diff --git a/nsprpub/config/BeOS.mk b/nsprpub/config/BeOS.mk
new file mode 100644
index 00000000000..93c56f35dce
--- /dev/null
+++ b/nsprpub/config/BeOS.mk
@@ -0,0 +1,121 @@
+#
+# The contents of this file are subject to the Netscape Public License
+# Version 1.0 (the "NPL"); you may not use this file except in
+# compliance with the NPL.  You may obtain a copy of the NPL at
+# http://www.mozilla.org/NPL/
+# 
+# Software distributed under the NPL is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+# for the specific language governing rights and limitations under the
+# NPL.
+# 
+# The Initial Developer of this code under the NPL is Netscape
+# Communications Corporation.  Portions created by Netscape are
+# Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+# Reserved.
+#
+
+######################################################################
+# Config stuff for BeOS (all architectures)
+######################################################################
+
+######################################################################
+# Version-independent
+######################################################################
+
+DEFINES			+= 
+XP_DEFINE		= -DXP_BEOS
+
+OBJ_SUFFIX              = o
+LIB_SUFFIX              = a
+DLL_SUFFIX              = so
+AR                      = ar cr $@
+
+ifdef BUILD_OPT
+DEFINES                 = -UDEBUG -DNDEBUG
+OBJDIR_TAG              = _OPT
+else
+DEFINES                 = -DDEBUG -UNDEBUG
+OBJDIR_TAG              = _DBG
+endif
+
+ifeq (PC,$(findstring PC,$(OS_TEST)))
+CPU_ARCH		= x86
+CC                      = gcc
+CCC                     = g++
+LD                      = gcc
+RANLIB                  = ranlib
+DSO_LDOPTS              = -nostart
+PORT_FLAGS		= -DHAVE_STRERROR
+ifdef BUILD_OPT
+OPTIMIZER		= -O2
+LDFLAGS			+= -s
+else
+OPTIMIZER		= -gdwarf-2 -O0
+endif
+else
+CPU_ARCH		= ppc
+CC                      = mwcc
+CCC                     = mwcc
+LD                      = mwld
+RANLIB                  = ranlib
+DSO_LDOPTS              = -xms -export pragma \
+					-init _init_routine_ \
+					-term _term_routine_ \
+					-lroot -lnet \
+					/boot/develop/lib/ppc/glue-noinit.a \
+					/boot/develop/lib/ppc/init_term_dyn.o \
+					/boot/develop/lib/ppc/start_dyn.o 
+
+PORT_FLAGS		= -DHAVE_STRERROR -D_POSIX_SOURCE
+ifdef BUILD_OPT
+OPTIMIZER		= -O2
+else
+OPTIMIZER		= -g -O0
+endif
+endif
+CPU_ARCH_TAG		= _$(CPU_ARCH)
+
+OS_INCLUDES		=  -I- -I. 
+#G++INCLUDES		= -I/usr/include/g++
+
+PLATFORM_FLAGS		= -DBeOS -DBEOS $(OS_INCLUDES)
+
+OS_CFLAGS		= $(DSO_CFLAGS) $(PLATFORM_FLAGS) $(PORT_FLAGS)
+
+USE_BTHREADS = 1
+
+MKSHLIB			= $(LD) $(DSO_LDOPTS)
+
+OBJDIR_NAME	= $(OS_CONFIG)_$(CPU_ARCH)$(OBJDIR_TAG).OBJ
+
+####################################################################
+#
+# One can define the makefile variable NSDISTMODE to control
+# how files are published to the 'dist' directory.  If not
+# defined, the default is "install using relative symbolic
+# links".  The two possible values are "copy", which copies files
+# but preserves source mtime, and "absolute_symlink", which
+# installs using absolute symbolic links.  The "absolute_symlink"
+# option requires NFSPWD.
