KbdSynch
From EDM2
This call synchronizes access from a keyboard subsystem to the keyboard device driver.
Syntax
KbdSynch (IOWait)
Parameters
- IOWait (USHORT) - input
- Wait for the bond. Values are:
- 0 - Indicates the requestor does not wait for access to the device driver.
- 1 - Indicates the requestor waits for access to the device driver.
Return Code
- 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.
Bindings
C
#define INCL_KBD USHORT rc = KbdSynch(IOWait); USHORT IOWait; /* Indicate if wait */ USHORT rc; /* return code */
MASM
EXTRN KbdSynch:FAR INCL_KBD EQU 1 PUSH WORD IOWait ;Indicate if wait CALL KbdSynch Returns WORD