From 39aad5014c2aedc947427403c7986eae43f91257 Mon Sep 17 00:00:00 2001
From: markster <markster@5390a7c7-147a-4af0-8ec9-7488f05a26cb>
Date: Wed, 29 May 2002 16:02:30 +0000
Subject: Version 0.2.0 from FTP

git-svn-id: http://svn.digium.com/svn/zaptel/trunk@81 5390a7c7-147a-4af0-8ec9-7488f05a26cb
---
 ztdynamic.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

(limited to 'ztdynamic.c')

diff --git a/ztdynamic.c b/ztdynamic.c
index 21677bc..aa81fea 100755
--- a/ztdynamic.c
+++ b/ztdynamic.c
@@ -30,6 +30,7 @@
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/kmod.h>
+#include <linux/sched.h>
 #ifdef CONFIG_DEVFS_FS
 #include <linux/devfs_fs_kernel.h>
 #endif
@@ -688,9 +689,48 @@ void zt_dynamic_unregister(struct zt_dynamic_driver *dri)
 	spin_unlock_irqrestore(&dlock, flags);
 }
 
+struct timer_list alarmcheck;
+
+static void check_for_red_alarm(unsigned long ignored)
+{
+	long flags;
+	int newalarm;
+	int alarmchanged = 0;
+	struct zt_dynamic *z;
+	spin_lock_irqsave(&dlock, flags);
+	z = dspans;
+	while(z) {
+		newalarm = z->span.alarms & ~ZT_ALARM_RED;
+		/* If nothing received for a minute, consider that RED ALARM */
+		if ((jiffies - z->rxjif) > 1000 / HZ) {
+			newalarm |= ZT_ALARM_RED;
+			if (z->span.alarms != newalarm) {
+				z->span.alarms = newalarm;
+				zt_alarm_notify(&z->span);
+				alarmchanged++;
+			}
+		}
+		z = z->next;
+	}
+	spin_unlock_irqrestore(&dlock, flags);
+	if (alarmchanged)
+		checkmaster();
+
+	/* Do the next one */
+	mod_timer(&alarmcheck, jiffies + 1 * HZ);
+	
+}
+
 int ztdynamic_init(void)
 {
 	zt_set_dynamic_ioctl(ztdynamic_ioctl);
+	/* Start process to check for RED ALARM */
+	init_timer(&alarmcheck);
+	alarmcheck.expires = 0;
+	alarmcheck.data = 0;
+	alarmcheck.function = check_for_red_alarm;
+	/* Check once per second */
+	mod_timer(&alarmcheck, jiffies + 1 * HZ);
 	printk("Zaptel Dynamic Span support LOADED\n");
 	return 0;
 }
@@ -698,6 +738,7 @@ int ztdynamic_init(void)
 void ztdynamic_cleanup(void)
 {
 	zt_set_dynamic_ioctl(NULL);
+	del_timer(&alarmcheck);
 	printk("Zaptel Dynamic Span support unloaded\n");
 }
 
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