Clean up channel modes

ipc/ipc_channel.h

 // Copyright (c) 2010 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 IPC_IPC_CHANNEL_H_
 #define IPC_IPC_CHANNEL_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "ipc/ipc_channel_handle.h"
@@ skipping 44 matching lines @@
     // Called on the server side when a channel that listens for connections
     // denies an attempt to connect.
     virtual void OnChannelDenied() {}
 
     // Called on the server side when a channel that listens for connections
     // has an error that causes the listening channel to close.
     virtual void OnChannelListenError() {}
 #endif  // OS_POSIX
   };
 
+  // Flags to test modes
+  enum ModeFlags {
+    MODE_NO_FLAG = 0x0,
+    MODE_SERVER_FLAG = 0x1,
+    MODE_CLIENT_FLAG = 0x2,
+    MODE_NAMED_FLAG = 0x4
+  };
+
+  // Some Standard Modes
   enum Mode {
-    MODE_NONE,
-    MODE_SERVER,
-    MODE_CLIENT,
+    MODE_NONE = MODE_NO_FLAG,
+    MODE_SERVER = MODE_SERVER_FLAG,
+    MODE_CLIENT = MODE_CLIENT_FLAG,
     // Channels on Windows are named by default and accessible from other
     // processes. On POSIX channels are anonymous by default and not accessible
     // from other processes. Named channels work via named unix domain sockets.
-    // On Windows MODE_NAMED_SERVER == MODE_SERVER and
-    // MODE_NAMED_CLIENT == MODE_CLIENT.
-    MODE_NAMED_SERVER,
-    MODE_NAMED_CLIENT,
+    // On Windows MODE_NAMED_SERVER is equivalent to MODE_SERVER and
+    // MODE_NAMED_CLIENT is equivalent to MODE_CLIENT.
+    MODE_NAMED_SERVER = MODE_SERVER_FLAG | MODE_NAMED_FLAG,
+    MODE_NAMED_CLIENT = MODE_CLIENT_FLAG | MODE_NAMED_FLAG,
   };
 
   enum {
     // The maximum message size in bytes. Attempting to receive a
     // message of this size or bigger results in a channel error.
     kMaximumMessageSize = 128 * 1024 * 1024,
 
     // Ammount of data to read at once from the pipe.
     kReadBufferSize = 4 * 1024
   };
@@ skipping 82 matching lines @@
     HELLO_MESSAGE_TYPE = kuint16max  // Maximum value of message type (uint16),
                                      // to avoid conflicting with normal
                                      // message types, which are enumeration
                                      // constants starting from 0.
   };
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_CHANNEL_H_