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
|
/*
* Copyright (C) 2020 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 "ProtectCallback.h"
#include <android-base/logging.h>
#include <android-base/scopeguard.h>
#include <android-base/thread_annotations.h>
#include <android/hidl/base/1.0/IBase.h>
#include <hidl/HidlSupport.h>
#include <nnapi/Result.h>
#include "HandleError.h"
#include <algorithm>
#include <functional>
#include <mutex>
#include <vector>
namespace android::hardware::neuralnetworks::utils {
void DeathRecipient::serviceDied(uint64_t /*cookie*/, const wp<hidl::base::V1_0::IBase>& /*who*/) {
std::lock_guard guard(mMutex);
std::for_each(mObjects.begin(), mObjects.end(),
[](IProtectedCallback* killable) { killable->notifyAsDeadObject(); });
mObjects.clear();
mIsDeadObject = true;
}
void DeathRecipient::add(IProtectedCallback* killable) const {
CHECK(killable != nullptr);
std::lock_guard guard(mMutex);
if (mIsDeadObject) {
killable->notifyAsDeadObject();
} else {
mObjects.push_back(killable);
}
}
void DeathRecipient::remove(IProtectedCallback* killable) const {
CHECK(killable != nullptr);
std::lock_guard guard(mMutex);
const auto newEnd = std::remove(mObjects.begin(), mObjects.end(), killable);
mObjects.erase(newEnd, mObjects.end());
}
nn::GeneralResult<DeathHandler> DeathHandler::create(sp<hidl::base::V1_0::IBase> object) {
if (object == nullptr) {
return NN_ERROR(nn::ErrorStatus::INVALID_ARGUMENT)
<< "utils::DeathHandler::create must have non-null object";
}
auto deathRecipient = sp<DeathRecipient>::make();
const auto ret = object->linkToDeath(deathRecipient, /*cookie=*/0);
const bool success = HANDLE_TRANSPORT_FAILURE(ret);
if (!success) {
return NN_ERROR(nn::ErrorStatus::GENERAL_FAILURE) << "IBase::linkToDeath returned false";
}
return DeathHandler(std::move(object), std::move(deathRecipient));
}
DeathHandler::DeathHandler(sp<hidl::base::V1_0::IBase> object, sp<DeathRecipient> deathRecipient)
: mObject(std::move(object)), mDeathRecipient(std::move(deathRecipient)) {
CHECK(mObject != nullptr);
CHECK(mDeathRecipient != nullptr);
}
DeathHandler::~DeathHandler() {
if (mObject != nullptr && mDeathRecipient != nullptr) {
const auto successful = mObject->unlinkToDeath(mDeathRecipient).isOk();
if (!successful) {
LOG(ERROR) << "IBase::linkToDeath failed";
}
}
}
[[nodiscard]] base::ScopeGuard<DeathHandler::Cleanup> DeathHandler::protectCallback(
IProtectedCallback* killable) const {
CHECK(killable != nullptr);
mDeathRecipient->add(killable);
return base::make_scope_guard(
[deathRecipient = mDeathRecipient, killable] { deathRecipient->remove(killable); });
}
void DeathHandler::protectCallbackForLifetimeOfDeathHandler(IProtectedCallback* killable) const {
CHECK(killable != nullptr);
mDeathRecipient->add(killable);
}
} // namespace android::hardware::neuralnetworks::utils
|
