10b0e7057128c213bee8d2158b976869475f7cb42José Fonseca/************************************************************************** 20b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * 30b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * Copyright 2008-2010 VMware, Inc. 40b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * All Rights Reserved. 50b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * 60b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * Permission is hereby granted, free of charge, to any person obtaining a 70b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * copy of this software and associated documentation files (the 80b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * "Software"), to deal in the Software without restriction, including 90b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * without limitation the rights to use, copy, modify, merge, publish, 100b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * distribute, sub license, and/or sell copies of the Software, and to 110b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * permit persons to whom the Software is furnished to do so, subject to 120b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * the following conditions: 130b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * 140b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * The above copyright notice and this permission notice (including the 150b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * next paragraph) shall be included in all copies or substantial portions 160b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * of the Software. 170b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * 180b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 190b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 200b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 210b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 220b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 230b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 240b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 250b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * 260b0e7057128c213bee8d2158b976869475f7cb42José Fonseca **************************************************************************/ 270b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 280b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 290b0e7057128c213bee8d2158b976869475f7cb42José Fonseca/* 300b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * Memory alignment wrappers. 310b0e7057128c213bee8d2158b976869475f7cb42José Fonseca */ 320b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 330b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 340b0e7057128c213bee8d2158b976869475f7cb42José Fonseca#ifndef _OS_MEMORY_H_ 350b0e7057128c213bee8d2158b976869475f7cb42José Fonseca#error "Must not be included directly. Include os_memory.h instead" 360b0e7057128c213bee8d2158b976869475f7cb42José Fonseca#endif 370b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 380b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 390b0e7057128c213bee8d2158b976869475f7cb42José Fonseca#include "pipe/p_compiler.h" 400b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 410b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 420b0e7057128c213bee8d2158b976869475f7cb42José Fonseca/** 430b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * Return memory on given byte alignment 440b0e7057128c213bee8d2158b976869475f7cb42José Fonseca */ 450b0e7057128c213bee8d2158b976869475f7cb42José Fonsecastatic INLINE void * 4624ea02553efccc52581479819d8ead8d2bb06aafJosé Fonsecaos_malloc_aligned(size_t size, size_t alignment) 470b0e7057128c213bee8d2158b976869475f7cb42José Fonseca{ 480b0e7057128c213bee8d2158b976869475f7cb42José Fonseca char *ptr, *buf; 490b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 500b0e7057128c213bee8d2158b976869475f7cb42José Fonseca ptr = (char *) os_malloc(size + alignment + sizeof(void *)); 510b0e7057128c213bee8d2158b976869475f7cb42José Fonseca if (!ptr) 520b0e7057128c213bee8d2158b976869475f7cb42José Fonseca return NULL; 530b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 5424ea02553efccc52581479819d8ead8d2bb06aafJosé Fonseca buf = (char *)(((uintptr_t)ptr + sizeof(void *) + alignment - 1) & ~((uintptr_t)(alignment - 1))); 550b0e7057128c213bee8d2158b976869475f7cb42José Fonseca *(char **)(buf - sizeof(void *)) = ptr; 560b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 570b0e7057128c213bee8d2158b976869475f7cb42José Fonseca return buf; 580b0e7057128c213bee8d2158b976869475f7cb42José Fonseca} 590b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 600b0e7057128c213bee8d2158b976869475f7cb42José Fonseca 610b0e7057128c213bee8d2158b976869475f7cb42José Fonseca/** 620b0e7057128c213bee8d2158b976869475f7cb42José Fonseca * Free memory returned by align_malloc(). 630b0e7057128c213bee8d2158b976869475f7cb42José Fonseca */ 640b0e7057128c213bee8d2158b976869475f7cb42José Fonsecastatic INLINE void 650b0e7057128c213bee8d2158b976869475f7cb42José Fonsecaos_free_aligned(void *ptr) 660b0e7057128c213bee8d2158b976869475f7cb42José Fonseca{ 670b0e7057128c213bee8d2158b976869475f7cb42José Fonseca if (ptr) { 680b0e7057128c213bee8d2158b976869475f7cb42José Fonseca void **cubbyHole = (void **) ((char *) ptr - sizeof(void *)); 690b0e7057128c213bee8d2158b976869475f7cb42José Fonseca void *realAddr = *cubbyHole; 700b0e7057128c213bee8d2158b976869475f7cb42José Fonseca os_free(realAddr); 710b0e7057128c213bee8d2158b976869475f7cb42José Fonseca } 720b0e7057128c213bee8d2158b976869475f7cb42José Fonseca} 73