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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.
// This is a simple struct with tracking information that is stored
// with a PendingTask (when message_loop is handling the task).
// Only the information that is shared with the profiler in tracked_objects
// are included in this structure.
#ifndef BASE_TRACKING_INFO_H_
#define BASE_TRACKING_INFO_H_
#include "base/base_export.h"
#include "base/profiler/tracked_time.h"
#include "base/time/time.h"
namespace tracked_objects {
class Location;
class Births;
}
namespace base {
// This structure is copied around by value.
struct BASE_EXPORT TrackingInfo {
TrackingInfo();
TrackingInfo(const tracked_objects::Location& posted_from,
base::TimeTicks delayed_run_time);
~TrackingInfo();
// To avoid conflating our stats with the delay duration in a PostDelayedTask,
// we identify such tasks, and replace their post_time with the time they
// were scheduled (requested?) to emerge from the delayed task queue. This
// means that queuing delay for such tasks will show how long they went
// unserviced, after they *could* be serviced. This is the same stat as we
// have for non-delayed tasks, and we consistently call it queuing delay.
tracked_objects::TrackedTime EffectiveTimePosted() const {
return delayed_run_time.is_null()
? time_posted
: tracked_objects::TrackedTime(delayed_run_time);
}
// Record of location and thread that the task came from.
tracked_objects::Births* birth_tally;
// Time when the related task was posted. Note that this value may be empty
// if task profiling is disabled, and should only be used in conjunction with
// profiling-related reporting.
tracked_objects::TrackedTime time_posted;
// The time when the task should be run.
base::TimeTicks delayed_run_time;
};
} // namespace base
#endif // BASE_TRACKING_INFO_H_
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