Changeset 6601f9b in mainline for kernel/arch/sparc32/src/sparc32.c

Timestamp:

2014-10-09T15:46:34Z (10 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

ad05baf

Parents:

e8f3637

Message:

Provide a dummy implementation of sparc32 atomic_compare_exchange_4().

File:

• kernel/arch/sparc32/src/sparc32.c (modified) (2 diffs)

kernel/arch/sparc32/src/sparc32.c

@@ -37 +37 @@
 #include <arch/interrupt.h>
 #include <arch/asm.h>
+#include <arch/barrier.h>
 #include <arch/machine_func.h>
 #include <func.h>
@@ -169 +170 @@
 }
 
+bool __atomic_compare_exchange_4(uint32_t *ptr, uint32_t *expected,
+    uint32_t desired, bool weak, int success_mm, int failure_mm)
+{
+        ipl_t ipl;
+        bool success;
+
+        /* XXX: This is a rather dummy implementation. */
+
+        ipl = interrupts_disable();
+        memory_barrier();
+        if (*ptr == *expected) {
+                success = true;
+                *ptr = desired;
+        } else {
+                success = false;
+                *expected = *ptr;
+        }
+        memory_barrier();
+        interrupts_restore(ipl);
+
+        return success;
+}
+
 /** @}
  */