Initial revision

33 files changed, 1702 insertions, 0 deletions

diff --git a/libports/allocate-port.c b/libports/allocate-port.c
new file mode 100644
index 00000000..03839635
--- /dev/null
+++ b/libports/allocate-port.c
@@ -0,0 +1,80 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <assert.h>
+#include <cthreads.h>
+#include <hurd/ihash.h>
+
+void *ports_allocate_port (struct port_bucket *bucket, 
+			   size_t size, 
+			   struct port_class *class)
+{
+  mach_port_t port;
+  error_t err;
+  struct port_info *pi;
+  
+  err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
+			    &port);
+  assert_perror (err);
+  if (size < sizeof (struct port_info))
+    size = sizeof (struct port_info);
+  
+  pi = malloc (size);
+  assert (pi);
+  pi->class = class;
+  pi->refcnt = 1;
+  pi->weakrefcnt = 0;
+  pi->mscount = 0;
+  pi->flags = 0;
+  pi->port_right = port;
+  pi->current_rpcs = 0;
+  pi->bucket = bucket;
+  
+  mutex_lock (&_ports_lock);
+  
+ loop:
+  if (class->flags & PORT_CLASS_NO_ALLOC)
+   { 
+     class->flags |= PORT_CLASS_ALLOC_WAIT;
+     condition_wait (&_ports_block, &_ports_lock);
+     goto loop;
+   }
+  if (bucket->flags & PORT_BUCKET_NO_ALLOC)
+    {
+      bucket->flags |= PORT_BUCKET_ALLOC_WAIT;
+      condition_wait (&_ports_block, &_ports_lock);
+      goto loop;
+    }
+
+  err = ihash_add (bucket->htable, port, pi, &pi->hentry);
+  assert_perror (err);
+  pi->next = class->ports;
+  pi->prevp = &class->ports;
+  class->ports->prevp = &pi->next;
+  class->ports = pi;
+  bucket->count++;
+  class->count++;
+  mutex_unlock (&_ports_lock);
+  
+  mach_port_move_member (mach_task_self (), pi->port_right, bucket->portset);
+  return pi;
+}
+
diff --git a/libports/begin-rpc.c b/libports/begin-rpc.c
new file mode 100644
index 00000000..e1541b1d
--- /dev/null
+++ b/libports/begin-rpc.c
@@ -0,0 +1,86 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+
+error_t
+ports_begin_rpc (void *portstruct, struct rpc_info *info)
+{
+  struct port_info *pi = portstruct;
+  
+  mutex_lock (&_ports_lock);
+  
+ start_over:
+
+  /* If our receive right is gone, then abandon the RPC. */
+  if (pi->port_right == MACH_PORT_NULL)
+    {
+      mutex_unlock (&_ports_lock);
+      return EDIED;
+    }
+  
+  /* Check to see if RPC's are inhibited */
+  while (_ports_flags & (_PORTS_INHIBITED | _PORTS_INHIBIT_WAIT))
+    {
+      _ports_flags |= _PORTS_BLOCKED;
+      condition_wait (&_ports_block, &_ports_lock);
+    }
+  
+  /* Check to see if RPC's are inhibited for this port's bucket */
+  if (pi->bucket->flags & (PORT_BUCKET_INHIBITED | PORT_BUCKET_INHIBIT_WAIT))
+    {
+      pi->bucket->flags |= PORT_BUCKET_BLOCKED;
+      condition_wait (&_ports_block, &_ports_lock);
+      goto start_over;
+    }
+
+  /* Check to see if RPC's are inhibited for this port's class */
+  if (pi->class->flags & (PORT_CLASS_INHIBITED | PORT_CLASS_INHIBIT_WAIT))
+    {
+      pi->class->flags |= PORT_CLASS_BLOCKED;
+      condition_wait (&_ports_block, &_ports_lock);
+      goto start_over;
+    }
+  
+  /* Check to see if RPC's are inhibited for this port itself */
+  if (pi->flags & (PORT_INHIBITED | PORT_INHIBIT_WAIT))
+    {
+      pi->flags |= PORT_BLOCKED;
+      condition_wait (&_ports_block, &_ports_lock);
+      goto start_over;
+    }
+  
+  /* Record that that an RPC is in progress */
+  info->thread = hurd_thread_self ();
+  info->next = pi->current_rpcs;
+  pi->current_rpcs->prevp = &info->next;
+  info->prevp = &pi->current_rpcs;
+  pi->current_rpcs = info;
+
+  pi->class->rpcs++;
+  pi->bucket->rpcs++;
+  _ports_total_rpcs++;
+  mutex_unlock (&_ports_lock);
+
+  return 0;
+}
+
+  
diff --git a/libports/complete-deallocate.c b/libports/complete-deallocate.c
