churn_allocator< T > Class Template Reference

#include <ChurnAllocator.h>

Inheritance diagram for churn_allocator< T >:

Classes
struct	Cache
struct	rebind

Public Types
using	Base = std::allocator< T >
using	pointer = typename Base::pointer
using	size_type = typename Base::size_type

Public Member Functions
pointer	allocate (size_type n, const void *hint=0)
	churn_allocator ()=default
	churn_allocator (churn_allocator const &)=default
	churn_allocator (churn_allocator &&)=default
template<class U >
	churn_allocator (const churn_allocator< U > &a) noexcept
void	deallocate (pointer p, size_type n)

Static Public Member Functions
static Cache &	cache ()

Detailed Description

template<typename T>
class churn_allocator< T >

Definition at line 6 of file ChurnAllocator.h.

Member Typedef Documentation

template<typename T>

using churn_allocator< T >::Base = std::allocator<T>

Definition at line 9 of file ChurnAllocator.h.

template<typename T>

using churn_allocator< T >::pointer = typename Base::pointer

Definition at line 10 of file ChurnAllocator.h.

template<typename T>

using churn_allocator< T >::size_type = typename Base::size_type

Definition at line 11 of file ChurnAllocator.h.

Constructor & Destructor Documentation

template<typename T>

churn_allocator< T >::churn_allocator ( )

default

template<typename T>

churn_allocator< T >::churn_allocator ( churn_allocator< T > const &  )

default

template<typename T>

churn_allocator< T >::churn_allocator ( churn_allocator< T > &&  )

default

template<typename T>

template<class U >

churn_allocator< T >::churn_allocator ( const churn_allocator< U > &  a )

inlinenoexcept

Definition at line 50 of file ChurnAllocator.h.

: std::allocator<T>(a) { }

Member Function Documentation

template<typename T>

pointer churn_allocator< T >::allocate ( size_type  n, const void *  hint = 0  )

inline

Definition at line 30 of file ChurnAllocator.h.

References trackerHits::c, churn_allocator< T >::Cache::cache, churn_allocator< T >::cache(), and churn_allocator< T >::Cache::gard.

  {
    Cache & c = cache();
    if (!c.gard) 
     c.cache = std::allocator<T>::allocate(n, hint);
    c.gard=false; return c.cache;
  }

template<typename T>

static Cache& churn_allocator< T >::cache ( )

inlinestatic

Definition at line 18 of file ChurnAllocator.h.

Referenced by churn_allocator< T >::allocate(), and churn_allocator< T >::deallocate().

                          {
    static thread_local Cache local;
    return local;
  } 

template<typename T>

void churn_allocator< T >::deallocate ( pointer  p, size_type  n  )

inline

Definition at line 38 of file ChurnAllocator.h.

References trackerHits::c, churn_allocator< T >::Cache::cache, churn_allocator< T >::cache(), and churn_allocator< T >::Cache::gard.

  {
    Cache & c = cache();
    if (p==c.cache) c.gard=true;
    else std::allocator<T>::deallocate(p, n);
  }