get());

src/dawn_native/AsyncTask.h

@@ -36,18 +36,19 @@ namespace dawn_native {
     // task if we need it for synchronous pipeline compilation.
     using AsyncTask = std::function<void()>;
 
-    class AsnycTaskManager {
+    class AsyncTaskManager {
       public:
-        explicit AsnycTaskManager(dawn_platform::WorkerTaskPool* workerTaskPool);
+        explicit AsyncTaskManager(dawn_platform::WorkerTaskPool* workerTaskPool);
 
         void PostTask(AsyncTask asyncTask);
         void WaitAllPendingTasks();
+        bool HasPendingTasks();
 
       private:
         class WaitableTask : public RefCounted {
           public:
             AsyncTask asyncTask;
-            AsnycTaskManager* taskManager;
+            AsyncTaskManager* taskManager;
             std::unique_ptr<dawn_platform::WaitableEvent> waitableEvent;
         };
 

src/dawn_native/ComputePipeline.cpp

@@ -56,6 +56,10 @@ namespace dawn_native {
         }
     }
 
+    MaybeError ComputePipelineBase::Initialize(const ComputePipelineDescriptor* descriptor) {
+        return {};
+    }
+
     // static
     ComputePipelineBase* ComputePipelineBase::MakeError(DeviceBase* device) {
         return new ComputePipelineBase(device, ObjectBase::kError);

src/dawn_native/ComputePipeline.h

@@ -39,6 +39,11 @@ namespace dawn_native {
 
       private:
         ComputePipelineBase(DeviceBase* device, ObjectBase::ErrorTag tag);
+
+        // CreateComputePipelineAsyncTask is declared as a friend of ComputePipelineBase as it
+        // needs to call the private member function ComputePipelineBase::Initialize().
+        friend class CreateComputePipelineAsyncTask;
+        virtual MaybeError Initialize(const ComputePipelineDescriptor* descriptor);
     };
 
 }  // namespace dawn_native

src/dawn_native/CreatePipelineAsyncTask.cpp

@@ -14,6 +14,7 @@
 
 #include "dawn_native/CreatePipelineAsyncTask.h"
 
+#include "dawn_native/AsyncTask.h"
 #include "dawn_native/ComputePipeline.h"
 #include "dawn_native/Device.h"
 #include "dawn_native/RenderPipeline.h"
@@ -100,4 +101,58 @@ namespace dawn_native {
                                            "Device lost before callback", mUserData);
     }
 
+    CreateComputePipelineAsyncTask::CreateComputePipelineAsyncTask(
+        Ref<ComputePipelineBase> nonInitializedComputePipeline,
+        const ComputePipelineDescriptor* descriptor,
+        size_t blueprintHash,
+        WGPUCreateComputePipelineAsyncCallback callback,
+        void* userdata)
+        : mComputePipeline(nonInitializedComputePipeline),
+          mBlueprintHash(blueprintHash),
+          mCallback(callback),
+          mUserdata(userdata),
+          mLabel(descriptor->label != nullptr ? descriptor->label : ""),
+          mLayout(descriptor->layout),
+          mEntryPoint(descriptor->computeStage.entryPoint),
+          mComputeShaderModule(descriptor->computeStage.module) {
+        ASSERT(mComputePipeline != nullptr);
+
+        // TODO(jiawei.shao@intel.com): save nextInChain when it is supported in Dawn.
+        ASSERT(descriptor->nextInChain == nullptr);
+    }
+
+    void CreateComputePipelineAsyncTask::Run() {
+        ComputePipelineDescriptor descriptor;
+        if (!mLabel.empty()) {
+            descriptor.label = mLabel.c_str();
+        }
+        descriptor.computeStage.entryPoint = mEntryPoint.c_str();
+        descriptor.layout = mLayout.Get();
+        descriptor.computeStage.module = mComputeShaderModule.Get();
+        MaybeError maybeError = mComputePipeline->Initialize(&descriptor);
+        std::string errorMessage;
+        if (maybeError.IsError()) {
+            mComputePipeline = nullptr;
+            errorMessage = maybeError.AcquireError()->GetMessage();
+        }
+
+        mComputeShaderModule = nullptr;
+        mComputePipeline->GetDevice()->AddComputePipelineAsyncCallbackTask(
+            mComputePipeline, errorMessage, mCallback, mUserdata, mBlueprintHash);
+    }
+
+    void CreateComputePipelineAsyncTask::RunAsync(
+        std::unique_ptr<CreateComputePipelineAsyncTask> task) {
+        DeviceBase* device = task->mComputePipeline->GetDevice();
+
+        // Using "taskPtr = std::move(task)" causes compilation error while it should be supported
+        // since C++14:
+        // https://docs.microsoft.com/en-us/cpp/cpp/lambda-expressions-in-cpp?view=msvc-160
+        auto asyncTask = [taskPtr = task.release()] {
+            std::unique_ptr<CreateComputePipelineAsyncTask> innnerTaskPtr(taskPtr);
+            innnerTaskPtr->Run();
+        };
+        device->GetAsyncTaskManager()->PostTask(std::move(asyncTask));
+    }
+
 }  // namespace dawn_native

