--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/playground/main.c	Wed Sep 24 09:11:20 2025 -0700
@@ -0,0 +1,32 @@
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#define NUM_THREADS     5
+
+void *PrintHello(void *threadid)
+{
+   long tid;
+   tid = (long)threadid;
+   printf("Hello World! It's me, thread #%ld!\n", tid);
+   pthread_exit(NULL);
+}
+
+int main (int argc, char *argv[])
+{
+   pthread_t threads[NUM_THREADS];
+   int rc;
+   long t;
+   for(t = 0; t < NUM_THREADS; t++)
+   {
+      printf("In main: creating thread %ld\n", t);
+      rc = pthread_create(&threads[t], NULL, PrintHello, (void *)t);
+      if (rc)
+      {
+         printf("ERROR; return code from pthread_create() is %d\n", rc);
+         exit(-1);
+      }
+   }
+
+   /* Last thing that main() should do */
+   pthread_exit(NULL);
+}