Mercurial > sdl-ios-xcode

annotate src/loadso/dlopen/SDL_sysloadso.c @ 4001:6831b8723a85 SDL-1.2

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Don't initialize the audio buffer passed to the application's audio callback, since they are expected to entirely fill it with data or silence. For legacy apps that might expect the buffer to already have silence and thus may not fill the buffer in the callback, there's an environment variable to expose the old behaviour. Fixes Bugzilla #416.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 05 Jul 2007 02:24:36 +0000
parents 6e41f5d80198
children a1b03ba2fcd0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 */