// Copyright 2023 The Dawn & Tint Authors
//
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// 1. Redistributions of source code must retain the above copyright notice, this
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//    this list of conditions and the following disclaimer in the documentation
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#include "src/dawn/native/vulkan/SharedFenceVk.h"

#include <utility>

#include "src/dawn/native/ChainUtils.h"
#include "src/dawn/native/vulkan/DeviceVk.h"
#include "src/dawn/native/vulkan/UtilsVulkan.h"
#include "src/dawn/utils/SystemHandle.h"

namespace dawn::native::vulkan {

// static
ResultOrError<Ref<SharedFence>> SharedFence::Create(
    Device* device,
    StringView label,
    const SharedFenceVkSemaphoreZirconHandleDescriptor* descriptor) {
    DAWN_INVALID_IF(descriptor->handle == 0, "Zircon handle (%d) was invalid.", descriptor->handle);

    dawn::utils::SystemHandle handle = dawn::utils::SystemHandle::Duplicate(descriptor->handle);
    auto fence = AcquireRef(new SharedFence(device, label, std::move(handle)));
    fence->mType = wgpu::SharedFenceType::VkSemaphoreZirconHandle;
    return fence;
}

// static
ResultOrError<Ref<SharedFence>> SharedFence::Create(Device* device,
                                                    StringView label,
                                                    const SharedFenceSyncFDDescriptor* descriptor) {
    DAWN_INVALID_IF(descriptor->handle < 0 && descriptor->handle != kSemaphoreFdAlreadySignaledFd,
                    "File descriptor (%d) was invalid.", descriptor->handle);
    utils::SystemHandle handle;
    if (descriptor->handle != kSemaphoreFdAlreadySignaledFd) {
        handle = utils::SystemHandle::Duplicate(descriptor->handle);
    }
    auto fence = AcquireRef(new SharedFence(device, label, std::move(handle)));
    fence->mType = wgpu::SharedFenceType::SyncFD;
    return fence;
}

// static
ResultOrError<Ref<SharedFence>> SharedFence::Create(
    Device* device,
    StringView label,
    const SharedFenceVkSemaphoreOpaqueFDDescriptor* descriptor) {
    DAWN_INVALID_IF(descriptor->handle < 0, "File descriptor (%d) was invalid.",
                    descriptor->handle);
    dawn::utils::SystemHandle handle = dawn::utils::SystemHandle::Duplicate(descriptor->handle);
    auto fence = AcquireRef(new SharedFence(device, label, std::move(handle)));
    fence->mType = wgpu::SharedFenceType::VkSemaphoreOpaqueFD;
    return fence;
}

SharedFence::SharedFence(Device* device, StringView label, dawn::utils::SystemHandle handle)
    : SharedFenceBase(device, label), mHandle(std::move(handle)) {}

void SharedFence::DestroyImpl(DestroyReason reason) {
    if (mHandle.IsValid()) {
        mHandle.Close();
    }
}

const dawn::utils::SystemHandle& SharedFence::GetHandle() const {
    return mHandle;
}

MaybeError SharedFence::ExportInfoImpl(UnpackedPtr<SharedFenceExportInfo>& info) const {
    info->type = mType;

#if DAWN_PLATFORM_IS(FUCHSIA)
    DAWN_TRY(info.ValidateSubset<SharedFenceVkSemaphoreZirconHandleExportInfo>());
    auto* exportInfo = info.Get<SharedFenceVkSemaphoreZirconHandleExportInfo>();
    if (exportInfo != nullptr) {
        exportInfo->handle = mHandle.Get();
    }
#elif DAWN_PLATFORM_IS(LINUX)
    switch (mType) {
        case wgpu::SharedFenceType::SyncFD:
            DAWN_TRY(info.ValidateSubset<SharedFenceSyncFDExportInfo>());
            {
                auto* exportInfo = info.Get<SharedFenceSyncFDExportInfo>();
                if (exportInfo != nullptr) {
                    exportInfo->handle = mHandle.Get();
                }
            }
            break;
        case wgpu::SharedFenceType::VkSemaphoreOpaqueFD:
            DAWN_TRY(info.ValidateSubset<SharedFenceVkSemaphoreOpaqueFDExportInfo>());
            {
                auto* exportInfo = info.Get<SharedFenceVkSemaphoreOpaqueFDExportInfo>();
                if (exportInfo != nullptr) {
                    exportInfo->handle = mHandle.Get();
                }
            }
            break;
        default:
            DAWN_UNREACHABLE();
    }
#else
    DAWN_UNREACHABLE();
#endif
    return {};
}

}  // namespace dawn::native::vulkan