FreeBSD: add file descriptor tracking for _umtx_op
[valgrind.git] / coregrind / m_scheduler / priv_sema.h
blobc09b2ef9a7cf0ed869b75d854f2c1b1d6493b380
2 /*--------------------------------------------------------------------*/
3 /*--- Private scheduler header. priv_sema.h ---*/
4 /*--------------------------------------------------------------------*/
6 /*
7 This file is part of Valgrind, a dynamic binary instrumentation
8 framework.
10 Copyright (C) 2000-2017 Julian Seward
11 jseward@acm.org
13 This program is free software; you can redistribute it and/or
14 modify it under the terms of the GNU General Public License as
15 published by the Free Software Foundation; either version 2 of the
16 License, or (at your option) any later version.
18 This program is distributed in the hope that it will be useful, but
19 WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, see <http://www.gnu.org/licenses/>.
26 The GNU General Public License is contained in the file COPYING.
29 #ifndef __PRIV_SEMA_H
30 #define __PRIV_SEMA_H
32 #include "pub_core_basics.h" // Bool
34 /* Not really a semaphore, but use a pipe for a token-passing scheme */
35 typedef struct {
36 Int pipe[2];
37 Int owner_lwpid; /* who currently has it */
38 Bool held_as_LL; /* if held, True == held by a _LL call */
39 } vg_sema_t;
41 // Nb: this may be OS-specific, but let's not factor it out until we
42 // implement an OS port for which this isn't ok.
43 void ML_(sema_init) ( vg_sema_t *sema );
44 void ML_(sema_deinit) ( vg_sema_t *sema );
45 void ML_(sema_down) ( vg_sema_t *sema, Bool as_LL );
46 void ML_(sema_up) ( vg_sema_t *sema, Bool as_LL );
48 #endif // __PRIV_SEMA_H
50 /*--------------------------------------------------------------------*/
51 /*--- end ---*/
52 /*--------------------------------------------------------------------*/