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
194
195
196
197
198
199
200
201
202
203
204
205
|
// Copyright (c) 2012 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.
#include "gpu/command_buffer/service/command_buffer_service.h"
#include <limits>
#include "base/logging.h"
#include "base/debug/trace_event.h"
#include "gpu/command_buffer/common/cmd_buffer_common.h"
#include "gpu/command_buffer/common/command_buffer_shared.h"
#include "gpu/command_buffer/service/transfer_buffer_manager.h"
using ::base::SharedMemory;
namespace gpu {
CommandBufferService::CommandBufferService(
TransferBufferManagerInterface* transfer_buffer_manager)
: ring_buffer_id_(-1),
shared_state_(NULL),
num_entries_(0),
get_offset_(0),
put_offset_(0),
transfer_buffer_manager_(transfer_buffer_manager),
token_(0),
generation_(0),
error_(error::kNoError),
context_lost_reason_(error::kUnknown) {
}
CommandBufferService::~CommandBufferService() {
}
bool CommandBufferService::Initialize() {
return true;
}
CommandBufferService::State CommandBufferService::GetState() {
State state;
state.num_entries = num_entries_;
state.get_offset = get_offset_;
state.put_offset = put_offset_;
state.token = token_;
state.error = error_;
state.context_lost_reason = context_lost_reason_;
state.generation = ++generation_;
return state;
}
CommandBufferService::State CommandBufferService::GetLastState() {
return GetState();
}
int32 CommandBufferService::GetLastToken() {
return GetState().token;
}
void CommandBufferService::UpdateState() {
if (shared_state_) {
CommandBufferService::State state = GetState();
shared_state_->Write(state);
}
}
CommandBufferService::State CommandBufferService::FlushSync(
int32 put_offset, int32 last_known_get) {
if (put_offset < 0 || put_offset > num_entries_) {
error_ = gpu::error::kOutOfBounds;
return GetState();
}
put_offset_ = put_offset;
if (!put_offset_change_callback_.is_null())
put_offset_change_callback_.Run();
return GetState();
}
void CommandBufferService::Flush(int32 put_offset) {
if (put_offset < 0 || put_offset > num_entries_) {
error_ = gpu::error::kOutOfBounds;
return;
}
put_offset_ = put_offset;
if (!put_offset_change_callback_.is_null())
put_offset_change_callback_.Run();
}
void CommandBufferService::SetGetBuffer(int32 transfer_buffer_id) {
DCHECK_EQ(-1, ring_buffer_id_);
DCHECK_EQ(put_offset_, get_offset_); // Only if it's empty.
ring_buffer_ = GetTransferBuffer(transfer_buffer_id);
DCHECK(ring_buffer_.ptr);
ring_buffer_id_ = transfer_buffer_id;
num_entries_ = ring_buffer_.size / sizeof(CommandBufferEntry);
put_offset_ = 0;
SetGetOffset(0);
if (!get_buffer_change_callback_.is_null()) {
get_buffer_change_callback_.Run(ring_buffer_id_);
}
UpdateState();
}
bool CommandBufferService::SetSharedStateBuffer(
scoped_ptr<base::SharedMemory> shared_state_shm) {
shared_state_shm_.reset(shared_state_shm.release());
if (!shared_state_shm_->Map(sizeof(*shared_state_)))
return false;
shared_state_ =
static_cast<CommandBufferSharedState*>(shared_state_shm_->memory());
UpdateState();
return true;
}
void CommandBufferService::SetGetOffset(int32 get_offset) {
DCHECK(get_offset >= 0 && get_offset < num_entries_);
get_offset_ = get_offset;
}
Buffer CommandBufferService::CreateTransferBuffer(size_t size,
int32* id) {
*id = -1;
SharedMemory buffer;
if (!buffer.CreateAnonymous(size))
return Buffer();
static int32 next_id = 1;
*id = next_id++;
if (!RegisterTransferBuffer(*id, &buffer, size)) {
*id = -1;
return Buffer();
}
return GetTransferBuffer(*id);
}
void CommandBufferService::DestroyTransferBuffer(int32 id) {
transfer_buffer_manager_->DestroyTransferBuffer(id);
if (id == ring_buffer_id_) {
ring_buffer_id_ = -1;
ring_buffer_ = Buffer();
num_entries_ = 0;
get_offset_ = 0;
put_offset_ = 0;
}
}
Buffer CommandBufferService::GetTransferBuffer(int32 id) {
return transfer_buffer_manager_->GetTransferBuffer(id);
}
bool CommandBufferService::RegisterTransferBuffer(
int32 id,
base::SharedMemory* shared_memory,
size_t size) {
return transfer_buffer_manager_->RegisterTransferBuffer(id,
shared_memory,
size);
}
void CommandBufferService::SetToken(int32 token) {
token_ = token;
UpdateState();
}
void CommandBufferService::SetParseError(error::Error error) {
if (error_ == error::kNoError) {
error_ = error;
if (!parse_error_callback_.is_null())
parse_error_callback_.Run();
}
}
void CommandBufferService::SetContextLostReason(
error::ContextLostReason reason) {
context_lost_reason_ = reason;
}
void CommandBufferService::SetPutOffsetChangeCallback(
const base::Closure& callback) {
put_offset_change_callback_ = callback;
}
void CommandBufferService::SetGetBufferChangeCallback(
const GetBufferChangedCallback& callback) {
get_buffer_change_callback_ = callback;
}
void CommandBufferService::SetParseErrorCallback(
const base::Closure& callback) {
parse_error_callback_ = callback;
}
} // namespace gpu
|
