src/mapi/table.h

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