+#
+####################################################################
+
+NSINSTALL       = $(MOD_DEPTH)/config/$(OBJDIR_NAME)/nsinstall
+
+ifeq ($(NSDISTMODE),copy)
+# copy files, but preserve source mtime
+INSTALL         = $(NSINSTALL) -t
+else
+ifeq ($(NSDISTMODE),absolute_symlink)
+# install using absolute symbolic links
+INSTALL         = $(NSINSTALL) -L `$(NFSPWD)`
+else
+# install using relative symbolic links
+INSTALL         = $(NSINSTALL) -R
+endif
+endif
+
+define MAKE_OBJDIR
+if test ! -d $(@D); then rm -rf $(@D); $(NSINSTALL) -D $(@D); fi
+endef
diff --git a/nsprpub/pr/include/md/_beos.cfg b/nsprpub/pr/include/md/_beos.cfg
new file mode 100644
index 00000000000..38af63daa73
--- /dev/null
+++ b/nsprpub/pr/include/md/_beos.cfg
@@ -0,0 +1,128 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * http://www.mozilla.org/NPL/
+ * 
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ * 
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+#ifndef nspr_cpucfg___
+#define nspr_cpucfg___
+
+#ifndef XP_BEOS
+#define XP_BEOS
+#undef XP_UNIX
+#endif
+
+#ifndef BEOS
+#define BEOS
+#endif
+
+#ifdef __powerpc__
+#undef  IS_LITTLE_ENDIAN
+#define IS_BIG_ENDIAN 1
+#else
+#define IS_LITTLE_ENDIAN 1
+#undef  IS_BIG_ENDIAN
+#endif
+
+#define PR_BYTES_PER_BYTE   1
+#define PR_BYTES_PER_SHORT  2
+#define PR_BYTES_PER_INT    4
+#define PR_BYTES_PER_INT64  8
+#define PR_BYTES_PER_LONG   4
+#define PR_BYTES_PER_FLOAT  4
+#define PR_BYTES_PER_DOUBLE 8
+#define PR_BYTES_PER_WORD   4
+#define PR_BYTES_PER_DWORD  8
+#define PR_BYTES_PER_WORD_LOG2   2
+#define PR_BYTES_PER_DWORD_LOG2  3
+
+#define PR_BITS_PER_BYTE    8
+#define PR_BITS_PER_SHORT   16
+#define PR_BITS_PER_INT     32
+#define PR_BITS_PER_INT64   64
+#define PR_BITS_PER_LONG    32
+#define PR_BITS_PER_FLOAT   32
+#define PR_BITS_PER_DOUBLE  64
+#define PR_BITS_PER_WORD    32
+
+#define PR_BITS_PER_BYTE_LOG2   3
+#define PR_BITS_PER_SHORT_LOG2  4
+#define PR_BITS_PER_INT_LOG2    5
+#define PR_BITS_PER_INT64_LOG2  6
+#define PR_BITS_PER_LONG_LOG2   5
+#define PR_BITS_PER_FLOAT_LOG2  5
+#define PR_BITS_PER_DOUBLE_LOG2 6
+#define PR_BITS_PER_WORD_LOG2   5
+
+#define PR_ALIGN_OF_SHORT   2
+#define PR_ALIGN_OF_INT     4
+#define PR_ALIGN_OF_LONG    4
+#define PR_ALIGN_OF_INT64   4
+#define PR_ALIGN_OF_FLOAT   4
+#define PR_ALIGN_OF_DOUBLE  4
+#define PR_ALIGN_OF_POINTER 4
+
+#define	HAVE_LONG_LONG
+/*
+ * XXX These two macros need to be investigated for different architectures.
+ */
+#define	HAVE_ALIGNED_DOUBLES
+#define	HAVE_ALIGNED_LONGLONGS
+
+#ifndef NO_NSPR_10_SUPPORT
+
+#define BYTES_PER_BYTE		PR_BYTES_PER_BYTE
+#define BYTES_PER_SHORT 	PR_BYTES_PER_SHORT
+#define BYTES_PER_INT 		PR_BYTES_PER_INT
+#define BYTES_PER_INT64		PR_BYTES_PER_INT64
+#define BYTES_PER_LONG		PR_BYTES_PER_LONG
+#define BYTES_PER_FLOAT		PR_BYTES_PER_FLOAT
+#define BYTES_PER_DOUBLE	PR_BYTES_PER_DOUBLE
+#define BYTES_PER_WORD		PR_BYTES_PER_WORD
+#define BYTES_PER_DWORD		PR_BYTES_PER_DWORD
+
+#define BITS_PER_BYTE		PR_BITS_PER_BYTE
+#define BITS_PER_SHORT		PR_BITS_PER_SHORT
+#define BITS_PER_INT		PR_BITS_PER_INT
+#define BITS_PER_INT64		PR_BITS_PER_INT64
+#define BITS_PER_LONG		PR_BITS_PER_LONG
+#define BITS_PER_FLOAT		PR_BITS_PER_FLOAT
+#define BITS_PER_DOUBLE		PR_BITS_PER_DOUBLE
+#define BITS_PER_WORD		PR_BITS_PER_WORD
+
+#define BITS_PER_BYTE_LOG2	PR_BITS_PER_BYTE_LOG2
+#define BITS_PER_SHORT_LOG2	PR_BITS_PER_SHORT_LOG2
+#define BITS_PER_INT_LOG2	PR_BITS_PER_INT_LOG2
+#define BITS_PER_INT64_LOG2	PR_BITS_PER_INT64_LOG2
+#define BITS_PER_LONG_LOG2	PR_BITS_PER_LONG_LOG2
+#define BITS_PER_FLOAT_LOG2	PR_BITS_PER_FLOAT_LOG2
+#define BITS_PER_DOUBLE_LOG2 	PR_BITS_PER_DOUBLE_LOG2
+#define BITS_PER_WORD_LOG2	PR_BITS_PER_WORD_LOG2
