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From: billf@progress.COM (Bill Ferro)
Newsgroups: comp.windows.ms.programmer
Subject: Re: Windows 3 segment/selector problems (Tech. Quest.)
Keywords: windows-3 selectors 80286 80386
Message-ID: <1990Dec19.194631.22880@progress.com>
Date: 19 Dec 90 19:46:31 GMT
References: <2564@wn1.sci.kun.nl> <588@rodan.cs.utexas.edu>
Sender: news@progress.com (The News User)
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Organization: Progress Software Corp., Bedford, MA
Lines: 38
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nickel@cs.utexas.edu (Jody P. Nickel) writes:

>If you are only going to run in 386 enhanced mode the this will simplify
>your task immensely. After a GlobalAlloc, you can lock this memory and
>leave it locked until it is no longer needed. The far pointer you receive
>is a selector:0 pointer.

	This is also true for standard mode.  Malloc and Free code
examples follow:

char	*malloc(nbytes)
	WORD	nbytes;
{
	HANDLE h;

	if ((h=GlobalAlloc(GMEM_MOVEABLE,DWORD(nbytes))) == NULL)
		return ((char *)0);
	else
		return ((char *)GlobalLock(h));
}

void	free(ptr)
	char	*ptr;
{
	HANDLE h;

	h = LOWORD(GlobalHandle(HIWORD(ptr)));
	GlobalUnlock(h);
	GlobalFree(h);
	return;
}

-bf
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Bill Ferro			UUCP: mit-eddie!progress!billf
Progress Software Corp.		Internet: billf@progress.com
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