thrust::mr::disjoint_synchronized_pool_resource

Defined in thrust/mr/disjoint_sync_pool.h

template<typename Upstream, typename Bookkeeper>
struct disjoint_synchronized_pool_resource : public thrust::mr::memory_resource<Upstream::pointer>

A mutex-synchronized version of disjoint_unsynchronized_pool_resource. Uses std::mutex, and therefore requires C++11.

Template Parameters

  • Upstream – the type of memory resources that will be used for allocating memory blocks to be handed off to the user

  • Bookkeeper – the type of memory resources that will be used for allocating bookkeeping memory

Public Types

using unsync_pool = disjoint_unsynchronized_pool_resource<Upstream, Bookkeeper>
using lock_t = std::lock_guard<std::mutex>
using void_ptr = typename Upstream::pointer
using pointer = Upstream::pointer

Alias for the template parameter.

Public Functions

inline disjoint_synchronized_pool_resource(Upstream *upstream, Bookkeeper *bookkeeper, pool_options options = get_default_options())

Constructor.

Parameters

  • upstream – the upstream memory resource for allocations

  • bookkeeper – the upstream memory resource for bookkeeping

  • options – pool options to use

inline disjoint_synchronized_pool_resource(pool_options options = get_default_options())

Constructor. Upstream and bookkeeping resources are obtained by calling get_global_resource for their types.

Parameters

options – pool options to use

inline void release()

Releases all held memory to upstream.

inline virtual void_ptr 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(void_ptr p, std::size_t n, std::size_t alignment = THRUST_MR_DEFAULT_ALIGNMENT) override
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) noexcept

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.

virtual void do_deallocate(pointer p, std::size_t bytes, std::size_t alignment) = 0

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 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.

Public Static Functions

static inline pool_options get_default_options()

Get the default options for a disjoint pool. These are meant to be a sensible set of values for many use cases, and as such, may be tuned in the future. This function is exposed so that creating a set of options that are just a slight departure from the defaults is easy.