Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright 1997-2008 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 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::uses_stack_guard_pages() {

   return true;

 }

 inline bool os::allocate_stack_guard_pages() {

   assert(uses_stack_guard_pages(), "sanity check");

   int r = thr_main() ;

   guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;

   return r;

 }

 // On Solaris, 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)

 {

   int size = pathconf(path, _PC_NAME_MAX);

   return (size < 0 ? MAXPATHLEN : size) + sizeof(dirent) + 1;

 }

 inline struct dirent* os::readdir(DIR* dirp, dirent* dbuf)

 {

   assert(dirp != NULL, "just checking");

 #if defined(_LP64) || defined(_GNU_SOURCE)

   dirent* p;

   int status;

   if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {

     errno = status;

     return NULL;

   } else

     return p;

 #else  // defined(_LP64) || defined(_GNU_SOURCE)

   return ::readdir_r(dirp, dbuf);

 #endif // defined(_LP64) || defined(_GNU_SOURCE)

 }

 inline int os::closedir(DIR *dirp)

 {

   assert(dirp != NULL, "just checking");

   return ::closedir(dirp);

 }

 //////////////////////////////////////////////////////////////////////////////

 ////////////////////////////////////////////////////////////////////////////////

 // macros for interruptible io and system calls and system call restarting

 #define _INTERRUPTIBLE(_setup, _cmd, _result, _thread, _clear, _before, _after, _int_enable) \

 do { \

   _setup; \

   _before; \

   OSThread* _osthread = _thread->osthread(); \

   if (_int_enable && _thread->has_last_Java_frame()) { \

     /* this is java interruptible io stuff */ \

     if (os::is_interrupted(_thread, _clear))  { \

       os::Solaris::bump_interrupted_before_count(); \

       _result = OS_INTRPT; \

     } else { \

       /* _cmd always expands to an assignment to _result */ \

       if ((_cmd) < 0 && errno == EINTR  \

        && os::is_interrupted(_thread, _clear)) { \

         os::Solaris::bump_interrupted_during_count(); \

         _result = OS_INTRPT; \

       } \

     } \

   } else { \

     /* this is normal blocking io stuff */ \

     _cmd; \

   } \

   _after; \

 } while(false)

 // Interruptible io support + restarting of interrupted system calls

 #ifndef ASSERT

 #define INTERRUPTIBLE(_cmd, _result, _clear) do { \

   _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO); \

 } while((_result == OS_ERR) && (errno == EINTR))

 #else

 // This adds an assertion that it is only called from thread_in_native

 // The call overhead is skipped for performance in product mode

 #define INTERRUPTIBLE(_cmd, _result, _clear) do { \

   _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO ); \

 } while((_result == OS_ERR) && (errno == EINTR))

 #endif

 // Used for calls from _thread_in_vm, not from _thread_in_native

 #define INTERRUPTIBLE_VM(_cmd, _result, _clear) do { \

   _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible(_thread), UseVMInterruptibleIO ); \

 } while((_result == OS_ERR) && (errno == EINTR))

 /* Use NORESTART when the system call cannot return EINTR, when something other

    than a system call is being invoked, or when the caller must do EINTR

    handling. */

 #ifndef ASSERT

 #define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \

   _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO)

 #else

 // This adds an assertion that it is only called from thread_in_native

 // The call overhead is skipped for performance in product mode

 #define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \

   _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO )

 #endif

 // Don't attend to UseVMInterruptibleIO. Always allow interruption.

 // Also assumes that it is called from the _thread_blocked state.

 // Used by os_sleep().

 #define INTERRUPTIBLE_NORESTART_VM_ALWAYS(_cmd, _result, _thread, _clear) \

   _INTERRUPTIBLE(os::Solaris::setup_interruptible_already_blocked(_thread), _result = _cmd, _result, _thread, _clear, , , true )

 #define INTERRUPTIBLE_RETURN_INT(_cmd, _clear) do { \

   int _result; \

   do { \

     INTERRUPTIBLE(_cmd, _result, _clear); \

   } while((_result == OS_ERR) && (errno == EINTR)); \

   return _result; \

 } while(false)

 #define INTERRUPTIBLE_RETURN_INT_VM(_cmd, _clear) do { \

   int _result; \

   do { \

     INTERRUPTIBLE_VM(_cmd, _result, _clear); \

   } while((_result == OS_ERR) && (errno == EINTR)); \

   return _result; \

 } while(false)

 #define INTERRUPTIBLE_RETURN_INT_NORESTART(_cmd, _clear) do { \

   int _result; \

   INTERRUPTIBLE_NORESTART(_cmd, _result, _clear); \

   return _result; \

 } while(false)

 /* Use the RESTARTABLE macros when interruptible io is not needed */

 #define RESTARTABLE(_cmd, _result) do { \

   do { \

     _result = _cmd; \

   } while((_result == OS_ERR) && (errno == EINTR)); \

 } while(false)

 #define RESTARTABLE_RETURN_INT(_cmd) do { \

   int _result; \

   RESTARTABLE(_cmd, _result); \

   return _result; \

 } while(false)

 inline bool os::numa_has_static_binding()   { return false; }

 inline bool os::numa_has_group_homing()     { return true;  }