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From: Rod Pemberton <NoHaveNotOne AT bcczxcfre DOT cmm>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: how to unlock locked memory
Date: Wed, 16 Mar 2016 00:03:17 -0400
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On Thu, 10 Mar 2016 17:38:52 +0100
"Wiktor S." <wswiktorSP AT Mpoczta DOT fm> wrote:

> Is there a proper way to unlock memory locked with
> _go32_dpmi_lock_code and _go32_dpmi_lock_data?
> 
> 

Are you still here?
I'm surprised no one has responded to this yet ...


_go32_dpmi_lock_code() and _go32_dpmi_lock_dat() are
both defined in src/libc/go32/gopint.c .

_go32_dpmi_lock_code() and _go32_dpmi_lock_data()
both call __dpmi_lock_linear_region() to lock code
and data.  Both routines call __dpmi_get_segment_base_address()
with either _go32_my_cs() or _go32_my_ds(), respectively,
to compute the region's address and size to be locked.

So, you should be able to use __dpmi_unlock_linear_region()
by passing the same address and size as they were computed
in either _go32_dpmi_lock_code() or _go32_dpmi_lock_data().
Look at the code in gopint.c to see how this is done.


Rod Pemberton