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6283f55ea1
One of the neat tricks an autoconf style project is capable of is allow configurion/building in a directory other than the source directory. The major advantage to this is that you can build the project various different ways while making changes in a single source tree. For example, this project is designed to work on various different Linux distributions each of which work slightly differently. This means that changes need to verified on each of those supported distributions perferably before the change is committed to the public git repo. Using nfs and custom build directories makes this much easier. I now have a single source tree in nfs mounted on several different systems each running a supported distribution. When I make a change to the source base I suspect may break things I can concurrently build from the same source on all the systems each in their own subdirectory. wget -c http://github.com/downloads/behlendorf/zfs/zfs-x.y.z.tar.gz tar -xzf zfs-x.y.z.tar.gz cd zfs-x-y-z ------------------------- run concurrently ---------------------- <ubuntu system> <fedora system> <debian system> <rhel6 system> mkdir ubuntu mkdir fedora mkdir debian mkdir rhel6 cd ubuntu cd fedora cd debian cd rhel6 ../configure ../configure ../configure ../configure make make make make make check make check make check make check This change also moves many of the include headers from individual incude/sys directories under the modules directory in to a single top level include directory. This has the advantage of making the build rules cleaner and logically it makes a bit more sense.
108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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*/
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#ifndef _SYS_REFCOUNT_H
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#define _SYS_REFCOUNT_H
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#include <sys/inttypes.h>
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#include <sys/list.h>
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#include <sys/zfs_context.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* If the reference is held only by the calling function and not any
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* particular object, use FTAG (which is a string) for the holder_tag.
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* Otherwise, use the object that holds the reference.
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*/
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#define FTAG ((char *)__func__)
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#ifdef ZFS_DEBUG
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typedef struct reference {
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list_node_t ref_link;
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void *ref_holder;
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uint64_t ref_number;
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uint8_t *ref_removed;
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} reference_t;
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typedef struct refcount {
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kmutex_t rc_mtx;
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list_t rc_list;
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list_t rc_removed;
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int64_t rc_count;
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int64_t rc_removed_count;
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} refcount_t;
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/* Note: refcount_t must be initialized with refcount_create() */
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void refcount_create(refcount_t *rc);
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void refcount_destroy(refcount_t *rc);
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void refcount_destroy_many(refcount_t *rc, uint64_t number);
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int refcount_is_zero(refcount_t *rc);
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int64_t refcount_count(refcount_t *rc);
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int64_t refcount_add(refcount_t *rc, void *holder_tag);
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int64_t refcount_remove(refcount_t *rc, void *holder_tag);
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int64_t refcount_add_many(refcount_t *rc, uint64_t number, void *holder_tag);
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int64_t refcount_remove_many(refcount_t *rc, uint64_t number, void *holder_tag);
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void refcount_transfer(refcount_t *dst, refcount_t *src);
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void refcount_init(void);
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void refcount_fini(void);
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#else /* ZFS_DEBUG */
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typedef struct refcount {
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uint64_t rc_count;
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} refcount_t;
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#define refcount_create(rc) ((rc)->rc_count = 0)
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#define refcount_destroy(rc) ((rc)->rc_count = 0)
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#define refcount_destroy_many(rc, number) ((rc)->rc_count = 0)
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#define refcount_is_zero(rc) ((rc)->rc_count == 0)
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#define refcount_count(rc) ((rc)->rc_count)
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#define refcount_add(rc, holder) atomic_add_64_nv(&(rc)->rc_count, 1)
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#define refcount_remove(rc, holder) atomic_add_64_nv(&(rc)->rc_count, -1)
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#define refcount_add_many(rc, number, holder) \
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atomic_add_64_nv(&(rc)->rc_count, number)
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#define refcount_remove_many(rc, number, holder) \
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atomic_add_64_nv(&(rc)->rc_count, -number)
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#define refcount_transfer(dst, src) { \
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uint64_t __tmp = (src)->rc_count; \
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atomic_add_64(&(src)->rc_count, -__tmp); \
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atomic_add_64(&(dst)->rc_count, __tmp); \
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}
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#define refcount_init()
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#define refcount_fini()
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#endif /* ZFS_DEBUG */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_REFCOUNT_H */
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