From fcaaa9cb56f94e99d50d9680d6caf67d75b518c8 Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Mon, 28 Sep 2015 15:22:29 +0200
Subject: devnode: convert to trivfs dynamic classes and buckets

libtrivfs contains two ways of managing more than one port class and
bucket.  There is the old way of using a statically allocated array
with explicit length, and the new way with dynamically allocated
vectors.

Converting all users to the new way of handling multiple classes
and/or buckets, we can simplify the code in libtrivfs.  In many cases,
the code will be simpler and more expressive for the user.

This also fixes a mild bug.  The classes and buckets given to
`trivfs_startup' end up in the dynamic vectors too, making the object
lookup code use the more complicated code path.

* devnode/devnode.c: Convert to dynamic classes and buckets.
---
 devnode/devnode.c | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

(limited to 'devnode')

diff --git a/devnode/devnode.c b/devnode/devnode.c
index 789bf513..317a70b1 100644
--- a/devnode/devnode.c
+++ b/devnode/devnode.c
@@ -73,10 +73,9 @@ int trivfs_support_write = 0;
 int trivfs_support_exec = 0;
 int trivfs_allow_open = O_READ | O_WRITE;
 
-struct port_class *trivfs_protid_portclasses[1];
-struct port_class *trivfs_cntl_portclasses[1];
-int trivfs_protid_nportclasses = 1;
-int trivfs_cntl_nportclasses = 1;
+/* Our port classes.  */
+struct port_class *trivfs_protid_class;
+struct port_class *trivfs_cntl_class;
 
 static int
 devnode_demuxer (mach_msg_header_t *inp,
@@ -291,18 +290,18 @@ trivfs_goaway (struct trivfs_control *fsys, int flags)
   int count;
 
   /* Stop new requests.  */
-  ports_inhibit_class_rpcs (trivfs_cntl_portclasses[0]);
-  ports_inhibit_class_rpcs (trivfs_protid_portclasses[0]);
+  ports_inhibit_class_rpcs (trivfs_cntl_class);
+  ports_inhibit_class_rpcs (trivfs_protid_class);
 
-  count = ports_count_class (trivfs_protid_portclasses[0]);
+  count = ports_count_class (trivfs_protid_class);
   debug ("the number of ports alive: %d\n", count);
 
   if (count && !(flags & FSYS_GOAWAY_FORCE)) 
     {
       /* We won't go away, so start things going again...  */
-      ports_enable_class (trivfs_protid_portclasses[0]);
-      ports_resume_class_rpcs (trivfs_cntl_portclasses[0]);
-      ports_resume_class_rpcs (trivfs_protid_portclasses[0]); 
+      ports_enable_class (trivfs_protid_class);
+      ports_resume_class_rpcs (trivfs_cntl_class);
+      ports_resume_class_rpcs (trivfs_protid_class); 
       return EBUSY;
     } 
 
@@ -347,8 +346,8 @@ main (int argc, char *argv[])
   const struct argp argp = { options, parse_opt, args_doc, doc };
 
   port_bucket = ports_create_bucket ();
-  trivfs_cntl_portclasses[0] = ports_create_class (trivfs_clean_cntl, 0);
-  trivfs_protid_portclasses[0] = ports_create_class (trivfs_clean_protid, 0);
+  trivfs_cntl_class = ports_create_class (trivfs_clean_cntl, 0);
+  trivfs_protid_class = ports_create_class (trivfs_clean_protid, 0);
 
   argp_parse (&argp, argc, argv, 0, 0, 0);
 
@@ -365,8 +364,8 @@ main (int argc, char *argv[])
 
   /* Reply to our parent.  */
   err = trivfs_startup (bootstrap, 0,
-			trivfs_cntl_portclasses[0], port_bucket,
-			trivfs_protid_portclasses[0], port_bucket, &fsys);
+			trivfs_cntl_class, port_bucket,
+			trivfs_protid_class, port_bucket, &fsys);
   mach_port_deallocate (mach_task_self (), bootstrap);
   if (err)
     error (1, err, "Contacting parent");
-- 
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