+
+#define ALIGN_OF_SHORT		PR_ALIGN_OF_SHORT
+#define ALIGN_OF_INT		PR_ALIGN_OF_INT
+#define ALIGN_OF_LONG		PR_ALIGN_OF_LONG
+#define ALIGN_OF_INT64		PR_ALIGN_OF_INT64
+#define ALIGN_OF_FLOAT		PR_ALIGN_OF_FLOAT
+#define ALIGN_OF_DOUBLE		PR_ALIGN_OF_DOUBLE
+#define ALIGN_OF_POINTER	PR_ALIGN_OF_POINTER
+#define ALIGN_OF_WORD		PR_ALIGN_OF_WORD
+
+#define BYTES_PER_WORD_LOG2	PR_BYTES_PER_WORD_LOG2
+#define BYTES_PER_DWORD_LOG2	PR_BYTES_PER_DWORD_LOG2
+#define WORDS_PER_DWORD_LOG2	PR_WORDS_PER_DWORD_LOG2
+
+#endif /* NO_NSPR_10_SUPPORT */
+
+#endif /* nspr_cpucfg___ */
diff --git a/nsprpub/pr/include/md/_beos.h b/nsprpub/pr/include/md/_beos.h
new file mode 100644
index 00000000000..ae430a7f993
--- /dev/null
+++ b/nsprpub/pr/include/md/_beos.h
@@ -0,0 +1,571 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ * 
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ * 
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+#ifndef nspr_beos_defs_h___
+#define nspr_beos_defs_h___
+
+#include "prtypes.h"
+#include "prio.h"
+#include "prthread.h"
+#include "prproces.h"
+#include "prmem.h"
+#include "obsolete/prsem.h"
+#include <errno.h>
+
+#include <support/SupportDefs.h>
+#include <kernel/OS.h>
+#include <dirent.h>
+
+/*
+ * Internal configuration macros
+ */
+
+#define PR_LINKER_ARCH	"beos"
+#define _PR_SI_SYSNAME  "BEOS"
+#ifdef __powerpc__
+#define _PR_SI_ARCHITECTURE "ppc"
+#else
+#define _PR_SI_ARCHITECTURE "x86"
+#endif
+#define PR_DLL_SUFFIX		".so"
+
+#define _PR_VMBASE              0x30000000
+#define _PR_STACK_VMBASE	0x50000000
+#define _MD_DEFAULT_STACK_SIZE	65536L
+#define _MD_MMAP_FLAGS          MAP_PRIVATE
+
+#undef	HAVE_STACK_GROWING_UP
+#define HAVE_DLL
+#define _PR_NO_CLOCK_TIMER
+
+/*
+ * The Atomic operations
+ */
+
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC _MD_AtomicInit
+#define _MD_ATOMIC_INCREMENT _MD_AtomicIncrement
+#define _MD_ATOMIC_ADD _MD_AtomicAdd
+#define _MD_ATOMIC_DECREMENT _MD_AtomicDecrement
+#define _MD_ATOMIC_SET _MD_AtomicSet
+
+#define HAVE_CVAR_BUILT_ON_SEM
+#define _PR_GLOBAL_THREADS_ONLY
+#define _PR_BTHREADS
+#define _PR_NEED_FAKE_POLL
+
+/* Define threading functions and objects as native BeOS */
+struct _MDThread {
+    thread_id	tid;	/* BeOS thread handle */
+    bool	is_joinable;	/* TRUE if PR_JOINABLE */
+    bool	is_joining;	/* TRUE if we were woken up to join */
+};
+
+struct _MDThreadStack {
+    PRInt8	notused;
+};
+
+/*
+ * Lock and Semaphore related definitions
+ */
+
+struct _MDLock {
+    sem_id semaphoreID;
+    int32  benaphoreCount;
+};
+
+struct _MDCVar {
+    sem_id sem1;
+    sem_id sem2;
+    int16  count;
+};
+
+struct _MDSemaphore {
+    sem_id sid;
+};
+
+/*
+** CPU-related definitions
+*/
+struct _MDCPU {
+    int8		unused;
+};
+
+/*
+** Process-related definitions
+*/
+struct _MDProcess {
+    pid_t pid;
+};
+
+struct _MDSegment {
+    PRInt8 notused;
+};
+
+/*
+** File- and directory-related definitions
+*/
+
+#define BE_SOCK_SHUTDOWN_READ	0x01
+#define BE_SOCK_SHUTDOWN_WRITE	0x02
+
+struct _MDFileDesc {
+    PRInt32	osfd;
+    PRInt32	sock_state;
+    PRBool	accepted_socket;
+    PRNetAddr	peer_addr;
+    PRBool	connectValueValid;
+    int		connectReturnValue;
+    int		connectReturnError;
+};
+
+struct _MDDir {
+    DIR		*d;
+};
+
+#define PR_DIRECTORY_SEPARATOR		'/'
+#define PR_DIRECTORY_SEPARATOR_STR	"/"
+#define PR_PATH_SEPARATOR		':'
+#define PR_PATH_SEPARATOR_STR		":"
+
+#undef HAVE_SOCKET_REUSEADDR
+#undef HAVE_SOCKET_KEEPALIVE
+
+#define GETTIMEOFDAY(tp)	gettimeofday((tp), NULL)
+
+/* --- Memory-mapped files stuff --- not implemented on BeOS */
+
+struct _MDFileMap {
+    PRInt8 unused;
+};
+
+/*
+ * Network related definitions.
