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 /* a more clever scheme would be to discover backends in a certain
42 static const char *backends[] = {
47 load_backend(const char *name)
51 const char *entrypoint = "gbm_backend";
54 snprintf(path, sizeof path, MODULEDIR "/%s", name);
56 snprintf(path, sizeof path, "%s", name);
58 module = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
60 fprintf(stderr, "failed to load module: %s\n", dlerror());
64 return dlsym(module, entrypoint);
68 _gbm_create_device(int fd)
70 const struct gbm_backend *backend = NULL;
71 struct gbm_device *dev = NULL;
75 b = getenv("GBM_BACKEND");
77 backend = load_backend(b);
80 dev = backend->create_device(fd);
82 for (i = 0; i < ARRAY_SIZE(backends) && dev == NULL; ++i) {
83 backend = load_backend(backends[i]);
86 fprintf(stderr, "loaded module: %s\n", backends[i]);
87 dev = backend->create_device(fd);