Mercurial > sdl-ios-xcode

annotate src/loadso/os2/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 92947e3a18db
children 782fd950bd46 c121d94672cb 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_OS2
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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 #define INCL_DOSERRORS
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31 #define INCL_DOSMODULEMGR
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32 #include <os2.h>
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33
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34 #include "SDL_loadso.h"
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35
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36 void *SDL_LoadObject(const char *sofile)
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37 {
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38 HMODULE handle = NULL;
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39 char buf[512];
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40 APIRET ulrc = DosLoadModule(buf, sizeof (buf), (char *) sofile, &handle);
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41
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42 /* Generate an error message if all loads failed */
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43 if ((ulrc != NO_ERROR) || (handle == NULL))
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44 SDL_SetError("Failed loading %s: %s", sofile, buf);
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45
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46 return((void *) handle);
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47 }
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48
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49 void *SDL_LoadFunction(void *handle, const char *name)
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50 {
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51 const char *loaderror = "Unknown error";
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52 void *symbol = NULL;
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53 APIRET ulrc = DosQueryProcAddr((HMODULE)handle, 0, (char *)name, &symbol);
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54 if (ulrc == ERROR_INVALID_HANDLE)
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55 loaderror = "Invalid module handle";
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56 else if (ulrc == ERROR_INVALID_NAME)
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57 loaderror = "Symbol not found";
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58
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59 if (symbol == NULL)
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60 SDL_SetError("Failed loading %s: %s", name, loaderror);
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61
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62 return(symbol);
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63 }
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64
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65 void SDL_UnloadObject(void *handle)
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66 {
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67 if ( handle != NULL )
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68 DosFreeModule((HMODULE) handle);
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69 }
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70
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71 #endif /* SDL_LOADSO_OS2 */