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std.experimental.allocator.mallocator

struct Mallocator;
The C heap allocator.
Examples:
auto buffer = Mallocator.instance.allocate(1024 * 1024 * 4);
scope(exit) Mallocator.instance.deallocate(buffer);
//...
enum uint alignment;
The alignment is a static constant equal to platformAlignment, which ensures proper alignment for any D data type.
shared @trusted void[] allocate(size_t bytes);
shared @system bool deallocate(void[] b);
shared @system bool reallocate(ref void[] b, size_t s);
Standard allocator methods per the semantics defined above. The deallocate and reallocate methods are @system because they may move memory around, leaving dangling pointers in user code. Somewhat paradoxically, malloc is @safe but that's only useful to safe programs that can afford to leak memory allocated.
static Mallocator instance;
Returns the global instance of this allocator type. The C heap allocator is thread-safe, therefore all of its methods and it itself are shared.
struct AlignedMallocator;
Aligned allocator using OS-specific primitives, under a uniform API.
Examples:
auto buffer = AlignedMallocator.instance.alignedAllocate(1024 * 1024 * 4,
    128);
scope(exit) AlignedMallocator.instance.deallocate(buffer);
//...
enum uint alignment;
The default alignment is platformAlignment.
shared @trusted void[] allocate(size_t bytes);
Forwards to alignedAllocate(bytes, platformAlignment).
shared @trusted void[] alignedAllocate(size_t bytes, uint a);
Uses posix_memalign on Posix and _aligned_malloc on Windows.
shared @system bool deallocate(void[] b);
Calls free(b.ptr) on Posix and _aligned_free(b.ptr) on Windows.
shared @system bool reallocate(ref void[] b, size_t newSize);
On Posix, forwards to realloc. On Windows, forwards to alignedReallocate(b, newSize, platformAlignment).
static AlignedMallocator instance;
Returns the global instance of this allocator type. The C heap allocator is thread-safe, therefore all of its methods and instance itself are shared.