DevHlp_AcquireSpinLock

Description

Acquire a subsystem spinlock.

This function obtains ownership of a subsystem spinlock.

Spinlock handle.

Return code.

 ;       dh_AcquireSpinLock - Acquire a subsystem spinlock ;
 ;       Obtains ownership of a subsystem spinlock. Used by device drivers.
 ;
 ;       ENTRY:  AX:BX = spinlock handle
 ;
 ;       EXIT:   None
 ;
 ;       USES:   Flags
 ;

   hSpinLock       dd      ?            ; 16:16

   MOV     AX,hSpinLockHighWord         ; high word of handle
   MOV     BX,hSpinLockLowWord          ; low word of handle
   MOV     DL,DevHlp_AcquireSpinLock    ;
   CALL    DevHlp
   JC      Error