OLD | NEW |
(Empty) | |
| 1 // Copyright (c) 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef COMPONENTS_BROWSER_WATCHER_WATCHER_CLIENT_WIN_H_ |
| 6 #define COMPONENTS_BROWSER_WATCHER_WATCHER_CLIENT_WIN_H_ |
| 7 |
| 8 #include "base/command_line.h" |
| 9 #include "base/macros.h" |
| 10 #include "base/process/process_handle.h" |
| 11 #include "base/win/scoped_handle.h" |
| 12 |
| 13 namespace browser_watcher { |
| 14 |
| 15 // An interface class to take care of the details in launching a browser |
| 16 // watch process. |
| 17 class WatcherClient { |
| 18 public: |
| 19 // Constructs a watcher client with a |base_command_line|, which should be |
| 20 // a command line sufficient to invoke the watcher process. This command |
| 21 // line will be augmented with the value of the inherited handle. |
| 22 explicit WatcherClient(const base::CommandLine& base_command_line); |
| 23 |
| 24 // Launches the watcher process. |
| 25 void LaunchWatcher(); |
| 26 |
| 27 // Accessors, exposed only for testing. |
| 28 bool use_legacy_launch() const { return use_legacy_launch_; } |
| 29 void set_use_legacy_launch(bool use_legacy_launch) { |
| 30 use_legacy_launch_ = use_legacy_launch; |
| 31 } |
| 32 base::ProcessHandle process() const { return process_.Get(); } |
| 33 |
| 34 private: |
| 35 // Launches |cmd_line| such that the child process is able to inherit |
| 36 // |handle|. If |use_legacy_launch_| is true, this uses a non-threadsafe |
| 37 // legacy launch mode that's compatible with Windows XP. |
| 38 // Returns a handle to the child process. |
| 39 base::win::ScopedHandle LaunchWatcherProcess( |
| 40 const base::CommandLine& cmd_line, base::ProcessHandle self_handle); |
| 41 |
| 42 // If true, the watcher process will be launched with XP legacy handle |
| 43 // inheritance. This is not thread safe and can leak random handles into the |
| 44 // child process, but it's the best we can do on XP. |
| 45 bool use_legacy_launch_; |
| 46 |
| 47 // The base command line passed to the constructor. |
| 48 base::CommandLine base_command_line_; |
| 49 |
| 50 // A handle to the launched watcher process. Valid after a successful |
| 51 // LaunchWatcher() call. |
| 52 base::win::ScopedHandle process_; |
| 53 |
| 54 DISALLOW_COPY_AND_ASSIGN(WatcherClient); |
| 55 }; |
| 56 |
| 57 } // namespace browser_watcher |
| 58 |
| 59 #endif // COMPONENTS_BROWSER_WATCHER_WATCHER_CLIENT_WIN_H_ |
OLD | NEW |