1 files changed, 52 insertions, 0 deletions
diff --git a/lab05/threads-solution.c b/lab05/threads-solution.c
new file mode 100644
index 0000000..7437c0f
--- /dev/null
+++ b/lab05/threads-solution.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+int global;
+
+void * thread(void *joiner)
+{
+	void *status;
+
+	global = pthread_self();
+	sleep(1);
+	printf("Parent PID is %d, TID is %d, global = %d\n",
+		getppid(), pthread_self(), global);
+
+	if (joiner) {
+		if (pthread_join((pthread_t)joiner, &status)) {
+			exit(1);
+		}
+	}
+
+	pthread_exit((void*) 0);
+}
+
+int main(void)
+{
+	void           *status;
+	int             x;
+	pthread_attr_t  attr;
+	pthread_t       curr_thr_id;
+	pthread_t       prev_thr_id;
+
+	if (pthread_attr_init(&attr)) {
+		exit(1);
+	}
+	if (pthread_attr_setschedpolicy(&attr, SCHED_RR)) {
+		exit(1);
+	}
+
+	/* Start 3 threads */
+	prev_thr_id = 0;
+	for (x=0; x<3; x++) {
+		if (pthread_create(&curr_thr_id, &attr, thread, (void*)prev_thr_id)) {
+			exit(1);
+	        }
+		prev_thr_id = curr_thr_id;
+	}
+
+	/* Join last thread */
+	pthread_join(curr_thr_id, &status);
+}