default_allocator.h

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 //*****************************************************************************


 // Copyright 1986, 2014 NVIDIA Corporation. All rights reserved.


 //*****************************************************************************


 //*****************************************************************************


 

 #ifndef MI_BASE_DEFAULT_ALLOCATOR_H


 #define MI_BASE_DEFAULT_ALLOCATOR_H


 


 #include <mi/base/types.h>


 #include <mi/base/iallocator.h>


 #include <mi/base/interface_implement.h>


 #include <new>


 

 namespace mi

 {

 

 namespace base

 {

 

 class Default_allocator : public Interface_implement_singleton<IAllocator>

 {

     Default_allocator() {}

     Default_allocator( const Default_allocator&) {}

 public:

 

     virtual void* malloc(Size size) {

         // Use non-throwing new call, which may return NULL instead


         return ::new(std::nothrow) char[size];

     }

 

     virtual void free(void* memory) {

         ::delete[] reinterpret_cast<char*>(memory);

     }

 

     static IAllocator* get_instance() {

         // We claim that this is multithreading safe because the


         // Default_allocator has an empty default constructor.


         // Whatever number of threads gets into the constructor, there


         // should be no way to screw up the initialization in each


         // thread. The optimizer might even be able to eliminate all


         // code here.


         static Default_allocator allocator;

         return &allocator;

     }

 };

  // end group mi_base_iallocator


 

 } // namespace base


 } // namespace mi


 

 #endif // MI_BASE_DEFAULT_ALLOCATOR_H