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annotate src/loadso/dlopen/SDL_sysloadso.c @ 4024:000a99b4be87 SDL-1.2

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Reverted patch in revision #3139, since it changes behaviour, which isn't good at this stage of 1.2.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 09 Jul 2007 00:25:31 +0000
parents 6e41f5d80198
children a1b03ba2fcd0
rev   line source
1361
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 */