Update Crashpad to 4a2043ea65e2641ef1a921801c0aaa15ada02fc7

third_party/crashpad/crashpad/util/win/session_end_watcher.h

+// Copyright 2017 The Crashpad Authors. All rights reserved.
+//
+// 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 CRASHPAD_UTIL_WIN_SESSION_END_WATCHER_H_
+#define CRASHPAD_UTIL_WIN_SESSION_END_WATCHER_H_
+
+#include <windows.h>
+
+#include "base/macros.h"
+#include "util/thread/thread.h"
+#include "util/win/scoped_handle.h"
+
+namespace crashpad {
+
+//! \brief Creates a hidden window and waits for a `WM_ENDSESSION` message,
+//!     indicating that the session is ending and the application should
+//!     terminate.
+//!
+//! A dedicated thread will be created to run the `GetMessage()`-based message
+//! loop required to monitor for this message.
+//!
+//! Users should subclass this class and receive notifications by implementing
+//! the SessionEndWatcherEvent() method.
+class SessionEndWatcher : public Thread {
+ public:
+  SessionEndWatcher();
+
+  //! \note The destructor waits for the thread that runs the message loop to
+  //!     terminate.
+  ~SessionEndWatcher() override;
+
+ protected:
+  // Exposed for testing.
+  HWND GetWindow() const { return window_; }
+
+  // Exposed for testing. Blocks until window_ has been created. May be called
+  // multiple times if necessary.
+  void WaitForStart();
+
+  // Exposed for testing. Blocks until the message loop ends. May be called
+  // multiple times if necessary.
+  void WaitForStop();
+
+ private:
+  // Thread:
+  void ThreadMain() override;
+
+  static LRESULT CALLBACK WindowProc(HWND window,
+                                     UINT message,
+                                     WPARAM w_param,
+                                     LPARAM l_param);
+
+  //! \brief A `WM_ENDSESSION` message was received and it indicates that the
+  //!     user session will be ending imminently.
+  //!
+  //! This method is called on the thread that runs the message loop.
+  virtual void SessionEnding() = 0;
+
+  HWND window_;  // Conceptually strong, but ownership managed in ThreadMain()
+  ScopedKernelHANDLE started_;
+  ScopedKernelHANDLE stopped_;
+
+  DISALLOW_COPY_AND_ASSIGN(SessionEndWatcher);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_UTIL_WIN_SESSION_END_WATCHER_H_