src/loadso/dlopen/SDL_sysloadso.c
author Sam Lantinga
Fri, 15 Jan 2021 14:36:21 -0800
changeset 14739 a5b970d28bfd
parent 14640 b2b3343a310d
permissions -rw-r--r--
Fixed the screenshot button mapping on third party Bluetooth Nintendo Switch Pro controllers
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2021 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: */