src/dawn_native/CreatePipelineAsyncTask.h

@@ -18,12 +18,16 @@
 #include "common/RefCounted.h"
 #include "dawn/webgpu.h"
 #include "dawn_native/CallbackTaskManager.h"
+#include "dawn_native/Error.h"
 
 namespace dawn_native {
 
     class ComputePipelineBase;
     class DeviceBase;
+    class PipelineLayoutBase;
     class RenderPipelineBase;
+    class ShaderModuleBase;
+    struct ComputePipelineDescriptor;
 
     struct CreatePipelineAsyncCallbackTaskBase : CallbackTask {
         CreatePipelineAsyncCallbackTaskBase(std::string errorMessage, void* userData);
@@ -33,17 +37,17 @@ namespace dawn_native {
         void* mUserData;
     };
 
-    struct CreateComputePipelineAsyncCallbackTask final : CreatePipelineAsyncCallbackTaskBase {
+    struct CreateComputePipelineAsyncCallbackTask : CreatePipelineAsyncCallbackTaskBase {
         CreateComputePipelineAsyncCallbackTask(Ref<ComputePipelineBase> pipeline,
                                                std::string errorMessage,
                                                WGPUCreateComputePipelineAsyncCallback callback,
                                                void* userdata);
 
-        void Finish() final;
+        void Finish() override;
         void HandleShutDown() final;
         void HandleDeviceLoss() final;
 
-      private:
+      protected:
         Ref<ComputePipelineBase> mPipeline;
         WGPUCreateComputePipelineAsyncCallback mCreateComputePipelineAsyncCallback;
     };
@@ -63,6 +67,37 @@ namespace dawn_native {
         WGPUCreateRenderPipelineAsyncCallback mCreateRenderPipelineAsyncCallback;
     };
 
+    // CreateComputePipelineAsyncTask defines all the inputs and outputs of
+    // CreateComputePipelineAsync() tasks, which are the same among all the backends.
+    // TODO(crbug.com/dawn/529): Define a "flat descriptor"
+    // (like utils::ComboRenderPipelineDescriptor) in ComputePipeline.h that's reused here and for
+    // caching, etc. ValidateComputePipelineDescriptor() could produce that flat descriptor so that
+    // it is reused in other places.
+    class CreateComputePipelineAsyncTask {
+      public:
+        CreateComputePipelineAsyncTask(Ref<ComputePipelineBase> nonInitializedComputePipeline,
+                                       const ComputePipelineDescriptor* descriptor,
+                                       size_t blueprintHash,
+                                       WGPUCreateComputePipelineAsyncCallback callback,
+                                       void* userdata);
+
+        virtual ~CreateComputePipelineAsyncTask() = default;
+        void Run();
+
+        static void RunAsync(std::unique_ptr<CreateComputePipelineAsyncTask> task);
+
+      protected:
+        Ref<ComputePipelineBase> mComputePipeline;
+        size_t mBlueprintHash;
+        WGPUCreateComputePipelineAsyncCallback mCallback;
+        void* mUserdata;
+
+        std::string mLabel;
+        Ref<PipelineLayoutBase> mLayout;
+        std::string mEntryPoint;
+        Ref<ShaderModuleBase> mComputeShaderModule;
+    };
+
 }  // namespace dawn_native
 
