1 files changed, 109 insertions, 0 deletions
diff --git a/firmware/libosmocore/include/osmocom/core/timer.h b/firmware/libosmocore/include/osmocom/core/timer.h
new file mode 100644
index 0000000..c6d46e1
--- /dev/null
+++ b/firmware/libosmocore/include/osmocom/core/timer.h
@@ -0,0 +1,109 @@
+/*
+ * (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * All Rights Reserved
+ *
+ * This program 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.
+ *
+ * This program 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+/*! \defgroup timer Osmocom timers
+ *  @{
+ */
+
+/*! \file timer.h
+ *  \brief Osmocom timer handling routines
+ */
+
+#pragma once
+
+/* override 'struct timeval' for jififes based timers */
+struct osmo_timeval {
+	unsigned long expires;
+};
+#define timerisset(tvp)		((tvp)->expires)
+#define timerclear(tvp)		(tvp)->expires = 0
+#define timercmp(a, b, CMP)	(a)->expires CMP (b)->expires
+#define timersub(a, b, result)	(result)->expires = (a)->expires - (b)->expires
+#define timeradd(a, b, result)	(result)->expires = (a)->expires + (b)->expires
+struct timezone;
+
+#include <stdbool.h>
+
+#include "osmocom/core/linuxlist.h"
+#include "osmocom/core/linuxrbtree.h"
+
+/**
+ * Timer management:
+ *      - Create a struct osmo_timer_list
+ *      - Fill out timeout and use add_timer or
+ *        use osmo_timer_schedule to schedule a timer in
+ *        x seconds and microseconds from now...
+ *      - Use osmo_timer_del to remove the timer
+ *
+ *  Internally:
+ *      - We hook into select.c to give a timeval of the
+ *        nearest timer. On already passed timers we give
+ *        it a 0 to immediately fire after the select
+ *      - osmo_timers_update will call the callbacks and
+ *        remove the timers.
+ *
+ */
+/*! \brief A structure representing a single instance of a timer */
+struct osmo_timer_list {
+	struct rb_node node;	  /*!< \brief rb-tree node header */
+	struct llist_head list;   /*!< \brief internal list header */
+	struct osmo_timeval timeout;   /*!< \brief expiration time */
+	unsigned int active  : 1; /*!< \brief is it active? */
+
+	void (*cb)(void*);	  /*!< \brief call-back called at timeout */
+	void *data;		  /*!< \brief user data for callback */
+};
+
+/**
+ * timer management
+ */
+
+void osmo_timer_add(struct osmo_timer_list *timer);
+
+void osmo_timer_schedule(struct osmo_timer_list *timer, int seconds, int microseconds);
+
+void osmo_timer_del(struct osmo_timer_list *timer);
+
+int osmo_timer_pending(struct osmo_timer_list *timer);
+
+int osmo_timer_remaining(const struct osmo_timer_list *timer,
+			 const struct osmo_timeval *now,
+			 struct osmo_timeval *remaining);
+/*
+ * internal timer list management
+ */
+struct osmo_timeval *osmo_timers_nearest(void);
+void osmo_timers_prepare(void);
+int osmo_timers_update(void);
+int osmo_timers_check(void);
+
+int osmo_gettimeofday(struct osmo_timeval *tv, struct timezone *tz);
+
+#if 0
+/**
+ * timer override
+ */
+
+extern bool osmo_gettimeofday_override;
+extern struct timeval osmo_gettimeofday_override_time;
+void osmo_gettimeofday_override_add(time_t secs, suseconds_t usecs);
+#endif
+
+/*! @} */