From 30f0bb1d66f016d6d8366aa483ca12a4724bd599 Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Tue, 18 Sep 2007 12:40:26 +0000
Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 src/include/delta.h | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/include/delta.h

(limited to 'src/include/delta.h')

diff --git a/src/include/delta.h b/src/include/delta.h
new file mode 100644
index 000000000..2ae4d887f
--- /dev/null
+++ b/src/include/delta.h
@@ -0,0 +1,83 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT 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 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @addtogroup VirtualTimers
+ * @{
+ */
+
+#ifndef _DELTA_H_
+#define _DELTA_H_
+
+#ifdef CH_USE_VIRTUAL_TIMERS
+
+/** Virtual Timer callback function.*/
+typedef void (*t_vtfunc)(void *);
+
+typedef struct VirtualTimer VirtualTimer;
+
+/**
+ * Virtual Timer descriptor structure.
+ */
+struct VirtualTimer {
+    /** Next timer in the delta list.*/
+    VirtualTimer    *vt_next;
+    /** Previous timer in the delta list.*/
+    VirtualTimer    *vt_prev;
+    /** Time delta before timeout.*/
+    t_time          vt_dtime;
+    /** Timer callback function pointer. The pointer is reset to zero after
+        the callback is invoked.*/
+    t_vtfunc        vt_func;
+    /** Timer callback function parameter.*/
+    void            *vt_par;
+};
+
+/**
+ * Delta List header.
+ * @note The delta list is implemented as a double link bidirectional list in
+ *       order to make the unlink time constant, the reset of a virtual timer
+ *       is often used in the code. An slower implementation using a single
+ *       link list is possible and might be added later with a
+ *       \p CH_OPTIMIZE_SPACE option.
+ */
+typedef struct {
+    /** Next timer in the list (the one that will be triggered next).*/
+    VirtualTimer    *dl_next;
+    /** Last timer in the list.*/
+    VirtualTimer    *dl_prev;
+    /** Not used but it must be set to /p MAXDELTA.*/
+    t_time          dl_dtime;
+} DeltaList;
+
+
+extern DeltaList dlist;
+
+/*
+ * Virtual Timers APIs.
+ */
+void chVTInit(void);
+void chVTSetI(VirtualTimer *vtp, t_time time, t_vtfunc vtfunc, void *par);
+void chVTResetI(VirtualTimer *vtp);
+
+#endif /* CH_USE_VIRTUAL_TIMER */
+
+#endif /* _DELTA_H_ */
+
+/** @} */
-- 
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