 #endif  // DAWNNATIVE_CREATEPIPELINEASYNCTASK_H_

src/dawn_native/Device.cpp

@@ -16,11 +16,11 @@
 
 #include "common/Log.h"
 #include "dawn_native/Adapter.h"
+#include "dawn_native/AsyncTask.h"
 #include "dawn_native/AttachmentState.h"
 #include "dawn_native/BindGroup.h"
 #include "dawn_native/BindGroupLayout.h"
 #include "dawn_native/Buffer.h"
-#include "dawn_native/CallbackTaskManager.h"
 #include "dawn_native/CommandBuffer.h"
 #include "dawn_native/CommandEncoder.h"
 #include "dawn_native/CompilationMessages.h"
@@ -44,6 +44,7 @@
 #include "dawn_native/SwapChain.h"
 #include "dawn_native/Texture.h"
 #include "dawn_native/ValidationUtils_autogen.h"
+#include "dawn_platform/DawnPlatform.h"
 
 #include <unordered_set>
 
@@ -130,6 +131,10 @@ namespace dawn_native {
         mInternalPipelineStore = std::make_unique<InternalPipelineStore>();
         mPersistentCache = std::make_unique<PersistentCache>(this);
 
+        ASSERT(GetPlatform() != nullptr);
+        mWorkerTaskPool = GetPlatform()->CreateWorkerTaskPool();
+        mAsyncTaskManager = std::make_unique<AsyncTaskManager>(mWorkerTaskPool.get());
+
         // Starting from now the backend can start doing reentrant calls so the device is marked as
         // alive.
         mState = State::Alive;
@@ -143,6 +148,8 @@ namespace dawn_native {
         // Skip handling device facilities if they haven't even been created (or failed doing so)
         if (mState != State::BeingCreated) {
             // Call all the callbacks immediately as the device is about to shut down.
+            // TODO(crbug.com/dawn/826): Cancel the tasks that are in flight if possible.
+            mAsyncTaskManager->WaitAllPendingTasks();
             auto callbackTasks = mCallbackTaskManager->AcquireCallbackTasks();
             for (std::unique_ptr<CallbackTask>& callbackTask : callbackTasks) {
                 callbackTask->HandleShutDown();
@@ -192,6 +199,7 @@ namespace dawn_native {
 
         mDynamicUploader = nullptr;
         mCallbackTaskManager = nullptr;
+        mAsyncTaskManager = nullptr;
         mPersistentCache = nullptr;
 
         mEmptyBindGroupLayout = nullptr;
@@ -241,6 +249,9 @@ namespace dawn_native {
             }
 
             mQueue->HandleDeviceLoss();
+
+            // TODO(crbug.com/dawn/826): Cancel the tasks that are in flight if possible.
+            mAsyncTaskManager->WaitAllPendingTasks();
             auto callbackTasks = mCallbackTaskManager->AcquireCallbackTasks();
             for (std::unique_ptr<CallbackTask>& callbackTask : callbackTasks) {
                 callbackTask->HandleDeviceLoss();
@@ -393,6 +404,10 @@ namespace dawn_native {
     }
 
     bool DeviceBase::IsDeviceIdle() {
+        if (mAsyncTaskManager->HasPendingTasks()) {
+            return false;
+        }
+
         ExecutionSerial maxSerial = std::max(mLastSubmittedSerial, mFutureSerial);
         if (mCompletedSerial == maxSerial) {
             return true;
@@ -1271,4 +1286,60 @@ namespace dawn_native {
         }
     }
 
