SDL_x11dyn.c (6561B)
1/* 2 Simple DirectMedia Layer 3 Copyright (C) 1997-2014 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#include "../../SDL_internal.h" 22 23#if SDL_VIDEO_DRIVER_X11 24 25#define DEBUG_DYNAMIC_X11 0 26 27#include "SDL_x11dyn.h" 28 29#if DEBUG_DYNAMIC_X11 30#include <stdio.h> 31#endif 32 33#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC 34 35#include "SDL_name.h" 36#include "SDL_loadso.h" 37 38typedef struct 39{ 40 void *lib; 41 const char *libname; 42} x11dynlib; 43 44#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC 45#define SDL_VIDEO_DRIVER_X11_DYNAMIC NULL 46#endif 47#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT 48#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT NULL 49#endif 50#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR 51#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR NULL 52#endif 53#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA 54#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA NULL 55#endif 56#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 57#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 NULL 58#endif 59#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR 60#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR NULL 61#endif 62#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS 63#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS NULL 64#endif 65#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE 66#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE NULL 67#endif 68 69static x11dynlib x11libs[] = { 70 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC}, 71 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT}, 72 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR}, 73 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XINERAMA}, 74 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2}, 75 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR}, 76 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS}, 77 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XVIDMODE} 78}; 79 80static void * 81X11_GetSym(const char *fnname, int *pHasModule) 82{ 83 int i; 84 void *fn = NULL; 85 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) { 86 if (x11libs[i].lib != NULL) { 87 fn = SDL_LoadFunction(x11libs[i].lib, fnname); 88 if (fn != NULL) 89 break; 90 } 91 } 92 93#if DEBUG_DYNAMIC_X11 94 if (fn != NULL) 95 printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname, fn); 96 else 97 printf("X11: Symbol '%s' NOT FOUND!\n", fnname); 98#endif 99 100 if (fn == NULL) 101 *pHasModule = 0; /* kill this module. */ 102 103 return fn; 104} 105 106#endif /* SDL_VIDEO_DRIVER_X11_DYNAMIC */ 107 108/* Define all the function pointers and wrappers... */ 109#define SDL_X11_MODULE(modname) 110#define SDL_X11_SYM(rc,fn,params,args,ret) SDL_DYNX11FN_##fn X11_##fn = NULL; 111#include "SDL_x11sym.h" 112#undef SDL_X11_MODULE 113#undef SDL_X11_SYM 114 115/* Annoying varargs entry point... */ 116#ifdef X_HAVE_UTF8_STRING 117SDL_DYNX11FN_XCreateIC X11_XCreateIC = NULL; 118SDL_DYNX11FN_XGetICValues X11_XGetICValues = NULL; 119#endif 120 121/* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */ 122#define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 0; 123#define SDL_X11_SYM(rc,fn,params,args,ret) 124#include "SDL_x11sym.h" 125#undef SDL_X11_MODULE 126#undef SDL_X11_SYM 127 128static int x11_load_refcount = 0; 129 130void 131SDL_X11_UnloadSymbols(void) 132{ 133 /* Don't actually unload if more than one module is using the libs... */ 134 if (x11_load_refcount > 0) { 135 if (--x11_load_refcount == 0) { 136 int i; 137 138 /* set all the function pointers to NULL. */ 139#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 0; 140#define SDL_X11_SYM(rc,fn,params,args,ret) X11_##fn = NULL; 141#include "SDL_x11sym.h" 142#undef SDL_X11_MODULE 143#undef SDL_X11_SYM 144 145#ifdef X_HAVE_UTF8_STRING 146 X11_XCreateIC = NULL; 147 X11_XGetICValues = NULL; 148#endif 149 150#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC 151 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) { 152 if (x11libs[i].lib != NULL) { 153 SDL_UnloadObject(x11libs[i].lib); 154 x11libs[i].lib = NULL; 155 } 156 } 157#endif 158 } 159 } 160} 161 162/* returns non-zero if all needed symbols were loaded. */ 163int 164SDL_X11_LoadSymbols(void) 165{ 166 int rc = 1; /* always succeed if not using Dynamic X11 stuff. */ 167 168 /* deal with multiple modules (dga, x11, etc) needing these symbols... */ 169 if (x11_load_refcount++ == 0) { 170#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC 171 int i; 172 int *thismod = NULL; 173 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) { 174 if (x11libs[i].libname != NULL) { 175 x11libs[i].lib = SDL_LoadObject(x11libs[i].libname); 176 } 177 } 178 179#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1; /* default yes */ 180#define SDL_X11_SYM(a,fn,x,y,z) 181#include "SDL_x11sym.h" 182#undef SDL_X11_MODULE 183#undef SDL_X11_SYM 184 185#define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname; 186#define SDL_X11_SYM(a,fn,x,y,z) X11_##fn = (SDL_DYNX11FN_##fn) X11_GetSym(#fn,thismod); 187#include "SDL_x11sym.h" 188#undef SDL_X11_MODULE 189#undef SDL_X11_SYM 190 191#ifdef X_HAVE_UTF8_STRING 192 X11_XCreateIC = (SDL_DYNX11FN_XCreateIC) 193 X11_GetSym("XCreateIC", &SDL_X11_HAVE_UTF8); 194 X11_XGetICValues = (SDL_DYNX11FN_XGetICValues) 195 X11_GetSym("XGetICValues", &SDL_X11_HAVE_UTF8); 196#endif 197 198 if (SDL_X11_HAVE_BASEXLIB) { 199 /* all required symbols loaded. */ 200 SDL_ClearError(); 201 } else { 202 /* in case something got loaded... */ 203 SDL_X11_UnloadSymbols(); 204 rc = 0; 205 } 206 207#else /* no dynamic X11 */ 208 209#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1; /* default yes */ 210#define SDL_X11_SYM(a,fn,x,y,z) X11_##fn = fn; 211#include "SDL_x11sym.h" 212#undef SDL_X11_MODULE 213#undef SDL_X11_SYM 214 215#ifdef X_HAVE_UTF8_STRING 216 X11_XCreateIC = XCreateIC; 217 X11_XGetICValues = XGetICValues; 218#endif 219#endif 220 } 221 222 return rc; 223} 224 225#endif /* SDL_VIDEO_DRIVER_X11 */ 226 227/* vi: set ts=4 sw=4 expandtab: */