new file mode 100644
index 00000000..c663cdfe
--- /dev/null
+++ b/libports/complete-deallocate.c
@@ -0,0 +1,48 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <assert.h>
+#include <hurd/ihash.h>
+#include <cthreads.h>
+
+void
+_ports_complete_deallocate (struct port_info *pi)
+{
+  assert ((pi->flags & PORT_HAS_SENDRIGHTS) == 0);
+
+  ihash_locp_remove (pi->bucket->htable, pi->hentry);
+  *pi->prevp = pi->next;
+  if (pi->next)
+    pi->next->prevp = pi->prevp;
+
+  pi->bucket->count--;
+  pi->class->count--;
+  mutex_unlock (&_ports_lock);
+
+  mach_port_mod_refs (mach_task_self (), pi->port_right,
+		      MACH_PORT_RIGHT_RECEIVE, -1);
+  
+  if (pi->class->clean_routine)
+    (*pi->class->clean_routine)(pi);
+  
+  free (pi);
+}
+
diff --git a/libports/count-bucket.c b/libports/count-bucket.c
new file mode 100644
index 00000000..d1d771f5
--- /dev/null
+++ b/libports/count-bucket.c
@@ -0,0 +1,34 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+
+int
+ports_count_bucket (struct port_bucket *bucket)
+{
+  int ret;
+  
+  mutex_lock (&_ports_lock);
+  ret = bucket->count;
+  bucket->flags |= PORT_BUCKET_NO_ALLOC;
+  mutex_unlock (&_ports_lock);
+  
+  return ret;
+}
diff --git a/libports/count-class.c b/libports/count-class.c
new file mode 100644
index 00000000..6aa88aa9
--- /dev/null
+++ b/libports/count-class.c
@@ -0,0 +1,37 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+
+int
+ports_count_class (struct port_class *class)
+{
+  int ret;
+  
+  mutex_lock (&_ports_lock);
+  ret = class->count;
+  class->flags |= PORT_CLASS_NO_ALLOC;
+  mutex_unlock (&_ports_lock);
+  return ret;
+}
+
+  
+
diff --git a/libports/create-bucket.c b/libports/create-bucket.c
new file mode 100644
index 00000000..1c3346e4
--- /dev/null
+++ b/libports/create-bucket.c
@@ -0,0 +1,47 @@
+/* Create a port bucket
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <assert.h>
+#include <hurd/ihash.h>
+#include <cthreads.h>
+
+struct port_bucket *
+ports_create_bucket ()
+{
+  struct port_bucket *ret;
+  error_t err;
+
+  ret = malloc (sizeof (struct port_bucket));
+  assert (ret);
+  err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_PORT_SET, 
+			    &ret->portset);
+  assert_perror (err);
+  err = ihash_create (&ret->htable);
+  assert_perror (err);
+
+  mutex_lock (&_ports_lock);
+  ret->next = _ports_all_buckets;
+  _ports_all_buckets = ret;
+  mutex_unlock (&_ports_lock);
+  return ret;
+}
+
+  
diff --git a/libports/create-class.c b/libports/create-class.c
new file mode 100644
index 00000000..fe17f0ba
--- /dev/null
+++ b/libports/create-class.c
@@ -0,0 +1,38 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <stdlib.h>
+#include <assert.h>
+
+struct port_class *
+ports_create_class (void (*clean_routine)(void *),
+		    void (*dropweak_routine)(void *))
+{
+  struct port_class *cl;
+  
+  cl = malloc (sizeof (struct port_class));
+  assert (cl);
+  cl->clean_routine = clean_routine;
+  cl->dropweak_routine = dropweak_routine;
+  cl->flags = 0;
+  cl->rpcs = 0;
+  return cl;
+}
diff --git a/libports/destroy-right.c b/libports/destroy-right.c
new file mode 100644
index 00000000..907e64d7
--- /dev/null
+++ b/libports/destroy-right.c
@@ -0,0 +1,49 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <hurd/ihash.h>
+#include <assert.h>
+
+void
+ports_destroy_right (void *portstruct)
+{
+  struct port_info *pi = portstruct;
+  error_t err;
+  
+  mutex_lock (&_ports_lock);
+  ihash_locp_remove (pi->bucket->htable, pi->hentry);
+  err = mach_port_mod_refs (mach_task_self (), pi->port_right,
+			    MACH_PORT_RIGHT_RECEIVE, -1);
+  assert_perror (err);
+  mutex_unlock (&_ports_lock);
+  
+  pi->port_right = MACH_PORT_NULL;
+
+  if (pi->flags & PORT_HAS_SENDRIGHTS)
+    {