+    AsyncTaskManager* DeviceBase::GetAsyncTaskManager() const {
+        return mAsyncTaskManager.get();
+    }
+
+    CallbackTaskManager* DeviceBase::GetCallbackTaskManager() const {
+        return mCallbackTaskManager.get();
+    }
+
+    dawn_platform::WorkerTaskPool* DeviceBase::GetWorkerTaskPool() const {
+        return mWorkerTaskPool.get();
+    }
+
+    void DeviceBase::AddComputePipelineAsyncCallbackTask(
+        Ref<ComputePipelineBase> pipeline,
+        std::string errorMessage,
+        WGPUCreateComputePipelineAsyncCallback callback,
+        void* userdata,
+        size_t blueprintHash) {
+        // CreateComputePipelineAsyncWaitableCallbackTask is declared as an internal class as it
+        // needs to call the private member function DeviceBase::AddOrGetCachedPipeline().
+        struct CreateComputePipelineAsyncWaitableCallbackTask final
+            : CreateComputePipelineAsyncCallbackTask {
+            CreateComputePipelineAsyncWaitableCallbackTask(
+                Ref<ComputePipelineBase> pipeline,
+                std::string errorMessage,
+                WGPUCreateComputePipelineAsyncCallback callback,
+                void* userdata,
+                size_t blueprintHash)
+                : CreateComputePipelineAsyncCallbackTask(std::move(pipeline),
+                                                         errorMessage,
+                                                         callback,
+                                                         userdata),
+                  mBlueprintHash(blueprintHash) {
+            }
+
+            void Finish() final {
+                // TODO(jiawei.shao@intel.com): call AddOrGetCachedPipeline() asynchronously in
+                // CreateComputePipelineAsyncTaskImpl::Run() when the front-end pipeline cache is
+                // thread-safe.
+                if (mPipeline.Get() != nullptr) {
+                    mPipeline =
+                        mPipeline->GetDevice()->AddOrGetCachedPipeline(mPipeline, mBlueprintHash);
+                }
+
+                CreateComputePipelineAsyncCallbackTask::Finish();
+            }
+
+          private:
+            size_t mBlueprintHash;
+        };
+
+        mCallbackTaskManager->AddCallbackTask(
+            std::make_unique<CreateComputePipelineAsyncWaitableCallbackTask>(
+                std::move(pipeline), errorMessage, callback, userdata, blueprintHash));
+    }
+
 }  // namespace dawn_native

src/dawn_native/Device.h

@@ -26,11 +26,15 @@
 #include "dawn_native/DawnNative.h"
 #include "dawn_native/dawn_platform.h"
 
-#include <memory>
 #include <utility>
 
+namespace dawn_platform {
+    class WorkerTaskPool;
+}  // namespace dawn_platform
+
 namespace dawn_native {
     class AdapterBase;
+    class AsyncTaskManager;
     class AttachmentState;
     class AttachmentStateBlueprint;
     class BindGroupLayoutBase;
@@ -41,6 +45,7 @@ namespace dawn_native {
     class OwnedCompilationMessages;
     class PersistentCache;
     class StagingBufferBase;
+    struct CallbackTask;
     struct InternalPipelineStore;
     struct ShaderModuleParseResult;
 
@@ -278,6 +283,16 @@ namespace dawn_native {
 
         virtual float GetTimestampPeriodInNS() const = 0;
 
