thread example

~/C/thread.c

@@ -0,0 +1,31 @@
+/* https://www.geeksforgeeks.org/multithreading-in-c/ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <pthread.h>
+
+int g = 0;
+
+void *my_thread(void *vargp) {
+  int *id = (int *)vargp;
+
+  static int s = 0;
+
+  ++s;
+  ++g;
+
+  printf("Thread ID: %d, Static: %d, Global: %d\n", *id, ++s, ++g);
+}
+
+int main() {
+  pthread_t tid;
+
+  int i;
+  for (i = 0; i < 3; i++)
+    pthread_create(&tid, NULL, my_thread, (void *)&tid);
+
+  pthread_exit(NULL);
+
+  return 0;
+}