sdl

FORK: Simple Directmedia Layer
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SDL_sysloadso.c (2556B)

      1 /*
      2   Simple DirectMedia Layer
      3   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
      4 
      5   This software is provided 'as-is', without any express or implied
      6   warranty.  In no event will the authors be held liable for any damages
      7   arising from the use of this software.
      8 
      9   Permission is granted to anyone to use this software for any purpose,
     10   including commercial applications, and to alter it and redistribute it
     11   freely, subject to the following restrictions:
     12 
     13   1. The origin of this software must not be misrepresented; you must not
     14      claim that you wrote the original software. If you use this software
     15      in a product, an acknowledgment in the product documentation would be
     16      appreciated but is not required.
     17   2. Altered source versions must be plainly marked as such, and must not be
     18      misrepresented as being the original software.
     19   3. This notice may not be removed or altered from any source distribution.
     20 */
     21 #include "../../SDL_internal.h"
     22 
     23 #ifdef SDL_LOADSO_DLOPEN
     24 
     25 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
     26 /* System dependent library loading routines                           */
     27 
     28 #include <stdio.h>
     29 #include <dlfcn.h>
     30 
     31 #include "SDL_loadso.h"
     32 
     33 #if SDL_VIDEO_DRIVER_UIKIT
     34 #include "../../video/uikit/SDL_uikitvideo.h"
     35 #endif
     36 
     37 void *
     38 SDL_LoadObject(const char *sofile)
     39 {
     40     void *handle;
     41     const char *loaderror;
     42 
     43 #if SDL_VIDEO_DRIVER_UIKIT
     44     if (!UIKit_IsSystemVersionAtLeast(8.0)) {
     45         SDL_SetError("SDL_LoadObject requires iOS 8+");
     46         return NULL;
     47     }
     48 #endif
     49 
     50     handle = dlopen(sofile, RTLD_NOW|RTLD_LOCAL);
     51     loaderror = dlerror();
     52     if (handle == NULL) {
     53         SDL_SetError("Failed loading %s: %s", sofile, loaderror);
     54     }
     55     return (handle);
     56 }
     57 
     58 void *
     59 SDL_LoadFunction(void *handle, const char *name)
     60 {
     61     void *symbol = dlsym(handle, name);
     62     if (symbol == NULL) {
     63         /* append an underscore for platforms that need that. */
     64         SDL_bool isstack;
     65         size_t len = 1 + SDL_strlen(name) + 1;
     66         char *_name = SDL_small_alloc(char, len, &isstack);
     67         _name[0] = '_';
     68         SDL_strlcpy(&_name[1], name, len);
     69         symbol = dlsym(handle, _name);
     70         SDL_small_free(_name, isstack);
     71         if (symbol == NULL) {
     72             SDL_SetError("Failed loading %s: %s", name,
     73                          (const char *) dlerror());
     74         }
     75     }
     76     return (symbol);
     77 }
     78 
     79 void
     80 SDL_UnloadObject(void *handle)
     81 {
     82     if (handle != NULL) {
     83         dlclose(handle);
     84     }
     85 }
     86 
     87 #endif /* SDL_LOADSO_DLOPEN */
     88 
     89 /* vi: set ts=4 sw=4 expandtab: */