freebsd-dev/gnu/usr.bin/gdb/mmalloc/keys.c
Paul Richards ea8c7ac7d0 GDB-4.12 from ports with support for shlibs but not the kernel.
This is a greatly pared down version of the full gdb-4.12, all the
config stuff has been removed and the supporting libraries have
been stripped to a minimum. This is a 1.1.5 only port, I'll do a
more complete port for 2.0 which will have all the config stuff
and will install the gnu support libraries as system libraries like
we do for readline.

There wasn't much point for 1.1.5 since only gdb would use them so I
went for saving space instead. For 2.0 I'll config all the
other gnu tools to use them as well.
1994-06-10 13:42:18 +00:00

67 lines
2.1 KiB
C

/* Access for application keys in mmap'd malloc managed region.
Copyright 1992 Free Software Foundation, Inc.
Contributed by Fred Fish at Cygnus Support. fnf@cygnus.com
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/* This module provides access to some keys that the application can use to
provide persistent access to locations in the mapped memory section.
The intent is that these keys are to be used sparingly as sort of
persistent global variables which the application can use to reinitialize
access to data in the mapped region.
For the moment, these keys are simply stored in the malloc descriptor
itself, in an array of fixed length. This should be fixed so that there
can be an unlimited number of keys, possibly using a multilevel access
scheme of some sort. */
#include "mmalloc.h"
int
mmalloc_setkey (md, keynum, key)
PTR md;
int keynum;
PTR key;
{
struct mdesc *mdp = (struct mdesc *) md;
int result = 0;
if ((mdp != NULL) && (keynum >= 0) && (keynum < MMALLOC_KEYS))
{
mdp -> keys [keynum] = key;
result++;
}
return (result);
}
PTR
mmalloc_getkey (md, keynum)
PTR md;
int keynum;
{
struct mdesc *mdp = (struct mdesc *) md;
PTR keyval = NULL;
if ((mdp != NULL) && (keynum >= 0) && (keynum < MMALLOC_KEYS))
{
keyval = mdp -> keys [keynum];
}
return (keyval);
}