1 files changed, 13 insertions, 0 deletions
diff --git a/atomic/unix/mutex.c b/atomic/unix/mutex.c
index 17b605fcd..cb23ede34 100644
--- a/atomic/unix/mutex.c
+++ b/atomic/unix/mutex.c
@@ -189,4 +189,17 @@ APR_DECLARE(void*) apr_atomic_casptr(volatile void **mem, void *with, const void
     return prev;
 }
 
+APR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem, void *with)
+{
+    void *prev;
+    DECLARE_MUTEX_LOCKED(mutex, mem);
+
+    prev = *mem;
+    *mem = with;
+
+    MUTEX_UNLOCK(mutex);
+
+    return prev;
+}
+
 #endif /* USE_ATOMICS_GENERIC */