MouSynch

Bindings:  C, MASM 

This call provides synchronous access for a mouse subsystem to the mouse 
device driver. 

 MouSynch    (IOWait) 
 

 IOWait (USHORT) - input 
    Wait for access. The flag Word is defined as follows: 

    Value     Definition 
    0         Control immediately returned to requestor. 
    1         Requestor waits until mouse device driver is free. 

 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.