// Copyright 2020 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
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "src/dawn/native/vulkan/QuerySetVk.h"

#include <algorithm>
#include <vector>

#include "dawn/platform/DawnPlatform.h"
#include "src/dawn/native/vulkan/DeviceVk.h"
#include "src/dawn/native/vulkan/FencedDeleter.h"
#include "src/dawn/native/vulkan/UtilsVulkan.h"
#include "src/dawn/native/vulkan/VulkanError.h"

namespace dawn::native::vulkan {

namespace {
VkQueryType VulkanQueryType(wgpu::QueryType type) {
    switch (type) {
        case wgpu::QueryType::Occlusion:
            return VK_QUERY_TYPE_OCCLUSION;
        case wgpu::QueryType::Timestamp:
            return VK_QUERY_TYPE_TIMESTAMP;
    }
    DAWN_UNREACHABLE();
}
}  // anonymous namespace

// static
ResultOrError<Ref<QuerySet>> QuerySet::Create(Device* device,
                                              const QuerySetDescriptor* descriptor) {
    Ref<QuerySet> queryset = AcquireRef(new QuerySet(device, descriptor));
    DAWN_TRY(queryset->Initialize());
    return queryset;
}

MaybeError QuerySet::Initialize() {
    VkQueryPoolCreateInfo createInfo;
    createInfo.sType = VK_STRUCTURE_TYPE_QUERY_POOL_CREATE_INFO;
    createInfo.pNext = nullptr;
    createInfo.flags = 0;
    createInfo.queryType = VulkanQueryType(GetQueryType());
    createInfo.queryCount = std::max(uint32_t{GetQueryCount()}, 1u);

    Device* device = ToBackend(GetDevice());
    DAWN_TRY(CheckVkOOMThenSuccess(
        device->fn.CreateQueryPool(device->GetVkDevice(), &createInfo, nullptr, &*mHandle),
        "vkCreateQueryPool"));

    SetLabelImpl();

    return {};
}

VkQueryPool QuerySet::GetHandle() const {
    return mHandle;
}

QuerySet::~QuerySet() = default;

void QuerySet::DestroyImpl(DestroyReason reason) {
    // TODO(crbug.com/dawn/831): DestroyImpl is called from two places.
    // - It may be called if the query set is explicitly destroyed with APIDestroy.
    //   This case is NOT thread-safe and needs proper synchronization with other
    //   simultaneous uses of the query set.
    // - It may be called when the last ref to the query set is dropped and it
    //   is implicitly destroyed. This case is thread-safe because there are no
    //   other threads using the query set since there are no other live refs.
    QuerySetBase::DestroyImpl(reason);
    if (mHandle != VK_NULL_HANDLE) {
        ToBackend(GetDevice())->GetFencedDeleter()->DeleteWhenUnused(mHandle);
        mHandle = VK_NULL_HANDLE;
    }
}

void QuerySet::SetLabelImpl() {
    SetDebugName(ToBackend(GetDevice()), mHandle, "Dawn_QuerySet", GetLabel());
}

}  // namespace dawn::native::vulkan