1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #pragma once 30 31 /** 32 * @file sys/swap.h 33 * @brief Swap control. 34 */ 35 36 #include <sys/cdefs.h> 37 38 __BEGIN_DECLS 39 40 /** swapon() flag to discard pages. */ 41 #define SWAP_FLAG_DISCARD 0x10000 42 43 /** 44 * swapon() flag to give this swap area a non-default priority. 45 * The priority is also encoded in the flags: 46 * `(priority << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK`. 47 */ 48 #define SWAP_FLAG_PREFER 0x8000 49 /** See SWAP_FLAG_PREFER. */ 50 #define SWAP_FLAG_PRIO_MASK 0x7fff 51 /** See SWAP_FLAG_PREFER. */ 52 #define SWAP_FLAG_PRIO_SHIFT 0 53 54 /** 55 * [swapon(2)](http://man7.org/linux/man-pages/man2/swapon.2.html) enables swapping. 56 * 57 * Returns 0 on success, and returns -1 and sets `errno` on failure. 58 * 59 * Available since API level 19. 60 */ 61 int swapon(const char* __path, int __flags) __INTRODUCED_IN(19); 62 63 /** 64 * [swapoff(2)](http://man7.org/linux/man-pages/man2/swapoff.2.html) disables swapping. 65 * 66 * Returns 0 on success, and returns -1 and sets `errno` on failure. 67 * 68 * Available since API level 19. 69 */ 70 int swapoff(const char* __path) __INTRODUCED_IN(19); 71 72 __END_DECLS 73
