Changeset 3dbe2d1f in mainline for uspace/libc/generic/io/vprintf.c

Timestamp:

2007-04-07T18:00:18Z (18 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

2a98e58

Parents:

5b303ba

Message:

use futex instead of pthread serialization
synchronize only output to stdout
cleanup

File:

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

uspace/libc/generic/io/vprintf.c

@@ -37 +37 @@
 #include <unistd.h>
 #include <io/printf_core.h>
+#include <futex.h>
 
-int vprintf_write(const char *str, size_t count, void *unused);
+atomic_t printf_futex = FUTEX_INITIALIZER;
 
-int vprintf_write(const char *str, size_t count, void *unused)
+static int vprintf_write(const char *str, size_t count, void *unused)
 {
         return write(1, str, count);
@@ -52 +53 @@
 int vprintf(const char *fmt, va_list ap)
 {
-        struct printf_spec ps = {(int(*)(void *, size_t, void *))vprintf_write, NULL};
-        return printf_core(fmt, &ps, ap);
-
+        struct printf_spec ps = {(int(*)(void *, size_t, void *)) vprintf_write, NULL};
+        
+        futex_down(&printf_futex);
+        int ret = printf_core(fmt, &ps, ap);
+        futex_up(&printf_futex);
+        
+        return ret;
 }