diff packages/redboot/current/src/net/timers.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
parents
children e0c0827131d1
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new file mode 100644
--- /dev/null
+++ b/packages/redboot/current/src/net/timers.c
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+//==========================================================================
+//
+//      net/timers.c
+//
+//      Stand-alone networking support for RedBoot
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    gthomas
+// Contributors: gthomas
+// Date:         2000-07-14
+// Purpose:      
+// Description:  
+//              
+// This code is part of RedBoot (tm).
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <net/net.h>
+
+static timer_t *tmr_list;
+
+
+/*
+ * Set a timer. Caller is responsible for providing the timer_t struct.
+ */
+void
+__timer_set(timer_t *t, unsigned long delay,
+	    tmr_handler_t handler, void *user_data)
+{
+    timer_t *p;
+
+    t->delay = delay;
+    t->start = MS_TICKS();
+    t->handler = handler;
+    t->user_data = user_data;
+
+    for (p = tmr_list; p; p = p->next)
+	if (p == t) {
+	    return;
+	}
+
+    t->next = tmr_list;
+    tmr_list = t;
+}
+
+
+/*
+ * Remove a given timer from timer list.
+ */
+void
+__timer_cancel(timer_t *t)
+{
+    timer_t *prev, *p;
+
+    for (prev = NULL, p = tmr_list; p; prev = p, p = p->next)
+	if (p == t) {
+	    if (prev)
+		prev->next = p->next;
+	    else
+		tmr_list = p->next;
+	    return;
+	}
+}
+
+
+/*
+ * Poll timer list for timer expirations.
+ */
+void
+__timer_poll(void)
+{
+    timer_t *prev, *t;
+
+    prev = NULL;
+    t = tmr_list;
+    while (t) {
+	if ((MS_TICKS() - t->start) >= t->delay) {
+
+	    /* remove it before calling handler */
+	    if (prev)
+		prev->next = t->next;
+	    else
+		tmr_list = t->next;
+	    /* now, call the handler */
+	    t->handler(t->user_data);
+	    
+	    /*
+	     * handler may be time consuming, so start
+	     * from beginning of list.
+	     */
+	    prev = NULL;
+	    t = tmr_list;
+	} else {
+	    prev = t;
+	    t = t->next;
+	}
+    }
+}