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/*--------------------------------------------------------------------*/
/*--- Private scheduler header. priv_sema.h ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2017 Julian Seward
jseward@acm.org
This program 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.
This program 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, see <http://www.gnu.org/licenses/>.
The GNU General Public License is contained in the file COPYING.
*/
#ifndef __PRIV_SEMA_H
#define __PRIV_SEMA_H
#include "pub_core_basics.h" // Bool
/* Not really a semaphore, but use a pipe for a token-passing scheme */
typedef struct {
Int pipe[2];
Int owner_lwpid; /* who currently has it */
Bool held_as_LL; /* if held, True == held by a _LL call */
} vg_sema_t;
// Nb: this may be OS-specific, but let's not factor it out until we
// implement an OS port for which this isn't ok.
void ML_(sema_init) ( vg_sema_t *sema );
void ML_(sema_deinit) ( vg_sema_t *sema );
void ML_(sema_down) ( vg_sema_t *sema, Bool as_LL );
void ML_(sema_up) ( vg_sema_t *sema, Bool as_LL );
#endif // __PRIV_SEMA_H
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
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