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

1 files changed, 10 insertions, 6 deletions

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