From 5b22490ecfe3c0b6b86704715c02632c23159be1 Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Wed, 9 Feb 2000 06:43:52 +0000
Subject: [PATCH] This file somehow disappeared from the repository

---
 comedi/rt.c | 129 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 comedi/rt.c

diff --git a/comedi/rt.c b/comedi/rt.c
new file mode 100644
index 00000000..9be02eb8
--- /dev/null
+++ b/comedi/rt.c
@@ -0,0 +1,129 @@
+/*
+    comedi/rt.c
+    comedi kernel module
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 1997-2000 David A. Schleef <ds@stm.lbl.gov>
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#undef DEBUG
+
+#include <comedi_module.h>
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/fcntl.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/malloc.h>
+#include <asm/io.h>
+
+
+
+static struct comedi_irq_struct *comedi_irqs;
+
+int comedi_request_irq(unsigned irq,void (*handler)(int, void *,struct pt_regs *),
+		unsigned long flags,const char *device,void *dev_id)
+{
+	struct comedi_irq_struct *it;
+	int ret;
+
+	it=kmalloc(sizeof(*it),GFP_KERNEL);
+	if(!it)
+		return -ENOMEM;
+
+	it->handler=handler;
+	it->irq=irq;
+	it->dev_id=dev_id;
+	it->flags=flags;
+
+	ret=request_irq(irq,handler,flags&~SA_PRIORITY,device,dev_id);
+	if(ret<0){
+		kfree(it);
+		return ret;
+	}
+
+	if(flags&SA_PRIORITY){
+		get_priority_irq(it);
+	}
+
+	it->next=comedi_irqs;
+	comedi_irqs=it;
+
+	return 0;
+}
+
+int comedi_change_irq_flags(unsigned int irq,void *dev_id,unsigned long flags)
+{
+	struct comedi_irq_struct *it;
+
+	it=get_irq_struct(irq);
+	if(it){
+		if((it->flags&~SA_PRIORITY)!=(flags&~SA_PRIORITY))
+			return -EINVAL;
+
+		if((it->flags&SA_PRIORITY)==(flags&SA_PRIORITY))
+			return 0;
+
+		it->flags=flags;
+		if(flags&SA_PRIORITY){
+			return get_priority_irq(it);
+		}else{
+			return free_priority_irq(it);
+		}
+	}
+
+	return -EINVAL;
+}
+
+void comedi_free_irq(unsigned int irq,void *dev_id)
+{
+	struct comedi_irq_struct *it,*prev;
+
+	prev=NULL;
+	for(it=comedi_irqs;it;it=it->next){
+		if(it->irq==irq){
+			break;
+		}
+		prev=it;
+	}
+	if(it->flags&SA_PRIORITY)
+		free_priority_irq(it);
+
+	free_irq(it->irq,it->dev_id);
+
+	if(prev) prev->next=it->next;
+	else comedi_irqs=it->next;
+
+	kfree(it);
+}
+
+struct comedi_irq_struct *get_irq_struct(unsigned int irq)
+{
+	struct comedi_irq_struct *it;
+
+	for(it=comedi_irqs;it;it=it->next){
+		if(it->irq==irq){
+			return it;
+		}
+	}
+	return NULL;
+}
+
-- 
2.26.2