PoolManager.h

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#pragma once

//                   Definition                 //

#define MaximumRequestsQueueDepth   300
#define NumberOfPreAllocatedBuffers 10

//                   Structures                 //

typedef struct _POOL_TABLE
{
    UINT64                    Address; // Should be the start of the list as we compute it as the start address
    SIZE_T                    Size;
    POOL_ALLOCATION_INTENTION Intention;
    LIST_ENTRY                PoolsList;
    BOOLEAN                   IsBusy;
    BOOLEAN                   ShouldBeFreed;
    BOOLEAN                   AlreadyFreed;
 
} POOL_TABLE, *PPOOL_TABLE;

typedef struct _REQUEST_NEW_ALLOCATION
{
    SIZE_T                    Size;
    UINT32                    Count;
    POOL_ALLOCATION_INTENTION Intention;
 
} REQUEST_NEW_ALLOCATION, *PREQUEST_NEW_ALLOCATION;

//                   Variables                  //

REQUEST_NEW_ALLOCATION * g_RequestNewAllocation;

volatile LONG LockForRequestAllocation;

volatile LONG LockForReadingPool;

BOOLEAN g_PoolManagerInitialized;

BOOLEAN g_IsNewRequestForAllocationReceived;

BOOLEAN g_IsNewRequestForDeAllocation;

LIST_ENTRY g_ListOfAllocatedPoolsHead;

//                   Functions                  //
 
// ----------------------------------------------------------------------------
// Private Interfaces
//

static BOOLEAN
PlmgrAllocateRequestNewAllocation(SIZE_T NumberOfBytes);
 
static VOID PlmgrFreeRequestNewAllocation(VOID);
 
// ----------------------------------------------------------------------------
// Public Interfaces
//
 
BOOLEAN
PoolManagerInitialize();
 
VOID
PoolManagerUninitialize();
 
VOID
PoolManagerShowPreAllocatedPools();
 
BOOLEAN
PoolManagerCheckAndPerformAllocationAndDeallocation();
 
BOOLEAN
PoolManagerRequestAllocation(SIZE_T Size, UINT32 Count, POOL_ALLOCATION_INTENTION Intention);
 
UINT64
PoolManagerRequestPool(POOL_ALLOCATION_INTENTION Intention, BOOLEAN RequestNewPool, UINT32 Size);
 
BOOLEAN
PoolManagerFreePool(UINT64 AddressToFree);