Add additional include guard in platform specific .h files

R=ager@google.com

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com//9264006

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@3433 260f80e4-7a28-3924-810f-c04153c831b5

runtime/bin/eventhandler_linux.h

@@ -5,6 +5,10 @@
 #ifndef BIN_EVENTHANDLER_LINUX_H_
 #define BIN_EVENTHANDLER_LINUX_H_
 
+#if !defined(BIN_EVENTHANDLER_H_)
+#error Do not include eventhandler_linux.h directly; use eventhandler.h instead.
+#endif
+
 #include <unistd.h>
 #include <sys/socket.h>
 

runtime/bin/eventhandler_macos.h

@@ -1,10 +1,14 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef BIN_EVENTHANDLER_MACOS_H_
 #define BIN_EVENTHANDLER_MACOS_H_
 
+#if !defined(BIN_EVENTHANDLER_H_)
+#error Do not include eventhandler_macos.h directly; use eventhandler.h instead.
+#endif
+
 #include <unistd.h>
 #include <sys/socket.h>
 

runtime/bin/eventhandler_win.h

@@ -1,10 +1,14 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef BIN_EVENTHANDLER_WIN_H_
 #define BIN_EVENTHANDLER_WIN_H_
 
+#if !defined(BIN_EVENTHANDLER_H_)
+#error Do not include eventhandler_win.h directly; use eventhandler.h instead.
+#endif
+
 #include <winsock2.h>
 #include <mswsock.h>
 

runtime/bin/thread_pool_linux.h

@@ -5,6 +5,10 @@
 #ifndef BIN_THREAD_POOL_LINUX_H_
 #define BIN_THREAD_POOL_LINUX_H_
 
+#if !defined(BIN_THREAD_POOL_H_)
+#error Do not include thread_pool_linux.h directly; use thread_pool.h instead.
+#endif
+
 #include <pthread.h>
 
 #include "platform/globals.h"

runtime/bin/thread_pool_macos.h

@@ -5,6 +5,10 @@
 #ifndef BIN_THREAD_POOL_MACOS_H_
 #define BIN_THREAD_POOL_MACOS_H_
 
+#if !defined(BIN_THREAD_POOL_H_)
+#error Do not include thread_pool_macos.h directly; use thread_pool.h instead.
+#endif
+
 #include <pthread.h>
 
 #include "platform/globals.h"

runtime/bin/thread_pool_win.h

@@ -5,6 +5,10 @@
 #ifndef BIN_THREAD_POOL_WIN_H_
 #define BIN_THREAD_POOL_WIN_H_
 
+#if !defined(BIN_THREAD_POOL_H_)
+#error Do not include thread_pool_win.h directly; use thread_pool.h instead.
+#endif
+
 #include "platform/globals.h"
 
 class ThreadPoolData {

runtime/platform/thread_linux.h

@@ -5,6 +5,10 @@
 #ifndef PLATFORM_THREAD_LINUX_H_
 #define PLATFORM_THREAD_LINUX_H_
 
+#if !defined(PLATFORM_THREAD_H_)
+#error Do not include thread_linux.h directly; use thread.h instead.
+#endif
+
 #include <pthread.h>
 
 #include "platform/assert.h"

runtime/platform/thread_macos.h

@@ -5,6 +5,10 @@
 #ifndef PLATFORM_THREAD_MACOS_H_
 #define PLATFORM_THREAD_MACOS_H_
 
+#if !defined(PLATFORM_THREAD_H_)
+#error Do not include thread_macos.h directly; use thread.h instead.
+#endif
+
 #include <pthread.h>
 
 #include "platform/globals.h"

runtime/platform/thread_win.h

@@ -5,6 +5,10 @@
 #ifndef PLATFORM_THREAD_WIN_H_
 #define PLATFORM_THREAD_WIN_H_
 
+#if !defined(PLATFORM_THREAD_H_)
+#error Do not include thread_win.h directly; use thread.h instead.
+#endif
+
 #include "platform/globals.h"
 
 namespace dart {