+      pi->flags &= ~PORT_HAS_SENDRIGHTS;
+      ports_port_deref (pi);
+    }
+}
+
+
+  
diff --git a/libports/enable-bucket.c b/libports/enable-bucket.c
new file mode 100644
index 00000000..ac1af67e
--- /dev/null
+++ b/libports/enable-bucket.c
@@ -0,0 +1,34 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+
+void
+ports_enable_bucket (struct port_bucket *bucket)
+{
+  mutex_lock (&_ports_lock);
+  bucket->flags &= ~PORT_BUCKET_NO_ALLOC;
+  if (bucket->flags & PORT_BUCKET_ALLOC_WAIT)
+    {
+      bucket->flags &= PORT_BUCKET_ALLOC_WAIT;
+      condition_broadcast (&_ports_block);
+    }
+  mutex_unlock (&_ports_lock);
+}
diff --git a/libports/enable-class.c b/libports/enable-class.c
new file mode 100644
index 00000000..31d025fa
--- /dev/null
+++ b/libports/enable-class.c
@@ -0,0 +1,34 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+
+void
+ports_enable_class (struct port_class *class)
+{
+  mutex_lock (&_ports_lock);
+  class->flags &= ~PORT_CLASS_NO_ALLOC;
+  if (class->flags & PORT_CLASS_ALLOC_WAIT)
+    {
+      class->flags &= ~PORT_CLASS_ALLOC_WAIT;
+      condition_broadcast (&_ports_block);
+    }
+  mutex_unlock (&_ports_lock);
+}
diff --git a/libports/end-rpc.c b/libports/end-rpc.c
new file mode 100644
index 00000000..8eb31180
--- /dev/null
+++ b/libports/end-rpc.c
@@ -0,0 +1,44 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+
+void
+ports_end_rpc (void *port, struct rpc_info *info)
+{
+  struct port_info *pi = port;
+
+  mutex_lock (&_ports_lock);
+  *info->prevp = info->next;
+  if (info->next)
+    info->next->prevp = info->prevp;
+  pi->class->rpcs--;
+  _ports_total_rpcs--;
+  pi->bucket->rpcs--;
+
+  if ((!pi->current_rpcs && (pi->flags & PORT_INHIBIT_WAIT))
+      || (!pi->bucket->rpcs && (pi->bucket->flags & PORT_BUCKET_INHIBIT_WAIT))
+      || (!pi->class->rpcs && (pi->class->flags & PORT_CLASS_INHIBIT_WAIT))
+      || (!_ports_total_rpcs && (_ports_flags & _PORTS_INHIBIT_WAIT)))
+    condition_broadcast (&_ports_block);
+
+  mutex_unlock (&_ports_lock);
+}
diff --git a/libports/get-right.c b/libports/get-right.c
new file mode 100644
index 00000000..880c866b
--- /dev/null
+++ b/libports/get-right.c
@@ -0,0 +1,49 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <mach/notify.h>
+
+mach_port_t
+ports_get_right (void *port)
+{
+  struct port_info *pi = port;
+  mach_port_t foo;
+  
+  mutex_lock (&_ports_lock);
+  
+  pi->mscount++;
+  if (pi->flags & PORT_HAS_SENDRIGHTS == 0)
+    {
+      pi->flags |= PORT_HAS_SENDRIGHTS;
+      pi->refcnt++;
+      mach_port_request_notification (mach_task_self (), pi->port_right,
+				      MACH_NOTIFY_NO_SENDERS, 1,
+				      pi->port_right,
+				      MACH_MSG_TYPE_MAKE_SEND_ONCE, &foo);
+      if (foo != MACH_PORT_NULL)
+	mach_port_deallocate (mach_task_self (), foo);
+    }
+  mutex_unlock (&_ports_lock);
+  return pi->port_right;
+}
+
+      
diff --git a/libports/inhibit-all-rpcs.c b/libports/inhibit-all-rpcs.c
new file mode 100644
index 00000000..953bfc32
--- /dev/null
+++ b/libports/inhibit-all-rpcs.c
@@ -0,0 +1,56 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <hurd/ihash.h>
+
+void
+inhibit_all_rpcs ()
+{
+  struct port_bucket *bucket;
+  error_t interruptor (void *portstruct)
+    {
+      struct port_info *pi = portstruct;
+      struct rpc_info *rpc;
+
+      for (rpc = pi->current_rpcs; rpc; rpc = rpc->next)
+	thread_cancel (rpc->thread);
+      return 0;
+    }
+
+  mutex_lock (&_ports_lock);
+
+  for (bucket = _ports_all_buckets; bucket; bucket = bucket->next)
+    ihash_iterate (bucket->htable, interruptor);
+  
+  while (_ports_total_rpcs)
+    {
+      _ports_flags |= _PORTS_INHIBIT_WAIT;
+      condition_wait (&_ports_block, &_ports_lock);
+    }
+  
+  _ports_flags |= _PORTS_INHIBITED;
