/*  __  __                          __  __                                       _
 * |  \/  |___ _ __  ___ _ _ _  _  |  \/  |__ _ _ _  __ _ __ _ ___ _ __  ___ _ _| |_
 * | |\/| / -_) '  \/ _ \ '_| || | | |\/| / _` | ' \/ _` / _` / -_) '  \/ -_) ' \  _|
 * |_|  |_\___|_|_|_\___/_|  \_, | |_|  |_\__,_|_||_\__,_\__, \___|_|_|_\___|_||_\__|
 *                           |__/                        |___/
 */

#include "Domito.Internal.h"


static PVOID NTAPI DomitoDefaultMalloc(size_t s)
{
#pragma warning(disable:4996)
    const PVOID mem = ExAllocatePoolWithTag(PagedPool, s, DOMITO_POOL_TAG);
    if (mem)
    {
        RtlZeroMemory(mem, s);
    }
    return mem;
#pragma warning(default:4996)
}

static void NTAPI DomitoDefaultFree(PVOID p)
{
    ExFreePoolWithTag(p, DOMITO_POOL_TAG);
}

DOMITO_MEMORY G_Memory = {
   DomitoDefaultMalloc,
   DomitoDefaultFree
};

void
DomitoGetOriginalMemoryFunctions(
    _Out_opt_ PFN_DOMITO_ALLOCATE_ROUTINE* Allocator,
    _Out_opt_ PFN_DOMITO_FREE_ROUTINE* Free
)
{
    if (Allocator)
    {
        *Allocator = DomitoDefaultMalloc;
    }

    if (Free)
    {
        *Free = DomitoDefaultFree;
    }
}

void
DomitoGetMemoryFunctions(
    _Out_opt_ PFN_DOMITO_ALLOCATE_ROUTINE* Allocator,
    _Out_opt_ PFN_DOMITO_FREE_ROUTINE* Free
)
{
    if (Allocator)
    {
        *Allocator = G_Memory.Allocate;
    }

    if (Free)
    {
        *Free = G_Memory.Free;
    }
}

void
DomitoSetMemoryFunctions(
    _In_opt_ PFN_DOMITO_ALLOCATE_ROUTINE Allocator,
    _In_opt_ PFN_DOMITO_FREE_ROUTINE Free
)
{
    if (Allocator)
    {
        G_Memory.Allocate = Allocator;
    }

    if (Free)
    {
        G_Memory.Free = Free;
    }
}