MouSynch
From EDM2
This call provides synchronous access for a mouse subsystem to the mouse device driver.
Syntax
MouSynch (IOWait)
Parameters
- IOWait (USHORT) - input
- Wait for access. The flag Word is defined as follows:
- 0 - Control immediately returned to requestor.
- 1 - Requestor waits until mouse device driver is free.
Return Code
- rc (USHORT) - return
- Return code descriptions are:
- 0 NO_ERROR
- 121 ERROR_SEM_TIMEOUT
Remarks
MouSynch blocks all other threads within a session until the semaphore clears (returns from the subsystem to the router). To ensure proper synchronization, MouSynch should be issued by a mouse subsystem if it intends to access dynamically modifiable shared data for each session or if it intends to issue a DosDevIOCtl. MouSynch does not protect globally shared data from threads in other sessions.
Bindings
C
#define INCL_MOU USHORT rc = MouSynch(IOWait); USHORT IOWait; /* Indicate wait/no wait */ USHORT rc; /* return code */
MASM
EXTRN MouSynch:FAR INCL_MOU EQU 1 PUSH WORD IOWait ;Indicate wait/no wait CALL MouSynch Returns WORD