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82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#ifndef foosdreadaheadhfoo
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#define foosdreadaheadhfoo
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/***
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Copyright 2010 Lennart Poettering
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation files
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(the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge,
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publish, distribute, sublicense, and/or sell copies of the Software,
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and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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***/
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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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Reference implementation of a few boot readahead related
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interfaces. These interfaces are trivial to implement. To simplify
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porting we provide this reference implementation. Applications are
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welcome to reimplement the algorithms described here if they do not
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want to include these two source files.
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You may compile this with -DDISABLE_SYSTEMD to disable systemd
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support. This makes all calls NOPs.
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Since this is drop-in code we don't want any of our symbols to be
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exported in any case. Hence we declare hidden visibility for all of
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them.
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You may find an up-to-date version of these source files online:
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http://cgit.freedesktop.org/systemd/plain/src/sd-readahead.h
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http://cgit.freedesktop.org/systemd/plain/src/sd-readahead.c
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This should compile on non-Linux systems, too, but all functions
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will become NOPs.
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See sd-readahead(7) for more information.
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*/
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#ifndef _sd_hidden_
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#if (__GNUC__ >= 4) && !defined(SD_EXPORT_SYMBOLS)
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#define _sd_hidden_ __attribute__ ((visibility("hidden")))
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#else
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#define _sd_hidden_
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#endif
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#endif
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/*
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Controls ongoing disk read-ahead operations during boot-up. The argument
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must be a string, and either "cancel", "done" or "noreplay".
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cancel = terminate read-ahead data collection, drop collected information
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done = terminate read-ahead data collection, keep collected information
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noreplay = terminate read-ahead replay
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*/
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int sd_readahead(const char *action) _sd_hidden_;
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#ifdef __cplusplus
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}
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#endif
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#endif
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