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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GL_GPU_FENCE_H_
#define UI_GL_GPU_FENCE_H_
#include "base/macros.h"
#include "build/build_config.h"
#include "ui/gfx/gfx_export.h"
#include "ui/gfx/gpu_fence_handle.h"
extern "C" typedef struct _ClientGpuFence* ClientGpuFence;
namespace base {
class TimeTicks;
} // namespace base
namespace gfx {
// GpuFence objects own a GpuFenceHandle and release the resources in it when
// going out of scope as appropriate.
class GFX_EXPORT GpuFence {
public:
// Constructor takes ownership of the source handle's resources.
explicit GpuFence(GpuFenceHandle handle);
GpuFence() = delete;
~GpuFence();
// Returns a const reference to the underlying GpuFenceHandle
// owned by GpuFence. If you'd like a duplicated handle for use
// with IPC, call the Clone method on the returned handle.
const GpuFenceHandle& GetGpuFenceHandle() const;
// Casts for use with the GLES interface.
ClientGpuFence AsClientGpuFence();
static GpuFence* FromClientGpuFence(ClientGpuFence gpu_fence);
// Wait for the GpuFence to become ready.
void Wait();
enum FenceStatus { kSignaled, kNotSignaled, kInvalid };
static FenceStatus GetStatusChangeTime(int fd, base::TimeTicks* time);
base::TimeTicks GetMaxTimestamp() const;
private:
gfx::GpuFenceHandle fence_handle_;
DISALLOW_COPY_AND_ASSIGN(GpuFence);
};
} // namespace gfx
#endif // UI_GL_GPU_FENCE_H_
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