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/*
* Copyright (C) 2013 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, 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 HOLDERS AND CONTRIBUTORS
* "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 OWNER OR CONTRIBUTORS 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.
*/
#pragma once
/**
* @file sys/swap.h
* @brief Swap control.
*/
#include <sys/cdefs.h>
__BEGIN_DECLS
/** swapon() flag to discard pages. */
#define SWAP_FLAG_DISCARD 0x10000
/**
* swapon() flag to give this swap area a non-default priority.
* The priority is also encoded in the flags:
* `(priority << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK`.
*/
#define SWAP_FLAG_PREFER 0x8000
/** See SWAP_FLAG_PREFER. */
#define SWAP_FLAG_PRIO_MASK 0x7fff
/** See SWAP_FLAG_PREFER. */
#define SWAP_FLAG_PRIO_SHIFT 0
/**
* [swapon(2)](http://man7.org/linux/man-pages/man2/swapon.2.html) enables swapping.
*
* Returns 0 on success, and returns -1 and sets `errno` on failure.
*
* Available since API level 19.
*/
int swapon(const char* __path, int __flags) __INTRODUCED_IN(19);
/**
* [swapoff(2)](http://man7.org/linux/man-pages/man2/swapoff.2.html) disables swapping.
*
* Returns 0 on success, and returns -1 and sets `errno` on failure.
*
* Available since API level 19.
*/
int swapoff(const char* __path) __INTRODUCED_IN(19);
__END_DECLS