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The IoGetRemainingStackSize routine returns the current amount of available kernel-mode stack space.
Syntax
ULONG_PTR IoGetRemainingStackSize();
Return value
IoGetRemainingStackSize returns the number of bytes of stack space in the current thread context.
Remarks
Highest-level drivers, such as file systems, can call this routine, particularly drivers that use recursive code paths. Such a driver would call IoGetRemainingStackSize before launching a recursion to determine whether it should continue processing on an alternate code path.
For Windows Server 2003 Service Pack 1 (SP1) and later versions of Windows, callers of IoGetRemainingStackSize can be running at any IRQL. For earlier versions of Windows, the caller must be running at IRQL <= APC_LEVEL.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available starting with Windows 2000. |
| Target Platform | Desktop |
| Header | wdm.h (include Wdm.h, Ntddk.h, Ntifs.h) |
| IRQL | See Remarks section. |