DosMonClose

This call terminates character device monitoring. All monitor buffers associated with this process are flushed and closed.

Syntax
DosMonClose (Handle)

Parameters

 * Handle (HMONITOR) - input: Device handle returned from a previous DosMonOpen call.

Return Code

 * rc (USHORT) - return: Return code descriptions are:
 * 0 - NO_ERROR
 * 381 - ERROR_MON_INVALID_HANDLE

Remarks
A single process may register one or more monitors with a character device using the same device handle returned from a previous DosMonOpen call. When DosMonClose is issued for a specific, opened device handle, all monitors for the current process registered with this handle terminate.

When DosMonClose is issued, the monitor loses access to the device data stream. Before issuing DosMonClose, monitor threads calling DosMonRead and DosMonWrite should be terminated. After DosMonClose has been called: Data segments containing monitor buffers should not be freed until after DosMonClose is called. If data segments containing monitor buffers are freed before DosMonClose is called, a GP fault occurs when DosMonClose is called and the process is terminated.
 * DosMonRead calls return an ERROR_MON_BUFFER_EMPTY return code.
 * DosMonWrite calls return an ERROR_NOT_ENOUGH_MEMORY return code.

For a detailed description of this call see the chapter "Character Device Monitors" in the IBM Operating System/2 Version 1.2 I/O Subsystems and Device Support Volume 1.

C
USHORT    rc = DosMonClose(Handle); HMONITOR  Handle;   /* Monitor handle */ USHORT    rc;       /* return code    */
 * 1) define INCL_DOSMONITORS

MASM
EXTRN DosMonClose:FAR INCL_DOSMONITORS   EQU 1 PUSH  WORD    Handle   ;Monitor handle CALL  DosMonClose Returns WORD