| 1 | /* |
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| 2 | * kern/mcs_sync.h - ticket-based barriers and locks synchronization |
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| 3 | * |
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| 4 | * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless |
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| 5 | * Copyright (c) 2011,2012 UPMC Sorbonne Universites |
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| 6 | * |
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| 7 | * This file is part of ALMOS-kernel. |
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| 8 | * |
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| 9 | * ALMOS-kernel is free software; you can redistribute it and/or modify it |
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| 10 | * under the terms of the GNU General Public License as published by |
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| 11 | * the Free Software Foundation; version 2.0 of the License. |
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| 12 | * |
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| 13 | * ALMOS-kernel is distributed in the hope that it will be useful, but |
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| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU General Public License |
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| 19 | * along with ALMOS-kernel; if not, write to the Free Software Foundation, |
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| 20 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |
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| 23 | #ifndef _MCS_SYNC_H_ |
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| 24 | #define _MCS_SYNC_H_ |
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| 25 | |
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| 26 | #include <types.h> |
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| 27 | |
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| 28 | /////////////////////////////////////////////// |
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| 29 | // Public Section // |
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| 30 | /////////////////////////////////////////////// |
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| 31 | |
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| 32 | struct mcs_barrier_s; |
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| 33 | struct mcs_lock_s; |
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| 34 | |
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| 35 | typedef struct mcs_barrier_s mcs_barrier_t; |
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| 36 | typedef struct mcs_lock_s mcs_lock_t; |
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| 37 | |
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| 38 | void mcs_barrier_init(mcs_barrier_t *ptr, char *name, uint_t count); |
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| 39 | void mcs_barrier_wait(mcs_barrier_t *ptr); |
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| 40 | |
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| 41 | void mcs_lock_init(mcs_lock_t *ptr, char *name); |
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| 42 | |
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| 43 | void mcs_lock(mcs_lock_t *ptr, uint_t *irq_state); |
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| 44 | void mcs_unlock(mcs_lock_t *ptr, uint_t irq_state); |
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| 45 | |
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| 46 | void mcs_lock_remote(mcs_lock_t *ptr, cid_t cid, uint_t *irq_state); |
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| 47 | void mcs_unlock_remote(mcs_lock_t *ptr, cid_t cid, uint_t irq_state); |
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| 48 | |
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| 49 | ////////////////////////////////////////////// |
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| 50 | // Private Section // |
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| 51 | ////////////////////////////////////////////// |
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| 52 | |
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| 53 | struct mcs_barrier_s |
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| 54 | { |
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| 55 | cacheline_t val; |
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| 56 | cacheline_t phase; |
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| 57 | cacheline_t cntr; |
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| 58 | cacheline_t ticket; |
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| 59 | cacheline_t ticket2; |
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| 60 | char *name CACHELINE; |
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| 61 | } mcs_barrier_t; |
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| 62 | |
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| 63 | |
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| 64 | struct mcs_lock_s |
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| 65 | { |
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| 66 | cacheline_t cntr; |
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| 67 | cacheline_t ticket; |
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| 68 | char *name CACHELINE; |
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| 69 | } mgs_lock_t; |
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| 70 | |
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| 71 | |
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| 72 | |
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| 73 | #endif /* _MCS_SYNC_H_ */ |
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