diff -r 000000000000 -r 6474c204b198 media/mtransport/logging.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/mtransport/logging.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Original author: ekr@rtfm.com
+
+#ifndef logging_h__
+#define logging_h__
+
+#if defined(PR_LOG)
+#error "Must #include logging.h before any IPDL-generated files or other files that #include prlog.h."
+#endif
+
+// Enforce logging under production builds for MOZ_MTLOG friends.
+#ifndef PR_LOGGING
+#define FORCE_PR_LOG 1
+#endif
+
+#include <sstream>
+#include <prlog.h>
+
+#if defined(PR_LOGGING)
+
+#define ML_EMERG            1
+#define ML_ERROR            2
+#define ML_WARNING          3
+#define ML_NOTICE           4
+#define ML_INFO             5
+#define ML_DEBUG            6
+
+// PR_LOGGING is on --> make useful MTLOG macros
+#define MOZ_MTLOG_MODULE(n) \
+  static PRLogModuleInfo* getLogModule() {      \
+    static PRLogModuleInfo* log;                \
+    if (!log)                                   \
+      log = PR_NewLogModule(n);                 \
+    return log;                                 \
+  }
+
+#define MOZ_MTLOG(level, b) \
+  do {                                                                  \
+    std::stringstream str;                                              \
+    str << b;                                                           \
+    PR_LOG(getLogModule(), level, ("%s", str.str().c_str())); } while(0)
+
+#else
+// PR_LOGGING is off --> make no-op MTLOG macros
+#define MOZ_MTLOG_MODULE(n)
+#define MOZ_MTLOG(level, b)
+
+#endif // defined(PR_LOGGING)
+
+#endif // logging_h__