+        AsyncTaskManager* GetAsyncTaskManager() const;
+        CallbackTaskManager* GetCallbackTaskManager() const;
+        dawn_platform::WorkerTaskPool* GetWorkerTaskPool() const;
+
+        void AddComputePipelineAsyncCallbackTask(Ref<ComputePipelineBase> pipeline,
+                                                 std::string errorMessage,
+                                                 WGPUCreateComputePipelineAsyncCallback callback,
+                                                 void* userdata,
+                                                 size_t blueprintHash);
+
       protected:
         void SetToggle(Toggle toggle, bool isEnabled);
         void ForceSetToggle(Toggle toggle, bool isEnabled);
@@ -332,7 +347,7 @@ namespace dawn_native {
             const ComputePipelineDescriptor* descriptor);
         Ref<ComputePipelineBase> AddOrGetCachedPipeline(Ref<ComputePipelineBase> computePipeline,
                                                         size_t blueprintHash);
-        void CreateComputePipelineAsyncImpl(const ComputePipelineDescriptor* descriptor,
+        virtual void CreateComputePipelineAsyncImpl(const ComputePipelineDescriptor* descriptor,
                                                     size_t blueprintHash,
                                                     WGPUCreateComputePipelineAsyncCallback callback,
                                                     void* userdata);
@@ -398,7 +413,7 @@ namespace dawn_native {
         Ref<BindGroupLayoutBase> mEmptyBindGroupLayout;
 
         std::unique_ptr<DynamicUploader> mDynamicUploader;
-        std::unique_ptr<CallbackTaskManager> mCallbackTaskManager;
+        std::unique_ptr<AsyncTaskManager> mAsyncTaskManager;
         Ref<QueueBase> mQueue;
 
         struct DeprecationWarnings;
@@ -417,6 +432,9 @@ namespace dawn_native {
         std::unique_ptr<InternalPipelineStore> mInternalPipelineStore;
 
         std::unique_ptr<PersistentCache> mPersistentCache;
+
+        std::unique_ptr<CallbackTaskManager> mCallbackTaskManager;
+        std::unique_ptr<dawn_platform::WorkerTaskPool> mWorkerTaskPool;
     };
 
 }  // namespace dawn_native

src/dawn_native/Instance.cpp

@@ -18,6 +18,7 @@
 #include "common/Log.h"
 #include "dawn_native/ErrorData.h"
 #include "dawn_native/Surface.h"
+#include "dawn_platform/DawnPlatform.h"
 
 #if defined(DAWN_USE_X11)
 #    include "dawn_native/XlibXcbFunctions.h"
@@ -64,6 +65,7 @@ namespace dawn_native {
         return instance.Detach();
     }
 
+    // TODO(crbug.com/dawn/832): make the platform an initialization parameter of the instance.
     bool InstanceBase::Initialize(const InstanceDescriptor*) {
         return true;
     }
@@ -225,10 +227,17 @@ namespace dawn_native {
         mPlatform = platform;
     }
 
-    dawn_platform::Platform* InstanceBase::GetPlatform() const {
+    dawn_platform::Platform* InstanceBase::GetPlatform() {
+        if (mPlatform != nullptr) {
             return mPlatform;
         }
 
+        if (mDefaultPlatform == nullptr) {
+            mDefaultPlatform = std::make_unique<dawn_platform::Platform>();
+        }
+        return mDefaultPlatform.get();
+    }
+
     const XlibXcbFunctions* InstanceBase::GetOrCreateXlibXcbFunctions() {
 #if defined(DAWN_USE_X11)
         if (mXlibXcbFunctions == nullptr) {

src/dawn_native/Instance.h

@@ -27,6 +27,10 @@
 #include <unordered_map>
 #include <vector>
 
+namespace dawn_platform {
+    class Platform;
+}  // namespace dawn_platform
+
 namespace dawn_native {
 
     class Surface;
@@ -66,7 +70,7 @@ namespace dawn_native {
         bool IsBeginCaptureOnStartupEnabled() const;
 
         void SetPlatform(dawn_platform::Platform* platform);
-        dawn_platform::Platform* GetPlatform() const;
+        dawn_platform::Platform* GetPlatform();
 
