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d42e7319 JB |
1 | /* |
2 | * Copyright (c) 2012 Simon Busch <morphis@gravedo.de> | |
3 | * | |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <dlfcn.h> | |
19 | #include <stddef.h> | |
20 | #include <android/hardware/hardware.h> | |
21 | #include <hybris/internal/binding.h> | |
22 | ||
23 | static void *_libhardware = NULL; | |
24 | ||
25 | static int (*_hw_get_module)(const char *id, const struct hw_module_t **module) = NULL; | |
26 | ||
27 | static int (*_hw_get_module_by_class)(const char *class_id, const char *inst, const struct hw_module_t **module) = NULL; | |
28 | ||
29 | #define HARDWARE_DLSYM(fptr, sym) do { if (_libhardware == NULL) { _init_lib_hardware(); }; if (*(fptr) == NULL) { *(fptr) = (void *) android_dlsym(_libhardware, sym); } } while (0) | |
30 | ||
31 | static void _init_lib_hardware() | |
32 | { | |
33 | _libhardware = (void *) android_dlopen("/system/lib/libhardware.so", RTLD_LAZY); | |
34 | } | |
35 | ||
36 | int hw_get_module(const char *id, const struct hw_module_t **module) | |
37 | { | |
38 | HARDWARE_DLSYM(&_hw_get_module, "hw_get_module"); | |
39 | return (*_hw_get_module)(id, module); | |
40 | } | |
41 | ||
42 | int hw_get_module_by_class(const char *class_id, const char *inst, | |
43 | const struct hw_module_t **module) | |
44 | { | |
45 | HARDWARE_DLSYM(&_hw_get_module_by_class, "hw_get_module_by_class"); | |
46 | return (*_hw_get_module_by_class)(class_id, inst, module); | |
47 | } | |
48 | ||
49 | // vim:ts=4:sw=4:noexpandtab |