alpar@1: /* glpenv02.c (thread local storage) */
alpar@1: 
alpar@1: /***********************************************************************
alpar@1: *  This code is part of GLPK (GNU Linear Programming Kit).
alpar@1: *
alpar@1: *  Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
alpar@1: *  2009, 2010 Andrew Makhorin, Department for Applied Informatics,
alpar@1: *  Moscow Aviation Institute, Moscow, Russia. All rights reserved.
alpar@1: *  E-mail: <mao@gnu.org>.
alpar@1: *
alpar@1: *  GLPK is free software: you can redistribute it and/or modify it
alpar@1: *  under the terms of the GNU General Public License as published by
alpar@1: *  the Free Software Foundation, either version 3 of the License, or
alpar@1: *  (at your option) any later version.
alpar@1: *
alpar@1: *  GLPK is distributed in the hope that it will be useful, but WITHOUT
alpar@1: *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
alpar@1: *  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
alpar@1: *  License for more details.
alpar@1: *
alpar@1: *  You should have received a copy of the GNU General Public License
alpar@1: *  along with GLPK. If not, see <http://www.gnu.org/licenses/>.
alpar@1: ***********************************************************************/
alpar@1: 
alpar@1: #include "glpenv.h"
alpar@1: 
alpar@1: static void *tls = NULL;
alpar@1: /* in a re-entrant version of the package this variable must be placed
alpar@1:    in the Thread Local Storage (TLS) */
alpar@1: 
alpar@1: /***********************************************************************
alpar@1: *  NAME
alpar@1: *
alpar@1: *  tls_set_ptr - store global pointer in TLS
alpar@1: *
alpar@1: *  SYNOPSIS
alpar@1: *
alpar@1: *  #include "glpenv.h"
alpar@1: *  void tls_set_ptr(void *ptr);
alpar@1: *
alpar@1: *  DESCRIPTION
alpar@1: *
alpar@1: *  The routine tls_set_ptr stores a pointer specified by the parameter
alpar@1: *  ptr in the Thread Local Storage (TLS). */
alpar@1: 
alpar@1: void tls_set_ptr(void *ptr)
alpar@1: {     tls = ptr;
alpar@1:       return;
alpar@1: }
alpar@1: 
alpar@1: /***********************************************************************
alpar@1: *  NAME
alpar@1: *
alpar@1: *  tls_get_ptr - retrieve global pointer from TLS
alpar@1: *
alpar@1: *  SYNOPSIS
alpar@1: *
alpar@1: *  #include "glpenv.h"
alpar@1: *  void *tls_get_ptr(void);
alpar@1: *
alpar@1: *  RETURNS
alpar@1: *
alpar@1: *  The routine tls_get_ptr returns a pointer previously stored by the
alpar@1: *  routine tls_set_ptr. If the latter has not been called yet, NULL is
alpar@1: *  returned. */
alpar@1: 
alpar@1: void *tls_get_ptr(void)
alpar@1: {     void *ptr;
alpar@1:       ptr = tls;
alpar@1:       return ptr;
alpar@1: }
alpar@1: 
alpar@1: /* eof */