1 files changed, 62 insertions, 0 deletions
diff --git a/runtime/signal_set.h b/runtime/signal_set.h
new file mode 100644
index 0000000..d4aec86
--- /dev/null
+++ b/runtime/signal_set.h
@@ -0,0 +1,62 @@
+/*
+ * 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_SRC_SIGNAL_SET_H_
+#define ART_SRC_SIGNAL_SET_H_
+
+#include <signal.h>
+
+#include "base/logging.h"
+
+namespace art {
+
+class SignalSet {
+ public:
+  SignalSet() {
+    if (sigemptyset(&set_) == -1) {
+      PLOG(FATAL) << "sigemptyset failed";
+    }
+  }
+
+  void Add(int signal) {
+    if (sigaddset(&set_, signal) == -1) {
+      PLOG(FATAL) << "sigaddset " << signal << " failed";
+    }
+  }
+
+  void Block() {
+    if (sigprocmask(SIG_BLOCK, &set_, NULL) == -1) {
+      PLOG(FATAL) << "sigprocmask failed";
+    }
+  }
+
+  int Wait() {
+    // Sleep in sigwait() until a signal arrives. gdb causes EINTR failures.
+    int signal_number;
+    int rc = TEMP_FAILURE_RETRY(sigwait(&set_, &signal_number));
+    if (rc != 0) {
+      PLOG(FATAL) << "sigwait failed";
+    }
+    return signal_number;
+  }
+
+ private:
+  sigset_t set_;
+};
+
+}  // namespace art
+
+#endif  // ART_SRC_SIGNAL_SET_H_