Changes in uspace/lib/c/generic/io/vprintf.c [e08a733:369a5f8] in mainline

File:

• uspace/lib/c/generic/io/vprintf.c (modified) (2 diffs)

uspace/lib/c/generic/io/vprintf.c

@@ -37 +37 @@
 #include <unistd.h>
 #include <io/printf_core.h>
-#include <fibril_synch.h>
+#include <futex.h>
 #include <async.h>
 #include <str.h>
 
-static FIBRIL_MUTEX_INITIALIZE(printf_mutex);
+static atomic_t printf_futex = FUTEX_INITIALIZER;
 
 static int vprintf_str_write(const char *str, size_t size, void *stream)
@@ -85 +85 @@
          * Prevent other threads to execute printf_core()
          */
-        fibril_mutex_lock(&printf_mutex);
+        futex_down(&printf_futex);
+        
+        /*
+         * Prevent other fibrils of the same thread
+         * to execute printf_core()
+         */
+        async_serialize_start();
         
         int ret = printf_core(fmt, &ps, ap);
         
-        fibril_mutex_unlock(&printf_mutex);
+        async_serialize_end();
+        futex_up(&printf_futex);
         
         return ret;