LOCK_OPERATION enumeration

The LOCK_OPERATION enumeration specifies the type of access that is appropriate for a type of I/O operation.

Syntax


typedef enum  { 
  IoReadAccess,
  IoWriteAccess,
  IoModifyAccess
} LOCK_OPERATION;

Constants

IoReadAccess

This value indicates that a driver can examine the contents of a buffer but cannot change the contents.

IoWriteAccess

This value indicates that a driver can examine and change the contents of a buffer.

IoModifyAccess

This value indicates that a driver can examine and change the contents of a buffer.

Requirements

Version

Available in Windows 2000 and later versions of the Windows operating system.

Header

Wdm.h (include Wdm.h)

See also

FltDecodeParameters
MmProbeAndLockPages

 

 

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