15afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui/* 25afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * Copyright (C) 2014 The Android Open Source Project 35afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * All rights reserved. 45afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * 55afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * Redistribution and use in source and binary forms, with or without 65afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * modification, are permitted provided that the following conditions 75afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * are met: 85afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * * Redistributions of source code must retain the above copyright 95afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * notice, this list of conditions and the following disclaimer. 105afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * * Redistributions in binary form must reproduce the above copyright 115afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * notice, this list of conditions and the following disclaimer in 125afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * the documentation and/or other materials provided with the 135afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * distribution. 145afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * 155afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 165afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 175afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 185afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 195afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 205afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 215afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 225afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 235afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 245afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 255afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 265afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui * SUCH DAMAGE. 275afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui */ 285afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui 295afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui#include <errno.h> 305afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui#include <sys/mman.h> 315afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui 325afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui#include "private/ErrnoRestorer.h" 335afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui 345afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cuiint posix_madvise(void* addr, size_t len, int advice) { 355afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui ErrnoRestorer errno_restorer; 365afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui 375afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui // Don't call madvise() on POSIX_MADV_DONTNEED, it will make the space not available. 385afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui if (advice == POSIX_MADV_DONTNEED) { 395afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui return 0; 405afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui } 415afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui return (madvise(addr, len, advice) == 0 ? 0 : errno); 425afae64a1bac56638c6348f0c8f5e9d61b654029Yabin Cui} 43