+  _ports_flags &= ~_PORTS_INHIBIT_WAIT;
+  
+  mutex_unlock (&_ports_lock);
+}
+
+    
diff --git a/libports/inhibit-bucket-rpcs.c b/libports/inhibit-bucket-rpcs.c
new file mode 100644
index 00000000..d4daa17d
--- /dev/null
+++ b/libports/inhibit-bucket-rpcs.c
@@ -0,0 +1,52 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <hurd/ihash.h>
+
+void
+ports_inhibit_bucket_rpcs (struct port_bucket *bucket)
+{
+  error_t interruptor (void *portstruct)
+    {
+      struct port_info *pi = portstruct;
+      struct rpc_info *rpc;
+      
+      for (rpc = pi->current_rpcs; rpc; rpc = rpc->next)
+	thread_cancel (rpc->thread);
+      return 0;
+    }
+  
+  mutex_lock (&_ports_lock);
+
+  ihash_iterate (bucket->htable, interruptor);
+
+  while (bucket->rpcs)
+    {
+      bucket->flags |= PORT_BUCKET_INHIBIT_WAIT;
+      condition_wait (&_ports_block, &_ports_lock);
+    }
+  
+  bucket->flags |= PORT_BUCKET_INHIBITED;
+  bucket->flags &= ~PORT_CLASS_INHIBIT_WAIT;
+  
+  mutex_unlock (&_ports_lock);
+}
diff --git a/libports/inhibit-class-rpcs.c b/libports/inhibit-class-rpcs.c
new file mode 100644
index 00000000..5bc94541
--- /dev/null
+++ b/libports/inhibit-class-rpcs.c
@@ -0,0 +1,48 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+
+void
+ports_inhibit_class_rpcs (struct port_class *class)
+{
+  struct port_info *pi;
+  struct rpc_info *rpc;
+  
+  mutex_lock (&_ports_lock);
+  
+  for (pi = class->ports; pi; pi = pi->next)
+    for (rpc = pi->current_rpcs; rpc; rpc = rpc->next)
+      thread_cancel (rpc->thread);
+
+  while (class->rpcs)
+    {
+      class->flags |= PORT_CLASS_INHIBIT_WAIT;
+      condition_wait (&_ports_block, &_ports_lock);
+    }
+  
+  class->flags |= PORT_CLASS_INHIBITED;
+  class->flags &= ~PORT_CLASS_INHIBIT_WAIT;
+
+  mutex_unlock (&_ports_lock);
+}
+
+			 
diff --git a/libports/inhibit-port-rpcs.c b/libports/inhibit-port-rpcs.c
new file mode 100644
index 00000000..60dc187f
--- /dev/null
+++ b/libports/inhibit-port-rpcs.c
@@ -0,0 +1,45 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+
+void
+inhibit_port_rpcs (void *portstruct)
+{
+  struct port_info *pi = portstruct;
+  struct rpc_info *rpc;
+  
+  mutex_lock (&_ports_lock);
+
+  for (rpc = pi->current_rpcs; rpc; rpc = rpc->next)
+    thread_cancel (rpc->thread);
+  
+  while (pi->current_rpcs)
+    {
+      pi->flags |= PORT_INHIBIT_WAIT;
+      condition_wait (&_ports_block, &_ports_lock);
+    }
+  
+  pi->flags |= PORT_INHIBITED;
+  pi->flags &= ~PORT_INHIBIT_WAIT;
+
+  mutex_unlock (&_ports_lock);
+}
diff --git a/libports/init.c b/libports/init.c
new file mode 100644
index 00000000..44c8bdd4
--- /dev/null
+++ b/libports/init.c
@@ -0,0 +1,28 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+
+struct mutex _ports_lock = MUTEX_INITIALIZER;
+struct condition _ports_block = CONDITION_INITIALIZER;
+struct port_bucket *_ports_all_buckets = 0;
+int _ports_total_rpcs = 0;
+int _ports_flags = 0;
diff --git a/libports/intern-external-port.c b/libports/intern-external-port.c
new file mode 100644
index 00000000..49139e7d
--- /dev/null
+++ b/libports/intern-external-port.c
@@ -0,0 +1,96 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <assert.h>
+#include <cthreads.h>
+#include <hurd/ihash.h>
+#include <mach/notify.h>
+
+void *ports_intern_external_port (struct port_bucket *bucket,
+				  mach_port_t port,
+				  size_t size,
+				  struct port_class *class)
+{
+  error_t err;
+  mach_port_status_t stat;
+  struct port_info *pi;
+  mach_port_t foo;
+  
+  err = mach_port_get_receive_status (mach_task_self (), port, &stat);
+  assert_perror (err);
+
+  if (size < sizeof (struct port_info))
+    size = sizeof (struct port_info);
+  
+  pi = malloc (size);
+  assert (pi);
+  
+  pi->class = class;
