libs/vkd3d-common: Add convenience library for shared code.

include/private/vkd3d_common.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2016 Józef Kucia for CodeWeavers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __VKD3D_COMMON_H
+#define __VKD3D_COMMON_H
+
+#include "config.h"
+#include "vkd3d_windows.h"
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
+
+#ifndef _WIN32
+# if HAVE_SYNC_ADD_AND_FETCH
+static inline ULONG InterlockedIncrement(ULONG volatile *x)
+{
+    return __sync_add_and_fetch(x, 1);
+}
+# else
+#  error "InterlockedIncrement not implemented for this platform"
+# endif  /* HAVE_SYNC_ADD_AND_FETCH */
+
+# if HAVE_SYNC_SUB_AND_FETCH
+static inline ULONG InterlockedDecrement(ULONG volatile *x)
+{
+    return __sync_sub_and_fetch(x, 1);
+}
+# else
+#  error "InterlockedDecrement not implemented for this platform"
+# endif
+#endif  /* _WIN32 */
+
+#endif  /* __VKD3D_COMMON_H */