POSIX: basic IPC logging

chrome/common/ipc_logging.h

 // Copyright (c) 2006-2008 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 CHROME_COMMON_IPC_LOGGING_H_
 #define CHROME_COMMON_IPC_LOGGING_H_
 
 #include "chrome/common/ipc_message.h"  // For IPC_MESSAGE_LOG_ENABLED.
 
 #ifdef IPC_MESSAGE_LOG_ENABLED
 
 #include "base/lock.h"
-#include "base/object_watcher.h"
 #include "base/singleton.h"
+#include "base/waitable_event_watcher.h"
 #include "chrome/common/ipc_message_utils.h"
 
 class MessageLoop;
 
 namespace IPC {
 
 class Message;
 
 // One instance per process.  Needs to be created on the main thread (the UI
 // thread in the browser) but OnPreDispatchMessage/OnPostDispatchMessage
 // can be called on other threads.
-class Logging : public base::ObjectWatcher::Delegate {
+class Logging : public base::WaitableEventWatcher::Delegate {
  public:
   // Implemented by consumers of log messages.
   class Consumer {
    public:
     virtual void Log(const LogData& data) = 0;
   };
 
   void SetConsumer(Consumer* consumer);
 
   ~Logging();
   static Logging* current();
 
   void Enable();
   void Disable();
-  bool inline Enabled() const;
+  bool Enabled() const { return enabled_; }
 
   // Called by child processes to give the logger object the channel to send
   // logging data to the browser process.
   void SetIPCSender(Message::Sender* sender);
 
   // Called in the browser process when logging data from a child process is
   // received.
   void OnReceivedLoggingMessage(const Message& message);
 
   void OnSendMessage(Message* message, const std::wstring& channel_id);
   void OnPreDispatchMessage(const Message& message);
   void OnPostDispatchMessage(const Message& message,
                              const std::wstring& channel_id);
 
   // Returns the name of the logging enabled/disabled events so that the
   // sandbox can add them to to the policy.  If true, gets the name of the
   // enabled event, if false, gets the name of the disabled event.
   static std::wstring GetEventName(bool enabled);
 
   // Like the *MsgLog functions declared for each message class, except this
   // calls the correct one based on the message type automatically.  Defined in
   // ipc_logging.cc.
   static void GetMessageText(uint16 type, std::wstring* name,
                              const Message* message, std::wstring* params);
 
-  // ObjectWatcher::Delegate implementation
-  void OnObjectSignaled(HANDLE object);
+  // WaitableEventWatcher::Delegate implementation
+  void OnWaitableEventSignaled(base::WaitableEvent* event);
 
   typedef void (*LogFunction)(uint16 type,
                              std::wstring* name,
                              const Message* msg,
                              std::wstring* params);
 
   static void SetLoggerFunctions(LogFunction *functions);
 
  private:
   friend struct DefaultSingletonTraits<Logging>;
   Logging();
 
   std::wstring GetEventName(int browser_pid, bool enabled);
   void OnSendLogs();
   void Log(const LogData& data);
 
   void RegisterWaitForEvent(bool enabled);
 
-  base::ObjectWatcher watcher_;
+  base::WaitableEventWatcher watcher_;
 
-  HANDLE logging_event_on_;
-  HANDLE logging_event_off_;
+  scoped_ptr<base::WaitableEvent> logging_event_on_;
+  scoped_ptr<base::WaitableEvent> logging_event_off_;
   bool enabled_;
 
   std::vector<LogData> queued_logs_;
   bool queue_invoke_later_pending_;
 
   Message::Sender* sender_;
   MessageLoop* main_thread_;
 
   Consumer* consumer_;
 
   static LogFunction *log_function_mapping_;
 };
 
 }  // namespace IPC
 
 #endif // IPC_MESSAGE_LOG_ENABLED
 
 #endif  // CHROME_COMMON_IPC_LOGGING_H_