1 /**
2 * Copyright 2020 Huawei Technologies Co., Ltd
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "utils/signal_util.h"
18 #include <csignal>
19 #include "utils/log_adapter.h"
20 #include "backend/session/kernel_build_client.h"
21
22 namespace mindspore {
SignalGuard(IntHandlerFunc IntHandler)23 SignalGuard::SignalGuard(IntHandlerFunc IntHandler) { RegisterHandlers(IntHandler); }
24
~SignalGuard()25 SignalGuard::~SignalGuard() {
26 if (old_handler != nullptr) {
27 int_action.sa_sigaction = old_handler;
28 (void)sigemptyset(&int_action.sa_mask);
29 int_action.sa_flags = SA_RESTART | SA_SIGINFO;
30 (void)sigaction(SIGINT, &int_action, nullptr);
31 old_handler = nullptr;
32 }
33 }
34
RegisterHandlers(IntHandlerFunc IntHandler)35 void SignalGuard::RegisterHandlers(IntHandlerFunc IntHandler) {
36 struct sigaction old_int_action;
37 (void)sigaction(SIGINT, nullptr, &old_int_action);
38 if (old_int_action.sa_sigaction != nullptr) {
39 MS_LOG(DEBUG) << "The signal has been registered";
40 old_handler = old_int_action.sa_sigaction;
41 }
42 int_action.sa_sigaction = IntHandler;
43 (void)sigemptyset(&int_action.sa_mask);
44 int_action.sa_flags = SA_RESTART | SA_SIGINFO;
45 (void)sigaction(SIGINT, &int_action, nullptr);
46 }
47 } // namespace mindspore
48