+  pi->refcnt = 1 + !!stat.mps_srights;
+  pi->weakrefcnt = 0;
+  pi->mscount = stat.mps_mscount;
+  pi->flags = stat.mps_srights ? PORT_HAS_SENDRIGHTS : 0;
+  pi->port_right = port;
+  pi->current_rpcs = 0;
+  pi->bucket = bucket;
+  
+  mutex_lock (&_ports_lock);
+  
+ loop:
+    if (class->flags & PORT_CLASS_NO_ALLOC)
+   { 
+     class->flags |= PORT_CLASS_ALLOC_WAIT;
+     condition_wait (&_ports_block, &_ports_lock);
+     goto loop;
+   }
+  if (bucket->flags & PORT_BUCKET_NO_ALLOC)
+    {
+      bucket->flags |= PORT_BUCKET_ALLOC_WAIT;
+      condition_wait (&_ports_block, &_ports_lock);
+      goto loop;
+    }
+
+  err = ihash_add (bucket->htable, port, pi, &pi->hentry);
+  assert_perror (err);
+  pi->next = class->ports;
+  pi->prevp = &class->ports;
+  class->ports->prevp = &pi->next;
+  class->ports = pi;
+  bucket->count++;
+  class->count++;
+  mutex_unlock (&_ports_lock);
+  
+  mach_port_move_member (mach_task_self (), port, bucket->portset);
+
+  if (stat.mps_srights)
+    {
+      err = mach_port_request_notification (mach_task_self (), port,
+					    MACH_NOTIFY_NO_SENDERS, 
+					    stat.mps_mscount, 
+					    port, MACH_MSG_TYPE_MAKE_SEND_ONCE,
+					    &foo);
+      assert_perror (err);
+      if (foo != MACH_PORT_NULL)
+	mach_port_deallocate (mach_task_self (), foo);
+    }
+
+  return pi;
+}
diff --git a/libports/interrupt-rpcs.c b/libports/interrupt-rpcs.c
new file mode 100644
index 00000000..930ed201
--- /dev/null
+++ b/libports/interrupt-rpcs.c
@@ -0,0 +1,38 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+
+void
+ports_interrupt_rpc (void *portstruct)
+{
+  struct port_info *pi = portstruct;
+  struct rpc_info *rpc;
+
+  mutex_lock (&_ports_lock);
+  
+  for (rpc = pi->current_rpcs; rpc; rpc = rpc->next)
+    thread_cancel (rpc->thread);
+
+  mutex_unlock (&_ports_lock);
+}
+
+      
diff --git a/libports/lookup-port.c b/libports/lookup-port.c
new file mode 100644
index 00000000..3db912c6
--- /dev/null
+++ b/libports/lookup-port.c
@@ -0,0 +1,52 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <hurd/ihash.h>
+
+void *
+ports_lookup_port (struct port_bucket *bucket,
+		   mach_port_t port,
+		   struct port_class *class)
+{
+  struct port_info *pi = 0;
+  
+  mutex_lock (&_ports_lock);
+
+  if (bucket)
+    pi = ihash_find (bucket->htable, port);
+  else
+    for (bucket = _ports_all_buckets; bucket; bucket = bucket->next)
+      if (pi = ihash_find (bucket->htable, port))
+	break;
+  
+  if (pi && class && pi->class != class)
+    pi = 0;
+
+  if (pi)
+    pi->refcnt++;
+
+  mutex_lock (&_ports_lock);
+  
+  return pi;
+}
+
+  
diff --git a/libports/manage-multithread.c b/libports/manage-multithread.c
new file mode 100644
index 00000000..767d9ee7
--- /dev/null
+++ b/libports/manage-multithread.c
@@ -0,0 +1,123 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <spin-lock.h>
+#include <assert.h>
+#include <cthreads.h>
+
+void
+ports_manage_port_operations_multithread (struct port_bucket *bucket,
+					  ports_demuxer_type demuxer,
+					  int thread_timeout,
+					  int global_timeout,
+					  int wire_cthreads,
+					  mach_port_t wire_threads)
+{
+  error_t err;
+  int nreqthreads = 0;
+  int totalthreads = 0;
+  spin_lock_t lock = SPIN_LOCK_INITIALIZER;
+
+  auto void thread_function (int);
+
+  int 
+  internal_demuxer (mach_msg_header_t *inp,
+		    mach_msg_header_t *outp)
+    {
+      int spawn = 0;
+      int status;
+      struct port_info *pi;
+      struct rpc_info link;
+
+      spin_lock (&lock);
+      assert (nreqthreads);
+      nreqthreads--;
+      if (nreqthreads == 0)
+	spawn = 1;
+      spin_unlock (&lock);
+	  
+      if (spawn)
+	cthread_detach (cthread_fork ((cthread_fn_t) thread_function, 0));
+
