1 files changed, 105 insertions, 0 deletions
diff --git a/ftpfs/conn.c b/ftpfs/conn.c
new file mode 100644
index 00000000..930e2eb7
--- /dev/null
+++ b/ftpfs/conn.c
@@ -0,0 +1,105 @@
+/* Ftp connection management
+
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#include <assert.h>
+
+#include "ftpfs.h"
+
+/* A particular connection.  */
+struct ftpfs_conn 
+{
+  struct ftp_conn *conn;
+  struct ftpfs_conn *next;
+};
+
+/* For debugging purposes, give each connection a unique integer id.  */
+static unsigned conn_id = 0;
+
+/* Get an ftp connection to use for an operation. */
+error_t
+ftpfs_get_ftp_conn (struct ftpfs *fs, struct ftp_conn **conn)
+{
+  struct ftpfs_conn *fsc;
+
+  spin_lock (&fs->conn_lock);
+  fsc = fs->free_conns;
+  if (fsc)
+    fs->free_conns = fsc->next;
+  spin_unlock (&fs->conn_lock);
+
+  if (! fsc)
+    {
+      error_t err;
+
+      fsc = malloc (sizeof (struct ftpfs_conn));
+      if (! fsc)
+	return ENOMEM;
+
+      err = ftp_conn_create (fs->ftp_params, fs->ftp_hooks, &fsc->conn);
+
+      if (! err)
+	{
+	  /* Set connection type to binary.  */
+	  err = ftp_conn_set_type (fsc->conn, "I");
+	  if (err)
+	    ftp_conn_free (fsc->conn);
+	}
+
+      if (err)
+	{
+	  free (fsc);
+	  return err;
+	}
+
+      /* For debugging purposes, give each connection a unique integer id.  */
+      fsc->conn->hook = (void *)conn_id++;
+    }
+
+  spin_lock (&fs->conn_lock);
+  fsc->next = fs->conns;
+  fs->conns = fsc;
+  spin_unlock (&fs->conn_lock);
+
+  *conn = fsc->conn;
+
+  return 0;
+}
+
+/* Return CONN to the pool of free connections in FS.  */
+void
+ftpfs_release_ftp_conn (struct ftpfs *fs, struct ftp_conn *conn)
+{
+  struct ftpfs_conn *fsc, *pfsc;
+
+  spin_lock (&fs->conn_lock);
+  for (pfsc = 0, fsc = fs->conns; fsc; pfsc = fsc, fsc = fsc->next)
+    if (fsc->conn == conn)
+      {
+	if (pfsc)
+	  pfsc->next = fsc->next;
+	else
+	  fs->conns = fsc->next;
+	fsc->next = fs->free_conns;
+	fs->free_conns = fsc;
+	break;
+      }
+  assert (fsc);
+  spin_unlock (&fs->conn_lock);
+}