Initial revision
diff --git a/isisd/modified/thread.h b/isisd/modified/thread.h
new file mode 100644
index 0000000..c3fac43
--- /dev/null
+++ b/isisd/modified/thread.h
@@ -0,0 +1,141 @@
+/* Thread management routine header.
+ * Copyright (C) 1998 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra 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.
+ *
+ * GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_THREAD_H
+#define _ZEBRA_THREAD_H
+
+#ifdef HAVE_RUSAGE
+#define RUSAGE_T struct rusage
+#define GETRUSAGE(X) getrusage (RUSAGE_SELF, X);
+#else
+#define RUSAGE_T struct timeval
+#define GETRUSAGE(X) gettimeofday (X, NULL);
+#endif /* HAVE_RUSAGE */
+
+/* Linked list of thread. */
+struct thread_list
+{
+ struct thread *head;
+ struct thread *tail;
+ int count;
+};
+
+/* Master of the theads. */
+struct thread_master
+{
+ struct thread_list read;
+ struct thread_list write;
+ struct thread_list timer;
+ struct thread_list event;
+ struct thread_list ready;
+ struct thread_list unuse;
+ fd_set readfd;
+ fd_set writefd;
+ fd_set exceptfd;
+ unsigned long alloc;
+};
+
+/* Thread itself. */
+struct thread
+{
+ unsigned char type; /* thread type */
+ struct thread *next; /* next pointer of the thread */
+ struct thread *prev; /* previous pointer of the thread */
+ struct thread_master *master; /* pointer to the struct thread_master. */
+ int (*func) (struct thread *); /* event function */
+ void *arg; /* event argument */
+ union {
+ int val; /* second argument of the event. */
+ int fd; /* file descriptor in case of read/write. */
+ struct timeval sands; /* rest of time sands value. */
+ } u;
+ RUSAGE_T ru; /* Indepth usage info. */
+};
+
+/* Thread types. */
+#define THREAD_READ 0
+#define THREAD_WRITE 1
+#define THREAD_TIMER 2
+#define THREAD_EVENT 3
+#define THREAD_READY 4
+#define THREAD_UNUSED 5
+
+/* Thread yield time. */
+#define THREAD_YIELD_TIME_SLOT 100 * 1000L /* 100ms */
+
+/* Macros. */
+#define THREAD_ARG(X) ((X)->arg)
+#define THREAD_FD(X) ((X)->u.fd)
+#define THREAD_VAL(X) ((X)->u.val)
+
+#define THREAD_READ_ON(master,thread,func,arg,sock) \
+ do { \
+ if (! thread) \
+ thread = thread_add_read (master, func, arg, sock); \
+ } while (0)
+
+#define THREAD_WRITE_ON(master,thread,func,arg,sock) \
+ do { \
+ if (! thread) \
+ thread = thread_add_write (master, func, arg, sock); \
+ } while (0)
+
+#define THREAD_TIMER_ON(master,thread,func,arg,time) \
+ do { \
+ if (! thread) \
+ thread = thread_add_timer (master, func, arg, time); \
+ } while (0)
+
+#define THREAD_OFF(thread) \
+ do { \
+ if (thread) \
+ { \
+ thread_cancel (thread); \
+ thread = NULL; \
+ } \
+ } while (0)
+
+#define THREAD_READ_OFF(thread) THREAD_OFF(thread)
+#define THREAD_WRITE_OFF(thread) THREAD_OFF(thread)
+#define THREAD_TIMER_OFF(thread) THREAD_OFF(thread)
+
+/* Prototypes. */
+struct thread_master *thread_master_create ();
+struct thread *thread_add_read (struct thread_master *,
+ int (*)(struct thread *), void *, int);
+struct thread *thread_add_write (struct thread_master *,
+ int (*)(struct thread *), void *, int);
+struct thread *thread_add_timer (struct thread_master *,
+ int (*)(struct thread *), void *, long);
+struct thread *thread_add_timer_msec (struct thread_master *,
+ int (*)(struct thread *), void *, long);
+struct thread *thread_add_event (struct thread_master *,
+ int (*)(struct thread *), void *, int );
+void thread_cancel (struct thread *);
+void thread_cancel_event (struct thread_master *, void *);
+
+struct thread *thread_fetch (struct thread_master *, struct thread *);
+struct thread *thread_execute (struct thread_master *,
+ int (*)(struct thread *), void *, int);
+void thread_call (struct thread *);
+unsigned long thread_timer_remain_second (struct thread *);
+
+#endif /* _ZEBRA_THREAD_H */