projects / mirror_spl-debian.git / blame
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1 | /*****************************************************************************\ |
| 2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
| 3 | * Copyright (C) 2007 The Regents of the University of California. | |
| 4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
| 5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
| 715f6251 | 6 | * UCRL-CODE-235197 |
| 7 | * | |
| 716154c5 BB |
8 | * This file is part of the SPL, Solaris Porting Layer. |
| 9 | * For details, see <http://github.com/behlendorf/spl/>. | |
| 10 | * | |
| 11 | * The SPL is free software; you can redistribute it and/or modify it | |
| 12 | * under the terms of the GNU General Public License as published by the | |
| 13 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 14 | * option) any later version. | |
| 715f6251 | 15 | * |
| 716154c5 | 16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT |
| 715f6251 | 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 19 | * for more details. | |
| 20 | * | |
| 21 | * You should have received a copy of the GNU General Public License along | |
| 716154c5 BB |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
| 23 | \*****************************************************************************/ | |
| 715f6251 | 24 | |
| 09b414e8 | 25 | #ifndef _SPL_CONDVAR_H |
| 26 | #define _SPL_CONDVAR_H | |
| f1ca4da6 | 27 | |
| f1b59d26 | 28 | #include <linux/module.h> |
| f1ca4da6 | 29 | #include <linux/wait.h> |
| 4d54fdee | 30 | #include <sys/kmem.h> |
| 4efd4118 | 31 | #include <sys/mutex.h> |
| f1ca4da6 | 32 | |
| 716154c5 BB |
33 | /* |
| 34 | * The kcondvar_t struct is protected by mutex taken externally before | |
| f1ca4da6 | 35 | * calling any of the wait/signal funs, and passed into the wait funs. |
| 36 | */ | |
| 37 | #define CV_MAGIC 0x346545f4 | |
| 38 | #define CV_POISON 0x95 | |
| 39 | ||
| 40 | typedef struct { | |
| 41 | int cv_magic; | |
| 42 | char *cv_name; | |
| 4efd4118 | 43 | int cv_name_size; |
| f1ca4da6 | 44 | wait_queue_head_t cv_event; |
| 45 | atomic_t cv_waiters; | |
| 4efd4118 | 46 | kmutex_t *cv_mutex; |
| f1ca4da6 | 47 | } kcondvar_t; |
| 48 | ||
| 49 | typedef enum { CV_DEFAULT=0, CV_DRIVER } kcv_type_t; | |
| 50 | ||
| 4efd4118 | 51 | extern void __cv_init(kcondvar_t *cvp, char *name, kcv_type_t type, void *arg); |
| 52 | extern void __cv_destroy(kcondvar_t *cvp); | |
| 53 | extern void __cv_wait(kcondvar_t *cvp, kmutex_t *mp); | |
| f752b46e BB |
54 | extern void __cv_wait_interruptible(kcondvar_t *cvp, kmutex_t *mp); |
| 55 | extern clock_t __cv_timedwait(kcondvar_t *cvp, kmutex_t *mp, clock_t exp_time); | |
| 3f688a8c NK |
56 | extern clock_t __cv_timedwait_interruptible(kcondvar_t *cvp, kmutex_t *mp, |
| 57 | clock_t exp_time); | |
| 4efd4118 | 58 | extern void __cv_signal(kcondvar_t *cvp); |
| 59 | extern void __cv_broadcast(kcondvar_t *cvp); | |
| 60 | ||
| 3f688a8c NK |
61 | #define cv_init(cvp, name, type, arg) \ |
| 62 | ({ \ | |
| 63 | if ((name) == NULL) \ | |
| 64 | __cv_init(cvp, #cvp, type, arg); \ | |
| 65 | else \ | |
| 66 | __cv_init(cvp, name, type, arg); \ | |
| 4efd4118 | 67 | }) |
| 3f688a8c NK |
68 | #define cv_destroy(cvp) __cv_destroy(cvp) |
| 69 | #define cv_wait(cvp, mp) __cv_wait(cvp, mp) | |
| 70 | #define cv_wait_interruptible(cvp, mp) __cv_wait_interruptible(cvp,mp) | |
| 71 | #define cv_timedwait(cvp, mp, t) __cv_timedwait(cvp, mp, t) | |
| 72 | #define cv_timedwait_interruptible(cvp, mp, t) \ | |
| 73 | __cv_timedwait_interruptible(cvp, mp, t) | |
| 74 | #define cv_signal(cvp) __cv_signal(cvp) | |
| 75 | #define cv_broadcast(cvp) __cv_broadcast(cvp) | |
| f1ca4da6 | 76 | |
| 09b414e8 | 77 | #endif /* _SPL_CONDVAR_H */ |