| /* 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., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, 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 "mmprivate.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); |
| } |