Changeset 985e26d2 in mainline for uspace/lib/libc/include/atomicdflt.h

Timestamp:

2010-01-07T19:06:59Z (14 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

8190e63

Parents:

743e17b (diff), eca2435 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge mainline changes.

File:

• uspace/lib/libc/include/atomicdflt.h (moved) (moved from kernel/generic/include/stackarg.h ) (3 diffs)

uspace/lib/libc/include/atomicdflt.h

@@ -1 +1 @@
 /*
- * Copyright (c) 2005 Jakub Jermar
+ * Copyright (c) 2006 Jakub Jermar
  * All rights reserved.
  *
@@ -27 +27 @@
  */
 
-/** @addtogroup generic 
+/** @addtogroup libc
  * @{
  */
@@ -33 +33 @@
  */
 
-/*
- * Variable argument list manipulation macros
- * for architectures using stack to pass arguments.
- */
- 
-#ifndef KERN_STACKARG_H_
-#define KERN_STACKARG_H_
+#ifndef LIBC_ATOMICDFLT_H_
+#define LIBC_ATOMICDFLT_H_
 
-#include <arch/types.h>
+#ifndef LIBC_ARCH_ATOMIC_H_
+#error This file cannot be included directly, include atomic.h instead.
+#endif
 
-typedef struct va_list {
-        int pos;
-        uint8_t *last;
-} va_list;
+#include <bool.h>
 
-#define va_start(ap, lst)               \
-        (ap).pos = sizeof(lst);                         \
-        (ap).last = (uint8_t *) &(lst)
+typedef struct atomic {
+        volatile long count;
+} atomic_t;
 
-#define va_arg(ap, type)                \
-        (*((type *)((ap).last + ((ap).pos += sizeof(type)) - sizeof(type))))
+static inline void atomic_set(atomic_t *val, long i)
+{
+        val->count = i;
+}
 
-#define va_copy(dst, src) dst = src
-#define va_end(ap)
+static inline long atomic_get(atomic_t *val)
+{
+        return val->count;
+}
 
+#ifndef CAS 
+static inline bool cas(atomic_t *val, long ov, long nv)
+{
+        return __sync_bool_compare_and_swap(&val->count, ov, nv);
+}
+#endif
 
 #endif