/*

 * Copyright 1997-2007 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)