fixed a bug where the listener thread did not exit when ctrl+c was sent. updated license

2 files changed, 11 insertions, 7 deletions

diff --git a/LICENSE b/LICENSE
index fb57b38..553f98c 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright 2022 Kai Stevenson
+Copyright 2023 Kai Stevenson
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 
diff --git a/snake.c b/snake.c
index dc64d0a..f7097d9 100644
--- a/snake.c
+++ b/snake.c
@@ -2,15 +2,14 @@
 #include <stdlib.h>
 #include <time.h>
 #include <pthread.h>
-#include <signal.h> /* handling ctrl-c */
+#include <signal.h> //handling ctrl-c
 #include "vector.h"
 #include "snake.h"
 #include "conio.h"
 
 volatile sig_atomic_t INT_CTRL_C = 0;
 
-/* Unsafe functions like printf cannot be called in async
- * interrupt handler */
+// unsafe functions like printf cannot be called in async interrupt handler
 void interrupt_handler(int sig) {
 	INT_CTRL_C = 1;
 }
@@ -24,7 +23,7 @@ vector_t lastMoveDir;
 int main(int argc, char **argv) {
 	printf("\e[?25l"); /* hide cursor */
 
-	/* Make a new thread handling interrupts */	
+	//make a new thread handling interrupts
 	signal(SIGINT, interrupt_handler); 
 
 	//init values
@@ -51,10 +50,15 @@ int main(int argc, char **argv) {
 	pthread_create(&listenerID, NULL, get_dir_loop, &threadArg);
 	//main game logic loop
 	while(1) {
-		/* handle ctrl-c interrupt */
+		// handle ctrl-c interrupt
 		if (INT_CTRL_C) {
+			//unhide cursor
 			printf("\e[?25h");
-			exit(0);
+			//kill the listener thread
+			*cancellationToken = 1;
+			printf("Press any key to exit\n");
+			pthread_join(listenerID, NULL);
+			return 0;
 		}
 
 		//first, draw the current state of the board