blob: 31d149d629fdfac6cd47e657ebe5aae4d7a4a0db (
plain)
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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
#include "precompiled.h"
//
// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Fence.cpp: Implements the gl::Fence class, which supports the GL_NV_fence extension.
// Important note on accurate timers in Windows:
//
// QueryPerformanceCounter has a few major issues, including being 10x as expensive to call
// as timeGetTime on laptops and "jumping" during certain hardware events.
//
// See the comments at the top of the Chromium source file "chromium/src/base/time/time_win.cc"
// https://code.google.com/p/chromium/codesearch#chromium/src/base/time/time_win.cc
//
// We still opt to use QPC. In the present and moving forward, most newer systems will not suffer
// from buggy implementations.
#include "libGLESv2/Fence.h"
#include "libGLESv2/renderer/FenceImpl.h"
#include "libGLESv2/renderer/Renderer.h"
#include "libGLESv2/main.h"
namespace gl
{
FenceNV::FenceNV(rx::Renderer *renderer)
{
mFence = renderer->createFence();
}
FenceNV::~FenceNV()
{
delete mFence;
}
GLboolean FenceNV::isFence() const
{
// GL_NV_fence spec:
// A name returned by GenFencesNV, but not yet set via SetFenceNV, is not the name of an existing fence.
return (mFence->isSet() ? GL_TRUE : GL_FALSE);
}
void FenceNV::setFence(GLenum condition)
{
mFence->set();
mCondition = condition;
mStatus = GL_FALSE;
}
GLboolean FenceNV::testFence()
{
// Flush the command buffer by default
bool result = mFence->test(true);
mStatus = (result ? GL_TRUE : GL_FALSE);
return mStatus;
}
void FenceNV::finishFence()
{
ASSERT(mFence->isSet());
while (!mFence->test(true))
{
Sleep(0);
}
}
GLint FenceNV::getFencei(GLenum pname)
{
ASSERT(mFence->isSet());
switch (pname)
{
case GL_FENCE_STATUS_NV:
{
// GL_NV_fence spec:
// Once the status of a fence has been finished (via FinishFenceNV) or tested and the returned status is TRUE (via either TestFenceNV
// or GetFenceivNV querying the FENCE_STATUS_NV), the status remains TRUE until the next SetFenceNV of the fence.
if (mStatus == GL_TRUE)
{
return GL_TRUE;
}
mStatus = (mFence->test(false) ? GL_TRUE : GL_FALSE);
return mStatus;
}
case GL_FENCE_CONDITION_NV:
return mCondition;
default: UNREACHABLE(); return 0;
}
}
FenceSync::FenceSync(rx::Renderer *renderer, GLuint id)
: RefCountObject(id)
{
mFence = renderer->createFence();
LARGE_INTEGER counterFreqency = { 0 };
BOOL success = QueryPerformanceFrequency(&counterFreqency);
UNUSED_ASSERTION_VARIABLE(success);
ASSERT(success);
mCounterFrequency = counterFreqency.QuadPart;
}
FenceSync::~FenceSync()
{
delete mFence;
}
void FenceSync::set(GLenum condition)
{
mCondition = condition;
mFence->set();
}
GLenum FenceSync::clientWait(GLbitfield flags, GLuint64 timeout)
{
ASSERT(mFence->isSet());
bool flushCommandBuffer = ((flags & GL_SYNC_FLUSH_COMMANDS_BIT) != 0);
if (mFence->test(flushCommandBuffer))
{
return GL_ALREADY_SIGNALED;
}
if (mFence->hasError())
{
return GL_WAIT_FAILED;
}
if (timeout == 0)
{
return GL_TIMEOUT_EXPIRED;
}
LARGE_INTEGER currentCounter = { 0 };
BOOL success = QueryPerformanceCounter(¤tCounter);
UNUSED_ASSERTION_VARIABLE(success);
ASSERT(success);
LONGLONG timeoutInSeconds = static_cast<LONGLONG>(timeout) * static_cast<LONGLONG>(1000000ll);
LONGLONG endCounter = currentCounter.QuadPart + mCounterFrequency * timeoutInSeconds;
while (currentCounter.QuadPart < endCounter && !mFence->test(flushCommandBuffer))
{
Sleep(0);
BOOL success = QueryPerformanceCounter(¤tCounter);
UNUSED_ASSERTION_VARIABLE(success);
ASSERT(success);
}
if (mFence->hasError())
{
return GL_WAIT_FAILED;
}
if (currentCounter.QuadPart >= endCounter)
{
return GL_TIMEOUT_EXPIRED;
}
return GL_CONDITION_SATISFIED;
}
void FenceSync::serverWait()
{
// Because our API is currently designed to be called from a single thread, we don't need to do
// extra work for a server-side fence. GPU commands issued after the fence is created will always
// be processed after the fence is signaled.
}
GLenum FenceSync::getStatus() const
{
if (mFence->test(false))
{
// The spec does not specify any way to report errors during the status test (e.g. device lost)
// so we report the fence is unblocked in case of error or signaled.
return GL_SIGNALED;
}
return GL_UNSIGNALED;
}
}
|