+ */
+
+#define IPPROTO_IP 0
+#define AF_UNIX 2
+#define TCP_NODELAY SO_NONBLOCK
+#define SO_LINGER -1
+#define SO_ERROR 4
+
+#define _PR_INTERRUPT_CHECK_INTERVAL_SECS 5
+
+/* these aren't actually used. if they are, we're screwed */
+struct  protoent {
+    char    *p_name;        /* official protocol name */
+    char    **p_aliases;    /* alias list */
+    int     p_proto;        /* protocol # */
+};
+
+struct protoent* getprotobyname(const char* name);
+struct protoent* getprotobynumber(int number);
+
+/*
+ * malloc() related definitions.
+ */
+
+#undef _PR_OVERRIDE_MALLOC
+
+/* Miscellaneous */
+
+#define _MD_ERRNO()             (errno)
+
+#define _MD_CLEANUP_BEFORE_EXIT _MD_cleanup_before_exit
+#define _MD_EXIT _MD_exit
+
+#define _MD_GET_ENV getenv
+#define _MD_PUT_ENV putenv
+
+#define _MD_EARLY_INIT _MD_early_init
+#define _MD_FINAL_INIT _MD_final_init
+
+/* CPU Stuff */
+
+#define _MD_INIT_CPUS _MD_init_cpus
+#define _MD_WAKEUP_CPUS _MD_wakeup_cpus
+#define _MD_START_INTERRUPTS _MD_start_interrupts
+#define _MD_STOP_INTERRUPTS _MD_stop_interrupts
+#define _MD_DISABLE_CLOCK_INTERRUPTS _MD_disable_clock_interrupts
+#define _MD_BLOCK_CLOCK_INTERRUPTS _MD_block_clock_interrupts
+#define _MD_UNBLOCK_CLOCK_INTERRUPTS _MD_unblock_clock_interrupts
+#define _MD_CLOCK_INTERRUPT _MD_clock_interrupt
+#define _MD_INIT_STACK _MD_init_stack
+#define _MD_CLEAR_STACK _MD_clear_stack
+// #define _MD_GET_INTSOFF _MD_get_intsoff
+// #define _MD_SET_INTSOFF _MD_set_intsoff
+#define _MD_CURRENT_CPU _MD_current_cpu
+#define _MD_SET_CURRENT_CPU _MD_set_current_cpu
+#define _MD_INIT_RUNNING_CPU _MD_init_running_cpu
+#define _MD_PAUSE_CPU _MD_pause_cpu
+
+/* Thread stuff */
+
+#define _MD_CURRENT_THREAD() PR_GetCurrentThread()
+// #define _MD_GET_ATTACHED_THREAD _MD_get_attached_thread
+#define _MD_LAST_THREAD _MD_last_thread
+#define _MD_SET_CURRENT_THREAD _MD_set_current_THREAD
+#define _MD_SET_LAST_THREAD _MD_set_last_thread
+#define _MD_INIT_THREAD _MD_init_thread
+#define _MD_EXIT_THREAD _MD_exit_thread
+#define _MD_INIT_ATTACHED_THREAD _MD_init_attached_thread
+
+#define _MD_SUSPEND_THREAD _MD_suspend_thread
+#define _MD_RESUME_THREAD _MD_resume_thread
+#define _MD_SUSPEND_CPU _MD_suspend_cpu
+#define _MD_RESUME_CPU _MD_resume_cpu
+#define _MD_BEGIN_SUSPEND_ALL _MD_begin_suspend_all
+#define _MD_END_SUSPEND_ALL _MD_end_suspend_all
+#define _MD_BEGIN_RESUME_ALL _MD_begin_resume_all
+#define _MD_END_RESUME_ALL _MD_end_resume_all
+
+#define _MD_GET_SP _MD_get_sp
+
+#define _MD_CLEAN_THREAD _MD_clean_thread
+#define _MD_CREATE_PRIMORDIAL_USER_THREAD _MD_create_primordial_user_thread
+#define _MD_CREATE_USER_THREAD _MD_create_user_thread
+#define _MD_INIT_PRIMORDIAL_THREAD _MD_init_primordial_thread
+#define _MD_CREATE_THREAD _MD_create_thread
+#define _MD_YIELD _MD_yield
+#define _MD_SET_PRIORITY _MD_set_priority
+
+#define _MD_SUSPENDALL _MD_suspendall
+#define _MD_RESUMEALL _MD_resumeall
+
+#define _MD_SWITCH_CONTEXT _MD_switch_context
+#define _MD_RESTORE_CONTEXT _MD_restore_context
+
+#define _MD_WAIT _MD_wait
+#define _MD_WAKEUP_WAITER _MD_wakeup_waiter
+
+#define _MD_SETTHREADAFFINITYMASK _MD_setthreadaffinitymask
+#define _MD_GETTHREADAFFINITYMASK _MD_getthreadaffinitymask
+
+/* Thread Synchronization */
+
+#define _MD_INIT_LOCKS _MD_init_locks
+#define _MD_NEW_LOCK _MD_new_lock
+#define _MD_FREE_LOCK _MD_free_lock
+#define _MD_LOCK _MD_lock
+#define _MD_TEST_AND_LOCK _MD_test_and_lock
+#define _MD_UNLOCK _MD_unlock
