logo
down
shadow

Why is the Loki library not more widely used?


Why is the Loki library not more widely used?

By : Ben C
Date : October 21 2020, 11:12 PM
hope this fix your issue Loki is a research/proof-of-concept sort of thing. Alexandrescu pushes new ideas, other people adopt those for real world. Also boost::shared_ptr is almost literally in TR1.
code :


Share : facebook icon twitter icon
How do I create an nullary Functor in C++ (using the loki library)

How do I create an nullary Functor in C++ (using the loki library)


By : Glum
Date : March 29 2020, 07:55 AM
will be helpful for those in need Looking at the source code, the Functor template definition is as follows:
code :
template <typename R = void, class TList = NullType,
        template<class, class> class ThreadingModel = LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL>
    class Functor{...};
typedef Functor<> BitButtonPushHandler;
Is there a widely used library of patterns & interfaces for .NET 3.5?

Is there a widely used library of patterns & interfaces for .NET 3.5?


By : pepos
Date : March 29 2020, 07:55 AM
seems to work fine Castle Project
ActiveRecord - Active Record pattern implementation leveraging NHibernate ActiveWriter - Visual Design Environment for NHibernate or ActiveRecord Windsor IoC Container MonoRail MVC Framework DynamicProxy
Strange memory problem of Loki::Singleton, Loki::SmartPtr, and std::vector

Strange memory problem of Loki::Singleton, Loki::SmartPtr, and std::vector


By : Padawan
Date : March 29 2020, 07:55 AM
hop of those help? As you're using VC, you should be able to run your code in debug mode, step by stp (F10,F11) to see where it breaks.
Anyway, looking at the Loki singleton code, it seems that the error comes from the assert in SingletonHolder::DestroySingleton() :
code :
 SingletonHolder<T, CreationPolicy, L, M, X>::DestroySingleton()
00837     {
00838         assert(!destroyed_); // there, but it's a wild guess
00839         CreationPolicy<T>::Destroy(pInstance_);
00840         pInstance_ = 0;
00841         destroyed_ = true;
00842     }
00800     template
00801     <
00802         class T,
00803         template <class> class CreationPolicy,
00804         template <class> class LifetimePolicy,
00805         template <class, class> class ThreadingModel,
00806         class MutexPolicy
00807     >
00808     void SingletonHolder<T, CreationPolicy, 
00809         LifetimePolicy, ThreadingModel, MutexPolicy>::MakeInstance()
00810     {
00811         typename ThreadingModel<SingletonHolder,MutexPolicy>::Lock guard;
00812         (void)guard;
00813         
00814         if (!pInstance_)
00815         {
00816             if (destroyed_)
00817             {
00818                 destroyed_ = false;
00819                 LifetimePolicy<T>::OnDeadReference();
00820             }
00821             pInstance_ = CreationPolicy<T>::Create();
00822             LifetimePolicy<T>::ScheduleDestruction(pInstance_, // here
00823                 &DestroySingleton);
00824         }
00825     }
understanding STATIC_CHECK in Loki library

understanding STATIC_CHECK in Loki library


By : supernoob
Date : March 29 2020, 07:55 AM
help you fix your problem We have specialization for class CompileTimeError, that has default constructor. Instanciations of other cases will cause error, that CompileTimeError is undefined type (in your case we trying to create variable ERROR_Destination_Type_Too_Narrow of type CompileTimeError). (void)VariableName is only silence of -Wunused
Is there a widely used multiprocessing abstraction library available for c++?

Is there a widely used multiprocessing abstraction library available for c++?


