SDL 2.0
SDL_kmsdrmdyn.c
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1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20*/
21
22#include "../../SDL_internal.h"
23
24#if SDL_VIDEO_DRIVER_KMSDRM
25
26#define DEBUG_DYNAMIC_KMSDRM 0
27
28#include "SDL_kmsdrmdyn.h"
29
30#if DEBUG_DYNAMIC_KMSDRM
31#include "SDL_log.h"
32#endif
33
34#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
35
36#include "SDL_name.h"
37#include "SDL_loadso.h"
38
39typedef struct
40{
41 void *lib;
42 const char *libname;
43} kmsdrmdynlib;
44
45#ifndef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
46#define SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC NULL
47#endif
48#ifndef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC_GBM
49#define SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC_GBM NULL
50#endif
51
52static kmsdrmdynlib kmsdrmlibs[] = {
53 {NULL, SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC},
54 {NULL, SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC_GBM}
55};
56
57static void *
58KMSDRM_GetSym(const char *fnname, int *pHasModule)
59{
60 int i;
61 void *fn = NULL;
62 for (i = 0; i < SDL_TABLESIZE(kmsdrmlibs); i++) {
63 if (kmsdrmlibs[i].lib != NULL) {
64 fn = SDL_LoadFunction(kmsdrmlibs[i].lib, fnname);
65 if (fn != NULL)
66 break;
67 }
68 }
69
70#if DEBUG_DYNAMIC_KMSDRM
71 if (fn != NULL)
72 SDL_Log("KMSDRM: Found '%s' in %s (%p)\n", fnname, kmsdrmlibs[i].libname, fn);
73 else
74 SDL_Log("KMSDRM: Symbol '%s' NOT FOUND!\n", fnname);
75#endif
76
77 if (fn == NULL)
78 *pHasModule = 0; /* kill this module. */
79
80 return fn;
81}
82
83#endif /* SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC */
84
85/* Define all the function pointers and wrappers... */
86#define SDL_KMSDRM_MODULE(modname) int SDL_KMSDRM_HAVE_##modname = 0;
87#define SDL_KMSDRM_SYM(rc,fn,params) SDL_DYNKMSDRMFN_##fn KMSDRM_##fn = NULL;
88#define SDL_KMSDRM_SYM_CONST(type,name) SDL_DYNKMSDRMCONST_##name KMSDRM_##name = NULL;
89#include "SDL_kmsdrmsym.h"
90
91static int kmsdrm_load_refcount = 0;
92
93void
95{
96 /* Don't actually unload if more than one module is using the libs... */
97 if (kmsdrm_load_refcount > 0) {
98 if (--kmsdrm_load_refcount == 0) {
99#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
100 int i;
101#endif
102
103 /* set all the function pointers to NULL. */
104#define SDL_KMSDRM_MODULE(modname) SDL_KMSDRM_HAVE_##modname = 0;
105#define SDL_KMSDRM_SYM(rc,fn,params) KMSDRM_##fn = NULL;
106#define SDL_KMSDRM_SYM_CONST(type,name) KMSDRM_##name = NULL;
107#include "SDL_kmsdrmsym.h"
108
109
110#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
111 for (i = 0; i < SDL_TABLESIZE(kmsdrmlibs); i++) {
112 if (kmsdrmlibs[i].lib != NULL) {
113 SDL_UnloadObject(kmsdrmlibs[i].lib);
114 kmsdrmlibs[i].lib = NULL;
115 }
116 }
117#endif
118 }
119 }
120}
121
122/* returns non-zero if all needed symbols were loaded. */
123int
125{
126 int rc = 1; /* always succeed if not using Dynamic KMSDRM stuff. */
127
128 /* deal with multiple modules needing these symbols... */
129 if (kmsdrm_load_refcount++ == 0) {
130#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC
131 int i;
132 int *thismod = NULL;
133 for (i = 0; i < SDL_TABLESIZE(kmsdrmlibs); i++) {
134 if (kmsdrmlibs[i].libname != NULL) {
135 kmsdrmlibs[i].lib = SDL_LoadObject(kmsdrmlibs[i].libname);
136 }
137 }
138
139#define SDL_KMSDRM_MODULE(modname) SDL_KMSDRM_HAVE_##modname = 1; /* default yes */
140#include "SDL_kmsdrmsym.h"
141
142#define SDL_KMSDRM_MODULE(modname) thismod = &SDL_KMSDRM_HAVE_##modname;
143#define SDL_KMSDRM_SYM(rc,fn,params) KMSDRM_##fn = (SDL_DYNKMSDRMFN_##fn) KMSDRM_GetSym(#fn,thismod);
144#define SDL_KMSDRM_SYM_CONST(type,name) KMSDRM_##name = *(SDL_DYNKMSDRMCONST_##name*) KMSDRM_GetSym(#name,thismod);
145#include "SDL_kmsdrmsym.h"
146
147 if ((SDL_KMSDRM_HAVE_LIBDRM) && (SDL_KMSDRM_HAVE_GBM)) {
148 /* all required symbols loaded. */
150 } else {
151 /* in case something got loaded... */
153 rc = 0;
154 }
155
156#else /* no dynamic KMSDRM */
157
158#define SDL_KMSDRM_MODULE(modname) SDL_KMSDRM_HAVE_##modname = 1; /* default yes */
159#define SDL_KMSDRM_SYM(rc,fn,params) KMSDRM_##fn = fn;
160#define SDL_KMSDRM_SYM_CONST(type,name) KMSDRM_##name = name;
161#include "SDL_kmsdrmsym.h"
162
163#endif
164 }
165
166 return rc;
167}
168
169#endif /* SDL_VIDEO_DRIVER_KMSDRM */
170
171/* vi: set ts=4 sw=4 expandtab: */
#define SDL_LoadObject
#define SDL_UnloadObject
#define SDL_ClearError
#define SDL_Log
int SDL_KMSDRM_LoadSymbols(void)
void SDL_KMSDRM_UnloadSymbols(void)
void * SDL_LoadFunction(void *handle, const char *name)
#define SDL_TABLESIZE(table)
Definition: SDL_stdinc.h:116
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
#define NULL
Definition: begin_code.h:167