+#define _MD_IOQ_LOCK _MD_ioq_lock
+#define _MD_IOQ_UNLOCK _MD_ioq_unlock
+#define _MD_NEW_SEM _MD_new_sem
+#define _MD_DESTROY_SEM _MD_destroy_sem
+#define _MD_TIMED_WAIT_SEM _MD_timed_wait_sem
+#define _MD_WAIT_SEM _MD_wait_sem
+#define _MD_POST_SEM _MD_post_sem
+// #define _MD_NEW_CV _MD_new_cv
+// #define _MD_FREE_CV _MD_free_cv
+// #define _MD_WAIT_CV _MD_wait_cv
+// #define _MD_NOTIFY_CV _MD_notify_cv
+// #define _MD_NOTIFYALL_CV _MD_notifyall_cv
+
+/* File I/O */
+
+/* don't need any I/O initializations */
+#define _MD_INIT_IO()
+#define _MD_INIT_FILEDESC(fd)
+
+#define _MD_OPEN_DIR _MD_open_dir
+#define _MD_READ_DIR _MD_read_dir
+#define _MD_CLOSE_DIR _MD_close_dir
+#define _MD_MAKE_NONBLOCK _MD_make_nonblock
+#define _MD_OPEN _MD_open
+#define _MD_CLOSE_FILE _MD_close_file
+#define _MD_READ _MD_read
+#define _MD_WRITE _MD_write
+#define _MD_WRITEV _MD_writev
+#define _MD_LSEEK _MD_lseek
+#define _MD_LSEEK64 _MD_lseek64
+#define _MD_FSYNC _MD_fsync
+#define _MD_DELETE _MD_delete
+#define _MD_GETFILEINFO _MD_getfileinfo
+#define _MD_GETFILEINFO64 _MD_getfileinfo64
+#define _MD_GETOPENFILEINFO _MD_getopenfileinfo
+#define _MD_GETOPENFILEINFO64 _MD_getopenfileinfo64
+#define _MD_RENAME _MD_rename
+#define _MD_ACCESS _MD_access
+#define _MD_STAT stat
+#define _MD_MKDIR _MD_mkdir
+#define _MD_RMDIR _MD_rmdir
+#define _MD_PR_POLL _MD_pr_poll
+
+/* Network I/O */
+
+#define _MD_CLOSE_SOCKET _MD_close_socket
+#define _MD_CONNECT _MD_connect
+#define _MD_ACCEPT _MD_accept
+#define _MD_BIND _MD_bind
+#define _MD_LISTEN _MD_listen
+#define _MD_SHUTDOWN _MD_shutdown
+#define _MD_RECV _MD_recv
+#define _MD_SEND _MD_send
+#define _MD_ACCEPT_READ _MD_accept_read
+#define _MD_TRANSMITFILE _MD_transmitfile
+#define _MD_GETSOCKNAME _MD_getsockname
+#define _MD_GETPEERNAME _MD_getpeername
+#define _MD_GETSOCKOPT _MD_getsockopt
+#define _MD_SETSOCKOPT _MD_setsockopt
+#define _MD_RECVFROM _MD_recvfrom
+#define _MD_SENDTO _MD_sendto
+#define _MD_SOCKETPAIR _MD_socketpair
+#define _MD_SOCKET _MD_socket
+#define _MD_SOCKETAVAILABLE _MD_socketavailable
+
+#define _MD_GET_SOCKET_ERROR()	(errno)
+#define _MD_GETHOSTNAME _MD_gethostname
+
+#define _MD_SELECT select
+
+/* Process management */
+
+#define _MD_CREATE_PROCESS _MD_create_process
+#define _MD_DETACH_PROCESS _MD_detach_process
+#define _MD_WAIT_PROCESS _MD_wait_process
+#define _MD_KILL_PROCESS _MD_kill_process
+
+/* Atomic data operations */
+
+// #define _MD_INIT_ATOMIC _MD_init_atomic
+// #define _MD_ATOMIC_INCREMENT _MD_atomic_increment
+// #define _MD_ATOMIC_DECREMENT _MD_atomic_decrement
+// #define _MD_ATOMIC_SET _MD_atomic_set
+
+/* memory management */
+
+#define _MD_INIT_SEGS _MD_init_segs
+#define _MD_ALLOC_SEGMENT _MD_alloc_segment
+#define _MD_FREE_SEGMENT _MD_free_segment
+
+/* Memory mapped file I/O */
+
+#define _MD_CREATE_FILE_MAP _MD_create_file_map
+#define _MD_MEM_MAP _MD_mem_map
+#define _MD_MEM_UNMAP _MD_mem_unmap
+#define _MD_CLOSE_FILE_MAP _MD_close_file_map
+
+/* Time related */
+
+#define _MD_NOW _MD_now
+#define _MD_INTERVAL_INIT _MD_interval_init
+#define _MD_GET_INTERVAL _MD_get_interval
+#define _MD_INTERVAL_PER_SEC _MD_interval_per_sec
+
+/* File locking */
+
+#define _MD_LOCKFILE _MD_lockfile
+#define _MD_TLOCKFILE _MD_tlockfile
+#define _MD_UNLOCKFILE _MD_unlockfile
+
+/**
+ * Prototypes for machine dependent function implementations. (Too bad
+ * NSPR's MD system blows so much that we have to reiterate every stinking
+ * thing we implement here in our MD header file.)
