blob: bc024a11c0b745725a855da5d02811d46effece6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Types.h"
#include "prlink.h"
#include <gbm/gbm.h>
#define GET_FUNC(func, lib) \
func##_fn = \
(decltype(func##_fn))PR_FindFunctionSymbol(lib, #func) \
#define IS_FUNC_LOADED(func) \
(func != nullptr) \
static struct gbm_device * (*gbm_create_device_fn)(int fd);
static void (*gbm_device_destroy_fn)(struct gbm_device* gbm);
bool IsGBMLibraryLoaded() {
static bool isLoaded =
(IS_FUNC_LOADED(gbm_create_device_fn) &&
IS_FUNC_LOADED(gbm_device_destroy_fn));
return isLoaded;
}
bool LoadGBMLibrary() {
static PRLibrary* gbmLib = nullptr;
static bool gbmInitialized = false;
//TODO Thread safe
if (!gbmInitialized) {
gbmInitialized = true;
gbmLib = PR_LoadLibrary("libgbm.so.1");
if (!gbmLib) {
return false;
}
GET_FUNC(gbm_create_device, gbmLib);
GET_FUNC(gbm_device_destroy, gbmLib);
}
return IsGBMLibraryLoaded();
}
struct gbm_device *
gbm_create_device(int fd)
{
if (!LoadGBMLibrary()) {
return nullptr;
}
return gbm_create_device_fn(fd);
}
void
gbm_device_destroy(struct gbm_device* gbm)
{
if (!LoadGBMLibrary()) {
return;
}
return gbm_device_destroy_fn(gbm);
}
|
