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      1 /*
      2     SDL - Simple DirectMedia Layer
      3     Copyright (C) 1997-2006 Sam Lantinga
      4 
      5     This library is free software; you can redistribute it and/or
      6     modify it under the terms of the GNU Lesser General Public
      7     License as published by the Free Software Foundation; either
      8     version 2.1 of the License, or (at your option) any later version.
      9 
     10     This library is distributed in the hope that it will be useful,
     11     but WITHOUT ANY WARRANTY; without even the implied warranty of
     12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13     Lesser General Public License for more details.
     14 
     15     You should have received a copy of the GNU Lesser General Public
     16     License along with this library; if not, write to the Free Software
     17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
     18 
     19     Sam Lantinga
     20     slouken (at) libsdl.org
     21 */
     22 #include "SDL_config.h"
     23 
     24 #ifdef SDL_LOADSO_DLOPEN
     25 
     26 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
     27 /* System dependent library loading routines                           */
     28 
     29 #include <stdio.h>
     30 #include <dlfcn.h>
     31 
     32 #include "SDL_loadso.h"
     33 
     34 void *SDL_LoadObject(const char *sofile)
     35 {
     36 	void *handle = dlopen(sofile, RTLD_NOW);
     37 	const char *loaderror = (char *)dlerror();
     38 	if ( handle == NULL ) {
     39 		SDL_SetError("Failed loading %s: %s", sofile, loaderror);
     40 	}
     41 	return(handle);
     42 }
     43 
     44 void *SDL_LoadFunction(void *handle, const char *name)
     45 {
     46 	void *symbol = dlsym(handle, name);
     47 	if ( symbol == NULL ) {
     48 		/* append an underscore for platforms that need that. */
     49 		size_t len = 1+SDL_strlen(name)+1;
     50 		char *_name = SDL_stack_alloc(char, len);
     51 		_name[0] = '_';
     52 		SDL_strlcpy(&_name[1], name, len);
     53 		symbol = dlsym(handle, _name);
     54 		SDL_stack_free(_name);
     55 		if ( symbol == NULL ) {
     56 			SDL_SetError("Failed loading %s: %s", name, (const char *)dlerror());
     57 		}
     58 	}
     59 	return(symbol);
     60 }
     61 
     62 void SDL_UnloadObject(void *handle)
     63 {
     64 	if ( handle != NULL ) {
     65 		dlclose(handle);
     66 	}
     67 }
     68 
     69 #endif /* SDL_LOADSO_DLOPEN */
     70