Support HTTP test-server based net unit tests on Android.

tools/android/forwarder2/daemon.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef TOOLS_ANDROID_FORWARDER2_DAEMON_H_
+#define TOOLS_ANDROID_FORWARDER2_DAEMON_H_
+
+#include <string>
+
+#include "base/at_exit.h"
+#include "base/basictypes.h"
+
+namespace forwarder2 {
+
+class Daemon {
+ public:
+  // |pid_file_path| is the file path to which the daemon's PID will be written.
+  // Note that a lock on the file is also acquired to guarantee that a single
+  // instance of daemon is running.
+  explicit Daemon(const std::string& pid_file_path);
+
+  // Returns whether the daemon was successfully spawned. Use |is_daemon| to
+  // distinguish the parent from the child (daemon) process.
+  bool Spawn(bool* is_daemon);
+
+  // Kills the daemon and blocks until it exited.
+  bool Kill();
+
+ private:
+  const std::string pid_file_path_;
+  base::AtExitManager at_exit_manager;
+
+  DISALLOW_COPY_AND_ASSIGN(Daemon);
+};
+
+}  // namespace forwarder2
+
+#endif  // TOOLS_ANDROID_FORWARDER2_DAEMON_H_