Changeset d359e227 in mainline

Timestamp:

2009-12-01T20:19:00Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

41df2827

Parents:

d9ece1cb

Message:

Add cas().
Implemented using GCC built-in.

File:

• uspace/lib/libc/include/atomic.h (modified) (2 diffs)

uspace/lib/libc/include/atomic.h

@@ -36 +36 @@
 #define LIBC_ATOMIC_H_
 
+#include <bool.h>
+
 typedef struct atomic {
         volatile long count;
@@ -52 +54 @@
 }
 
+static inline bool cas(atomic_t *val, long ov, long nv)
+{
+        return __sync_bool_compare_and_swap(&val->count, ov, nv);
+}
+
 #endif