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 {

struct Ternary via import std.typecons : Ternary;;

nothrow @nogc pure @safe

enum uint alignment;

void[] allocate(size_t );

void[] alignedAllocate(size_t , uint );

void[] allocateAll();

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

bool reallocate(void[] b, size_t );

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

Ternary owns(void[] );

Ternary resolveInternalPointer(void* , void[] );

bool deallocate(void[] b);

bool deallocateAll();

Ternary empty();

nothrow @nogc pure @safe static shared

NullAllocator instance;

}

Members

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.

Static variables

instance NullAllocator instance;: Returns the shared global instance of the NullAllocator.

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.

NullAllocator

Members

Functions

Static variables

Variables

Meta

Source