72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*
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* Copyright (C) 2013 The Android Open Source Project
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* 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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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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#pragma once
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/**
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* @file sys/swap.h
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* @brief Swap control.
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*/
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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/** swapon() flag to discard pages. */
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#define SWAP_FLAG_DISCARD 0x10000
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/**
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* swapon() flag to give this swap area a non-default priority.
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* The priority is also encoded in the flags:
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* `(priority << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK`.
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*/
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#define SWAP_FLAG_PREFER 0x8000
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/** See SWAP_FLAG_PREFER. */
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#define SWAP_FLAG_PRIO_MASK 0x7fff
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/** See SWAP_FLAG_PREFER. */
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#define SWAP_FLAG_PRIO_SHIFT 0
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/**
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* [swapon(2)](http://man7.org/linux/man-pages/man2/swapon.2.html) enables swapping.
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*
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* Returns 0 on success, and returns -1 and sets `errno` on failure.
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*
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* Available since API level 19.
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*/
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int swapon(const char* __path, int __flags) __INTRODUCED_IN(19);
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/**
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* [swapoff(2)](http://man7.org/linux/man-pages/man2/swapoff.2.html) disables swapping.
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*
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* Returns 0 on success, and returns -1 and sets `errno` on failure.
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*
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* Available since API level 19.
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*/
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int swapoff(const char* __path) __INTRODUCED_IN(19);
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__END_DECLS
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