1 files changed, 79 insertions, 0 deletions
diff --git a/pcp/pcpdtimer.c b/pcp/pcpdtimer.c
new file mode 100644
index 0000000..7349b9a
--- /dev/null
+++ b/pcp/pcpdtimer.c
@@ -0,0 +1,79 @@
+/*
+** Copyright 2001 Double Precision, Inc.  See COPYING for
+** distribution information.
+*/
+
+
+#include "config.h"
+#include "pcpdtimer.h"
+#include <string.h>
+#include <time.h>
+
+extern struct pcpdtimer *first_timer, *last_timer;
+
+struct pcpdtimer *first_timer=NULL, *last_timer=NULL;
+
+void pcpdtimer_install(struct pcpdtimer *p, time_t nseconds)
+{
+	struct pcpdtimer *q;
+
+	if (p->alarm)
+	{
+		if (p->prev)
+			p->prev->next=p->next;
+		else
+			first_timer=p->next;
+
+		if (p->next)
+			p->next->prev=p->prev;
+		else
+			last_timer=p->prev;
+	}
+
+	time(&p->alarm);
+	p->alarm += nseconds;
+
+	for (q=first_timer; q; q=q->next)
+	{
+		if (q->alarm > p->alarm)
+			break;
+	}
+
+	if (!q)
+	{
+		if ((p->prev=last_timer) != 0)
+			p->prev->next=p;
+		else
+			first_timer=p;
+		p->next=0;
+		last_timer=p;
+	}
+	else
+	{
+		if ((p->prev=q->prev) != 0)
+			p->prev->next=p;
+		else
+			first_timer=p;
+
+		p->next=q;
+		q->prev=p;
+	}
+}
+
+void pcpdtimer_triggered(struct pcpdtimer *p)
+{
+	if (!p->alarm)
+		return;
+
+	if (p->prev)
+		p->prev->next=p->next;
+	else
+		first_timer=p->next;
+
+	if (p->next)
+		p->next->prev=p->prev;
+	else
+		last_timer=p->prev;
+
+	p->alarm=0;
+}