Add mutex userspace / syscalls.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/sys/init/init_main.C b/src/sys/init/init_main.C
index 8be5ae6c3..efeddcafd 100644
--- a/src/sys/init/init_main.C
+++ b/src/sys/init/init_main.C
@@ -1,10 +1,15 @@
 #include <kernel/console.H>  // TODO : Remove this.
 
 #include <sys/task.h>
+#include <sys/mutex.h>
+
+mutex_t global_mutex;
 
 void init_child(void* unused)
 {
+    mutex_lock(global_mutex);
     printk("Here I am %d\n", task_gettid());
+    mutex_unlock(global_mutex);
     task_end();
 }
 
@@ -12,10 +17,14 @@ void init_main(void* unused)
 {
     printk("Starting init!\n");
 
+    global_mutex = mutex_create();
+
     while(1)
     {
+	mutex_lock(global_mutex);
 	int t = task_create(&init_child, NULL);
 	printk("Created child %d\n", t);
 	for (volatile int i = 0 ; i < 10000000; i++);
+	mutex_unlock(global_mutex);
     }
 }