Changeset e08a733 in mainline for uspace/lib/c/generic/io/vprintf.c

Timestamp:

2011-01-08T21:35:01Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

339dfc5

Parents:

61bfc370

Message:

Use lightweight fibril synchronization in vprintf().

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