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hotspot/src/os/linux/vm/os_linux.inline.hpp

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+/*
+ * Copyright 1999-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+inline void* os::thread_local_storage_at(int index) {
+  return pthread_getspecific((pthread_key_t)index);
+}
+
+inline const char* os::file_separator() {
+  return "/";
+}
+
+inline const char* os::line_separator() {
+  return "\n";
+}
+
+inline const char* os::path_separator() {
+  return ":";
+}
+
+inline const char* os::jlong_format_specifier() {
+  return "%lld";
+}
+
+inline const char* os::julong_format_specifier() {
+  return "%llu";
+}
+
+// File names are case-sensitive on windows only
+inline int os::file_name_strcmp(const char* s1, const char* s2) {
+  return strcmp(s1, s2);
+}
+
+inline bool os::obsolete_option(const JavaVMOption *option) {
+  return false;
+}
+
+inline bool os::uses_stack_guard_pages() {
+  return true;
+}
+
+inline bool os::allocate_stack_guard_pages() {
+  assert(uses_stack_guard_pages(), "sanity check");
+  return true;
+}
+
+
+// On Linux, reservations are made on a page by page basis, nothing to do.
+inline void os::split_reserved_memory(char *base, size_t size,
+                                      size_t split, bool realloc) {
+}
+
+
+// Bang the shadow pages if they need to be touched to be mapped.
+inline void os::bang_stack_shadow_pages() {
+}
+
+inline DIR* os::opendir(const char* dirname)
+{
+  assert(dirname != NULL, "just checking");
+  return ::opendir(dirname);
+}
+
+inline int os::readdir_buf_size(const char *path)
+{
+  return NAME_MAX + sizeof(dirent) + 1;
+}
+
+inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
+{
+  dirent* p;
+  int status;
+  assert(dirp != NULL, "just checking");
+
+  // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
+  // version. Here is the doc for this function:
+  // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
+
+  if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
+    errno = status;
+    return NULL;
+  } else
+    return p;
+}
+
+inline int os::closedir(DIR *dirp)
+{
+  assert(dirp != NULL, "just checking");
+  return ::closedir(dirp);
+}
+
+// macros for restartable system calls
+
+#define RESTARTABLE(_cmd, _result) do { \
+    _result = _cmd; \
+  } while(((int)_result == OS_ERR) && (errno == EINTR))
+
+#define RESTARTABLE_RETURN_INT(_cmd) do { \
+  int _result; \
+  RESTARTABLE(_cmd, _result); \
+  return _result; \
+} while(false)