1 /* Copyright © 2013, Intel Corporation
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 /* Lookup a function named 'name' in the underlying, real, libGL.so */
27 glwrap_lookup (char *name);
29 /* Defer to the real 'function' (from libGL.so) to do the real work.
30 * The symbol is looked up once and cached in a static variable for
33 #define GLWRAP_DEFER(function,...) do { \
34 static typeof(&function) real_ ## function; \
35 if (! real_ ## function) \
36 real_ ## function = glwrap_lookup (#function); \
37 real_ ## function(__VA_ARGS__); \
40 /* As GLWRAP_DEFER, but also set 'ret' to the return value */
41 #define GLWRAP_DEFER_WITH_RETURN(ret, function,...) do { \
42 static typeof(&function) real_ ## function; \
43 if (! real_ ## function) \
44 real_ ## function = glwrap_lookup (#function); \
45 (ret) = real_ ## function(__VA_ARGS__); \