Changeset 59e07c91 in mainline for arch/ia64/include

Timestamp:

2005-11-10T13:56:26Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

0172eba

Parents:

13fe013

Message:

Define atomic_t type.

File:

• arch/ia64/include/atomic.h (modified) (1 diff)

arch/ia64/include/atomic.h

@@ -30 +30 @@
 #define __ia64_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 !!!
+#include <arch/types.h>
+
+typedef volatile __u64 atomic_t;
+
+static inline atomic_t atomic_add(atomic_t *val, int imm)
+{
+        atomic_t v;
+
+/*      
+ *      __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "=m" (val) : "i" (imm));
  */
-
-static inline atomic_inc(volatile int *val) {
-        *val++;
+        *val += imm;
+        
+        return v;
 }
 
-static inline atomic_dec(volatile int *val) {
-        *val--;
-}
+static inline atomic_t atomic_inc(atomic_t *val) { return atomic_add(val, 1); }
+static inline atomic_t atomic_dec(atomic_t *val) { return atomic_add(val, -1); }
 
 #endif