MFSH_LOCK - Lock a segment

Purpose

Lock a segment in place in physical memory.

Calling Sequence

int far pascal MFSH_LOCK(usSel, pulHandle) unsigned short usSel; unsigned long far * pulHandle;

Where

usSel is the selector of the segment to be locked.

pulHandle is a pointer to a double word which is filled in by the helper with the lock handle.

Returns

If no error is detected, a zero error code is returned. If an error is detected, one of the following error codes is returned:

ERROR_PROTECTION_VIOLATION – the supplied address or selector is invalid.

Remarks

This helper is for use by a mini-FSD with an imbedded device driver. It is the same as the standard device driver LOCK helper with the following assumptions: The lock is defined to be short term and will block until the segment is loaded.