diff options
Diffstat (limited to 'source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmdyn.c')
| -rw-r--r-- | source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmdyn.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmdyn.c b/source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmdyn.c new file mode 100644 index 0000000..c79f372 --- /dev/null +++ b/source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmdyn.c @@ -0,0 +1,171 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 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: */ |