blob: 3b838d801946fcc29f41c9b2b4318eb492e1da2e (
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
|
/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Callbacks.h"
#include <android-base/logging.h>
namespace android {
namespace hardware {
namespace neuralnetworks {
namespace V1_0 {
namespace implementation {
CallbackBase::CallbackBase() : mNotified(false) {}
CallbackBase::~CallbackBase() {
// Note that we cannot call CallbackBase::join_thread from here:
// CallbackBase is intended to be reference counted, and it is possible that
// the reference count drops to zero in the bound thread, causing the
// bound thread to call this destructor. If a thread tries to join
// itself, it throws an exception, producing a message like the
// following:
//
// terminating with uncaught exception of type std::__1::system_error:
// thread::join failed: Resource deadlock would occur
}
void CallbackBase::wait() {
std::unique_lock<std::mutex> lock(mMutex);
mCondition.wait(lock, [this]{return mNotified;});
join_thread_locked();
}
bool CallbackBase::on_finish(std::function<bool(void)> post_work) {
std::lock_guard<std::mutex> lock(mMutex);
if (mPostWork != nullptr) {
LOG(ERROR) << "CallbackBase::on_finish -- a post-work function has already been bound to "
"this callback object";
return false;
}
if (post_work == nullptr) {
LOG(ERROR) << "CallbackBase::on_finish -- the new post-work function is invalid";
return false;
}
mPostWork = std::move(post_work);
return true;
}
bool CallbackBase::bind_thread(std::thread&& asyncThread) {
std::lock_guard<std::mutex> lock(mMutex);
if (mThread.joinable()) {
LOG(ERROR) << "CallbackBase::bind_thread -- a thread has already been bound to this "
"callback object";
return false;
}
if (!asyncThread.joinable()) {
LOG(ERROR) << "CallbackBase::bind_thread -- the new thread is not joinable";
return false;
}
mThread = std::move(asyncThread);
return true;
}
void CallbackBase::join_thread() {
std::lock_guard<std::mutex> lock(mMutex);
join_thread_locked();
}
void CallbackBase::notify() {
{
std::lock_guard<std::mutex> lock(mMutex);
mNotified = true;
if (mPostWork != nullptr) {
bool success = mPostWork();
if (!success) {
LOG(ERROR) << "CallbackBase::notify -- post work failed";
}
}
}
mCondition.notify_all();
}
void CallbackBase::join_thread_locked() {
if (mThread.joinable()) {
mThread.join();
}
}
PreparedModelCallback::PreparedModelCallback() :
mErrorStatus(ErrorStatus::GENERAL_FAILURE), mPreparedModel(nullptr) {}
PreparedModelCallback::~PreparedModelCallback() {}
Return<void> PreparedModelCallback::notify(ErrorStatus errorStatus,
const sp<IPreparedModel>& preparedModel) {
mErrorStatus = errorStatus;
mPreparedModel = preparedModel;
CallbackBase::notify();
return Void();
}
ErrorStatus PreparedModelCallback::getStatus() {
wait();
return mErrorStatus;
}
sp<IPreparedModel> PreparedModelCallback::getPreparedModel() {
wait();
return mPreparedModel;
}
ExecutionCallback::ExecutionCallback() : mErrorStatus(ErrorStatus::GENERAL_FAILURE) {}
ExecutionCallback::~ExecutionCallback() {}
Return<void> ExecutionCallback::notify(ErrorStatus errorStatus) {
mErrorStatus = errorStatus;
CallbackBase::notify();
return Void();
}
ErrorStatus ExecutionCallback::getStatus() {
wait();
return mErrorStatus;
}
} // namespace implementation
} // namespace V1_0
} // namespace neuralnetworks
} // namespace hardware
} // namespace android
|
