src/dawn/native/metal/SharedFenceMTL.mm

// Copyright 2023 The Dawn & Tint Authors
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#include "dawn/native/metal/SharedFenceMTL.h"

#include "dawn/native/ChainUtils.h"
#include "dawn/native/metal/DeviceMTL.h"

namespace dawn::native::metal {

// static
ResultOrError<Ref<SharedFence>> SharedFence::Create(
    Device* device,
    const char* label,
    const SharedFenceMTLSharedEventDescriptor* descriptor) {
    DAWN_INVALID_IF(descriptor->sharedEvent == nullptr, "MTLSharedEvent is missing.");
    if (@available(macOS 10.14, iOS 12.0, *)) {
        return AcquireRef(new SharedFence(
            device, label, static_cast<id<MTLSharedEvent>>(descriptor->sharedEvent)));
    } else {
        return DAWN_INTERNAL_ERROR("MTLSharedEvent not supported.");
    }
}

SharedFence::SharedFence(Device* device, const char* label, id<MTLSharedEvent> sharedEvent)
    : SharedFenceBase(device, label), mSharedEvent(sharedEvent) {}

id<MTLSharedEvent> SharedFence::GetMTLSharedEvent() const {
    return mSharedEvent.Get();
}

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

    DAWN_TRY(info.ValidateSubset<SharedFenceMTLSharedEventExportInfo>());
    auto* exportInfo = info.Get<SharedFenceMTLSharedEventExportInfo>();
    if (exportInfo != nullptr) {
        exportInfo->sharedEvent = mSharedEvent.Get();
    }
    return {};
}

}  // namespace dawn::native::metal