Repo created

TMessagesProj/jni/voip/webrtc/base/logging_win.h

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+// Copyright (c) 2012 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 BASE_LOGGING_WIN_H_
+#define BASE_LOGGING_WIN_H_
+
+#include <stddef.h>
+
+#include <string>
+
+#include "base/base_export.h"
+#include "base/logging.h"
+#include "base/macros.h"
+#include "base/win/event_trace_provider.h"
+
+namespace base {
+template <typename Type>
+struct StaticMemorySingletonTraits;
+}  // namespace base
+
+namespace logging {
+
+// Event ID for the log messages we generate.
+EXTERN_C BASE_EXPORT const GUID kLogEventId;
+
+// Feature enable mask for LogEventProvider.
+enum LogEnableMask {
+  // If this bit is set in our provider enable mask, we will include
+  // a stack trace with every log message.
+  ENABLE_STACK_TRACE_CAPTURE = 0x0001,
+  // If this bit is set in our provider enable mask, the provider will log
+  // a LOG message with only the textual content of the message, and no
+  // stack trace.
+  ENABLE_LOG_MESSAGE_ONLY = 0x0002,
+};
+
+// The message types our log event provider generates.
+// ETW likes user message types to start at 10.
+enum LogMessageTypes {
+  // A textual only log message, contains a zero-terminated string.
+  LOG_MESSAGE = 10,
+  // A message with a stack trace, followed by the zero-terminated
+  // message text.
+  LOG_MESSAGE_WITH_STACKTRACE = 11,
+  // A message with:
+  //  a stack trace,
+  //  the line number as a four byte integer,
+  //  the file as a zero terminated UTF8 string,
+  //  the zero-terminated UTF8 message text.
+  LOG_MESSAGE_FULL = 12,
+};
+
+// Trace provider class to drive log control and transport
+// with Event Tracing for Windows.
+class BASE_EXPORT LogEventProvider : public base::win::EtwTraceProvider {
+ public:
+  static LogEventProvider* GetInstance();
+
+  static bool LogMessage(logging::LogSeverity severity, const char* file,
+      int line, size_t message_start, const std::string& str);
+
+  static void Initialize(const GUID& provider_name);
+  static void Uninitialize();
+
+ protected:
+  // Overridden to manipulate the log level on ETW control callbacks.
+  void OnEventsEnabled() override;
+  void OnEventsDisabled() override;
+
+ private:
+  LogEventProvider();
+
+  // The log severity prior to OnEventsEnabled,
+  // restored in OnEventsDisabled.
+  logging::LogSeverity old_log_level_;
+
+  friend struct base::StaticMemorySingletonTraits<LogEventProvider>;
+  DISALLOW_COPY_AND_ASSIGN(LogEventProvider);
+};
+
+}  // namespace logging
+
+#endif  // BASE_LOGGING_WIN_H_