+      pi = ports_lookup_port (bucket, inp->msgh_local_port, 0);
+      ports_begin_rpc (pi, &link);
+      status = demuxer (inp, outp);
+      ports_end_rpc (pi, &link);
+      ports_port_deref (pi);
+
+      spin_lock (&lock);
+      nreqthreads++;
+      spin_unlock (&lock);
+	  
+      return status;
+    }
+
+  void 
+  thread_function (int master)
+    {
+      int timeout;
+      
+      if (wire_threads)
+	thread_wire (wire_threads, hurd_thread_self (), 1);
+      if (wire_cthreads)
+	cthread_wire ();
+
+      spin_lock (&lock);
+      totalthreads++;
+      nreqthreads++;
+      if (master)
+	timeout = global_timeout;
+      else
+	timeout = thread_timeout;
+      spin_unlock (&lock);
+
+    startover:
+
+      do
+	err = mach_msg_server_timeout (internal_demuxer, 0, bucket->portset,
+				       timeout ? MACH_RCV_TIMEOUT : 0,
+				       timeout);
+      while (err != MACH_RCV_TIMED_OUT);
+      
+      if (master)
+	{
+	  spin_lock (&lock);
+	  if (totalthreads != 1)
+	    goto startover;
+	  return;
+	}
+      else
+	{
+	  spin_lock (&lock);
+	  nreqthreads--;
+	  totalthreads--;
+	  spin_unlock (&lock);
+	  cthread_exit (0);
+	}
+    }
+  
+  thread_function (1);
+}
+
+
+	
+      
+	
diff --git a/libports/manage-one-thread.c b/libports/manage-one-thread.c
new file mode 100644
index 00000000..41cf4b70
--- /dev/null
+++ b/libports/manage-one-thread.c
@@ -0,0 +1,63 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+
+void
+ports_manage_port_operations_one_thread (struct port_bucket *bucket,
+					 ports_demuxer_type demuxer,
+					 int timeout)
+{
+  error_t err;
+
+  int 
+  internal_demuxer (mach_msg_header_t *inp,
+		    mach_msg_header_t *outp)
+    {
+      struct port_info *pi;
+      struct rpc_info link;
+      int status;
+      error_t err;
+
+      pi = ports_lookup_port (bucket, inp->msgh_local_port, 0);
+      err = ports_begin_rpc (pi, &link);
+      if (err)
+	{
+	  mach_port_deallocate (mach_task_self (), inp->msgh_remote_port);
+	  status = 0;
+	}
+      else
+	{
+	  status = demuxer (inp, outp);
+	  ports_end_rpc (pi, &link);
+	}
+      
+      ports_port_deref (pi);
+
+      return status;
+    }
+  
+  do
+    err = mach_msg_server_timeout (internal_demuxer, 0, bucket->portset, 
+				   timeout ? MACH_RCV_TIMEOUT : 0, timeout);
+  while (err != MACH_RCV_TIMED_OUT);
+}
+
+      
diff --git a/libports/no-senders.c b/libports/no-senders.c
new file mode 100644
index 00000000..09a32dfc
--- /dev/null
+++ b/libports/no-senders.c
@@ -0,0 +1,61 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <mach/notify.h>
+
+void
+ports_no_senders (void *portstruct,
+		  mach_port_mscount_t mscount)
+{
+  struct port_info *pi = portstruct;
+  int dealloc;
+  mach_port_t old;
+  
+  mutex_lock (&_ports_lock);
+  if ((pi->flags & PORT_HAS_SENDRIGHTS) == 0)
+    {
+      mutex_unlock (&_ports_lock);
+      return;
+    }
+  if (mscount >= pi->mscount)
+    {
+      dealloc = 1;
+      pi->flags &= ~PORT_HAS_SENDRIGHTS;
+    }
+  else
+    {
+      /* Request a new notification.  The sync value is because
+       we might have accounted for a new sender but not actually
+       made the send right yet.  */
+      mach_port_request_notification (mach_task_self (), pi->port_right,
+				      MACH_NOTIFY_NO_SENDERS, pi->mscount,
+				      pi->port_right,
+				      MACH_MSG_TYPE_MAKE_SEND_ONCE, &old);
+      if (old)
+	mach_port_deallocate (mach_task_self (), old);
+      dealloc = 0;
+    }
+  mutex_unlock (&_ports_lock);
+  
+  if (dealloc)
+    ports_port_deref (pi);
+}
diff --git a/libports/port-deref-weak.c b/libports/port-deref-weak.c
new file mode 100644
index 00000000..2bef3338
--- /dev/null
+++ b/libports/port-deref-weak.c
