MemoryAllocator-impl.hpp

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#ifndef DART_COMMON_DETAIL_MEMORYALLOCATOR_HPP_
#define DART_COMMON_DETAIL_MEMORYALLOCATOR_HPP_
 
#include "dart/common/MemoryAllocator.hpp"
 
namespace dart::common {
 
//==============================================================================
template <typename T>
T* MemoryAllocator::allocateAs(size_t n) noexcept
{
  return static_cast<T*>(allocate(n * sizeof(T)));
}
 
//==============================================================================
template <typename T, typename... Args>
T* MemoryAllocator::construct(Args&&... args) noexcept
{
  // Allocate new memory for a new object (without calling the constructor)
  void* object = allocate(sizeof(T));
  if (!object)
  {
    return nullptr;
  }
 
  // Call constructor. Return nullptr if failed.
  try
  {
    new (object) T(std::forward<Args>(args)...);
  }
  catch (...)
  {
    deallocate(object, sizeof(T));
    return nullptr;
  }
 
  return reinterpret_cast<T*>(object);
}
 
//==============================================================================
template <typename T, typename... Args>
T* MemoryAllocator::constructAt(void* pointer, Args&&... args)
{
  return ::new (const_cast<void*>(static_cast<const volatile void*>(pointer)))
      T(std::forward<Args>(args)...);
}
 
//==============================================================================
template <typename T, typename... Args>
T* MemoryAllocator::constructAt(T* pointer, Args&&... args)
{
  return ::new (const_cast<void*>(static_cast<const volatile void*>(pointer)))
      T(std::forward<Args>(args)...);
}
 
//==============================================================================
template <typename T>
void MemoryAllocator::destroy(T* object) noexcept
{
  if (!object)
  {
    return;
  }
  object->~T();
  deallocate(object, sizeof(T));
}
 
} // namespace dart::common
 
#endif // DART_COMMON_DETAIL_MEMORYALLOCATOR_HPP_