4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2001,2004 Develer S.r.l. (http://www.develer.com/)
30 * Copyright 1999,2000,2001 Bernardo Innocenti <bernie@develer.com>
34 * \brief Mutually exclusive semaphores.
35 * Shared locking not supported in this implementation.
39 * \author Bernardo Innocenti <bernie@develer.com>
44 *#* Revision 1.7 2006/07/19 12:56:27 bernie
45 *#* Convert to new Doxygen style.
47 *#* Revision 1.6 2005/11/04 16:20:02 bernie
48 *#* Fix reference to README.devlib in header.
50 *#* Revision 1.5 2005/04/11 19:10:28 bernie
51 *#* Include top-level headers from cfg/ subdir.
53 *#* Revision 1.4 2005/01/22 04:21:20 bernie
54 *#* Add handy typedef for struct Semaphore.
56 *#* Revision 1.3 2004/08/25 14:12:09 rasky
57 *#* Aggiornato il comment block dei log RCS
59 *#* Revision 1.2 2004/06/03 11:27:09 bernie
60 *#* Add dual-license information.
62 *#* Revision 1.1 2004/05/23 17:27:00 bernie
63 *#* Import kern/ subdirectory.
70 #include <cfg/compiler.h>
71 #include <mware/list.h>
77 typedef struct Semaphore
79 struct Process *owner;
85 * \name Process synchronization services
88 void sem_init(struct Semaphore *s);
89 bool sem_attempt(struct Semaphore *s);
90 void sem_obtain(struct Semaphore *s);
91 void sem_release(struct Semaphore *s);
94 #endif /* KERN_SEM_H */