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/*
* Copyright (C) 2012 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.
*/
#ifndef ART_RUNTIME_SIGNAL_SET_H_
#define ART_RUNTIME_SIGNAL_SET_H_
#include <signal.h>
#include <android-base/logging.h>
#if defined(__GLIBC__)
#define sigset64_t sigset_t
#define sigemptyset64 sigemptyset
#define sigaddset64 sigaddset
#define pthread_sigmask64 pthread_sigmask
#define sigwait64 sigwait
#endif
namespace art {
class SignalSet {
public:
SignalSet() {
if (sigemptyset64(&set_) == -1) {
PLOG(FATAL) << "sigemptyset failed";
}
}
void Add(int signal) {
if (sigaddset64(&set_, signal) == -1) {
PLOG(FATAL) << "sigaddset " << signal << " failed";
}
}
void Block() {
if (pthread_sigmask64(SIG_BLOCK, &set_, nullptr) != 0) {
PLOG(FATAL) << "pthread_sigmask failed";
}
}
int Wait() {
// Sleep in sigwait() until a signal arrives. gdb causes EINTR failures.
int signal_number;
int rc = TEMP_FAILURE_RETRY(sigwait64(&set_, &signal_number));
if (rc != 0) {
PLOG(FATAL) << "sigwait failed";
}
return signal_number;
}
private:
sigset64_t set_;
};
} // namespace art
#endif // ART_RUNTIME_SIGNAL_SET_H_
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