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annotate src/loadso/dlopen/SDL_sysloadso.c @ 5108:d547877e355e

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Colin Leroy 2011-01-26 04:24:20 PST the pthread implementation of SDL_SemWaitTimeout() uses busy waiting, while pthread's sem_timedwait() does work. Attached are patches that make use of it
author Sam Lantinga <slouken@libsdl.org>
date Thu, 27 Jan 2011 00:34:12 -0800
parents f7b03b6838cb
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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 *
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35 SDL_LoadObject(const char *sofile)
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36 {
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37 void *handle = dlopen(sofile, RTLD_NOW);
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38 const char *loaderror = (char *) dlerror();
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39 if (handle == NULL) {
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40 SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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41 }
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42 return (handle);
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43 }
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44
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45 void *
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46 SDL_LoadFunction(void *handle, const char *name)
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47 {
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48 void *symbol = dlsym(handle, name);
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49 if (symbol == NULL) {
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50 /* append an underscore for platforms that need that. */
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51 size_t len = 1 + SDL_strlen(name) + 1;
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52 char *_name = SDL_stack_alloc(char, len);
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53 _name[0] = '_';
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54 SDL_strlcpy(&_name[1], name, len);
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55 symbol = dlsym(handle, _name);
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56 SDL_stack_free(_name);
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57 if (symbol == NULL) {
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58 SDL_SetError("Failed loading %s: %s", name,
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59 (const char *) dlerror());
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60 }
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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
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66 SDL_UnloadObject(void *handle)
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67 {
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68 if (handle != NULL) {
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69 dlclose(handle);
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70 }
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71 }
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72
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73 #endif /* SDL_LOADSO_DLOPEN */
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74
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75 /* vi: set ts=4 sw=4 expandtab: */