SDL  2.0
SDL_sysloadso.c
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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
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: */
SDL_strlcpy
#define SDL_strlcpy
Definition: SDL_dynapi_overrides.h:394
SDL_small_free
#define SDL_small_free(ptr, isstack)
Definition: SDL_internal.h:40
NULL
#define NULL
Definition: begin_code.h:167
handle
EGLImageKHR EGLint EGLint * handle
Definition: eglext.h:937
SDL_UnloadObject
#define SDL_UnloadObject
Definition: SDL_dynapi_overrides.h:234
SDL_small_alloc
#define SDL_small_alloc(type, count, pisstack)
Definition: SDL_internal.h:39
SDL_LoadObject
#define SDL_LoadObject
Definition: SDL_dynapi_overrides.h:232
len
GLenum GLsizei len
Definition: SDL_opengl_glext.h:2929
name
GLuint const GLchar * name
Definition: SDL_opengl_glext.h:663
UIKit_IsSystemVersionAtLeast
SDL_bool UIKit_IsSystemVersionAtLeast(double version)
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
SDL_LoadFunction
void * SDL_LoadFunction(void *handle, const char *name)
SDL_strlen
#define SDL_strlen
Definition: SDL_dynapi_overrides.h:393
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:162
SDL_loadso.h