The Tor Browser: ipc/chromium/src/base/tracked.h@6474c204b198 (annotated)

ipc/chromium/src/base/tracked.h@6474c204b198 (annotated)

ipc/chromium/src/base/tracked.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // Copyright (c) 2006-2008 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.
 //------------------------------------------------------------------------------
 // Tracked is the base class for all tracked objects.  During construction, it
 // registers the fact that an instance was created, and at destruction time, it
 // records that event.  The instance may be tagged with a name, which is refered
 // to as its Location.  The Location is a file and line number, most
 // typically indicated where the object was constructed.  In some cases, as the
 // object's significance is refined (for example, a Task object is augmented to
 // do additonal things), its Location may be redefined to that later location.
 // Tracking includes (for each instance) recording the birth thread, death
 // thread, and duration of life (from construction to destruction).  All this
 // data is accumulated and filtered for review at about:objects.
 #ifndef BASE_TRACKED_H_
 #define BASE_TRACKED_H_
 #include <string>
 #include "base/time.h"
 #ifndef NDEBUG
 #ifndef TRACK_ALL_TASK_OBJECTS
 #define TRACK_ALL_TASK_OBJECTS
 #endif   // TRACK_ALL_TASK_OBJECTS
 #endif  // NDEBUG
 namespace tracked_objects {
 //------------------------------------------------------------------------------
 // Location provides basic info where of an object was constructed, or was
 // significantly brought to life.
 class Location {
  public:
   // Constructor should be called with a long-lived char*, such as __FILE__.
   // It assumes the provided value will persist as a global constant, and it
   // will not make a copy of it.
   Location(const char* function_name, const char* file_name, int line_number)
       : function_name_(function_name),
         file_name_(file_name),
         line_number_(line_number) { }
   // Provide a default constructor for easy of debugging.
   Location()
       : function_name_("Unknown"),
         file_name_("Unknown"),
         line_number_(-1) { }
   // Comparison operator for insertion into a std::map<> hash tables.
   // All we need is *some* (any) hashing distinction.  Strings should already
   // be unique, so we don't bother with strcmp or such.
   // Use line number as the primary key (because it is fast, and usually gets us
   // a difference), and then pointers as secondary keys (just to get some
   // distinctions).
   bool operator < (const Location& other) const {
     if (line_number_ != other.line_number_)
       return line_number_ < other.line_number_;
     if (file_name_ != other.file_name_)
       return file_name_ < other.file_name_;
     return function_name_ < other.function_name_;
   }
   const char* function_name() const { return function_name_; }
   const char* file_name()     const { return file_name_; }
   int line_number()           const { return line_number_; }
   void Write(bool display_filename, bool display_function_name,
              std::string* output) const;
   // Write function_name_ in HTML with '<' and '>' properly encoded.
   void WriteFunctionName(std::string* output) const;
  private:
   const char* const function_name_;
   const char* const file_name_;
   const int line_number_;
 };
 //------------------------------------------------------------------------------
 // Define a macro to record the current source location.
 #define FROM_HERE tracked_objects::Location(__FUNCTION__, __FILE__, __LINE__)
 //------------------------------------------------------------------------------
 class Births;
 class Tracked {
  public:
   Tracked();
   virtual ~Tracked();
   // Used to record the FROM_HERE location of a caller.
   void SetBirthPlace(const Location& from_here);
   // When a task sits around a long time, such as in a timer, or object watcher,
   // this method should be called when the task becomes active, and its
   // significant lifetime begins (and its waiting to be woken up has passed).
   void ResetBirthTime();
   bool MissingBirthplace() const;
  private:
 #ifdef TRACK_ALL_TASK_OBJECTS
   // Pointer to instance were counts of objects with the same birth location
   // (on the same thread) are stored.
   Births* tracked_births_;
   // The time this object was constructed.  If its life consisted of a long
   // waiting period, and then it became active, then this value is generally
   // reset before the object begins it active life.
   base::Time tracked_birth_time_;
 #endif  // TRACK_ALL_TASK_OBJECTS
   DISALLOW_COPY_AND_ASSIGN(Tracked);
 };
 }  // namespace tracked_objects
 #endif  // BASE_TRACKED_H_

The Tor Browser / annotate

ipc/chromium/src/base/tracked.h@6474c204b198 (annotated)

ipc/chromium/src/base/tracked.h