         // Get backend-independent libraries that need to be loaded dynamically.
         const XlibXcbFunctions* GetOrCreateXlibXcbFunctions();
@@ -95,6 +99,7 @@ namespace dawn_native {
         BackendValidationLevel mBackendValidationLevel = BackendValidationLevel::Disabled;
 
         dawn_platform::Platform* mPlatform = nullptr;
+        std::unique_ptr<dawn_platform::Platform> mDefaultPlatform;
 
         std::vector<std::unique_ptr<BackendConnection>> mBackends;
         std::vector<std::unique_ptr<AdapterBase>> mAdapters;

src/dawn_native/PersistentCache.cpp

@@ -29,6 +29,7 @@ namespace dawn_native {
         if (mCache == nullptr) {
             return blob;
         }
+        std::lock_guard<std::mutex> lock(mMutex);
         blob.bufferSize = mCache->LoadData(reinterpret_cast<WGPUDevice>(mDevice), key.data(),
                                            key.size(), nullptr, 0);
         if (blob.bufferSize > 0) {
@@ -48,6 +49,7 @@ namespace dawn_native {
         }
         ASSERT(value != nullptr);
         ASSERT(size > 0);
+        std::lock_guard<std::mutex> lock(mMutex);
         mCache->StoreData(reinterpret_cast<WGPUDevice>(mDevice), key.data(), key.size(), value,
                           size);
     }

src/dawn_native/PersistentCache.h

@@ -17,6 +17,7 @@
 
 #include "dawn_native/Error.h"
 
+#include <mutex>
 #include <vector>
 
 namespace dawn_platform {
@@ -36,6 +37,10 @@ namespace dawn_native {
 
     enum class PersistentKeyType { Shader };
 
+    // This class should always be thread-safe as it is used in Create*PipelineAsync() where it is
+    // called asynchronously.
+    // The thread-safety of any access to mCache (the function LoadData() and StoreData()) is
+    // protected by mMutex.
     class PersistentCache {
       public:
         PersistentCache(DeviceBase* device);
@@ -79,6 +84,7 @@ namespace dawn_native {
 
         DeviceBase* mDevice = nullptr;
 
+        std::mutex mMutex;
         dawn_platform::CachingInterface* mCache = nullptr;
     };
 }  // namespace dawn_native

src/dawn_native/d3d12/ComputePipelineD3D12.cpp

@@ -14,7 +14,8 @@
 
 #include "dawn_native/d3d12/ComputePipelineD3D12.h"
 
-#include "common/Assert.h"
+#include "dawn_native/AsyncTask.h"
+#include "dawn_native/CreatePipelineAsyncTask.h"
 #include "dawn_native/d3d12/D3D12Error.h"
 #include "dawn_native/d3d12/DeviceD3D12.h"
 #include "dawn_native/d3d12/PipelineLayoutD3D12.h"
@@ -68,4 +69,16 @@ namespace dawn_native { namespace d3d12 {
         return mPipelineState.Get();
     }
 
+    void ComputePipeline::CreateAsync(Device* device,
+                                      const ComputePipelineDescriptor* descriptor,
+                                      size_t blueprintHash,
+                                      WGPUCreateComputePipelineAsyncCallback callback,
+                                      void* userdata) {
+        Ref<ComputePipeline> pipeline = AcquireRef(new ComputePipeline(device, descriptor));
+        std::unique_ptr<CreateComputePipelineAsyncTask> asyncTask =
+            std::make_unique<CreateComputePipelineAsyncTask>(pipeline, descriptor, blueprintHash,
+                                                             callback, userdata);
+        CreateComputePipelineAsyncTask::RunAsync(std::move(asyncTask));
+    }
+
 }}  // namespace dawn_native::d3d12

src/dawn_native/d3d12/ComputePipelineD3D12.h

@@ -28,6 +28,11 @@ namespace dawn_native { namespace d3d12 {
         static ResultOrError<Ref<ComputePipeline>> Create(
             Device* device,
             const ComputePipelineDescriptor* descriptor);
+        static void CreateAsync(Device* device,
+                                const ComputePipelineDescriptor* descriptor,
+                                size_t blueprintHash,
+                                WGPUCreateComputePipelineAsyncCallback callback,
+                                void* userdata);
         ComputePipeline() = delete;
 
