From 5b845f34e5dca3e87b92045c870244aaad4b875d Mon Sep 17 00:00:00 2001
From: Miles Bader <miles@gnu.org>
Date: Tue, 5 Mar 1996 00:34:01 +0000
Subject: Initial revision

---
 libports/create-port.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 libports/create-port.c

(limited to 'libports/create-port.c')

diff --git a/libports/create-port.c b/libports/create-port.c
new file mode 100644
index 00000000..09ebae44
--- /dev/null
+++ b/libports/create-port.c
@@ -0,0 +1,107 @@
+/* Create a new port structure
+
+   Copyright (C) 1995, 1996 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>
+
+/* Create and return in RESULT a new port in CLASS and BUCKET; SIZE bytes
+   will be allocated to hold the port structure and whatever private data the
+   user desires.  */
+error_t
+ports_create_port (struct port_class *class, struct port_bucket *bucket,
+		   size_t size, void *result)
+{
+  mach_port_t port;
+  error_t err;
+  struct port_info *pi;
+
+  err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
+			    &port);
+  if (err)
+    return err;
+
+  if (size < sizeof (struct port_info))
+    size = sizeof (struct port_info);
+
+  pi = malloc (size);
+  if (! pi)
+    {
+      mach_port_deallocate (mach_task_self (), port);
+      return ENOMEM;
+    }
+
+  pi->class = class;
+  pi->refcnt = 1;
+  pi->weakrefcnt = 0;
+  pi->cancel_threshold = 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;
+      if (hurd_condition_wait (&_ports_block, &_ports_lock))
+	goto cancelled;
+      goto loop;
+    }
+  if (bucket->flags & PORT_BUCKET_NO_ALLOC)
+    {
+      bucket->flags |= PORT_BUCKET_ALLOC_WAIT;
+      if (hurd_condition_wait (&_ports_block, &_ports_lock))
+	goto cancelled;
+      goto loop;
+    }
+
+  err = ihash_add (bucket->htable, port, pi, &pi->hentry);
+  if (err)
+    goto lose;
+
+  pi->next = class->ports;
+  pi->prevp = &class->ports;
+  if (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);
+
+  *(void **)result = pi;
+  return 0;
+
+ cancelled:
+  err = EINTR;
+ lose:
+  mutex_unlock (&_ports_lock);
+  mach_port_mod_refs (mach_task_self (), port, MACH_PORT_RIGHT_RECEIVE, -1);
+  free (pi);
+
+  return err;
+}
-- 
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