thrust::device_ptr_memory_resource

Defined in thrust/device_allocator.h

template<typename Upstream>
class device_ptr_memory_resource : public thrust::mr::memory_resource<device_ptr<void>>

Memory resource adaptor that turns any memory resource that returns a fancy with the same tag as device_ptr, and adapts it to a resource that returns a device_ptr.

Public Types

using pointer = device_ptr<void>

Alias for the template parameter.

Public Functions

inline device_ptr_memory_resource()

Initialize the adaptor with the global instance of the upstream resource. Obtains the global instance by calling get_global_resource.

inline device_ptr_memory_resource(Upstream *upstream)

Initialize the adaptor with an upstream resource.

Parameters

upstream – the upstream memory resource to adapt.

inline virtual pointer do_allocate(std::size_t bytes, std::size_t alignment = THRUST_MR_DEFAULT_ALIGNMENT) override

Allocates memory of size at least bytes and alignment at least alignment.

Parameters

• bytes – size, in bytes, that is requested from this allocation

• alignment – alignment that is requested from this allocation

Throws

thrust::bad_alloc – when no memory with requested size and alignment can be allocated.

Returns

A pointer to void to the newly allocated memory.

inline virtual void do_deallocate(pointer p, std::size_t bytes, std::size_t alignment) override

Deallocates memory pointed to by p.

Parameters

• p – pointer to be deallocated

• bytes – the size of the allocation. This must be equivalent to the value of bytes that was passed to the allocation function that returned p.

• alignment – the size of the allocation. This must be equivalent to the value of alignment that was passed to the allocation function that returned p.

inline pointer allocate(std::size_t bytes, std::size_t alignment = THRUST_MR_DEFAULT_ALIGNMENT)

Allocates memory of size at least bytes and alignment at least alignment.

Parameters

• bytes – size, in bytes, that is requested from this allocation

• alignment – alignment that is requested from this allocation

Throws

thrust::bad_alloc – when no memory with requested size and alignment can be allocated.

Returns

A pointer to void to the newly allocated memory.

inline void deallocate(pointer p, std::size_t bytes, std::size_t alignment = THRUST_MR_DEFAULT_ALIGNMENT)

Deallocates memory pointed to by p.

Parameters

• p – pointer to be deallocated

• bytes – the size of the allocation. This must be equivalent to the value of bytes that was passed to the allocation function that returned p.

• alignment – the alignment of the allocation. This must be equivalent to the value of alignment that was passed to the allocation function that returned p.

inline bool is_equal(const memory_resource &other) const noexcept

Compares this resource to the other one. The default implementation uses identity comparison, which is often the right thing to do and doesn’t require RTTI involvement.

Parameters

other – the other resource to compare this resource to

Returns

whether the two resources are equivalent.

inline virtual bool do_is_equal(const memory_resource &other) const noexcept

Compares this resource to the other one. The default implementation uses identity comparison, which is often the right thing to do and doesn’t require RTTI involvement.

Parameters

other – the other resource to compare this resource to

Returns

whether the two resources are equivalent.