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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.
90 lines
2.5 KiB
C
90 lines
2.5 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 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_FS_ZFS_RLOCK_H
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#define _SYS_FS_ZFS_RLOCK_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef _KERNEL
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#include <sys/zfs_znode.h>
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typedef enum {
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RL_READER,
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RL_WRITER,
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RL_APPEND
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} rl_type_t;
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typedef struct rl {
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znode_t *r_zp; /* znode this lock applies to */
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avl_node_t r_node; /* avl node link */
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uint64_t r_off; /* file range offset */
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uint64_t r_len; /* file range length */
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uint_t r_cnt; /* range reference count in tree */
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rl_type_t r_type; /* range type */
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kcondvar_t r_wr_cv; /* cv for waiting writers */
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kcondvar_t r_rd_cv; /* cv for waiting readers */
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uint8_t r_proxy; /* acting for original range */
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uint8_t r_write_wanted; /* writer wants to lock this range */
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uint8_t r_read_wanted; /* reader wants to lock this range */
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} rl_t;
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/*
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* Lock a range (offset, length) as either shared (READER)
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* or exclusive (WRITER or APPEND). APPEND is a special type that
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* is converted to WRITER that specified to lock from the start of the
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* end of file. zfs_range_lock() returns the range lock structure.
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*/
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rl_t *zfs_range_lock(znode_t *zp, uint64_t off, uint64_t len, rl_type_t type);
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/*
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* Unlock range and destroy range lock structure.
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*/
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void zfs_range_unlock(rl_t *rl);
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/*
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* Reduce range locked as RW_WRITER from whole file to specified range.
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* Asserts the whole file was previously locked.
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*/
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void zfs_range_reduce(rl_t *rl, uint64_t off, uint64_t len);
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/*
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* AVL comparison function used to compare range locks
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*/
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int zfs_range_compare(const void *arg1, const void *arg2);
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#endif /* _KERNEL */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_FS_ZFS_RLOCK_H */
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