1 /*
   2  * Copyright 1997-2008 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 
  25 inline const char* os::file_separator()                { return "\\"; }
  26 inline const char* os::line_separator()                { return "\r\n"; }
  27 inline const char* os::path_separator()                { return ";"; }
  28 
  29 inline const char* os::jlong_format_specifier()        { return "%I64d"; }
  30 inline const char* os::julong_format_specifier()       { return "%I64u"; }
  31 
  32 // File names are case-insensitive on windows only
  33 inline int os::file_name_strcmp(const char* s, const char* t) {
  34   return _stricmp(s, t);
  35 }
  36 
  37 // Used to improve time-sharing on some systems
  38 inline void os::loop_breaker(int attempts) {}
  39 
  40 inline bool os::obsolete_option(const JavaVMOption *option) {
  41   return false;
  42 }
  43 
  44 inline bool os::uses_stack_guard_pages() {
  45   return os::win32::is_nt();
  46 }
  47 
  48 inline bool os::allocate_stack_guard_pages() {
  49   assert(uses_stack_guard_pages(), "sanity check");
  50   return true;
  51 }
  52 
  53 inline int os::readdir_buf_size(const char *path)
  54 {
  55   /* As Windows doesn't use the directory entry buffer passed to
  56      os::readdir() this can be as short as possible */
  57 
  58   return 1;
  59 }
  60 
  61 // Bang the shadow pages if they need to be touched to be mapped.
  62 inline void os::bang_stack_shadow_pages() {
  63   // Write to each page of our new frame to force OS mapping.
  64   // If we decrement stack pointer more than one page
  65   // the OS may not map an intervening page into our space
  66   // and may fault on a memory access to interior of our frame.
  67   address sp = current_stack_pointer();
  68   for (int pages = 1; pages <= StackShadowPages; pages++) {
  69     *((int *)(sp - (pages * vm_page_size()))) = 0;
  70   }
  71 }
  72 
  73 inline bool os::numa_has_static_binding()   { return true;   }
  74 inline bool os::numa_has_group_homing()     { return false;  }