X-Git-Url: https://git.distorted.org.uk/~mdw/fwd/blobdiff_plain/667fb920a9ace885b3ac2dc8277d104930bd2727..07d71f34ab3887b63c6ff2d635fce07368f90295:/reffd.c

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+/* -*-c-*-
+ *
+ * $Id: reffd.c,v 1.1 1999/07/26 23:33:01 mdw Exp $
+ *
+ * Reference counted file descriptors
+ *
+ * (c) 1999 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------* 
+ *
+ * This file is part of the `fw' port forwarder.
+ *
+ * `fw' 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 of the License, or
+ * (at your option) any later version.
+ * 
+ * `fw' 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 `fw'; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------* 
+ *
+ * $Log: reffd.c,v $
+ * Revision 1.1  1999/07/26 23:33:01  mdw
+ * Infrastructure for the new design.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <mLib/sub.h>
+
+#include "reffd.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @reffd_init@ --- *
+ *
+ * Arguments:	@int fd@ = file descriptor
+ *
+ * Returns:	Reference-counted file descriptor object.
+ *
+ * Use:		Creates a refcounted file descriptor.
+ */
+
+reffd *reffd_init(int fd)
+{
+  reffd *r = CREATE(reffd);
+  r->fd = fd;
+  r->ref = 1;
+  r->proc = 0;
+  r->p = 0;
+  return (r);
+}
+
+/* --- @reffd_handler@ --- *
+ *
+ * Arguments:	@reffd *r@ = pointer to reference counted filehandle
+ *		@void (*proc)(void *p)@ = procedure to call
+ *		@void *p@
+ *
+ * Returns:	---
+ *
+ * Use:		Sets the reference counted file descriptor to call @proc@
+ *		when it is no longer required.
+ */
+
+void reffd_handler(reffd *r, void (*proc)(void *p), void *p)
+{
+  r->proc = proc;
+  r->p = p;
+}
+
+/* --- @reffd_inc@ --- *
+ *
+ * Arguments:	@reffd *r@ = pointer to reference counted filehandle
+ *
+ * Returns:	---
+ *
+ * Use:		Increments the reference count for a file descriptor.
+ */
+
+void reffd_inc(reffd *r) { REFFD_INC(r); }
+
+/* --- @reffd_dec@ --- *
+ *
+ * Arguments:	@reffd *r@ = pointer to reference counted filehandle
+ *
+ * Returns:	---
+ *
+ * Use:		Decrements the reference count for a file descriptor.
+ */
+
+void reffd_dec(reffd *r) { REFFD_DEC(r); }
+
+/*----- That's all, folks -------------------------------------------------*/