1 2 /*--------------------------------------------------------------------*/ 3 /*--- Private scheduler header. priv_sema.h ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2000-2015 Julian Seward 11 jseward (at) acm.org 12 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. 17 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. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29 */ 30 31 #ifndef __PRIV_SEMA_H 32 #define __PRIV_SEMA_H 33 34 #include "pub_core_basics.h" // Bool 35 36 /* Not really a semaphore, but use a pipe for a token-passing scheme */ 37 typedef struct { 38 Int pipe[2]; 39 Int owner_lwpid; /* who currently has it */ 40 Bool held_as_LL; /* if held, True == held by a _LL call */ 41 } vg_sema_t; 42 43 // Nb: this may be OS-specific, but let's not factor it out until we 44 // implement an OS port for which this isn't ok. 45 void ML_(sema_init) ( vg_sema_t *sema ); 46 void ML_(sema_deinit) ( vg_sema_t *sema ); 47 void ML_(sema_down) ( vg_sema_t *sema, Bool as_LL ); 48 void ML_(sema_up) ( vg_sema_t *sema, Bool as_LL ); 49 50 #endif // __PRIV_SEMA_H 51 52 /*--------------------------------------------------------------------*/ 53 /*--- end ---*/ 54 /*--------------------------------------------------------------------*/ 55 56
