1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_GPU_FENCE_HANDLE_H_
#define UI_GFX_GPU_FENCE_HANDLE_H_
#include "base/component_export.h"
#include "base/memory/ref_counted.h"
#include "build/build_config.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 gfx {
// TODO(crbug.com/40728014): Make this a class instead of struct.
struct COMPONENT_EXPORT(GFX) GpuFenceHandle {
#if BUILDFLAG(IS_POSIX)
using ScopedPlatformFence = base::ScopedFD;
#elif BUILDFLAG(IS_FUCHSIA)
using ScopedPlatformFence = zx::event;
#elif BUILDFLAG(IS_WIN)
using ScopedPlatformFence = base::win::ScopedHandle;
#endif
GpuFenceHandle(const GpuFenceHandle&) = delete;
GpuFenceHandle& operator=(const GpuFenceHandle&) = delete;
GpuFenceHandle();
GpuFenceHandle(GpuFenceHandle&& other);
GpuFenceHandle& operator=(GpuFenceHandle&& other);
~GpuFenceHandle();
bool is_null() const;
// Returns an instance of |handle| which can be sent over IPC. This duplicates
// the handle so that IPC code can take ownership of it without invalidating
// |handle| itself.
GpuFenceHandle Clone() const;
// Takes ownership of 'scoped_fence'. This likely comes from a move
// operation.
void Adopt(ScopedPlatformFence scoped_fence);
// Internally clears out 'owned_fence' ownership.
void Reset();
// Returns a owned fence object (in scope) and 'Reset's the handle's fence
// object.
ScopedPlatformFence Release();
// Helper functions for platforms with unscoped underlying fence
// representations.
#if BUILDFLAG(IS_POSIX)
// Returns fd but the returned fd is not owned.
int Peek() const;
#elif BUILDFLAG(IS_WIN)
// Returns HANDLE but the returned HANDLE is not owned.
HANDLE Peek() const;
#endif
// Returns global total number of clones since last call.
static uint32_t GetAndClearNumberOfClones();
private:
struct RefCountedScopedFence
: public base::RefCountedThreadSafe<RefCountedScopedFence> {
explicit RefCountedScopedFence(ScopedPlatformFence scoped_fd);
private:
~RefCountedScopedFence();
friend class base::RefCountedThreadSafe<RefCountedScopedFence>;
friend struct GpuFenceHandle;
ScopedPlatformFence scoped_fence_;
};
scoped_refptr<RefCountedScopedFence> smart_fence_;
};
} // namespace gfx
#endif // UI_GFX_GPU_FENCE_HANDLE_H_
|
