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@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 # include <sys/mman.h> 44 #else 45 # error Unsupported OS 46 #endif 47 48 #ifdef __cplusplus 49 extern "C" { 50 #endif 51 52 53 #if defined(PIPE_OS_ANDROID) && !defined(__LP64__) 54 /* 32-bit needs mmap64 for 64-bit offsets */ 55 # define os_mmap(addr, length, prot, flags, fd, offset) \ 56 mmap64(addr, length, prot, flags, fd, offset) 57 58 # define os_munmap(addr, length) \ 59 munmap(addr, length) 60 61 #else 62 /* assume large file support exists */ 63 # define os_mmap(addr, length, prot, flags, fd, offset) \ 64 mmap(addr, length, prot, flags, fd, offset) 65 66 static inline int os_munmap(void *addr, size_t length) 67 { 68 /* Copied from configure code generated by AC_SYS_LARGEFILE */ 69 #define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + \ 70 (((off_t) 1 << 31) << 31)) 71 STATIC_ASSERT(LARGE_OFF_T % 2147483629 == 721 && 72 LARGE_OFF_T % 2147483647 == 1); 73 #undef LARGE_OFF_T 74 75 return munmap(addr, length); 76 } 77 #endif 78 79 80 #ifdef __cplusplus 81 } 82 #endif 83 84 #endif /* _OS_MMAN_H_ */ 85