+ */
+
+/* Miscellaneous */
+
+PR_EXTERN(void) _MD_cleanup_before_exit(void);
+PR_EXTERN(void) _MD_exit(PRIntn status);
+
+PR_EXTERN(char*) _MD_get_env(const char *name);
+PR_EXTERN(PRIntn) _MD_put_env(const char *name);
+
+PR_EXTERN(void) _MD_early_init(void);
+PR_EXTERN(void) _MD_final_init(void);
+
+/* CPU Stuff */
+
+PR_EXTERN(void) _MD_init_cpus();
+PR_EXTERN(void) _MD_wakeup_cpus();
+PR_EXTERN(void) _MD_start_interrupts(void);
+PR_EXTERN(void) _MD_stop_interrupts(void);
+PR_EXTERN(void) _MD_disable_clock_interrupts(void);
+PR_EXTERN(void) _MD_block_clock_interrupts(void);
+PR_EXTERN(void) _MD_unblock_clock_interrupts(void);
+PR_EXTERN(void) _MD_clock_interrupt(void);
+// PR_EXTERN(void) _MD_init_stack(PRThreadStack *ts, PRIntn redzone);
+// PR_EXTERN(void) _MD_clear_stack(PRThreadStack* ts);
+// PR_EXTERN(PRInt32) _MD_get_intsoff(void);
+// PR_EXTERN(void) _MD_set_intsoff(PRInt32 _val);
+// PR_EXTERN(_PRCPU*) _MD_current_cpu(void);
+// PR_EXTERN(void) _MD_set_current_cpu(_PRCPU *cpu);
+// PR_EXTERN(void) _MD_init_running_cpu(_PRCPU *cpu);
+PR_EXTERN(PRInt32) _MD_pause_cpu(PRIntervalTime timeout);
+
+/* Thread stuff */
+
+// PR_EXTERN(PRThread*) _MD_current_thread(void);
+PR_EXTERN(PRThread*) _MD_get_attached_thread(void);
+PR_EXTERN(PRThread*) _MD_last_thread(void);
+PR_EXTERN(void) _MD_set_current_thread(PRThread *thread);
+PR_EXTERN(void) _MD_set_last_thread(PRThread *thread);
+PR_EXTERN(PRStatus) _MD_init_thread(PRThread *thread);
+PR_EXTERN(void) _MD_exit_thread(PRThread *thread);
+PR_EXTERN(PRStatus) _MD_init_attached_thread(PRThread *thread);
+
+PR_EXTERN(void) _MD_suspend_thread(PRThread *thread);
+PR_EXTERN(void) _MD_resume_thread(PRThread *thread);
+// PR_EXTERN(void) _MD_suspend_cpu(_PRCPU  *cpu);
+// PR_EXTERN(void) _MD_resume_cpu(_PRCPU  *cpu);
+PR_EXTERN(void) _MD_begin_suspend_all(void);
+PR_EXTERN(void) _MD_end_suspend_all(void);
+PR_EXTERN(void) _MD_begin_resume_all(void);
+PR_EXTERN(void) _MD_end_resume_all(void);
+
+PR_EXTERN(void *) _MD_get_sp(PRThread *thread);
+
+PR_EXTERN(void) _MD_clean_thread(PRThread *thread);
+PR_EXTERN(void) _MD_create_primordial_user_thread(PRThread *);
+PR_EXTERN(PRThread*) _MD_create_user_thread(PRUint32 stacksize, void (*start)(void *), void *arg);
+PR_EXTERN(void) _MD_init_primordial_thread(PRThread *thread);
+PR_EXTERN(PRStatus) _MD_create_thread(PRThread *thread, void (*start)(void *), PRThreadPriority priority, PRThreadScope scope, PRThreadState state, PRUint32 stackSize);
+PR_EXTERN(void) _MD_yield(void);
+PR_EXTERN(void) _MD_set_priority(struct _MDThread *md, PRThreadPriority newPri);
+
+PR_EXTERN(void) _MD_suspendall(void);
+PR_EXTERN(void) _MD_resumeall(void);
+
+PR_EXTERN(void) _MD_init_context(PRThread *thread, char *top, void (*start) (void), PRBool *status);
+PR_EXTERN(void) _MD_switch_context(PRThread *thread);
+PR_EXTERN(void) _MD_restore_context(PRThread *thread);
+
+PR_EXTERN(PRStatus) _MD_wait(PRThread *, PRIntervalTime timeout);
+PR_EXTERN(PRStatus) _MD_wakeup_waiter(PRThread *);
+
+PR_EXTERN(PRInt32) _MD_setthreadaffinitymask(PRThread *thread, PRUint32 mask );
+PR_EXTERN(PRInt32) _MD_getthreadaffinitymask(PRThread *thread, PRUint32 *mask);
+
+/* Thread Synchronization */
+
+PR_EXTERN(void) _MD_init_locks(void);
+PR_EXTERN(PRStatus) _MD_new_lock(struct _MDLock *md);
+PR_EXTERN(void) _MD_free_lock(struct _MDLock *md);
