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From: "Wiktor S. (wswiktorSP AT Mpoczta DOT fm) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: how to unlock locked memory
Date: Wed, 16 Mar 2016 15:15:30 +0100
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

>> Thanks. Weird that there is no _go32_dpmi_unlock_code/data.

> You can use '__dpmi_unlock_linear_region()'.

Yes, I've modified _go32_dpmi_lock_data to use unlock_linear_region, like 
this:

==============
int _go32_dpmi_unlock_data( void *lockaddr, unsigned long locksize )
    {
    unsigned long baseaddr;
    __dpmi_meminfo memregion;

    if( __dpmi_get_segment_base_address( _go32_my_ds(), &baseaddr) == -1 ) 
return( -1 );

    memset( &memregion, 0, sizeof(memregion) );

    memregion.address = baseaddr + (unsigned long) lockaddr;
    memregion.size    = locksize;

    if( __dpmi_unlock_linear_region( &memregion ) == -1 ) return( -1 );

    return( 0 );
    }


int _go32_dpmi_unlock_code( void *lockaddr, unsigned long locksize )
    {
    unsigned long baseaddr;
    __dpmi_meminfo memregion;

    if( __dpmi_get_segment_base_address( _go32_my_cs(), &baseaddr) == -1 ) 
return( -1 );

    memset( &memregion, 0, sizeof(memregion) );

    memregion.address = baseaddr + (unsigned long) lockaddr;
    memregion.size    = locksize;

    if( __dpmi_unlock_linear_region( &memregion ) == -1 ) return( -1 );

    return( 0 );
    }

==============

Seems to work, but it's a bit inconvenient because the project is in Ada, 
and this is now the only .c file.

Any reason why it's not in libc?


-- 
Wiktor S.