1 /************************************************************************** 2 * 3 * Copyright 2011 LunarG, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 /** 29 * @file 30 * OS independent memory mapping (with large file support). 31 * 32 * @author Chia-I Wu <olvaffe (at) gmail.com> 33 */ 34 35 #ifndef _OS_MMAN_H_ 36 #define _OS_MMAN_H_ 37 38 39 #include "pipe/p_config.h" 40 #include "pipe/p_compiler.h" 41 42 #if defined(PIPE_OS_UNIX) 43 # ifndef _FILE_OFFSET_BITS 44 # error _FILE_OFFSET_BITS must be defined to 64 45 # endif 46 # include <sys/mman.h> 47 #else 48 # error Unsupported OS 49 #endif 50 51 #if defined(PIPE_OS_ANDROID) 52 # include <errno.h> /* for EINVAL */ 53 #endif 54 55 #ifdef __cplusplus 56 extern "C" { 57 #endif 58 59 60 #if defined(PIPE_OS_ANDROID) 61 62 extern void *__mmap2(void *, size_t, int, int, int, size_t); 63 64 static INLINE void *os_mmap(void *addr, size_t length, int prot, int flags, int fd, loff_t offset) 65 { 66 /* offset must be aligned to 4096 (not necessarily the page size) */ 67 if (unlikely(offset & 4095)) { 68 errno = EINVAL; 69 return MAP_FAILED; 70 } 71 72 return __mmap2(addr, length, prot, flags, fd, (size_t) (offset >> 12)); 73 } 74 75 #else 76 /* assume large file support exists */ 77 # define os_mmap(addr, length, prot, flags, fd, offset) mmap(addr, length, prot, flags, fd, offset) 78 #endif 79 80 #define os_munmap(addr, length) munmap(addr, length) 81 82 83 #ifdef __cplusplus 84 } 85 #endif 86 87 #endif /* _OS_MMAN_H_ */ 88