@@ -0,0 +1,38 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <assert.h>
+
+void
+ports_port_deref_weak (void *portstruct)
+{
+  struct port_info *pi = portstruct;
+  
+  mutex_lock (&_ports_lock);
+  assert (pi->weakrefcnt);
+  pi->weakrefcnt--;
+  if (pi->refcnt == 0 && pi->weakrefcnt == 0)
+    _ports_complete_deallocate (pi);
+  else
+    mutex_unlock (&_ports_lock);
+}
+
diff --git a/libports/port-deref.c b/libports/port-deref.c
new file mode 100644
index 00000000..a1238315
--- /dev/null
+++ b/libports/port-deref.c
@@ -0,0 +1,53 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <assert.h>
+
+void
+ports_port_deref (void *portstruct)
+{
+  struct port_info *pi = portstruct;
+  int trieddroppingweakrefs = 0;
+
+ retry:
+  
+  mutex_lock (&_ports_lock);
+  
+  if (pi->refcnt == 1 && pi->weakrefcnt && !trieddroppingweakrefs)
+    {
+      mutex_unlock (&_ports_lock);
+      if (pi->class->dropweak_routine)
+	(*pi->class->dropweak_routine) (pi);
+      trieddroppingweakrefs = 1;
+      goto retry;
+    }
+  
+  assert (pi->refcnt);
+
+  pi->refcnt--;
+  if (pi->refcnt == 0 && pi->weakrefcnt == 0)
+    _ports_complete_deallocate (pi);
+  else
+    mutex_unlock (&_ports_lock);
+}
+
+      
diff --git a/libports/port-ref-weak.c b/libports/port-ref-weak.c
new file mode 100644
index 00000000..6ebd5608
--- /dev/null
+++ b/libports/port-ref-weak.c
@@ -0,0 +1,34 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <assert.h>
+
+void
+ports_port_ref_weak (void *portstruct)
+{
+  struct port_info *pi = portstruct;
+  
+  mutex_lock (&_ports_lock);
+  assert (pi->refcnt || pi->weakrefcnt);
+  pi->weakrefcnt++;
+  mutex_unlock (&_ports_lock);
+}
diff --git a/libports/port-ref.c b/libports/port-ref.c
new file mode 100644
index 00000000..7fd15272
--- /dev/null
+++ b/libports/port-ref.c
@@ -0,0 +1,36 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <assert.h>
+
+void
+ports_port_ref (void *portstruct)
+{
+  struct port_info *pi = portstruct;
+  
+  mutex_lock (&_ports_lock);
+  assert (pi->refcnt || pi->weakrefcnt);
+  pi->refcnt++;
+  mutex_unlock (&_ports_lock);
+}
+
+  
diff --git a/libports/reallocate-from-external.c b/libports/reallocate-from-external.c
new file mode 100644
index 00000000..74e6d76c
--- /dev/null
+++ b/libports/reallocate-from-external.c
@@ -0,0 +1,80 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <assert.h>
+#include <cthreads.h>
+#include <hurd/ihash.h>
+#include <mach/notify.h>
+
+void
+ports_reallocate_from_external (void *portstruct, mach_port_t receive)
+{
+  struct port_info *pi = portstruct;
+  mach_port_status_t stat;
+  int dropref = 0;
+  mach_port_t foo;
+  error_t err;
+
+  err = mach_port_get_receive_status (mach_task_self (), receive, &stat);
+  assert_perror (err);
+  
+  mutex_lock (&_ports_lock);
+  
+  err = mach_port_mod_refs (mach_task_self (), pi->port_right,
+			    MACH_PORT_RIGHT_RECEIVE, -1);
+  assert_perror (err);
+
+  ihash_locp_remove (pi->bucket->htable, pi->hentry);
+  
+  if ((pi->flags & PORT_HAS_SENDRIGHTS) && !stat.mps_srights)
+    {
+      dropref = 1;
+      pi->flags &= ~PORT_HAS_SENDRIGHTS;
+    }
+  else if ((pi->flags & PORT_HAS_SENDRIGHTS == 0) && stat.mps_srights)
+    {
+      pi->flags |= PORT_HAS_SENDRIGHTS;
+      pi->refcnt++;
+    }
+  
+  pi->port_right = receive;
+  pi->mscount = stat.mps_mscount;
+  
+  ihash_add (pi->bucket->htable, receive, pi, &pi->hentry);
+  mutex_unlock (&_ports_lock);
+  
+  mach_port_move_member (mach_task_self (), receive, pi->bucket->portset);
+  
+  if (stat.mps_srights)
+    {
+      err = mach_port_request_notification (mach_task_self (), receive,
+					    MACH_NOTIFY_NO_SENDERS,
+					    stat.mps_mscount, receive,
+					    MACH_MSG_TYPE_MAKE_SEND_ONCE,
+					    &foo);
+      assert_perror (err);
