Import Upstream version 2.72.4

gobject/gatomicarray.h

@@ -0,0 +1,58 @@
+/* GObject - GLib Type, Object, Parameter and Signal Library
+ * Copyright (C) 2009 Benjamin Otte <otte@gnome.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __G_ATOMIC_ARRAY_H__
+#define __G_ATOMIC_ARRAY_H__
+
+#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
+#error "Only <glib-object.h> can be included directly."
+#endif
+
+#include <glib/glib.h>
+
+G_BEGIN_DECLS
+
+#define G_ATOMIC_ARRAY_DATA_SIZE(mem) (*((gsize *) (mem) - 1))
+
+typedef struct _GAtomicArray GAtomicArray;
+struct _GAtomicArray {
+  gpointer data;  /* elements - atomic */
+};
+
+void     _g_atomic_array_init   (GAtomicArray *array);
+gpointer _g_atomic_array_copy   (GAtomicArray *array,
+				 gsize         header_size,
+				 gsize         additional_element_size);
+void     _g_atomic_array_update (GAtomicArray *array,
+				 gpointer      new_data);
+
+#define  G_ATOMIC_ARRAY_GET_LOCKED(_array, _type) ((_type *)((_array)->data))
+
+#define G_ATOMIC_ARRAY_DO_TRANSACTION(_array, _type, _C_) G_STMT_START {	\
+    gpointer *_datap  = &(_array)->data;				\
+    _type *transaction_data, *__check;						\
+										\
+    __check = g_atomic_pointer_get (_datap);					\
+    do {									\
+      transaction_data = __check;						\
+      {_C_;}									\
+      __check = g_atomic_pointer_get (_datap);					\
+    } while (transaction_data != __check);					\
+  } G_STMT_END
+
+G_END_DECLS
+
+#endif	/* __G_ATOMIC_ARRAY_H__ */