/* sema.h -  definitions for semaphores
 *	Copyright (C) 2001 Werner Koch (dd9jn)
 *      Copyright (C) 2001 g10 Code GmbH
 *
 * This file is part of GPGME.
 *
 * GPGME is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GPGME 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#ifndef SEMA_H
#define SEMA_H

struct critsect_s {
    const char *name;
    void *private;
};

#define DEFINE_GLOBAL_LOCK(name) \
        struct critsect_s name = { #name, NULL }
#define DEFINE_STATIC_LOCK(name) \
        static struct critsect_s name  = { #name, NULL }

#define DECLARE_LOCK(name)  struct critsect_s name
#define INIT_LOCK(a)  do { \
                      (a).name = #a; \
                      (a).private = NULL; \
                    } while (0)
#define DESTROY_LOCK(name) _gpgme_sema_cs_destroy (&(name))
                       

#define LOCK(name)  do { \
                         _gpgme_sema_cs_enter ( &(name) );\
                    } while (0)

#define UNLOCK(name)  do { \
                         _gpgme_sema_cs_leave ( &(name) );\
                    } while (0)


void _gpgme_sema_subsystem_init (void);
void _gpgme_sema_cs_enter ( struct critsect_s *s );
void _gpgme_sema_cs_leave ( struct critsect_s *s );
void _gpgme_sema_cs_destroy ( struct critsect_s *s );


#endif /* SEMA_H */