From 989c6b2e91a7d304f68f9f5997e7dae0e5f53b6c Mon Sep 17 00:00:00 2001
From: Matt Strapp <strap012@umn.edu>
Date: Wed, 28 Oct 2020 17:46:47 -0500
Subject: Add closequeue

---
 P2/lib/utils.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'P2/lib')

diff --git a/P2/lib/utils.c b/P2/lib/utils.c
index ede4931..8c27f4c 100644
--- a/P2/lib/utils.c
+++ b/P2/lib/utils.c
@@ -2,13 +2,20 @@
 
 int openQueue() {
 	int id = msgget(ftok("4061 Project 2 SS", 'S'), 0666 | IPC_CREAT);
-	if (id < 0)
-	{
+	if (id < 0) {
 		perror("Cannot open queue.\n");
 		return -1;
-	};
+	}
 	return id;
 }
+void closeQueue() {
+	int msgid = msgget(ftok("4061 Project 2 SS", 'S'), 0666);
+	if (msgid < 0) {
+		perror("Cannot open queue. It may already exist.\n");
+		exit(-1);
+	}
+	msgctl(msgid, IPC_RMID, NULL);
+}
 
 char *getChunkData(int mapperID) {
 	printf("GETTING CHUNK DATA\n");
-- 
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