Inheritance diagram for Arcane::MachineShMemWinMemoryAllocator:

Collaboration diagram for Arcane::MachineShMemWinMemoryAllocator:

Public Member Functions
	MachineShMemWinMemoryAllocator (IParallelMng *pm)
bool	hasRealloc (MemoryAllocationArgs) const override
	Indicates whether the allocator supports realloc semantics.
AllocatedMemoryInfo	allocate (MemoryAllocationArgs, Int64 new_size) override
	Allocates memory for new_size bytes and returns the pointer.
AllocatedMemoryInfo	reallocate (MemoryAllocationArgs, AllocatedMemoryInfo current_ptr, Int64 new_size) override
	Reallocates memory for new_size bytes and returns the pointer.
void	deallocate (MemoryAllocationArgs, AllocatedMemoryInfo ptr) override
	Frees the memory whose base address is ptr.
Int64	adjustedCapacity (MemoryAllocationArgs, Int64 wanted_capacity, Int64) const override
	Adjusts the capacity based on the element size.
size_t	guaranteedAlignment (MemoryAllocationArgs) const override
	Value of the alignment guaranteed by the allocator.
bool	isCollective () const override
	Indicates whether calls to the allocator must be performed collectively.
Public Member Functions inherited from Arcane::IMemoryAllocator
virtual	~IMemoryAllocator ()=default
	Destroys the allocator.
virtual size_t	guarantedAlignment (MemoryAllocationArgs args) const
	Value of the alignment guaranteed by the allocator.
virtual void	notifyMemoryArgsChanged (MemoryAllocationArgs old_args, MemoryAllocationArgs new_args, AllocatedMemoryInfo ptr)
	Notifies of a change in instance-specific arguments.
virtual void	copyMemory (MemoryAllocationArgs args, AllocatedMemoryInfo destination, AllocatedMemoryInfo source)
	Copies memory between two regions.
virtual eMemoryResource	memoryResource () const
	Memory resource provided by the allocator.

Static Public Member Functions
static ConstArrayView< Int32 >	machineRanks (AllocatedMemoryInfo ptr)
static void	barrier (AllocatedMemoryInfo ptr)
static Span< std::byte >	segmentView (AllocatedMemoryInfo ptr)
static Span< std::byte >	segmentView (AllocatedMemoryInfo ptr, Int32 rank)

Static Private Member Functions
static MachineShMemWinBase *	_windowBase (AllocatedMemoryInfo ptr)

Private Attributes
IParallelMng *	m_pm

Detailed Description

Definition at line 35 of file MachineShMemWinMemoryAllocator.h.

Constructor & Destructor Documentation

◆ MachineShMemWinMemoryAllocator()

Arcane::MachineShMemWinMemoryAllocator::MachineShMemWinMemoryAllocator ( IParallelMng * pm )

explicit

Definition at line 35 of file MachineShMemWinMemoryAllocator.cc.

Member Function Documentation

◆ _windowBase()

MachineShMemWinBase * Arcane::MachineShMemWinMemoryAllocator::_windowBase ( AllocatedMemoryInfo ptr )

staticprivate

Definition at line 183 of file MachineShMemWinMemoryAllocator.cc.

◆ adjustedCapacity()

Int64 Arcane::MachineShMemWinMemoryAllocator::adjustedCapacity	(	MemoryAllocationArgs	args,
		Int64	wanted_capacity,
		Int64	element_size ) const

inlineoverridevirtual

Adjusts the capacity based on the element size.

This method is used to optionally modify the number of allocated elements based on their size. This allows, for example, aligned allocators to ensure that the number of elements allocated is a multiple of this alignment.

Implements Arcane::IMemoryAllocator.

Definition at line 49 of file MachineShMemWinMemoryAllocator.h.

◆ allocate()

AllocatedMemoryInfo Arcane::MachineShMemWinMemoryAllocator::allocate	(	MemoryAllocationArgs	args,
		Int64	new_size )

overridevirtual

Allocates memory for new_size bytes and returns the pointer.

The semantics are equivalent to malloc():

new_size can be zero, in which case the returned pointer is either null or a specific value
the returned pointer may be null if the memory could not be allocated.

Implements Arcane::IMemoryAllocator.

Definition at line 43 of file MachineShMemWinMemoryAllocator.cc.

References Arcane::MessagePassing::ReduceMax.

Referenced by reallocate().

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◆ barrier()

void Arcane::MachineShMemWinMemoryAllocator::barrier ( AllocatedMemoryInfo ptr )

static

Definition at line 152 of file MachineShMemWinMemoryAllocator.cc.

◆ deallocate()

void Arcane::MachineShMemWinMemoryAllocator::deallocate	(	MemoryAllocationArgs	args,
		AllocatedMemoryInfo	ptr )

overridevirtual

Frees the memory whose base address is ptr.

The pointer ptr must have been allocated via a call to allocate() or reallocate() on this instance.

The semantics of this method are equivalent to free(), and thus ptr may be null, in which case no operation is performed.

Implements Arcane::IMemoryAllocator.

Definition at line 119 of file MachineShMemWinMemoryAllocator.cc.

References Arcane::AllocatedMemoryInfo::baseAddress(), Arcane::SpanImpl< T, SizeType, Extent >::data(), Arcane::MachineShMemWinBase::segmentView(), Arcane::AllocatedMemoryInfo::size(), and Arcane::SpanImpl< T, SizeType, Extent >::size().

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◆ guaranteedAlignment()

size_t Arcane::MachineShMemWinMemoryAllocator::guaranteedAlignment ( MemoryAllocationArgs args ) const

inlineoverridevirtual

Value of the alignment guaranteed by the allocator.

This method ensures that an allocator has sufficient alignment for certain operations such as vectorization, for example.

If there is no guarantee, it returns 0.

Implements Arcane::IMemoryAllocator.

Definition at line 53 of file MachineShMemWinMemoryAllocator.h.

◆ hasRealloc()

bool Arcane::MachineShMemWinMemoryAllocator::hasRealloc ( MemoryAllocationArgs ) const

inlineoverridevirtual

Indicates whether the allocator supports realloc semantics.

Default C allocators (malloc/realloc/free) obviously support realloc, but this is not necessarily the case for specific allocators with memory alignment (such as posix_memalign).

Reimplemented from Arcane::IMemoryAllocator.

Definition at line 45 of file MachineShMemWinMemoryAllocator.h.