src/dawn/native/vulkan/ExternalHandle.h

// Copyright 2022 The Dawn & Tint Authors
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#ifndef SRC_DAWN_NATIVE_VULKAN_EXTERNALHANDLE_H_
#define SRC_DAWN_NATIVE_VULKAN_EXTERNALHANDLE_H_

#include "dawn/common/vulkan_platform.h"

namespace dawn::native::vulkan {

#if DAWN_PLATFORM_IS(ANDROID)
// AHardwareBuffer
using ExternalMemoryHandle = struct AHardwareBuffer*;
// File descriptor
using ExternalSemaphoreHandle = int;
const ExternalSemaphoreHandle kNullExternalSemaphoreHandle = -1;
#elif DAWN_PLATFORM_IS(LINUX)
// File descriptor
using ExternalMemoryHandle = int;
// File descriptor
using ExternalSemaphoreHandle = int;
const ExternalSemaphoreHandle kNullExternalSemaphoreHandle = -1;
#elif DAWN_PLATFORM_IS(FUCHSIA)
// Really a Zircon vmo handle.
using ExternalMemoryHandle = zx_handle_t;
// Really a Zircon event handle.
using ExternalSemaphoreHandle = zx_handle_t;
const ExternalSemaphoreHandle kNullExternalSemaphoreHandle = ZX_HANDLE_INVALID;
#else
// Generic types so that the Null service can compile, not used for real handles
using ExternalMemoryHandle = void*;
using ExternalSemaphoreHandle = void*;
const ExternalSemaphoreHandle kNullExternalSemaphoreHandle = nullptr;
#endif

}  // namespace dawn::native::vulkan

#endif  // SRC_DAWN_NATIVE_VULKAN_EXTERNALHANDLE_H_