VioSavRedrawUndo

This call allows one thread within a process to cancel a VioSavRedrawWait issued by another thread within the same process.

VioSavRedrawUndo (OwnerIndic, KillIndic, VioHandle)

• OwnerIndic (USHORT) - input: Indicates whether the thread issuing VioSavRedrawUndo wants ownership of VioSavRedrawWait to be reserved for its process.
  • 0 Reserve ownership
  • 1 Give up ownership.
• KillIndic (USHORT) - input: Indicates whether the thread with the outstanding VioSavRedrawWait should be returned an error code or be terminated.
  • 0 Return error code
  • 1 Terminate thread.
• VioHandle (HVIO) - input : Reserved word of 0s.

rc (USHORT) - return

Return code descriptions are:

• 0 NO_ERROR
• 421 ERROR_VIO_INVALID_PARMS
• 422 ERROR_VIO_FUNCTION_OWNED
• 428 ERROR_VIO_NO_SAVE_RESTORE_THD
• 430 ERROR_VIO_ILLEGAL_DURING_POPUP
• 465 ERROR_VIO_DETACHED
• 494 ERROR_VIO_EXTENDED_SG

The issuing thread can reserve ownership of VioSavRedrawWait for its process or give it up. The thread whose VioSavRedrawWait was cancelled is optionally terminated. VioSavRedrawUndo may be issued only by a thread within the same process that owns VioSavRedrawWait.

#define INCL_VIO
 
USHORT  rc = VioSavRedrawUndo(OwnerIndic, KillIndic, VioHandle);
 
USHORT  OwnerIndic;    /* Ownership indicator */
USHORT  KillIndic;     /* Terminate indicator */
HVIO    VioHandle;     /* Video handle */
 
USHORT  rc;            /* return code */

EXTRN  VioSavRedrawUndo:FAR
INCL_VIO            EQU 1
 
PUSH   WORD    OwnerIndic    ;Ownership indicator
PUSH   WORD    KillIndic     ;Terminate indicator
PUSH   WORD    VioHandle     ;Video handle
CALL   VioSavRedrawUndo
 
Returns WORD

Text based on http://www.edm2.com/index.php/VioSavRedrawUndo_(OS/2_1.x)