diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zrlock.h')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zrlock.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zrlock.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zrlock.h new file mode 100644 index 000000000000..b6eba1a18ff4 --- /dev/null +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zrlock.h @@ -0,0 +1,63 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2015 by Delphix. All rights reserved. + */ + +#ifndef _SYS_ZRLOCK_H +#define _SYS_ZRLOCK_H + +#include <sys/zfs_context.h> + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct zrlock { + kmutex_t zr_mtx; + volatile int32_t zr_refcount; + kcondvar_t zr_cv; + uint16_t zr_pad; +#ifdef ZFS_DEBUG + kthread_t *zr_owner; + const char *zr_caller; +#endif +} zrlock_t; + +extern void zrl_init(zrlock_t *); +extern void zrl_destroy(zrlock_t *); +#define zrl_add(_z) zrl_add_impl((_z), __func__) +extern void zrl_add_impl(zrlock_t *, const char *); +extern void zrl_remove(zrlock_t *); +extern int zrl_tryenter(zrlock_t *); +extern void zrl_exit(zrlock_t *); +extern int zrl_is_zero(zrlock_t *); +extern int zrl_is_locked(zrlock_t *); +#ifdef ZFS_DEBUG +extern kthread_t *zrl_owner(zrlock_t *); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_ZRLOCK_H */ |