Teuchos_PerformanceMonitorBase.hpp

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#ifndef TEUCHOS_PERFORMANCEMONITORBASE_H
#define TEUCHOS_PERFORMANCEMONITORBASE_H

#include "Teuchos_ConfigDefs.hpp"
#include "Teuchos_Array.hpp"
#include "Teuchos_Comm.hpp"
#include "Teuchos_RCP.hpp"
#include "Teuchos_TableFormat.hpp"

namespace Teuchos
{
  enum ECounterSetOp { Intersection, Union };

  void
  mergeCounterNames (const Comm<int>& comm,
                     const Array<std::string>& localNames,
                     Array<std::string>& globalNames,
                     const ECounterSetOp setOp);

  template <class T>
  class PerformanceMonitorBase
  {
  public:
    PerformanceMonitorBase(T& counter_in, bool reset=false)
      : counter_(counter_in), isRecursiveCall_(counter_.isRunning())
    {
      (void) reset;  // get rid of "unused parameter" warning
      counter_.incrementNumCalls ();
    }

    virtual ~PerformanceMonitorBase() {}

    static RCP<T> getNewCounter (const std::string& name);

    static TableFormat& format()
    {
      // WARNING This is not thread safe!  In particular, if multiple
      // threads call this method for the "first time" at the same
      // time, the RCP may be initialized incorrectly.
      static RCP<TableFormat> rtn=rcp(new TableFormat());
      return *rtn;
    }

    static RCP<T>
    lookupCounter (const std::string& name);

    static void clearCounters ();

    static TEUCHOS_DEPRECATED void clearTimers ();

    static void clearCounter (const std::string& name);

    static TEUCHOS_DEPRECATED void clearTimer (const std::string& name);

  protected:

    const T& counter() const { return counter_; }

    T& counter() { return counter_; }

    bool isRecursiveCall() const { return isRecursiveCall_; }

    static std::map<std::string, RCP<T> >& counters()
    {
      // Use the "Meyers Trick" to create static data safely.
      //
      // WARNING This is not thread safe!  In particular, if multiple
      // threads call counters() for the "first time" at the same
      // time, the array may be initialized incorrectly.
      static std::map<std::string, RCP<T> > theCounters;
      static int initialized;
      if (! initialized) {
        theCounters.clear ();
        initialized = 1;
      }
      return theCounters;
    }

  private:

    T& counter_;

    bool isRecursiveCall_;
  };

  template<class T>
  RCP<T>
  PerformanceMonitorBase<T>::getNewCounter (const std::string& name)
  {
    typedef std::map<std::string, RCP<T> > map_type;
    typedef typename map_type::iterator iter_type;

    map_type& ctrs = counters ();
    iter_type it = ctrs.find (name);
    RCP<T> newCounter = null;
    if (it == ctrs.end ()) {
      newCounter = rcp (new T (name));
#ifdef HAVE_TEUCHOS_DEBUG
      const bool wasNotThere = ctrs.insert (std::make_pair (name, newCounter)).second;
      TEUCHOS_TEST_FOR_EXCEPTION(
        ! wasNotThere, std::logic_error,
        "getNewCounter: insert() claims that timer \"" << name << "\" was "
        "already there in the map, even though find() claims that it was not.  "
        "Please report this bug to the Teuchos developers.");
#else
      // Use the returned iterator to optimize insertion.
      ctrs.insert (it, std::make_pair (name, newCounter));
#endif // HAVE_TEUCHOS_DEBUG
    } else {
      newCounter = it->second;
#ifdef HAVE_TEUCHOS_DEBUG
      TEUCHOS_TEST_FOR_EXCEPTION(
        it->second.is_null (), std::logic_error,
        "getNewCounter: Timer \"" << name << "\" was already there in the map, "
        "but looking it up by name resulted in a null timer.  "
        "Please report this bug to the Teuchos developers.");
      TEUCHOS_TEST_FOR_EXCEPTION(
        name != it->second->name (), std::logic_error,
        "getNewCounter: Timer \"" << name << "\" was already there in the map, "
        "but looking it up by name resulted in a timer with a different name \""
        << it->second->name () << "\".  Please report this bug to the Teuchos "
        "developers.");
#endif // HAVE_TEUCHOS_DEBUG
    }

#ifdef HAVE_TEUCHOS_DEBUG
    TEUCHOS_TEST_FOR_EXCEPTION(
      newCounter.is_null (), std::logic_error,
      "getNewCounter: At end of method, when creating timer \"" << name
      << "\", newCounter is null.  Please report this bug to the Teuchos "
      "developers.");
#endif // HAVE_TEUCHOS_DEBUG
    return newCounter;
  }

  template<class T>
  RCP<T>
  PerformanceMonitorBase<T>::lookupCounter (const std::string& name)
  {
    typedef std::map<std::string, RCP<T> > map_type;
    typedef typename map_type::iterator iter_type;

    map_type& ctrs = counters ();
    iter_type it = ctrs.find (name);
    if (it == ctrs.end ()) {
      return null;
    } else {
      return it->second;
    }
  }

  template<class T>
  void
  PerformanceMonitorBase<T>::clearCounter (const std::string& name)
  {
    counters ().erase (name);
  }

  template<class T>
  void
  PerformanceMonitorBase<T>::clearTimer (const std::string& name)
  {
    clearCounter (name);
  }

  template<class T>
  void
  PerformanceMonitorBase<T>::clearTimers ()
  {
    clearCounters ();
  }

  template<class T>
  void
  PerformanceMonitorBase<T>::clearCounters ()
  {
    counters ().clear ();
  }

} // namespace Teuchos

#endif // TEUCHOS_PERFORMANCEMONITORBASE_H