| 1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== |
| 3 | * |
| 4 | * OpenSPARC T2 Processor File: barrier.h |
| 5 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 6 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. |
| 7 | * |
| 8 | * The above named program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public |
| 10 | * License version 2 as published by the Free Software Foundation. |
| 11 | * |
| 12 | * The above named program is distributed in the hope that it will be |
| 13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public |
| 18 | * License along with this work; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | * |
| 21 | * ========== Copyright Header End ============================================ |
| 22 | */ |
| 23 | /* |
| 24 | * Copyright 2006 Sun Microsystems, Inc. All rights reserved. |
| 25 | * Use is subject to license terms. |
| 26 | */ |
| 27 | |
| 28 | #ifndef _BARRIER_H |
| 29 | #define _BARRIER_H |
| 30 | |
| 31 | #pragma ident "@(#)barrier.h 1.2 06/08/08 SMI" |
| 32 | |
| 33 | #ifdef __cplusplus |
| 34 | extern "C" { |
| 35 | #endif |
| 36 | |
| 37 | #include <thread.h> |
| 38 | #include "basics.h" |
| 39 | |
| 40 | typedef struct { |
| 41 | int maxcnt; /* maximum number of runners */ |
| 42 | struct _sb { |
| 43 | cond_t wait_cv; /* cv for waiters at barrier */ |
| 44 | mutex_t wait_lk; /* mutex for waiters at barrier */ |
| 45 | int runners; /* number of running threads */ |
| 46 | } sb[2]; |
| 47 | struct _sb *sbp; /* current sub-barrier */ |
| 48 | } barrier_t; |
| 49 | |
| 50 | extern int barrier_init(barrier_t *bp, int count); |
| 51 | extern void barrier_wait(barrier_t *bp); |
| 52 | |
| 53 | typedef struct { |
| 54 | int maxcnt; /* maximum number of runners */ |
| 55 | struct _sbb { |
| 56 | volatile int spin_cv; /* "cv" for waiters at barrier */ |
| 57 | volatile int runners; /* number of running threads */ |
| 58 | } sbb[2]; |
| 59 | struct _sbb *sbbp; /* current sub-busy-barrier */ |
| 60 | } barrier_busy_t; |
| 61 | |
| 62 | extern int barrier_busy_init(barrier_busy_t *bbp, int count); |
| 63 | extern void barrier_busy_wait(barrier_busy_t *bbp); |
| 64 | |
| 65 | #ifdef __cplusplus |
| 66 | } |
| 67 | #endif |
| 68 | |
| 69 | #endif /* _BARRIER_H */ |