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// Copyright 2021 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef SRC_DAWN_NATIVE_CALLBACKTASKMANAGER_H_
#define SRC_DAWN_NATIVE_CALLBACKTASKMANAGER_H_
#include <functional>
#include <memory>
#include <mutex>
#include <vector>
#include "dawn/common/MutexProtected.h"
#include "dawn/common/RefCounted.h"
#include "dawn/common/TypeTraits.h"
namespace dawn::native {
enum class CallbackState {
Normal,
ShutDown,
DeviceLoss,
};
struct CallbackTask {
public:
virtual ~CallbackTask() = default;
void Execute();
void OnShutDown();
void OnDeviceLoss();
protected:
virtual void FinishImpl() = 0;
virtual void HandleShutDownImpl() = 0;
virtual void HandleDeviceLossImpl() = 0;
private:
CallbackState mState = CallbackState::Normal;
};
class CallbackTaskManager : public RefCounted {
public:
CallbackTaskManager();
~CallbackTaskManager() override;
void AddCallbackTask(std::unique_ptr<CallbackTask> callbackTask);
void AddCallbackTask(std::function<void()> callback);
template <typename... Args>
void AddCallbackTask(void (*callback)(Args... args), Args... args) {
static_assert((!IsCString<Args>::value && ...), "passing C string argument is not allowed");
AddCallbackTask([=] { callback(args...); });
}
bool IsEmpty();
void HandleDeviceLoss();
void HandleShutDown();
void Flush();
private:
struct StateAndQueue {
CallbackState mState = CallbackState::Normal;
std::vector<std::unique_ptr<CallbackTask>> mTaskQueue;
};
MutexProtected<StateAndQueue> mStateAndQueue;
};
} // namespace dawn::native
#endif // SRC_DAWN_NATIVE_CALLBACKTASKMANAGER_H_