Allow synchronous messages to be sent from threads other than the main thread...

chrome/common/render_messages_internal.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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <map>
 #include <string>
@@ skipping 803 matching lines @@
                       int /* id of browser window */)
 
   // Tell the renderer which type this view is.
   IPC_MESSAGE_ROUTED1(ViewMsg_NotifyRenderViewType,
                       ViewType::Type /* view_type */)
 
   // Notification that renderer should run some JavaScript code.
   IPC_MESSAGE_ROUTED1(ViewMsg_ExecuteCode,
                       ViewMsg_ExecuteCode_Params)
 
-  // Returns a file handle
-  IPC_MESSAGE_CONTROL2(ViewMsg_DatabaseOpenFileResponse,
-                       int32 /* the ID of the message we're replying to */,
-                       ViewMsg_DatabaseOpenFileResponse_Params)
-
-  // Returns a SQLite error code
-  IPC_MESSAGE_CONTROL2(ViewMsg_DatabaseDeleteFileResponse,
-                       int32 /* the ID of the message we're replying to */,
-                       int /* SQLite error code */)
-
-  // Returns the attributes of a file
-  IPC_MESSAGE_CONTROL2(ViewMsg_DatabaseGetFileAttributesResponse,
-                       int32 /* the ID of the message we're replying to */,
-                       int32 /* the attributes for the given DB file */)
-
-  // Returns the size of a file
-  IPC_MESSAGE_CONTROL2(ViewMsg_DatabaseGetFileSizeResponse,
-                       int32 /* the ID of the message we're replying to */,
-                       int64 /* the size of the given DB file */)
-
   // Notifies the child process of the new database size
   IPC_MESSAGE_CONTROL4(ViewMsg_DatabaseUpdateSize,
                        string16 /* the origin */,
                        string16 /* the database name */,
                        int64 /* the new database size */,
                        int64 /* space available to origin */)
 
   // Asks the child process to close a database immediately
   IPC_MESSAGE_CONTROL2(ViewMsg_DatabaseCloseImmediately,
                        string16 /* the origin */,
@@ skipping 1265 matching lines @@
 
   // Sent by the renderer process to check whether access to web databases is
   // granted by content settings. This may block and trigger a cookie prompt.
   IPC_SYNC_MESSAGE_ROUTED4_1(ViewHostMsg_AllowDatabase,
                              std::string /* origin_url */,
                              string16 /* database name */,
                              string16 /* database display name */,
                              unsigned long /* estimated size */,
                              bool /* result */)
 
-  // Asks the browser process to open a DB file with the given name
-  IPC_MESSAGE_CONTROL3(ViewHostMsg_DatabaseOpenFile,
+  // Asks the browser process to open a DB file with the given name.
+#if defined (OS_WIN)
+  IPC_SYNC_MESSAGE_CONTROL2_1(ViewHostMsg_DatabaseOpenFile,
+                              string16 /* vfs file name */,
+                              int /* desired flags */,
+                              IPC::PlatformFileForTransit /* file_handle */)
+#elif defined(OS_POSIX)
+  IPC_SYNC_MESSAGE_CONTROL2_2(ViewHostMsg_DatabaseOpenFile,
                        string16 /* vfs file name */,
                        int /* desired flags */,
-                       int32 /* a unique message ID */)
+                              IPC::PlatformFileForTransit /* file_handle */,
+                              base::FileDescriptor /* dir_handle */)
+#endif
 
   // Asks the browser process to delete a DB file
-  IPC_MESSAGE_CONTROL3(ViewHostMsg_DatabaseDeleteFile,
+  IPC_SYNC_MESSAGE_CONTROL2_1(ViewHostMsg_DatabaseDeleteFile,
                        string16 /* vfs file name */,
                        bool /* whether or not to sync the directory */,
-                       int32 /* a unique message ID */)
+                              int /* SQLite error code */)
 
   // Asks the browser process to return the attributes of a DB file
-  IPC_MESSAGE_CONTROL2(ViewHostMsg_DatabaseGetFileAttributes,
+  IPC_SYNC_MESSAGE_CONTROL1_1(ViewHostMsg_DatabaseGetFileAttributes,
                        string16 /* vfs file name */,
-                       int32 /* a unique message ID */)
+                              int32 /* the attributes for the given DB file */)
 
   // Asks the browser process to return the size of a DB file
-  IPC_MESSAGE_CONTROL2(ViewHostMsg_DatabaseGetFileSize,
+  IPC_SYNC_MESSAGE_CONTROL1_1(ViewHostMsg_DatabaseGetFileSize,
                        string16 /* vfs file name */,
-                       int32 /* a unique message ID */)
+                              int64 /* the size of the given DB file */)
 
   // Notifies the browser process that a new database has been opened
   IPC_MESSAGE_CONTROL4(ViewHostMsg_DatabaseOpened,
                        string16 /* origin identifier */,
                        string16 /* database name */,
                        string16 /* database description */,
                        int64 /* estimated size */)
 
   // Notifies the browser process that a database might have been modified
   IPC_MESSAGE_CONTROL2(ViewHostMsg_DatabaseModified,
@@ skipping 140 matching lines @@
                        int /* render_view_id */,
                        int /* bridge_id */)
 
   // The |render_view_id| and |bridge_id| requests Geolocation service to
   // resume.
   IPC_MESSAGE_CONTROL2(ViewHostMsg_Geolocation_Resume,
                        int /* render_view_id */,
                        int /* bridge_id */)
 
 IPC_END_MESSAGES(ViewHost)