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annotate src/loadso/dlopen/SDL_sysloadso.c @ 4207:a673f44949d6 SDL-1.2

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Fixed bug #562 this patch by Diego Pettenò <flameeyes@gentoo.org> for SDL-1.2: The attached patch applies over latest ~arch SDL version, and allows to use the xinerama support to launch an application full screened on the head "0". The SDL_VIDEO_FULLSCREEN_HEAD environment variable sets the head on which the full screen will be displayed, but if you set it to 0, the code simply ignores it as unset. My patch changes the unset value to -1, so that the 0 value can be used correctly. Without this, trying to get fullscreen on head 0 would get the same result than not having xinerama enabled at all. http://sources.gentoo.org/media-libs/libsdl/files/libsdl-1.2.11-xinerama-head-0.patch SDL-1.3 doesnt seem to have any code like this, but it's still good for SDL-1.2
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 07:20:51 +0000
parents a1b03ba2fcd0
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rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifdef SDL_LOADSO_DLOPEN
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25
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26 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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27 /* System dependent library loading routines */
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28
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29 #include <stdio.h>
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30 #include <dlfcn.h>
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31
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32 #include "SDL_loadso.h"
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33
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34 void *SDL_LoadObject(const char *sofile)
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35 {
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36 void *handle = dlopen(sofile, RTLD_NOW);
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37 const char *loaderror = (char *)dlerror();
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38 if ( handle == NULL ) {
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39 SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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40 }
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41 return(handle);
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42 }
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43
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44 void *SDL_LoadFunction(void *handle, const char *name)
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45 {
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46 void *symbol = dlsym(handle, name);
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47 if ( symbol == NULL ) {
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48 /* append an underscore for platforms that need that. */
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49 size_t len = 1+SDL_strlen(name)+1;
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50 char *_name = SDL_stack_alloc(char, len);
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51 _name[0] = '_';
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52 SDL_strlcpy(&_name[1], name, len);
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53 symbol = dlsym(handle, _name);
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54 SDL_stack_free(_name);
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55 if ( symbol == NULL ) {
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56 SDL_SetError("Failed loading %s: %s", name, (const char *)dlerror());
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57 }
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58 }
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59 return(symbol);
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60 }
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61
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62 void SDL_UnloadObject(void *handle)
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63 {
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64 if ( handle != NULL ) {
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65 dlclose(handle);
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66 }
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67 }
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68
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69 #endif /* SDL_LOADSO_DLOPEN */