bart | 78bfc71 | 2011-12-08 16:14:59 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- Scheduler lock support functions sched-lock.c ---*/ |
| 4 | /*--------------------------------------------------------------------*/ |
| 5 | |
| 6 | /* |
| 7 | This file is part of Valgrind, a dynamic binary instrumentation |
| 8 | framework. |
| 9 | |
Elliott Hughes | ed39800 | 2017-06-21 14:41:24 -0700 | [diff] [blame^] | 10 | Copyright (C) 2011-2017 Bart Van Assche <bvanassche@acm.org>. |
bart | 78bfc71 | 2011-12-08 16:14:59 +0000 | [diff] [blame] | 11 | |
| 12 | This program is free software; you can redistribute it and/or |
| 13 | modify it under the terms of the GNU General Public License as |
| 14 | published by the Free Software Foundation; either version 2 of the |
| 15 | License, or (at your option) any later version. |
| 16 | |
| 17 | This program is distributed in the hope that it will be useful, but |
| 18 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | General Public License for more details. |
| 21 | |
| 22 | You should have received a copy of the GNU General Public License |
| 23 | along with this program; if not, write to the Free Software |
| 24 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 25 | 02111-1307, USA. |
| 26 | |
| 27 | The GNU General Public License is contained in the file COPYING. |
| 28 | */ |
| 29 | |
| 30 | #include "config.h" |
| 31 | #include "pub_core_basics.h" |
florian | c91f584 | 2013-09-15 10:42:26 +0000 | [diff] [blame] | 32 | #include "pub_core_libcbase.h" |
| 33 | #include "pub_core_mallocfree.h" |
bart | 78bfc71 | 2011-12-08 16:14:59 +0000 | [diff] [blame] | 34 | #include "priv_sema.h" |
| 35 | #include "priv_sched-lock.h" |
| 36 | #include "priv_sched-lock-impl.h" |
| 37 | |
| 38 | static struct sched_lock_ops const *sched_lock_ops = |
| 39 | &ML_(generic_sched_lock_ops); |
| 40 | |
| 41 | static struct sched_lock_ops const *const sched_lock_impl[] = { |
| 42 | [sched_lock_generic] = &ML_(generic_sched_lock_ops), |
| 43 | #ifdef ENABLE_LINUX_TICKET_LOCK |
| 44 | [sched_lock_ticket] = &ML_(linux_ticket_lock_ops), |
| 45 | #endif |
| 46 | }; |
| 47 | |
| 48 | /** |
| 49 | * Define which scheduler lock implementation to use. |
| 50 | * |
| 51 | * @param[in] t Scheduler lock type. |
| 52 | * |
| 53 | * @return True if and only if this function succeeded. |
| 54 | * |
| 55 | * @note Must be called before any other sched_lock*() function is invoked. |
| 56 | */ |
| 57 | Bool ML_(set_sched_lock_impl)(const enum SchedLockType t) |
| 58 | { |
| 59 | struct sched_lock_ops const *p = NULL; |
| 60 | |
| 61 | if ((unsigned)t < sizeof(sched_lock_impl)/sizeof(sched_lock_impl[0])) |
| 62 | p = sched_lock_impl[t]; |
| 63 | if (p) |
| 64 | sched_lock_ops = p; |
| 65 | return !!p; |
| 66 | } |
| 67 | |
florian | cd19e99 | 2012-11-03 19:32:28 +0000 | [diff] [blame] | 68 | const HChar *ML_(get_sched_lock_name)(void) |
bart | 78bfc71 | 2011-12-08 16:14:59 +0000 | [diff] [blame] | 69 | { |
| 70 | return (sched_lock_ops->get_sched_lock_name)(); |
| 71 | } |
| 72 | |
| 73 | struct sched_lock *ML_(create_sched_lock)(void) |
| 74 | { |
| 75 | return (sched_lock_ops->create_sched_lock)(); |
| 76 | } |
| 77 | |
| 78 | void ML_(destroy_sched_lock)(struct sched_lock *p) |
| 79 | { |
| 80 | return (sched_lock_ops->destroy_sched_lock)(p); |
| 81 | } |
| 82 | |
| 83 | int ML_(get_sched_lock_owner)(struct sched_lock *p) |
| 84 | { |
| 85 | return (sched_lock_ops->get_sched_lock_owner)(p); |
| 86 | } |
| 87 | |
| 88 | void ML_(acquire_sched_lock)(struct sched_lock *p) |
| 89 | { |
| 90 | return (sched_lock_ops->acquire_sched_lock)(p); |
| 91 | } |
| 92 | |
| 93 | void ML_(release_sched_lock)(struct sched_lock *p) |
| 94 | { |
| 95 | return (sched_lock_ops->release_sched_lock)(p); |
| 96 | } |