1 /* 2 * Copyright (C) 2012 The Android Open Source Project 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 #ifndef ART_RUNTIME_SIGNAL_SET_H_ 18 #define ART_RUNTIME_SIGNAL_SET_H_ 19 20 #include <signal.h> 21 22 #include <android-base/logging.h> 23 24 #if defined(__GLIBC__) 25 #define sigset64_t sigset_t 26 #define sigemptyset64 sigemptyset 27 #define sigaddset64 sigaddset 28 #define pthread_sigmask64 pthread_sigmask 29 #define sigwait64 sigwait 30 #endif 31 32 namespace art { 33 34 class SignalSet { 35 public: SignalSet()36 SignalSet() { 37 if (sigemptyset64(&set_) == -1) { 38 PLOG(FATAL) << "sigemptyset failed"; 39 } 40 } 41 Add(int signal)42 void Add(int signal) { 43 if (sigaddset64(&set_, signal) == -1) { 44 PLOG(FATAL) << "sigaddset " << signal << " failed"; 45 } 46 } 47 Block()48 void Block() { 49 if (pthread_sigmask64(SIG_BLOCK, &set_, nullptr) != 0) { 50 PLOG(FATAL) << "pthread_sigmask failed"; 51 } 52 } 53 Wait()54 int Wait() { 55 // Sleep in sigwait() until a signal arrives. gdb causes EINTR failures. 56 int signal_number; 57 int rc = TEMP_FAILURE_RETRY(sigwait64(&set_, &signal_number)); 58 if (rc != 0) { 59 PLOG(FATAL) << "sigwait failed"; 60 } 61 return signal_number; 62 } 63 64 private: 65 sigset64_t set_; 66 }; 67 68 } // namespace art 69 70 #endif // ART_RUNTIME_SIGNAL_SET_H_ 71