upload android base code part6

android/system/netd/server/thread_util.h

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2017 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 NETD_SERVER_THREAD_UTIL_H
+#define NETD_SERVER_THREAD_UTIL_H
+
+#include <pthread.h>
+#include <memory>
+
+namespace android {
+namespace net {
+
+struct scoped_pthread_attr {
+    scoped_pthread_attr() { pthread_attr_init(&attr); }
+    ~scoped_pthread_attr() { pthread_attr_destroy(&attr); }
+
+    int detach() {
+        return pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+    }
+
+    pthread_attr_t attr;
+};
+
+template<typename T>
+inline void* runAndDelete(void* obj) {
+    std::unique_ptr<T> handler(reinterpret_cast<T*>(obj));
+    handler->run();
+    return nullptr;
+}
+
+template<typename T>
+inline int threadLaunch(T* obj) {
+    if (obj == nullptr) { return -EINVAL;}
+
+    scoped_pthread_attr scoped_attr;
+
+    int rval = scoped_attr.detach();
+    if (rval != 0) { return -errno; }
+
+    pthread_t thread;
+    rval = pthread_create(&thread, &scoped_attr.attr, &runAndDelete<T>, obj);
+    if (rval != 0) {
+        ALOGW("pthread_create failed: %d", errno);
+        return -errno;
+    }
+
+    return rval;
+}
+
+}  // namespace net
+}  // namespace android
+
+#endif  // NETD_SERVER_THREAD_UTIL_H