+PR_EXTERN(void) _MD_lock(struct _MDLock *md);
+PR_EXTERN(PRBool) _MD_test_and_lock(struct _MDLock *md);
+PR_EXTERN(void) _MD_unlock(struct _MDLock *md);
+PR_EXTERN(void) _MD_ioq_lock(void);
+PR_EXTERN(void) _MD_ioq_unlock(void);
+PR_EXTERN(void) _MD_new_sem(struct _MDSemaphore *md, PRUintn value);
+PR_EXTERN(void) _MD_destroy_sem(struct _MDSemaphore *md);
+PR_EXTERN(PRStatus) _MD_timed_wait_sem(struct _MDSemaphore *md, PRIntervalTime timeout);
+PR_EXTERN(PRStatus) _MD_wait_sem(struct _MDSemaphore *md);
+PR_EXTERN(void) _MD_post_sem(struct _MDSemaphore *md);
+// PR_EXTERN(PRInt32) _MD_new_cv(struct _MDCVar *md);
+// PR_EXTERN(void) _MD_free_cv(struct _MDCVar *md);
+// PR_EXTERN(void) _MD_wait_cv(struct _MDCVar *mdCVar, struct _MDLock *mdLock, PRIntervalTime timeout);
+// PR_EXTERN(void) _MD_notify_cv(struct _MDCVar *md, struct _MDLock *lock);
+// PR_EXTERN(void) _MD_notifyall_cv(struct _MDCVar *md, struct _MDLock *lock);
+
+/* File I/O */
+
+// PR_EXTERN(void) _MD_init_io(void);
+PR_EXTERN(PRStatus) _MD_open_dir(struct _MDDir *md,const char *name);
+PR_EXTERN(char *) _MD_read_dir(struct _MDDir *md, PRIntn flags);
+PR_EXTERN(PRInt32) _MD_close_dir(struct _MDDir *md);
+PR_EXTERN(void) _MD_make_nonblock(PRFileDesc *fd);
+PR_EXTERN(PRInt32) _MD_open(const char *name, PRIntn osflags, PRIntn mode);
+PR_EXTERN(PRInt32) _MD_close_file(PRInt32 osfd);
+PR_EXTERN(PRInt32) _MD_read(PRFileDesc *fd, void *buf, PRInt32 amount);
+PR_EXTERN(PRInt32) _MD_write(PRFileDesc *fd, const void *buf, PRInt32 amount);
+PR_EXTERN(PRInt32) _MD_writev(PRFileDesc *fd, struct PRIOVec *iov, PRInt32 iov_size, PRIntervalTime timeout);
+PR_EXTERN(PRInt32) _MD_lseek(PRFileDesc *fd, PRInt32 offset, int whence);
+PR_EXTERN(PRInt64) _MD_lseek64(PRFileDesc *fd, PRInt64 offset, int whence);
+PR_EXTERN(PRInt32) _MD_fsync(PRFileDesc *fd);
+PR_EXTERN(PRInt32) _MD_delete(const char *name);
+PR_EXTERN(PRInt32) _MD_getfileinfo(const char *fn, PRFileInfo *info);
+PR_EXTERN(PRInt32) _MD_getfileinfo64(const char *fn, PRFileInfo64 *info);
+PR_EXTERN(PRInt32) _MD_getopenfileinfo(const PRFileDesc *fd, PRFileInfo *info);
+PR_EXTERN(PRInt32) _MD_getopenfileinfo64(const PRFileDesc *fd, PRFileInfo64 *info);
+PR_EXTERN(PRInt32) _MD_rename(const char *from, const char *to);
+PR_EXTERN(PRInt32) _MD_access(const char *name, PRIntn how);
+PR_EXTERN(PRInt32) _MD_stat(const char *name, struct stat *buf);
+PR_EXTERN(PRInt32) _MD_mkdir(const char *name, PRIntn mode);
+PR_EXTERN(PRInt32) _MD_rmdir(const char *name);
+PR_EXTERN(PRInt32) _MD_pr_poll(PRPollDesc *pds, PRIntn npds, PRIntervalTime timeout);
+
+/* Network I/O */
+PR_EXTERN(PRInt32) _MD_close_socket(PRInt32 osfd);
+PR_EXTERN(PRInt32) _MD_connect(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout);
+PR_EXTERN(PRInt32) _MD_accept(PRFileDesc *fd, PRNetAddr *addr, PRUint32 *addrlen, PRIntervalTime timeout);
+PR_EXTERN(PRInt32) _MD_bind(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen);
+PR_EXTERN(PRInt32) _MD_listen(PRFileDesc *fd, PRIntn backlog);
+PR_EXTERN(PRInt32) _MD_shutdown(PRFileDesc *fd, PRIntn how);
+PR_EXTERN(PRInt32) _MD_recv(PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags, PRIntervalTime timeout);
+PR_EXTERN(PRInt32) _MD_send(PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags, PRIntervalTime timeout);
