Fix compilation errors

example2.c

@@ -1,6 +1,6 @@
 #include <stdio.h>
 #include <assert.h>
-#include "io.h"
+#include "io2.h"
 
 #define MAX_RES 100
 #define MAX_OPS 100
@@ -14,6 +14,12 @@ int main(void)
     struct io_operation ops[MAX_OPS];
     struct io_resource  res[MAX_RES];
     struct io_context ioc;
+    
+    if (!io_global_init()) {
+        fprintf(stderr, "Couldn't perform the global initialization\n");
+        return -1;
+    }
+
     if (!io_init(&ioc, res, ops, MAX_RES, MAX_OPS)) {
         fprintf(stderr, "Couldn't initialize I/O context\n");
         return -1;
@@ -24,7 +30,7 @@ int main(void)
         fprintf(stderr, "Couldn't start listening\n");
         return -1;
     }
-    if (!io_accept(&ioc, socket, NULL)) {
+    if (!io_accept(&ioc, NULL, socket)) {
         fprintf(stderr, "Couldn't start accept operation\n");
         return -1;
     }
@@ -40,12 +46,13 @@ int main(void)
 
         io_close(&ioc, accepted);
 
-        if (!io_accept(&ioc, socket)) {
+        if (!io_accept(&ioc, NULL, socket)) {
             fprintf(stderr, "Couldn't start accept operation\n");
             return -1;
         }
     }
 
-    io_context_free(&ioc);
+    io_free(&ioc);
+    io_global_free();
     return 0;
 }