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Diffstat (limited to 'src/systemd/sd-readahead.h')
-rw-r--r-- | src/systemd/sd-readahead.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/systemd/sd-readahead.h b/src/systemd/sd-readahead.h new file mode 100644 index 000000000..1f8c5a0ca --- /dev/null +++ b/src/systemd/sd-readahead.h @@ -0,0 +1,73 @@ +/*-*- 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 readahead 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. + + Since 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(7) for more information. +*/ + +/* + Controls ongoing disk read-ahead operations during boot-up. The argument + must be a string, and either "cancel", "done" or "noreplay". + + cancel = terminate read-ahead data collection, drop collected information + done = terminate read-ahead data collection, keep collected information + noreplay = terminate read-ahead replay +*/ +int sd_readahead(const char *action); + +#ifdef __cplusplus +} +#endif + +#endif |