+PR_EXTERN(PRInt32) _MD_accept_read(PRFileDesc *sd, PRInt32 *newSock, PRNetAddr **raddr, void *buf, PRInt32 amount, PRIntervalTime timeout);
+// PR_EXTERN(PRInt32) _MD_fast_accept(PRFileDesc *fd, PRNetAddr *addr, PRUint32 *addrlen, PRIntervalTime timeout, PRBool fast, _PR_AcceptTimeoutCallback callback, void *callbackArg);
+// PR_EXTERN(PRInt32) _MD_fast_accept_read(PRFileDesc *sd, PRInt32 *newSock, PRNetAddr **raddr, void *buf, PRInt32 amount, PRIntervalTime timeout, PRBool fast, _PR_AcceptTimeoutCallback callback, void *callbackArg);
+// PR_EXTERN(void) _MD_update_accept_context(PRInt32 s, PRInt32 ls);
+PR_EXTERN(PRInt32) _MD_transmitfile(PRFileDesc *sock, PRFileDesc *file, const void *headers, PRInt32 hlen, PRInt32 flags, PRIntervalTime timeout);
+PR_EXTERN(PRStatus) _MD_getsockname(PRFileDesc *fd, PRNetAddr *addr, PRUint32 *addrlen);
+PR_EXTERN(PRStatus) _MD_getpeername(PRFileDesc *fd, PRNetAddr *addr, PRUint32 *addrlen);
+PR_EXTERN(PRStatus) _MD_getsockopt(PRFileDesc *fd, PRInt32 level, PRInt32 optname, char* optval, PRInt32* optlen);
+PR_EXTERN(PRStatus) _MD_setsockopt(PRFileDesc *fd, PRInt32 level, PRInt32 optname, const char* optval, PRInt32 optlen);
+PR_EXTERN(PRInt32) _MD_recvfrom(PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags, PRNetAddr *addr, PRUint32 *addrlen, PRIntervalTime timeout);
+PR_EXTERN(PRInt32) _MD_sendto(PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags, const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout);
+PR_EXTERN(PRInt32) _MD_socketpair(int af, int type, int flags, PRInt32 *osfd);
+PR_EXTERN(PRInt32) _MD_socket(int af, int type, int flags);
+PR_EXTERN(PRInt32) _MD_socketavailable(PRFileDesc *fd);
+
+// PR_EXTERN(PRInt32) _MD_get_socket_error(void);
+PR_EXTERN(PRStatus) _MD_gethostname(char *name, PRUint32 namelen);
+
+/* Process management */
+
+PR_EXTERN(PRProcess *) _MD_create_process(const char *path, char *const *argv, char *const *envp, const PRProcessAttr *attr);
+PR_EXTERN(PRStatus) _MD_detach_process(PRProcess *process);
+PR_EXTERN(PRStatus) _MD_wait_process(PRProcess *process, PRInt32 *exitCode);
+PR_EXTERN(PRStatus) _MD_kill_process(PRProcess *process);
+
+/* Atomic data operations */
+
+// PR_EXTERN(void) _MD_init_atomic(void);
+// PR_EXTERN(PRInt32) _MD_atomic_increment(PRInt32 *);
+// PR_EXTERN(PRInt32) _MD_atomic_decrement(PRInt32 *);
+// PR_EXTERN(PRInt32) _MD_atomic_set(PRInt32 *, PRInt32);
+
+/* Memory management */
+
+PR_EXTERN(void) _MD_init_segs(void);
+PR_EXTERN(PRStatus) _MD_alloc_segment(PRSegment *seg, PRUint32 size, void *vaddr);
+PR_EXTERN(void) _MD_free_segment(PRSegment *seg);
+
+/* Memory mapped file I/O */
+
+PR_EXTERN(PRStatus) _MD_create_file_map(PRFileMap *fmap, PRInt64 size);
+PR_EXTERN(void *) _MD_mem_map(PRFileMap *fmap, PRInt64 offset, PRUint32 len);
+PR_EXTERN(PRStatus) _MD_mem_unmap(void *addr, PRUint32 size);
+PR_EXTERN(PRStatus) _MD_close_file_map(PRFileMap *fmap);
+
+/* Time related */
+
+PR_EXTERN(PRTime) _MD_now(void);
+PR_EXTERN(void) _MD_interval_init(void);
+PR_EXTERN(PRIntervalTime) _MD_get_interval(void);
+PR_EXTERN(PRIntervalTime) _MD_interval_per_sec(void);
+
+/* File locking */
+
+PR_EXTERN(PRStatus) _MD_lockfile(PRInt32 osfd);
+PR_EXTERN(PRStatus) _MD_tlockfile(PRInt32 osfd);
+PR_EXTERN(PRStatus) _MD_unlockfile(PRInt32 osfd);
+
+#endif /* _nspr_beos_defs_h___*/