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 {

// ExternalSemaphoreHandle
#if DAWN_PLATFORM_IS(WINDOWS)
using ExternalSemaphoreHandle = HANDLE;
const ExternalSemaphoreHandle kNullExternalSemaphoreHandle = nullptr;
#elif DAWN_PLATFORM_IS(FUCHSIA)
using ExternalSemaphoreHandle = zx_handle_t;
const ExternalSemaphoreHandle kNullExternalSemaphoreHandle = ZX_HANDLE_INVALID;
#elif DAWN_PLATFORM_IS(POSIX)
using ExternalSemaphoreHandle = int;
const ExternalSemaphoreHandle kNullExternalSemaphoreHandle = -1;
#else
#error "Platform not supported."
#endif

// ExternalMemoryHandle
#if DAWN_PLATFORM_IS(ANDROID)
using ExternalMemoryHandle = struct AHardwareBuffer*;
#elif DAWN_PLATFORM_IS(LINUX)
using ExternalMemoryHandle = int;
#elif DAWN_PLATFORM_IS(FUCHSIA)
// Really a Zircon vmo handle.
using ExternalMemoryHandle = zx_handle_t;
#else
// Generic types so that the rest of the Vulkan backend compiles.
using ExternalMemoryHandle = void*;
#endif

}  // namespace dawn::native::vulkan

#endif  // SRC_DAWN_NATIVE_VULKAN_EXTERNALHANDLE_H_