KbdSynch

Bindings: C, MASM

This call synchronizes access from a keyboard subsystem to the keyboard device driver.

KbdSynch (IOWait)

IOWait (USHORT) - input Wait for the bond. Values are:

Value Definition
0 Indicates the requestor does not wait for access to the device driver.
1 Indicates the requestor waits for access to the device driver.

rc (USHORT) - return Return code descriptions are:

0 NO_ERROR
121 ERROR_SEM_TIMEOUT

Remarks

KbdSynch blocks all other threads within a session until return from the subsystem to the router. To ensure proper synchronization, KbdSynch should be issued by a keyboard subsystem if it intends to issue a DosDevIOCtl or access dynamically shared data. KbdSynch does not protect globally shared data from threads in other sessions.

C bindings

#define INCL_KBD
 
USHORT  rc = KbdSynch(IOWait);
 
USHORT           IOWait;        /* Indicate if wait */
 
USHORT           rc;            /* return code */

MASM bindings

EXTRN  KbdSynch:FAR
INCL_KBD            EQU 1
 
PUSH   WORD    IOWait        ;Indicate if wait
CALL   KbdSynch
 
Returns WORD