Changeset 9ce35f0 in mainline

Timestamp:

2018-03-26T15:21:43Z (6 years ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

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

Children:

fd57745c

Parents:

48974d6

Message:

Add two missing intrinsics for arm32.

File:

• kernel/arch/arm32/src/atomic.c (modified) (1 diff)

kernel/arch/arm32/src/atomic.c

@@ -66 +66 @@
 }
 
+/* Naive implementations of the newer intrinsics. */
+
+_Bool __atomic_compare_exchange_4(void **mem, void **expected, void *desired, _Bool weak, int success, int failure)
+{
+        (void) weak;
+        (void) success;
+        (void) failure;
+
+        void *old = *expected;
+        void *new = __sync_val_compare_and_swap_4(mem, old, desired);
+        if (old == new) {
+                return 1;
+        } else {
+                *expected = new;
+                return 0;
+        }
+}
+
+void *__atomic_exchange_4(void **mem, void *val, int model)
+{
+        (void) model;
+
+        irq_spinlock_lock(&cas_lock, true);
+        void *old = *mem;
+        *mem = val;
+        irq_spinlock_unlock(&cas_lock, true);
+
+        return old;
+}
 
 /** @}