From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Sat, 27 Dec 2025 12:03:39 -0800 Subject: Initial commit --- contrib/SDL-3.2.8/src/video/kmsdrm/SDL_kmsdrmdyn.c | 161 +++++++++++++++++++++ 1 file changed, 161 insertions(+) create mode 100644 contrib/SDL-3.2.8/src/video/kmsdrm/SDL_kmsdrmdyn.c (limited to 'contrib/SDL-3.2.8/src/video/kmsdrm/SDL_kmsdrmdyn.c') diff --git a/contrib/SDL-3.2.8/src/video/kmsdrm/SDL_kmsdrmdyn.c b/contrib/SDL-3.2.8/src/video/kmsdrm/SDL_kmsdrmdyn.c new file mode 100644 index 0000000..a532cea --- /dev/null +++ b/contrib/SDL-3.2.8/src/video/kmsdrm/SDL_kmsdrmdyn.c @@ -0,0 +1,161 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2025 Sam Lantinga + + 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" + +#ifdef SDL_VIDEO_DRIVER_KMSDRM + +#define DEBUG_DYNAMIC_KMSDRM 0 + +#include "SDL_kmsdrmdyn.h" + +#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC + +typedef struct +{ + void *lib; + const char *libname; +} kmsdrmdynlib; + +#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_GBM }, + { NULL, SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC } +}; + +static void *KMSDRM_GetSym(const char *fnname, int *pHasModule, bool required) +{ + int i; + void *fn = NULL; + for (i = 0; i < SDL_arraysize(kmsdrmlibs); i++) { + if (kmsdrmlibs[i].lib) { + fn = SDL_LoadFunction(kmsdrmlibs[i].lib, fnname); + if (fn) { + break; + } + } + } + +#if DEBUG_DYNAMIC_KMSDRM + if (fn) + SDL_Log("KMSDRM: Found '%s' in %s (%p)", fnname, kmsdrmlibs[i].libname, fn); + else + SDL_Log("KMSDRM: Symbol '%s' NOT FOUND!", fnname); +#endif + + if (!fn && required) { + *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; +#define SDL_KMSDRM_SYM_OPT(rc, fn, params) SDL_DYNKMSDRMFN_##fn KMSDRM_##fn = 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; +#define SDL_KMSDRM_SYM_OPT(rc, fn, params) KMSDRM_##fn = NULL; +#include "SDL_kmsdrmsym.h" + +#ifdef SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC + for (i = 0; i < SDL_arraysize(kmsdrmlibs); i++) { + if (kmsdrmlibs[i].lib) { + SDL_UnloadObject(kmsdrmlibs[i].lib); + kmsdrmlibs[i].lib = NULL; + } + } +#endif + } + } +} + +// returns non-zero if all needed symbols were loaded. +bool SDL_KMSDRM_LoadSymbols(void) +{ + bool result = true; // 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_arraysize(kmsdrmlibs); i++) { + if (kmsdrmlibs[i].libname) { + 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, true); +#define SDL_KMSDRM_SYM_CONST(type, name) KMSDRM_##name = *(SDL_DYNKMSDRMCONST_##name *)KMSDRM_GetSym(#name, thismod, true); +#define SDL_KMSDRM_SYM_OPT(rc, fn, params) KMSDRM_##fn = (SDL_DYNKMSDRMFN_##fn)KMSDRM_GetSym(#fn, thismod, false); +#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(); + result = false; + } + +#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; +#define SDL_KMSDRM_SYM_OPT(rc, fn, params) KMSDRM_##fn = fn; +#include "SDL_kmsdrmsym.h" + +#endif + } + + return result; +} + +#endif // SDL_VIDEO_DRIVER_KMSDRM -- cgit v1.2.3