vm_page_sleep_if_busy.9 revision 267654
Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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1. Redistributions of source code must retain the above copyright
notice(s), this list of conditions and the following disclaimer as
the first lines of this file unmodified other than the possible
addition of one or more copyright notices.
2. Redistributions in binary form must reproduce the above copyright
notice(s), this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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DAMAGE.
$FreeBSD: releng/9.3/share/man/man9/vm_page_sleep_if_busy.9 214097 2010-10-20 06:29:11Z avg $
.Dd July 13, 2001 .Dt VM_PAGE_SLEEP_IF_BUSY 9 .Os .Sh NAME .Nm vm_page_sleep_if_busy .Nd "wait for a busy page to become unbusy" .Sh SYNOPSIS n sys/param.h n vm/vm.h n vm/vm_page.h .Ft int .Fn vm_page_sleep_if_busy "vm_page_t m" "int also_m_busy" "const char *wmesg" .Sh DESCRIPTION The .Fn vm_page_sleep_if_busy function waits until the .Dv VPO_BUSY flag is cleared. If .Fa also_m_busy is non-zero, it also waits for .Fa m->busy to become zero. .Sh RETURN VALUES If .Fn vm_page_sleep_if_busy finds the page busy it returns .Dv TRUE . If not, it returns .Dv FALSE . Returning .Dv TRUE does not necessary mean that .Fn vm_page_sleep_if_busy slept, but only that .Fn splvm was called. .Sh AUTHORS This manual page was written by .An Chad David Aq davidc@acns.ab.ca .
Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice(s), this list of conditions and the following disclaimer as
the first lines of this file unmodified other than the possible
addition of one or more copyright notices.
2. Redistributions in binary form must reproduce the above copyright
notice(s), this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
$FreeBSD: releng/9.3/share/man/man9/vm_page_sleep_if_busy.9 214097 2010-10-20 06:29:11Z avg $
.Dd July 13, 2001 .Dt VM_PAGE_SLEEP_IF_BUSY 9 .Os .Sh NAME .Nm vm_page_sleep_if_busy .Nd "wait for a busy page to become unbusy" .Sh SYNOPSIS n sys/param.h n vm/vm.h n vm/vm_page.h .Ft int .Fn vm_page_sleep_if_busy "vm_page_t m" "int also_m_busy" "const char *wmesg" .Sh DESCRIPTION The .Fn vm_page_sleep_if_busy function waits until the .Dv VPO_BUSY flag is cleared. If .Fa also_m_busy is non-zero, it also waits for .Fa m->busy to become zero. .Sh RETURN VALUES If .Fn vm_page_sleep_if_busy finds the page busy it returns .Dv TRUE . If not, it returns .Dv FALSE . Returning .Dv TRUE does not necessary mean that .Fn vm_page_sleep_if_busy slept, but only that .Fn splvm was called. .Sh AUTHORS This manual page was written by .An Chad David Aq davidc@acns.ab.ca .