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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#ifndef foosdreadaheadhfoo
#define foosdreadaheadhfoo
/***
Copyright 2010 Lennart Poettering
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation files
(the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
***/
#ifdef __cplusplus
extern "C" {
#endif
/*
Reference implementation of a few boot read-ahead-related
interfaces. These interfaces are trivial to implement. To simplify
porting, we provide this reference implementation. Applications are
welcome to reimplement the algorithms described here if they do not
want to include these two source files.
You may compile this with -DDISABLE_SYSTEMD to disable systemd
support. This makes all calls NOPs.
Because this is drop-in code, we don't want any of our symbols to be
exported in any case. Hence, we declare hidden visibility for all of
them.
You may find an up-to-date version of these source files online:
http://cgit.freedesktop.org/systemd/systemd/plain/src/systemd/sd-readahead.h
http://cgit.freedesktop.org/systemd/systemd/plain/src/readahead/sd-readahead.c
This should compile on non-Linux systems too, but all functions
will become NOPs.
See sd-readahead(3) for more information.
*/
/*
Controls on-going disk read-ahead operations during boot-up. The argument
must be one of the following strings: "cancel", "done", or "noreplay".
cancel = terminate read-ahead data collection, and drop collected information
done = terminate read-ahead data collection, and keep collected information
noreplay = terminate read-ahead replay
*/
int sd_readahead(const char *action);
#ifdef __cplusplus
}
#endif
#endif
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