By : jvnlendm
Date : March 29 2020, 07:55 AM
To fix this issue OpenMP (Open Multi-Processing) is the only library I know of http://en.wikipedia.org/wiki/OpenMP -- it does not however, handle things the way Python does by creating new processes. OpenMP is a compiler extension, supported by Microsoft and GNU GCC.
Example: OpenMP sieve of eratosthenes
code :
// odd-only sieve
int eratosthenesOdd(int lastNumber, bool useOpenMP)
{
  // enable/disable OpenMP
  omp_set_num_threads(useOpenMP ? omp_get_num_procs() : 1);
  // instead of i*i <= lastNumber we write i <= lastNumberSquareRoot to help OpenMP
  const int lastNumberSqrt = (int)sqrt((double)lastNumber);
  int memorySize = (lastNumber-1)/2;
  // initialize
  char* isPrime = new char[memorySize+1];
  #pragma omp parallel for
  for (int i = 0; i <= memorySize; i++)
    isPrime[i] = 1;
  // find all odd non-primes
  #pragma omp parallel for schedule(dynamic)
  for (int i = 3; i <= lastNumberSqrt; i += 2)
    if (isPrime[i/2])
      for (int j = i*i; j <= lastNumber; j += 2*i)
        isPrime[j/2] = 0;
  // sieve is complete, count primes
  int found = lastNumber >= 2 ? 1 : 0;
  #pragma omp parallel for reduction(+:found)
  for (int i = 1; i <= memorySize; i++)
    found += isPrime[i];
  delete[] isPrime;
  return found;
}
Related Posts Related Posts :
  • `LoadLibraryExW` triggers exception `0xC0000023` from `NtMapViewOfSection`
  • static_cast to a struct type to access all of its member variable
  • Forward declaration for boost::intrusive_ptr class to reduce compile time
  • How to use priority_queue with a non-static compare method of class instance?
  • Template parameters inside and outside class/struct
  • Determining prime number
  • How to resolve ambiguity between constructors taking std::string and std::vector
  • My program crashes when I try to change private values from an object
  • Unordered_map with custom class as key
  • Strict aliasing rules broken with templates and inheritance
  • C++ Derived Class Override Return Type
  • singly linked list c++ constructor, destructor and printing out
  • How to clone class with vector of unique_ptr to base class
  • error: no match for operator
  • std::vector doesnt accept my struct as template
  • selection of people's contours
  • how to fix the (Error using mexOpenCV) on matlab?
  • Is or was there a proposal for c++ to use the context for short enum values?
  • Fair assumptions about std::hash implementations
  • undefined reference to libusb using cyusb
  • Function returns null pointer instead of address
  • C++17 copy elision and object destruction
  • Input multiple strings via operator>> c++
  • Avoiding overflow boost container
  • How to Write a Lambda Wrapping a Function with Optional Return Value
  • Partial specialization with more template parameters
  • How to convert fixed size array to pointer on pointer array
  • Memory leak in const member constructor with tag dispatching
  • C++ function with a generic and optional class
  • Custom QGraphicsItem That Contains Child QGraphicsItems
  • Are There Restrictions on What can be Passed to auto Template Parameters?
  • Rotating line inside rectangle bounds
  • Why do I need dynamic memory allocation if I can just create an array?
  • How can I convert a text file into a form that MPI_Bcast can send?
  • How to get array of all `this` of an instance
  • Using pointers as parameters
  • Automatic type deduction with const_cast is not working
  • Why does std::is_rvalue_reference not do what it is advertised to do?
  • Function Template Specialization with Forward Declared Type
  • template deduction failed in vector
  • Is there a signed `sizeof` alternative in Qt
  • clarification on overloading the -> operator
  • What is __m128d?
  • QtConcurrent: why releaseThread and reserveThread cause deadlock?
  • Function receiving different value than passed
  • Can C++ close a '''fstream''' variable after '''.close()'''?
  • Is it necessary to overload operator in this specific case
  • Comparing an element of a string array with a string
  • how to dereference a pointer of a map of pointers to objects in c++
  • How recursive function control flow change for static variable?
  • SDL 2 blitting BMP File
  • Why does an extremely large value cause this code to repeat infinitely?
  • Function returning different value than what is in function body before return statement
  • Struggling with including Headers in another header file (C++)
  • WebViewProcessControl initialization crash
  • C++ exception 0xC00000FD: Stack overflow (parameters: 0x00000001, 0x00C02F30)
  • What's difference between forward and move in the constructor of class?
  • C++: Is it possible to condense `bool` objects within the same byte?
  • I cant understand this access modifier
  • Boost Spirit X3: Collapsing one-element lists
  • shadow
    Privacy Policy - Terms - Contact Us © bighow.org