1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "none_io_waiter.h"
17
18 #include <chrono>
19
20 #include "event_handler_utils.h"
21
22 DEFINE_HILOG_LABEL("NoneIoWaiter");
23
24 namespace OHOS {
25 namespace AppExecFwk {
26 namespace {
27 const int32_t HOURS_PER_DAY = 24;
28 const int32_t DAYS_PER_YEAR = 365;
29 const int32_t HOURS_PER_YEAR = HOURS_PER_DAY * DAYS_PER_YEAR;
30 } // unnamed namespace
31
32 // Nothing to do, but used to fix a codex warning.
~NoneIoWaiter()33 NoneIoWaiter::~NoneIoWaiter()
34 {}
35
WaitFor(std::unique_lock<std::mutex> & lock,int64_t nanoseconds)36 bool NoneIoWaiter::WaitFor(std::unique_lock<std::mutex> &lock, int64_t nanoseconds)
37 {
38 ++waitingCount_;
39 if (nanoseconds < 0) {
40 condition_.wait(lock);
41 } else {
42 /*
43 * Fix a problem in some versions of STL.
44 * Parameter 'nanoseconds' is too large to cause overflow by adding 'now'.
45 * So limit it to no more than one year.
46 */
47 static const auto oneYear = std::chrono::hours(HOURS_PER_YEAR);
48 auto duration = std::chrono::nanoseconds(nanoseconds);
49 (void)condition_.wait_for(lock, (duration > oneYear) ? oneYear : duration);
50 }
51 --waitingCount_;
52 return true;
53 }
54
NotifyOne()55 void NoneIoWaiter::NotifyOne()
56 {
57 if (waitingCount_ > 0) {
58 condition_.notify_one();
59 }
60 }
61
NotifyAll()62 void NoneIoWaiter::NotifyAll()
63 {
64 if (waitingCount_ > 0) {
65 condition_.notify_all();
66 }
67 }
68
SupportListeningFileDescriptor() const69 bool NoneIoWaiter::SupportListeningFileDescriptor() const
70 {
71 return false;
72 }
73
AddFileDescriptor(int32_t,uint32_t)74 bool NoneIoWaiter::AddFileDescriptor(int32_t, uint32_t)
75 {
76 HILOGW("AddFileDescriptor: Function is not supported !!!");
77 return false;
78 }
79
RemoveFileDescriptor(int32_t)80 void NoneIoWaiter::RemoveFileDescriptor(int32_t)
81 {
82 HILOGW("RemoveFileDescriptor: Function is not supported !!!");
83 }
84
SetFileDescriptorEventCallback(const IoWaiter::FileDescriptorEventCallback &)85 void NoneIoWaiter::SetFileDescriptorEventCallback(const IoWaiter::FileDescriptorEventCallback &)
86 {
87 HILOGW("SetFileDescriptorEventCallback: Function is not supported !!!");
88 }
89 } // namespace AppExecFwk
90 } // namespace OHOS
91