mapi: Add a generic C dispatcher.

The idea is to have an API generate a header using mapi_abi.py.  The API
can then use the header to build a dispatcher.

1 files changed, 76 insertions, 0 deletions

diff --git a/src/mapi/mapi/table.h b/src/mapi/mapi/table.h
new file mode 100644
index 0000000000..48c99018aa
--- /dev/null
+++ b/src/mapi/mapi/table.h
@@ -0,0 +1,76 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.9
+ *
+ * Copyright (C) 2010 LunarG Inc.
+ *
+ * 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.
+ *
+ * Authors:
+ *    Chia-I Wu <olv@lunarg.com>
+ */
+
+#ifndef _TABLE_H_
+#define _TABLE_H_
+
+#include "u_compiler.h"
+#include "stub.h"
+
+#define MAPI_TMP_DEFINES
+#include "mapi_tmp.h"
+
+struct mapi_table {
+#define MAPI_TMP_TABLE
+#include "mapi_tmp.h"
+   mapi_func last;
+};
+
+extern const mapi_func table_noop_array[];
+
+/**
+ * Get the no-op dispatch table.
+ */
+static INLINE const struct mapi_table *
+table_get_noop(void)
+{
+   return (const struct mapi_table *) table_noop_array;
+}
+
+/**
+ * Update the dispatch table to dispatch a stub to the given function.
+ */
+static INLINE void
+table_set_func(struct mapi_table *tbl,
+               const struct mapi_stub *stub, mapi_func func)
+{
+   mapi_func *funcs = (mapi_func *) tbl;
+   funcs[stub->slot] = func;
+}
+
+/**
+ * Return the dispatched function of a stub.
+ */
+static INLINE mapi_func
+table_get_func(const struct mapi_table *tbl, const struct mapi_stub *stub)
+{
+   const mapi_func *funcs = (const mapi_func *) tbl;
+   return funcs[stub->slot];
+}
+
+#endif /* _TABLE_H_ */