ExFreePool

ExFreePool

The ExFreePool routine deallocates a block of pool memory.

VOID
ExFreePool(
IN PVOID P
    );

Parameters

P

Specifies the address of the block of pool memory being deallocated.

Return Value

None

Comments

This routine releases memory allocated by ExAllocatePool , ExAllocatePoolWithTag , ExAllocatePoolWithQuota , or ExAllocatePoolWithQuotaTag . The memory block must not be accessed after it is freed.

Drivers can also use the ExFreePoolWithTag routine to free buffers allocated by ExAllocatePoolWithTag and ExAllocatePoolWithQuotaTag .

Callers of ExFreePool must be running at IRQL <= DISPATCH_LEVEL. A caller at DISPATCH_LEVEL must have specified a NonPaged Xxx PoolType when the memory was allocated. Otherwise, the caller must be running at IRQL <= APC_LEVEL.

Requirements

IRQL: <= DISPATCH_LEVEL (see Comments section)

Headers: Declared in Wdm.h . Include Wdm.h , Ntddk.h , or Ntifs.h .