Changeset 45c8eea in mainline for uspace/lib/c/generic/io/kio.c

Timestamp:

2018-11-11T15:47:39Z (6 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

f4cb6c5f

Parents:

269bc459

git-author:

Jakub Jermar <jakub@…> (2018-11-10 17:49:44)

git-committer:

Jakub Jermar <jakub@…> (2018-11-11 15:47:39)

Message:

Preallocate waitq handle during initialization

Do not clutter futex_down_composable() with the preallocation of the
wait queue handle and do it single-threadedly in futex_initialize().

File:

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

uspace/lib/c/generic/io/kio.c

@@ -38 +38 @@
 #include <str.h>
 #include <stdint.h>
+#include <stdlib.h>
 #include <errno.h>
 #include <abi/kio.h>
@@ -53 +54 @@
         char data[KIO_BUFFER_SIZE];
         size_t used;
-} kio_buffer = { .futex = FUTEX_INITIALIZER, };
+} kio_buffer;
+
+void __kio_init(void)
+{
+        if (futex_initialize(&kio_buffer.futex, 1) != EOK)
+                abort();
+}
 
 errno_t kio_write(const void *buf, size_t size, size_t *nwritten)