chrome/browser/chromeos/drive/logging.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/chromeos/drive/logging.h"
   6
   7 #include <stdarg.h>   // va_list
   8 #include <string>
   9
  10 #include "base/lazy_instance.h"
  11 #include "base/strings/stringprintf.h"
  12 #include "chrome/browser/drive/event_logger.h"
  13
  14 namespace drive {
  15 namespace util {
  16 namespace {
  17
  18 static base::LazyInstance<EventLogger> g_logger =
  19     LAZY_INSTANCE_INITIALIZER;
  20
  21 }  // namespace
  22
  23 void Log(logging::LogSeverity severity, const char* format, ...) {
  24   std::string what;
  25
  26   va_list args;
  27   va_start(args, format);
  28   base::StringAppendV(&what, format, args);
  29   va_end(args);
  30
  31   DVLOG(1) << what;
  32
  33   // On thread-safety: LazyInstance guarantees thread-safety for the object
  34   // creation. EventLogger::Log() internally maintains the lock.
  35   EventLogger* ptr = g_logger.Pointer();
  36   ptr->Log(severity, what);
  37 }
  38
  39 std::vector<EventLogger::Event> GetLogHistory() {
  40   EventLogger* ptr = g_logger.Pointer();
  41   return ptr->GetHistory();
  42 }
  43
  44 }  // namespace util
  45 }  // namespace drive