Changeset 73838ed in mainline for arch/amd64/include

Timestamp:

2005-09-01T19:21:37Z (20 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

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

Children:

7df54df

Parents:

437e35a0

Message:

Cleanups so that it compiles on ia-32 & amd-64 cleanly

File:

• arch/amd64/include/atomic.h (modified) (1 diff)

arch/amd64/include/atomic.h

@@ -30 +30 @@
 #define __amd64_ATOMIC_H__
 
-/*
- * TODO: these are just placeholders for real implementations of atomic_inc and atomic_dec.
- * WARNING: the following functions cause the code to be preemption-unsafe !!!
- */
 
-static inline atomic_inc(volatile int *val) {
-        *val++;
+/* Count_t is 32-bits on AMD-64 */
+static inline void atomic_inc(volatile count_t *val) {
+#ifdef __SMP__
+        __asm__ volatile ("lock incl (%0)\n" : : "r" (val));
+#else
+        __asm__ volatile ("incl (%0)\n" : : "r" (val));
+#endif /* __SMP__ */
 }
 
-static inline atomic_dec(volatile int *val) {
-        *val--;
+static inline void atomic_dec(volatile count_t *val) {
+#ifdef __SMP__
+        __asm__ volatile ("lock decl (%0)\n" : : "r" (val));
+#else
+        __asm__ volatile ("decl (%0)\n" : : "r" (val));
+#endif /* __SMP__ */
 }