os_linux.inline.hpp revision 141:fcbfc50865ab
1/* 2 * Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25inline void* os::thread_local_storage_at(int index) { 26 return pthread_getspecific((pthread_key_t)index); 27} 28 29inline const char* os::file_separator() { 30 return "/"; 31} 32 33inline const char* os::line_separator() { 34 return "\n"; 35} 36 37inline const char* os::path_separator() { 38 return ":"; 39} 40 41inline const char* os::jlong_format_specifier() { 42 return "%lld"; 43} 44 45inline const char* os::julong_format_specifier() { 46 return "%llu"; 47} 48 49// File names are case-sensitive on windows only 50inline int os::file_name_strcmp(const char* s1, const char* s2) { 51 return strcmp(s1, s2); 52} 53 54inline bool os::obsolete_option(const JavaVMOption *option) { 55 return false; 56} 57 58inline bool os::uses_stack_guard_pages() { 59 return true; 60} 61 62inline bool os::allocate_stack_guard_pages() { 63 assert(uses_stack_guard_pages(), "sanity check"); 64 return true; 65} 66 67 68// On Linux, reservations are made on a page by page basis, nothing to do. 69inline void os::split_reserved_memory(char *base, size_t size, 70 size_t split, bool realloc) { 71} 72 73 74// Bang the shadow pages if they need to be touched to be mapped. 75inline void os::bang_stack_shadow_pages() { 76} 77 78inline DIR* os::opendir(const char* dirname) 79{ 80 assert(dirname != NULL, "just checking"); 81 return ::opendir(dirname); 82} 83 84inline int os::readdir_buf_size(const char *path) 85{ 86 return NAME_MAX + sizeof(dirent) + 1; 87} 88 89inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 90{ 91 dirent* p; 92 int status; 93 assert(dirp != NULL, "just checking"); 94 95 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 96 // version. Here is the doc for this function: 97 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 98 99 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 100 errno = status; 101 return NULL; 102 } else 103 return p; 104} 105 106inline int os::closedir(DIR *dirp) 107{ 108 assert(dirp != NULL, "just checking"); 109 return ::closedir(dirp); 110} 111 112// macros for restartable system calls 113 114#define RESTARTABLE(_cmd, _result) do { \ 115 _result = _cmd; \ 116 } while(((int)_result == OS_ERR) && (errno == EINTR)) 117 118#define RESTARTABLE_RETURN_INT(_cmd) do { \ 119 int _result; \ 120 RESTARTABLE(_cmd, _result); \ 121 return _result; \ 122} while(false) 123 124inline bool os::numa_has_static_binding() { return true; } 125inline bool os::numa_has_group_homing() { return false; } 126