1 files changed, 47 insertions, 0 deletions
diff --git a/dbus/dbus-sysdeps-unix.c b/dbus/dbus-sysdeps-unix.c
index f4afad89..9b6457b2 100644
--- a/dbus/dbus-sysdeps-unix.c
+++ b/dbus/dbus-sysdeps-unix.c
@@ -1428,6 +1428,53 @@ _dbus_getuid (void)
   return getuid ();
 }
 
+/**
+ * Atomically increments an integer
+ *
+ * @param atomic pointer to the integer to increment
+ * @returns the value before incrementing
+ *
+ * @todo implement arch-specific faster atomic ops
+ */
+dbus_int32_t
+_dbus_atomic_inc (DBusAtomic *atomic)
+{
+#ifdef DBUS_USE_ATOMIC_INT_486
+  return atomic_exchange_and_add (atomic, 1);
+#else
+  dbus_int32_t res;
+  _DBUS_LOCK (atomic);
+  res = atomic->value;
+  atomic->value += 1;
+  _DBUS_UNLOCK (atomic);
+  return res;
+#endif
+}
+
+/**
+ * Atomically decrement an integer
+ *
+ * @param atomic pointer to the integer to decrement
+ * @returns the value before decrementing
+ *
+ * @todo implement arch-specific faster atomic ops
+ */
+dbus_int32_t
+_dbus_atomic_dec (DBusAtomic *atomic)
+{
+#ifdef DBUS_USE_ATOMIC_INT_486
+  return atomic_exchange_and_add (atomic, -1);
+#else
+  dbus_int32_t res;
+  
+  _DBUS_LOCK (atomic);
+  res = atomic->value;
+  atomic->value -= 1;
+  _DBUS_UNLOCK (atomic);
+  return res;
+#endif
+}
+
 #ifdef DBUS_BUILD_TESTS
 /** Gets our GID
  * @returns process GID