src/mapi/mapi/table.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright (C) 2010 LunarG Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Chia-I Wu <olv@lunarg.com>
  27  */
  28
  29 #ifndef _TABLE_H_
  30 #define _TABLE_H_
  31
  32 #include "u_compiler.h"
  33 #include "stub.h"
  34
  35 #define MAPI_TMP_DEFINES
  36 #include "mapi_tmp.h"
  37
  38 struct mapi_table {
  39 #define MAPI_TMP_TABLE
  40 #include "mapi_tmp.h"
  41    mapi_func last;
  42 };
  43
  44 extern const mapi_func table_noop_array[];
  45
  46 /**
  47  * Get the no-op dispatch table.
  48  */
  49 static INLINE const struct mapi_table *
  50 table_get_noop(void)
  51 {
  52    return (const struct mapi_table *) table_noop_array;
  53 }
  54
  55 /**
  56  * Update the dispatch table to dispatch a stub to the given function.
  57  */
  58 static INLINE void
  59 table_set_func(struct mapi_table *tbl,
  60                const struct mapi_stub *stub, mapi_func func)
  61 {
  62    mapi_func *funcs = (mapi_func *) tbl;
  63    funcs[stub->slot] = func;
  64 }
  65
  66 /**
  67  * Return the dispatched function of a stub.
  68  */
  69 static INLINE mapi_func
  70 table_get_func(const struct mapi_table *tbl, const struct mapi_stub *stub)
  71 {
  72    const mapi_func *funcs = (const mapi_func *) tbl;
  73    return funcs[stub->slot];
  74 }
  75
  76 #endif /* _TABLE_H_ */