         ID3D12PipelineState* GetPipelineState() const;
@@ -35,7 +40,7 @@ namespace dawn_native { namespace d3d12 {
       private:
         ~ComputePipeline() override;
         using ComputePipelineBase::ComputePipelineBase;
-        MaybeError Initialize(const ComputePipelineDescriptor* descriptor);
+        MaybeError Initialize(const ComputePipelineDescriptor* descriptor) override;
         ComPtr<ID3D12PipelineState> mPipelineState;
     };
 

src/dawn_native/d3d12/DeviceD3D12.cpp

@@ -363,6 +363,12 @@ namespace dawn_native { namespace d3d12 {
         const TextureViewDescriptor* descriptor) {
         return TextureView::Create(texture, descriptor);
     }
+    void Device::CreateComputePipelineAsyncImpl(const ComputePipelineDescriptor* descriptor,
+                                                size_t blueprintHash,
+                                                WGPUCreateComputePipelineAsyncCallback callback,
+                                                void* userdata) {
+        ComputePipeline::CreateAsync(this, descriptor, blueprintHash, callback, userdata);
+    }
 
     ResultOrError<std::unique_ptr<StagingBufferBase>> Device::CreateStagingBuffer(size_t size) {
         std::unique_ptr<StagingBufferBase> stagingBuffer =

src/dawn_native/d3d12/DeviceD3D12.h

@@ -171,6 +171,10 @@ namespace dawn_native { namespace d3d12 {
         ResultOrError<Ref<TextureViewBase>> CreateTextureViewImpl(
             TextureBase* texture,
             const TextureViewDescriptor* descriptor) override;
+        void CreateComputePipelineAsyncImpl(const ComputePipelineDescriptor* descriptor,
+                                            size_t blueprintHash,
+                                            WGPUCreateComputePipelineAsyncCallback callback,
+                                            void* userdata) override;
 
         void ShutDownImpl() override;
         MaybeError WaitForIdleForDestruction() override;

src/dawn_native/metal/ComputePipelineMTL.h

@@ -37,7 +37,7 @@ namespace dawn_native { namespace metal {
 
       private:
         using ComputePipelineBase::ComputePipelineBase;
-        MaybeError Initialize(const ComputePipelineDescriptor* descriptor);
+        MaybeError Initialize(const ComputePipelineDescriptor* descriptor) override;
 
         NSPRef<id<MTLComputePipelineState>> mMtlComputePipelineState;
         MTLSize mLocalWorkgroupSize;

src/dawn_native/vulkan/ComputePipelineVk.h

@@ -35,7 +35,7 @@ namespace dawn_native { namespace vulkan {
       private:
         ~ComputePipeline() override;
         using ComputePipelineBase::ComputePipelineBase;
-        MaybeError Initialize(const ComputePipelineDescriptor* descriptor);
+        MaybeError Initialize(const ComputePipelineDescriptor* descriptor) override;
 
         VkPipeline mHandle = VK_NULL_HANDLE;
     };

src/tests/unittests/AsyncTaskTests.cpp

@@ -67,7 +67,7 @@ TEST_F(AsyncTaskTest, Basic) {
     dawn_platform::Platform platform;
     std::unique_ptr<dawn_platform::WorkerTaskPool> pool = platform.CreateWorkerTaskPool();
 
-    dawn_native::AsnycTaskManager taskManager(pool.get());
+    dawn_native::AsyncTaskManager taskManager(pool.get());
     ConcurrentTaskResultQueue taskResultQueue;
 
     constexpr size_t kTaskCount = 4u;