NullAllocator

NullAllocator is an emphatically empty implementation of the allocator interface. Although it has no direct use, it is useful as a "terminator" in composite allocators.

struct NullAllocator {

import stdx.allocator.internal : Ternary;;

enum uint alignment;

static void[] allocate(size_t );

static void[] alignedAllocate(size_t , uint );

static void[] allocateAll();

static bool expand(void[] b, size_t s);

static bool reallocate(void[] b, size_t );

static bool alignedReallocate(void[] b, size_t , uint );

static Ternary owns(void[] );

static Ternary resolveInternalPointer(void* , void[] );

static bool deallocate(void[] b);

static bool deallocateAll();

static Ternary empty();

enum NullAllocator instance;

}

Members

Static functions

alignedAllocate void[] alignedAllocate(size_t , uint ): Always returns null.
alignedReallocate bool alignedReallocate(void[] b, size_t , uint ): These methods return false. Precondition: b is null. This is because there is no other possible legitimate input.
allocate void[] allocate(size_t ): Always returns null.
allocateAll void[] allocateAll(): Always returns null.
deallocate bool deallocate(void[] b): No-op. Precondition: b is null
deallocateAll bool deallocateAll(): No-op.
empty Ternary empty(): Returns Ternary.yes.
expand bool expand(void[] b, size_t s): These methods return false. Precondition: b is null. This is because there is no other possible legitimate input.
owns Ternary owns(void[] ): Returns Ternary.no.
reallocate bool reallocate(void[] b, size_t ): These methods return false. Precondition: b is null. This is because there is no other possible legitimate input.
resolveInternalPointer Ternary resolveInternalPointer(void* , void[] ): Returns Ternary.no.

Variables

alignment enum uint alignment;: NullAllocator advertises a relatively large alignment equal to 64 KB. This is because NullAllocator never actually needs to honor this alignment and because composite allocators using NullAllocator shouldn't be unnecessarily constrained.
instance enum NullAllocator instance;: Returns the static global instance of the NullAllocator.

NullAllocator

Members

Static functions

Variables

Meta

Source