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ExReleaseResourceAndLeaveCriticalRegion function (wdm.h)

  • Article

The ExReleaseResourceAndLeaveCriticalRegion routine first releases the specified resource, and then leaves the critical region.

Syntax

void ExReleaseResourceAndLeaveCriticalRegion(
  PERESOURCE Resource
);

Parameters

Resource

[in, out] A pointer to the resource to release. This parameter should be the same ERESOURCE pointer that the caller supplied as a parameter in the previous call to the ExEnterCriticalRegionAndAcquireResourceExclusive routine that acquired the resource.

Return value

None

Remarks

After a driver calls the ExEnterCriticalRegionAndAcquireResourceExclusive method to enter a critical region and acquire a resource for exclusive access, the driver must call ExReleaseResourceAndLeaveCriticalRegion to release the resource and exit the critical region.

For more information about using an ERESOURCE structure to synchronize exclusive access to a resource, see Introduction to ERESOURCE Routines. For more information about entering and leaving a critical region, see Critical Regions and Guarded Regions.

Requirements

Requirement Value
Minimum supported client Windows Vista
Minimum supported server Windows Server 2003 SP1
Header wdm.h
IRQL <= APC_LEVEL
DDI compliance rules CriticalRegions(wdm), HwStorPortProhibitedDDIs(storport)

See also

ERESOURCE

ExEnterCriticalRegionAndAcquireResourceExclusive