490e0de548
Import libpuffs and our port of libpuffs. The port was done as part of GSoC 2011 FUSE project, done by Evgeniy Ivanov. The librefuse import did not require any porting efforts. Libpuffs has been modified to understand our VFS-FS protocol and translate between that and PUFFS. As an example that it works, fuse-ntfs-3g from pkgsrc can be compiled and used to mount ntfs partitions: mount -t ntfs-3g <device> <mountpoint> FUSE only works with the asynchronous version of VFS. See <docs/UPDATING> on how to run AVFS. This patch further includes some changes to mount(1) and mount(2) so it's possible to use file systems provided by pkgsrc (note: manual modifications to /etc/system.conf are still needed. There has been made an exception for fuse-ntfs-3g, so it already as an entry).
93 lines
3.1 KiB
Groff
93 lines
3.1 KiB
Groff
.\" $NetBSD: puffs_cc.3,v 1.12.4.1 2009/02/24 03:45:56 snj Exp $
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.\"
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.\" Copyright (c) 2007, 2008 Antti Kantee. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd January 28, 2008
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.Dt PUFFS_CC 3
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.Os
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.Sh NAME
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.Nm puffs_cc
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.Nd puffs continuation routines
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.Sh LIBRARY
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.Lb libpuffs
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.Sh SYNOPSIS
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.In puffs.h
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.Ft void
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.Fn puffs_cc_yield "struct puffs_cc *pcc"
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.Ft void
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.Fn puffs_cc_continue "struct puffs_cc *pcc"
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.Ft void
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.Fn puffs_cc_schedule "struct puffs_cc *pcc"
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.Ft struct puffs_cc *
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.Fn puffs_cc_getcc "struct puffs_usermount *pu"
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.Sh DESCRIPTION
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These routines are used for the cooperative multitasking suite present
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in puffs.
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.Pp
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.Bl -tag -width xxxx
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.It Fn puffs_cc_yield "pcc"
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Suspend and save the current execution context and return control
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to the previous point.
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In practice, from the file system author perspective, control returns
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back to where either the mainloop or where
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.Fn puffs_dispatch_exec
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was called from.
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.It Fn puffs_cc_continue pcc
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Will suspend current execution and return control to where it was
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before before calling
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.Fn puffs_cc_yield .
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This is rarely called directly but rather through
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.Fn puffs_dispatch_exec .
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.It Fn puffs_cc_schedule "pcc"
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Schedule a continuation.
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As opposed to
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.Fn puffs_cc_continue
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this call returns immediately.
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.Fa pcc
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will be scheduled sometime in the future.
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.It Fn puffs_cc_getcc "pu"
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Returns the current pcc or
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.Dv NULL
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if this is the main thread.
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.Em NOTE :
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The argument
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.Ar pu
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will most likely disappear at some point.
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.El
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.Pp
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Before calling
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.Fn puffs_cc_yield
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a file system will typically want to record some cookie value into its
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own internal bookkeeping.
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This cookie should be hooked to the
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.Va pcc
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so that the correct continuation can be continued when the event it
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was waiting for triggers. Alternatively, the
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.Xr puffs_framebuf 3
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framework and
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.Fn puffs_mainloop
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can be used for handling this automatically.
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.Sh SEE ALSO
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.Xr puffs 3 ,
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.Xr puffs_framebuf 3
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