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
|
// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/gpu/command_buffer_helper.h"
#include <utility>
#include <vector>
#include "base/logging.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "base/threading/thread_checker.h"
#include "build/build_config.h"
#include "gpu/command_buffer/common/scheduling_priority.h"
#include "gpu/command_buffer/service/scheduler.h"
#include "gpu/command_buffer/service/sync_point_manager.h"
#include "gpu/ipc/service/command_buffer_stub.h"
#include "gpu/ipc/service/gpu_channel.h"
#include "gpu/ipc/service/gpu_channel_manager.h"
namespace media {
class CommandBufferHelperImpl
: public CommandBufferHelper,
public gpu::CommandBufferStub::DestructionObserver {
public:
explicit CommandBufferHelperImpl(gpu::CommandBufferStub* stub)
: CommandBufferHelper(stub->channel()->task_runner()),
stub_(stub),
memory_type_tracker_(
stub_->channel()->shared_image_stub()->memory_tracker()) {
DVLOG(1) << __func__;
DCHECK(stub_->channel()->task_runner()->BelongsToCurrentThread());
stub_->AddDestructionObserver(this);
wait_sequence_id_ = stub_->channel()->scheduler()->CreateSequence(
gpu::SchedulingPriority::kNormal, stub_->channel()->task_runner());
}
CommandBufferHelperImpl(const CommandBufferHelperImpl&) = delete;
CommandBufferHelperImpl& operator=(const CommandBufferHelperImpl&) = delete;
void WaitForSyncToken(gpu::SyncToken sync_token,
base::OnceClosure done_cb) override {
DVLOG(2) << __func__;
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
if (!stub_) {
return;
}
// TODO(sandersd): Do we need to keep a ref to |this| while there are
// pending waits? If we destruct while they are pending, they will never
// run.
stub_->channel()->scheduler()->ScheduleTask(
gpu::Scheduler::Task(wait_sequence_id_, std::move(done_cb),
std::vector<gpu::SyncToken>({sync_token})));
}
// Const variant of GetSharedImageStub() for internal callers.
gpu::SharedImageStub* shared_image_stub() const {
if (!stub_) {
return nullptr;
}
return stub_->channel()->shared_image_stub();
}
gpu::MemoryTracker* shared_image_stub_memory_tracker() const {
if (!stub_) {
return nullptr;
}
return stub_->channel()->shared_image_stub()->memory_tracker();
}
#if !BUILDFLAG(IS_ANDROID)
gpu::SharedImageStub* GetSharedImageStub() override {
return shared_image_stub();
}
gpu::MemoryTypeTracker* GetMemoryTypeTracker() override {
return &memory_type_tracker_;
}
#endif
gpu::SharedImageManager* GetSharedImageManager() override {
if (!stub_) {
return nullptr;
}
return stub_->channel()->gpu_channel_manager()->shared_image_manager();
}
private:
~CommandBufferHelperImpl() override {
DVLOG(1) << __func__;
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
if (stub_) {
DestroyStub();
}
}
void OnWillDestroyStub(bool have_context) override {
DVLOG(1) << __func__;
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
if (stub_) {
DestroyStub();
}
}
void DestroyStub() {
DVLOG(3) << __func__;
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
// If the last reference to |this| is in a |done_cb|, destroying the wait
// sequence can delete |this|. Clearing |stub_| first prevents DestroyStub()
// being called twice.
gpu::CommandBufferStub* stub = stub_;
stub_ = nullptr;
stub->RemoveDestructionObserver(this);
stub->channel()->scheduler()->DestroySequence(wait_sequence_id_);
}
raw_ptr<gpu::CommandBufferStub> stub_;
// Wait tasks are scheduled on our own sequence so that we can't inadvertently
// block the command buffer.
gpu::SequenceId wait_sequence_id_;
// MemoryTypeTracker's memory_tracker is a scoped_refptr. Therefore, invoking
// memory_tracker->TrackMemoryAllocatedChange() is safe even if the underlying
// stub and channel are destroyed before the CommandBufferHelper and its
// clients.
gpu::MemoryTypeTracker memory_type_tracker_;
THREAD_CHECKER(thread_checker_);
};
CommandBufferHelper::CommandBufferHelper(
scoped_refptr<base::SequencedTaskRunner> task_runner)
: base::RefCountedDeleteOnSequence<CommandBufferHelper>(
std::move(task_runner)) {}
// static
scoped_refptr<CommandBufferHelper> CommandBufferHelper::Create(
gpu::CommandBufferStub* stub) {
return base::MakeRefCounted<CommandBufferHelperImpl>(stub);
}
} // namespace media
|