+      if (foo != MACH_PORT_NULL)
+	mach_port_deallocate (mach_task_self (), foo);
+    }
+
+  if (dropref)
+    ports_port_deref (pi);
+}
diff --git a/libports/reallocate-port.c b/libports/reallocate-port.c
new file mode 100644
index 00000000..b2785292
--- /dev/null
+++ b/libports/reallocate-port.c
@@ -0,0 +1,62 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <hurd/ihash.h>
+#include <assert.h>
+#include <cthreads.h>
+
+void
+ports_reallocate_port (void *portstruct)
+{
+  struct port_info *pi = portstruct;
+  error_t err;
+  int dropref = 0;
+
+  mutex_lock (&_ports_lock);
+  err = mach_port_mod_refs (mach_task_self (), pi->port_right, 
+			    MACH_PORT_RIGHT_RECEIVE, -1);
+  assert_perror (err);
+
+  ihash_locp_remove (pi->bucket->htable, pi->hentry);
+
+  err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
+			    &pi->port_right);
+  assert_perror (err);
+  if (pi->flags & PORT_HAS_SENDRIGHTS)
+    {
+      pi->flags &= ~PORT_HAS_SENDRIGHTS;
+      dropref = 1;
+    }
+  pi->mscount = 0;
+  ihash_add (pi->bucket->htable, pi->port_right, pi, &pi->hentry);
+  mutex_unlock (&_ports_lock);
+
+  mach_port_move_member (mach_task_self (), pi->port_right, 
+			 pi->bucket->portset);
+
+  if (dropref)
+    ports_port_deref (pi);
+}
+
+  
+
+		      
+    
diff --git a/libports/resume-all-rpcs.c b/libports/resume-all-rpcs.c
new file mode 100644
index 00000000..fa978c1e
--- /dev/null
+++ b/libports/resume-all-rpcs.c
@@ -0,0 +1,39 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <assert.h>
+
+void
+ports_resume_all_rpcs ()
+{
+  mutex_lock (&_ports_lock);
+  assert (_ports_flags & _PORTS_INHIBITED);
+  _ports_flags &= ~_PORTS_INHIBITED;
+  if (_ports_flags | _PORTS_BLOCKED)
+    {
+      _ports_flags &= ~_PORTS_BLOCKED;
+      condition_broadcast (&_ports_block);
+    }
+  mutex_unlock (&_ports_lock);
+}
+
+      
diff --git a/libports/resume-bucket-rpcs.c b/libports/resume-bucket-rpcs.c
new file mode 100644
index 00000000..9d968874
--- /dev/null
+++ b/libports/resume-bucket-rpcs.c
@@ -0,0 +1,37 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <assert.h>
+
+void
+ports_resume_bucket_rpcs (struct port_bucket *bucket)
+{
+  mutex_lock (&_ports_lock);
+  assert (bucket->flags & PORT_BUCKET_INHIBITED);
+  bucket->flags &= ~PORT_BUCKET_INHIBITED;
+  if (bucket->flags | PORT_BUCKET_BLOCKED)
+    {
+      bucket->flags &= ~PORT_BUCKET_BLOCKED;
+      condition_broadcast (&_ports_block);
+    }
+  mutex_unlock (&_ports_lock);
+}
diff --git a/libports/resume-class-rpcs.c b/libports/resume-class-rpcs.c
new file mode 100644
index 00000000..f0516bd5
--- /dev/null
+++ b/libports/resume-class-rpcs.c
@@ -0,0 +1,38 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <assert.h>
+
+void
+ports_resume_class_rpcs (struct port_class *class)
+{
+  mutex_lock (&_ports_lock);
+  assert (class->flags & PORT_CLASS_INHIBITED);
+  class->flags &= ~PORT_CLASS_INHIBITED;
+  if (class->flags | PORT_CLASS_BLOCKED)
+    {
+      class->flags &= ~PORT_BLOCKED;
+      condition_broadcast (&_ports_block);
+    }
+  mutex_unlock (&_ports_lock);
+}
+
diff --git a/libports/resume-port-rpcs.c b/libports/resume-port-rpcs.c
new file mode 100644
index 00000000..563c9adc
--- /dev/null
+++ b/libports/resume-port-rpcs.c
@@ -0,0 +1,43 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "ports.h"
+#include <cthreads.h>
+#include <assert.h>
+
+void
+ports_resume_port_rpcs (void *portstruct)
+{
+  struct port_info *pi = portstruct;
+  
+  mutex_lock (&_ports_lock);
+  
+  assert (pi->flags & PORT_INHIBITED);
+  pi->flags &= ~PORT_INHIBITED;
+  if (pi->flags | PORT_BLOCKED)
+    {
+      pi->flags &= ~PORT_BLOCKED;
+      condition_broadcast (&_ports_block);
+    }
+  mutex_unlock (&_ports_lock);
+}
+
+
+