1 #ifdef USE_PRAGMA_IDENT_HDR 2 #pragma ident "@(#)os_linux.inline.hpp 1.31 07/06/29 04:01:54 JVM" 3 #endif 4 /* 5 * Copyright 1999-2008 Sun Microsystems, Inc. All Rights Reserved. 6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 7 * 8 * This code is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License version 2 only, as 10 * published by the Free Software Foundation. 11 * 12 * This code is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * version 2 for more details (a copy is included in the LICENSE file that 16 * accompanied this code). 17 * 18 * You should have received a copy of the GNU General Public License version 19 * 2 along with this work; if not, write to the Free Software Foundation, 20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 21 * 22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 23 * CA 95054 USA or visit www.sun.com if you need additional information or 24 * have any questions. 25 * 26 */ 27 28 inline void* os::thread_local_storage_at(int index) { 29 return pthread_getspecific((pthread_key_t)index); 30 } 31 32 inline const char* os::file_separator() { 33 return "/"; 34 } 35 36 inline const char* os::line_separator() { 37 return "\n"; 38 } 39 40 inline const char* os::path_separator() { 41 return ":"; 42 } 43 44 inline const char* os::jlong_format_specifier() { 45 return "%lld"; 46 } 47 48 inline const char* os::julong_format_specifier() { 49 return "%llu"; 50 } 51 52 // File names are case-sensitive on windows only 53 inline int os::file_name_strcmp(const char* s1, const char* s2) { 54 return strcmp(s1, s2); 55 } 56 57 inline bool os::obsolete_option(const JavaVMOption *option) { 58 return false; 59 } 60 61 inline bool os::uses_stack_guard_pages() { 62 return true; 63 } 64 65 inline bool os::allocate_stack_guard_pages() { 66 assert(uses_stack_guard_pages(), "sanity check"); 67 return true; 68 } 69 70 71 // On Linux, reservations are made on a page by page basis, nothing to do. 72 inline void os::split_reserved_memory(char *base, size_t size, 73 size_t split, bool realloc) { 74 } 75 76 77 // Bang the shadow pages if they need to be touched to be mapped. 78 inline void os::bang_stack_shadow_pages() { 79 } 80 81 inline DIR* os::opendir(const char* dirname) 82 { 83 assert(dirname != NULL, "just checking"); 84 return ::opendir(dirname); 85 } 86 87 inline int os::readdir_buf_size(const char *path) 88 { 89 return NAME_MAX + sizeof(dirent) + 1; 90 } 91 92 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 93 { 94 dirent* p; 95 int status; 96 assert(dirp != NULL, "just checking"); 97 98 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 99 // version. Here is the doc for this function: 100 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 101 102 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 103 errno = status; 104 return NULL; 105 } else 106 return p; 107 } 108 109 inline int os::closedir(DIR *dirp) 110 { 111 assert(dirp != NULL, "just checking"); 112 return ::closedir(dirp); 113 } 114 115 // macros for restartable system calls 116 117 #define RESTARTABLE(_cmd, _result) do { \ 118 _result = _cmd; \ 119 } while(((int)_result == OS_ERR) && (errno == EINTR)) 120 121 #define RESTARTABLE_RETURN_INT(_cmd) do { \ 122 int _result; \ 123 RESTARTABLE(_cmd, _result); \ 124 return _result; \ 125 } while(false) 126 127 inline bool os::numa_has_static_binding() { return true; } 128 inline bool os::numa_has_group_homing() { return false; }