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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_VULKAN_SEMAPHORE_HANDLE_H_
#define GPU_VULKAN_SEMAPHORE_HANDLE_H_
#include <vulkan/vulkan_core.h>
#include <utility>
#include "base/component_export.h"
#include "build/build_config.h"
#include "ui/gfx/gpu_fence_handle.h"
#if BUILDFLAG(IS_POSIX)
#include "base/files/scoped_file.h"
#endif
#if BUILDFLAG(IS_FUCHSIA)
#include <lib/zx/event.h>
#endif
#if BUILDFLAG(IS_WIN)
#include "base/win/scoped_handle.h"
#endif
namespace gpu {
// Thin wrapper around platform-specific handles for VkSemaphores.
// Note that handle transference depends on a handle type.
// SYNC_FD handles that use copy transference, while reference transference is
// used other handles types.
class COMPONENT_EXPORT(VULKAN) SemaphoreHandle {
public:
#if BUILDFLAG(IS_POSIX)
using PlatformHandle = base::ScopedFD;
#elif BUILDFLAG(IS_WIN)
using PlatformHandle = base::win::ScopedHandle;
#elif BUILDFLAG(IS_FUCHSIA)
using PlatformHandle = zx::event;
#endif
SemaphoreHandle();
SemaphoreHandle(VkExternalSemaphoreHandleTypeFlagBits type,
PlatformHandle handle);
explicit SemaphoreHandle(gfx::GpuFenceHandle fence);
SemaphoreHandle(SemaphoreHandle&&);
SemaphoreHandle(const SemaphoreHandle&) = delete;
SemaphoreHandle& operator=(const SemaphoreHandle&) = delete;
~SemaphoreHandle();
SemaphoreHandle& operator=(SemaphoreHandle&&);
VkExternalSemaphoreHandleTypeFlagBits vk_handle_type() { return type_; }
bool is_valid() const {
#if BUILDFLAG(IS_WIN)
return handle_.IsValid();
#else
return handle_.is_valid();
#endif
}
// Returns underlying platform-specific handle for the semaphore. is_valid()
// becomes false after this function returns.
PlatformHandle TakeHandle() { return std::move(handle_); }
// Moves platform specific instances to gfx::GpuFenceHandle.
gfx::GpuFenceHandle ToGpuFenceHandle() &&;
SemaphoreHandle Duplicate() const;
private:
void Init(VkExternalSemaphoreHandleTypeFlagBits type, PlatformHandle handle);
VkExternalSemaphoreHandleTypeFlagBits type_;
PlatformHandle handle_;
};
} // namespace gpu
#endif // GPU_VULKAN_SEMAPHORE_HANDLE_H_
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