2 * Copyright © 2011 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Benjamin Franzke <benjaminfranzke@googlemail.com>
37 #define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
39 extern const struct gbm_backend gbm_dri_backend
;
43 const struct gbm_backend
*builtin
;
46 static const struct backend_desc backends
[] = {
47 { "gbm_dri.so", &gbm_dri_backend
},
48 { "gbm_gallium_drm.so", NULL
},
52 load_backend(const struct backend_desc
*backend
)
55 const void *init
= NULL
;
58 const char *entrypoint
= "gbm_backend";
65 if (backend
->builtin
) {
66 init
= backend
->builtin
;
69 snprintf(path
, sizeof path
, MODULEDIR
"/%s", name
);
71 snprintf(path
, sizeof path
, "%s", name
);
73 module
= dlopen(path
, RTLD_NOW
| RTLD_GLOBAL
);
76 "failed to load module: %s\n", dlerror());
80 init
= dlsym(module
, entrypoint
);
88 static const struct backend_desc
*
89 find_backend(const char *name
)
91 const struct backend_desc
*backend
= NULL
;
94 for (i
= 0; i
< ARRAY_SIZE(backends
); ++i
) {
95 if (strcmp(backends
[i
].name
, name
) == 0) {
96 backend
= &backends
[i
];
105 _gbm_create_device(int fd
)
107 const struct gbm_backend
*backend
= NULL
;
108 struct gbm_device
*dev
= NULL
;
112 b
= getenv("GBM_BACKEND");
114 backend
= load_backend(find_backend(b
));
117 dev
= backend
->create_device(fd
);
119 for (i
= 0; i
< ARRAY_SIZE(backends
) && dev
== NULL
; ++i
) {
120 backend
= load_backend(&backends
[i
]);
124 dev
= backend
->create_device(fd
);