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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
using Silk.NET.Vulkan;
using System;
using System.Threading;
namespace Ryujinx.Graphics.Vulkan
{
class FenceHolder : IDisposable
{
private readonly Vk _api;
private readonly Device _device;
private Fence _fence;
private int _referenceCount;
private int _lock;
private readonly bool _concurrentWaitUnsupported;
private bool _disposed;
public unsafe FenceHolder(Vk api, Device device, bool concurrentWaitUnsupported)
{
_api = api;
_device = device;
_concurrentWaitUnsupported = concurrentWaitUnsupported;
var fenceCreateInfo = new FenceCreateInfo
{
SType = StructureType.FenceCreateInfo,
};
api.CreateFence(device, in fenceCreateInfo, null, out _fence).ThrowOnError();
_referenceCount = 1;
}
public Fence GetUnsafe()
{
return _fence;
}
public bool TryGet(out Fence fence)
{
int lastValue;
do
{
lastValue = _referenceCount;
if (lastValue == 0)
{
fence = default;
return false;
}
}
while (Interlocked.CompareExchange(ref _referenceCount, lastValue + 1, lastValue) != lastValue);
if (_concurrentWaitUnsupported)
{
AcquireLock();
}
fence = _fence;
return true;
}
public Fence Get()
{
Interlocked.Increment(ref _referenceCount);
return _fence;
}
public void PutLock()
{
Put();
if (_concurrentWaitUnsupported)
{
ReleaseLock();
}
}
public void Put()
{
if (Interlocked.Decrement(ref _referenceCount) == 0)
{
_api.DestroyFence(_device, _fence, Span<AllocationCallbacks>.Empty);
_fence = default;
}
}
private void AcquireLock()
{
while (!TryAcquireLock())
{
Thread.SpinWait(32);
}
}
private bool TryAcquireLock()
{
return Interlocked.Exchange(ref _lock, 1) == 0;
}
private void ReleaseLock()
{
Interlocked.Exchange(ref _lock, 0);
}
public void Wait()
{
if (_concurrentWaitUnsupported)
{
AcquireLock();
try
{
FenceHelper.WaitAllIndefinitely(_api, _device, stackalloc Fence[] { _fence });
}
finally
{
ReleaseLock();
}
}
else
{
FenceHelper.WaitAllIndefinitely(_api, _device, stackalloc Fence[] { _fence });
}
}
public bool IsSignaled()
{
if (_concurrentWaitUnsupported)
{
if (!TryAcquireLock())
{
return false;
}
try
{
return FenceHelper.AllSignaled(_api, _device, stackalloc Fence[] { _fence });
}
finally
{
ReleaseLock();
}
}
else
{
return FenceHelper.AllSignaled(_api, _device, stackalloc Fence[] { _fence });
}
}
public void Dispose()
{
if (!_disposed)
{
Put();
_disposed = true;
}
}
}
}
|
