// Copyright 2017 The Dawn & Tint Authors
//
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// 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.
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// 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.
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// 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"
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#include "src/dawn/native/vulkan/FencedDeleter.h"

#include <algorithm>

#include "src/dawn/native/IntegerTypes.h"
#include "src/dawn/native/Queue.h"
#include "src/dawn/native/vulkan/DeviceVk.h"

namespace dawn::native::vulkan {

FencedDeleter::FencedDeleter(Device* device) : mDevice(device) {}

FencedDeleter::~FencedDeleter() {
    // Flush any pending deletions.
    UpdateCompletedSerialTo(kMaxExecutionSerial);
}

#define X(Type, DeleteFn, deleteWith)                                            \
    void FencedDeleter::DeleteWhenUnused(Type handle) {                          \
        mPendingDeletions.Use([&](auto pending) {                                \
            if (pending->mAssumeCompleted) {                                     \
                [[maybe_unused]] VkDevice device = mDevice->GetVkDevice();       \
                [[maybe_unused]] VkInstance instance = mDevice->GetVkInstance(); \
                mDevice->fn.DeleteFn(deleteWith, handle, nullptr);               \
                return;                                                          \
            }                                                                    \
            ExecutionSerial deletionSerial = GetCurrentDeletionSerial();         \
            pending->m##Type.Enqueue(handle, deletionSerial);                    \
        });                                                                      \
    }
FENCED_DELETER_TYPES(X)
#undef X

ExecutionSerial FencedDeleter::GetLastPendingDeletionSerial() {
    ExecutionSerial lastSerial = kBeginningOfGPUTime;
    mPendingDeletions.Use([&](auto pending) {
#define X(Type, ...)                                                      \
    if (!pending->m##Type.Empty()) {                                      \
        lastSerial = std::max(lastSerial, pending->m##Type.LastSerial()); \
    }
        FENCED_DELETER_TYPES(X)
#undef X
    });
    return lastSerial;
}

ExecutionSerial FencedDeleter::GetCurrentDeletionSerial() {
    return mDevice->GetQueue()->GetPendingCommandSerial();
}

void FencedDeleter::UpdateCompletedSerialTo(ExecutionSerial completedSerial) {
    VkDevice device = mDevice->GetVkDevice();
    VkInstance instance = mDevice->GetVkInstance();

    mPendingDeletions.Use([&](auto pending) {
#define X(Type, DeleteFn, deleteWith)                                   \
    for (Type handle : pending->m##Type.IterateUpTo(completedSerial)) { \
        mDevice->fn.DeleteFn(deleteWith, handle, nullptr);              \
    }                                                                   \
    pending->m##Type.ClearUpTo(completedSerial);
        FENCED_DELETER_TYPES(X)
#undef X
    });
}

void FencedDeleter::AssumeCommandsComplete() {
    mPendingDeletions->mAssumeCompleted = true;
}

}  // namespace dawn::native::vulkan
