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// Copyright (c) 2014 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 COMPONENTS_BROWSER_WATCHER_EXIT_FUNNEL_WIN_H_
#define COMPONENTS_BROWSER_WATCHER_EXIT_FUNNEL_WIN_H_
#include "base/macros.h"
#include "base/process/process_handle.h"
#include "base/strings/string16.h"
#include "base/time/time.h"
#include "base/win/registry.h"
namespace browser_watcher {
// A wrapper class that takes care of persistently recording a trace of named,
// timed events in registry, associated with a process instance. This allows
// reconstructing and reporting an event trace on a subsequent launch.
// The event trace is stored in registry under a new key named
// <pid>-<uniquifier>, where each event is a value named after the event, with
// an associated QWORD value noting the event time.
class ExitFunnel {
public:
ExitFunnel();
~ExitFunnel();
// Initializes the exit funnel with |registry_path| and |process|.
// |process| must be open for PROCESS_QUERY_INFORMATION at least.
// Returns false on failure to create or open the registry path corresponding
// to |process|.
bool Init(const base::char16* registry_path, base::ProcessHandle process);
// Initializes the exit funnel with |registry_path|, |pid| and
// |creation_time|.
// Returns false on failure to create or open the registry path corresponding
// to |process|.
// Exposed for testing.
bool InitImpl(const base::char16* registry_path,
base::ProcessId pid,
base::Time creation_time);
// Records |event_name| at the current time in the registry for the process
// this instance is associated with. Returns false on failure to record the
// event.
bool RecordEvent(const base::char16* event_name);
// Records |event_name| at the current time in the registry at |registry_path|
// for this process.
static bool RecordSingleEvent(const base::char16* registry_path,
const base::char16* event_name);
private:
base::win::RegKey key_;
DISALLOW_COPY_AND_ASSIGN(ExitFunnel);
};
} // namespace browser_watcher
#endif // COMPONENTS_BROWSER_WATCHER_EXIT_FUNNEL_WIN_H_
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