1 /*
2 * Copyright (c) 2024, The OpenThread Authors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "async_task.hpp"
30
31 #include <assert.h>
32 #include <memory>
33
34 #include "common/code_utils.hpp"
35
36 namespace otbr {
37 namespace Ncp {
38
AsyncTask(const ResultHandler & aResultHandler)39 AsyncTask::AsyncTask(const ResultHandler &aResultHandler)
40 : mResultHandler(aResultHandler)
41 {
42 }
43
~AsyncTask()44 AsyncTask::~AsyncTask()
45 {
46 if (!mNext)
47 {
48 if (mResultHandler)
49 {
50 mResultHandler(OT_ERROR_FAILED, "AsyncTask ends without setting any result.");
51 }
52 }
53 }
54
Run(void)55 void AsyncTask::Run(void)
56 {
57 SetResult(OT_ERROR_NONE, "");
58 }
59
SetResult(otError aError,const std::string & aErrorInfo)60 void AsyncTask::SetResult(otError aError, const std::string &aErrorInfo)
61 {
62 if (mNext)
63 {
64 if (aError == OT_ERROR_NONE)
65 {
66 mThen(std::move(mNext));
67 }
68 else
69 {
70 mNext->SetResult(aError, aErrorInfo);
71 }
72 mThen = nullptr;
73 }
74 else
75 {
76 mResultHandler(aError, aErrorInfo);
77 mResultHandler = nullptr;
78 }
79 }
80
First(const ThenHandler & aFirst)81 AsyncTaskPtr &AsyncTask::First(const ThenHandler &aFirst)
82 {
83 assert(mNext == nullptr);
84
85 return Then(aFirst);
86 }
87
Then(const ThenHandler & aThen)88 AsyncTaskPtr &AsyncTask::Then(const ThenHandler &aThen)
89 {
90 assert(mNext == nullptr);
91
92 mNext = std::make_shared<AsyncTask>(mResultHandler);
93 mThen = aThen;
94
95 return mNext;
96 }
97
98 } // namespace Ncp
99 } // namespace otbr
100