| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| |
| #include "../../SDL_internal.h" |
| |
| #if SDL_VIDEO_DRIVER_KMSDRM |
| |
| #define DEBUG_DYNAMIC_KMSDRM 0 |
| |
| #include "SDL_kmsdrmdyn.h" |
| |
| #if DEBUG_DYNAMIC_KMSDRM |
| #include "SDL_log.h" |
| #endif |
| |
| #ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC |
| |
| #include "SDL_name.h" |
| #include "SDL_loadso.h" |
| |
| typedef struct |
| { |
| void *lib; |
| const char *libname; |
| } kmsdrmdynlib; |
| |
| #ifndef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC |
| #define SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC NULL |
| #endif |
| #ifndef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC_GBM |
| #define SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC_GBM NULL |
| #endif |
| |
| static kmsdrmdynlib kmsdrmlibs[] = { |
| {NULL, SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC}, |
| {NULL, SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC_GBM} |
| }; |
| |
| static void * |
| KMSDRM_GetSym(const char *fnname, int *pHasModule) |
| { |
| int i; |
| void *fn = NULL; |
| for (i = 0; i < SDL_TABLESIZE(kmsdrmlibs); i++) { |
| if (kmsdrmlibs[i].lib != NULL) { |
| fn = SDL_LoadFunction(kmsdrmlibs[i].lib, fnname); |
| if (fn != NULL) |
| break; |
| } |
| } |
| |
| #if DEBUG_DYNAMIC_KMSDRM |
| if (fn != NULL) |
| SDL_Log("KMSDRM: Found '%s' in %s (%p)\n", fnname, kmsdrmlibs[i].libname, fn); |
| else |
| SDL_Log("KMSDRM: Symbol '%s' NOT FOUND!\n", fnname); |
| #endif |
| |
| if (fn == NULL) |
| *pHasModule = 0; /* kill this module. */ |
| |
| return fn; |
| } |
| |
| #endif /* SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC */ |
| |
| /* Define all the function pointers and wrappers... */ |
| #define SDL_KMSDRM_MODULE(modname) int SDL_KMSDRM_HAVE_##modname = 0; |
| #define SDL_KMSDRM_SYM(rc,fn,params) SDL_DYNKMSDRMFN_##fn KMSDRM_##fn = NULL; |
| #define SDL_KMSDRM_SYM_CONST(type,name) SDL_DYNKMSDRMCONST_##name KMSDRM_##name = NULL; |
| #include "SDL_kmsdrmsym.h" |
| |
| static int kmsdrm_load_refcount = 0; |
| |
| void |
| SDL_KMSDRM_UnloadSymbols(void) |
| { |
| /* Don't actually unload if more than one module is using the libs... */ |
| if (kmsdrm_load_refcount > 0) { |
| if (--kmsdrm_load_refcount == 0) { |
| #ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC |
| int i; |
| #endif |
| |
| /* set all the function pointers to NULL. */ |
| #define SDL_KMSDRM_MODULE(modname) SDL_KMSDRM_HAVE_##modname = 0; |
| #define SDL_KMSDRM_SYM(rc,fn,params) KMSDRM_##fn = NULL; |
| #define SDL_KMSDRM_SYM_CONST(type,name) KMSDRM_##name = NULL; |
| #include "SDL_kmsdrmsym.h" |
| |
| |
| #ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC |
| for (i = 0; i < SDL_TABLESIZE(kmsdrmlibs); i++) { |
| if (kmsdrmlibs[i].lib != NULL) { |
| SDL_UnloadObject(kmsdrmlibs[i].lib); |
| kmsdrmlibs[i].lib = NULL; |
| } |
| } |
| #endif |
| } |
| } |
| } |
| |
| /* returns non-zero if all needed symbols were loaded. */ |
| int |
| SDL_KMSDRM_LoadSymbols(void) |
| { |
| int rc = 1; /* always succeed if not using Dynamic KMSDRM stuff. */ |
| |
| /* deal with multiple modules needing these symbols... */ |
| if (kmsdrm_load_refcount++ == 0) { |
| #ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC |
| int i; |
| int *thismod = NULL; |
| for (i = 0; i < SDL_TABLESIZE(kmsdrmlibs); i++) { |
| if (kmsdrmlibs[i].libname != NULL) { |
| kmsdrmlibs[i].lib = SDL_LoadObject(kmsdrmlibs[i].libname); |
| } |
| } |
| |
| #define SDL_KMSDRM_MODULE(modname) SDL_KMSDRM_HAVE_##modname = 1; /* default yes */ |
| #include "SDL_kmsdrmsym.h" |
| |
| #define SDL_KMSDRM_MODULE(modname) thismod = &SDL_KMSDRM_HAVE_##modname; |
| #define SDL_KMSDRM_SYM(rc,fn,params) KMSDRM_##fn = (SDL_DYNKMSDRMFN_##fn) KMSDRM_GetSym(#fn,thismod); |
| #define SDL_KMSDRM_SYM_CONST(type,name) KMSDRM_##name = *(SDL_DYNKMSDRMCONST_##name*) KMSDRM_GetSym(#name,thismod); |
| #include "SDL_kmsdrmsym.h" |
| |
| if ((SDL_KMSDRM_HAVE_LIBDRM) && (SDL_KMSDRM_HAVE_GBM)) { |
| /* all required symbols loaded. */ |
| SDL_ClearError(); |
| } else { |
| /* in case something got loaded... */ |
| SDL_KMSDRM_UnloadSymbols(); |
| rc = 0; |
| } |
| |
| #else /* no dynamic KMSDRM */ |
| |
| #define SDL_KMSDRM_MODULE(modname) SDL_KMSDRM_HAVE_##modname = 1; /* default yes */ |
| #define SDL_KMSDRM_SYM(rc,fn,params) KMSDRM_##fn = fn; |
| #define SDL_KMSDRM_SYM_CONST(type,name) KMSDRM_##name = name; |
| #include "SDL_kmsdrmsym.h" |
| |
| #endif |
| } |
| |
| return rc; |
| } |
| |
| #endif /* SDL_VIDEO_DRIVER_KMSDRM */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |