SDL_waylanddyn.c (6008B)
1/* 2 Simple DirectMedia Layer 3 Copyright (C) 1997-2014 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#if SDL_VIDEO_DRIVER_WAYLAND 24 25#define DEBUG_DYNAMIC_WAYLAND 0 26 27#include "SDL_waylanddyn.h" 28 29#if DEBUG_DYNAMIC_WAYLAND 30#include "SDL_log.h" 31#endif 32 33#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC 34 35#include "SDL_name.h" 36#include "SDL_loadso.h" 37 38typedef struct 39{ 40 void *lib; 41 const char *libname; 42} waylanddynlib; 43 44#ifndef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC 45#define SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC NULL 46#endif 47#ifndef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL 48#define SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL NULL 49#endif 50#ifndef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR 51#define SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR NULL 52#endif 53#ifndef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON 54#define SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON NULL 55#endif 56 57static waylanddynlib waylandlibs[] = { 58 {NULL, SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC}, 59 {NULL, SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL}, 60 {NULL, SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR}, 61 {NULL, SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON} 62}; 63 64static void * 65WAYLAND_GetSym(const char *fnname, int *pHasModule) 66{ 67 int i; 68 void *fn = NULL; 69 for (i = 0; i < SDL_TABLESIZE(waylandlibs); i++) { 70 if (waylandlibs[i].lib != NULL) { 71 fn = SDL_LoadFunction(waylandlibs[i].lib, fnname); 72 if (fn != NULL) 73 break; 74 } 75 } 76 77#if DEBUG_DYNAMIC_WAYLAND 78 if (fn != NULL) 79 SDL_Log("WAYLAND: Found '%s' in %s (%p)\n", fnname, waylandlibs[i].libname, fn); 80 else 81 SDL_Log("WAYLAND: Symbol '%s' NOT FOUND!\n", fnname); 82#endif 83 84 if (fn == NULL) 85 *pHasModule = 0; /* kill this module. */ 86 87 return fn; 88} 89 90#endif /* SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC */ 91 92/* Define all the function pointers and wrappers... */ 93#define SDL_WAYLAND_MODULE(modname) int SDL_WAYLAND_HAVE_##modname = 0; 94#define SDL_WAYLAND_SYM(rc,fn,params) SDL_DYNWAYLANDFN_##fn WAYLAND_##fn = NULL; 95#define SDL_WAYLAND_INTERFACE(iface) const struct wl_interface *WAYLAND_##iface = NULL; 96#include "SDL_waylandsym.h" 97#undef SDL_WAYLAND_MODULE 98#undef SDL_WAYLAND_SYM 99#undef SDL_WAYLAND_INTERFACE 100 101static int wayland_load_refcount = 0; 102 103void 104SDL_WAYLAND_UnloadSymbols(void) 105{ 106 /* Don't actually unload if more than one module is using the libs... */ 107 if (wayland_load_refcount > 0) { 108 if (--wayland_load_refcount == 0) { 109#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC 110 int i; 111#endif 112 113 /* set all the function pointers to NULL. */ 114#define SDL_WAYLAND_MODULE(modname) SDL_WAYLAND_HAVE_##modname = 0; 115#define SDL_WAYLAND_SYM(rc,fn,params) WAYLAND_##fn = NULL; 116#define SDL_WAYLAND_INTERFACE(iface) WAYLAND_##iface = NULL; 117#include "SDL_waylandsym.h" 118#undef SDL_WAYLAND_MODULE 119#undef SDL_WAYLAND_SYM 120#undef SDL_WAYLAND_INTERFACE 121 122 123#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC 124 for (i = 0; i < SDL_TABLESIZE(waylandlibs); i++) { 125 if (waylandlibs[i].lib != NULL) { 126 SDL_UnloadObject(waylandlibs[i].lib); 127 waylandlibs[i].lib = NULL; 128 } 129 } 130#endif 131 } 132 } 133} 134 135/* returns non-zero if all needed symbols were loaded. */ 136int 137SDL_WAYLAND_LoadSymbols(void) 138{ 139 int rc = 1; /* always succeed if not using Dynamic WAYLAND stuff. */ 140 141 /* deal with multiple modules (dga, wayland, etc) needing these symbols... */ 142 if (wayland_load_refcount++ == 0) { 143#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC 144 int i; 145 int *thismod = NULL; 146 for (i = 0; i < SDL_TABLESIZE(waylandlibs); i++) { 147 if (waylandlibs[i].libname != NULL) { 148 waylandlibs[i].lib = SDL_LoadObject(waylandlibs[i].libname); 149 } 150 } 151 152#define SDL_WAYLAND_MODULE(modname) SDL_WAYLAND_HAVE_##modname = 1; /* default yes */ 153#define SDL_WAYLAND_SYM(rc,fn,params) 154#define SDL_WAYLAND_INTERFACE(iface) 155#include "SDL_waylandsym.h" 156#undef SDL_WAYLAND_MODULE 157#undef SDL_WAYLAND_SYM 158#undef SDL_WAYLAND_INTERFACE 159 160#define SDL_WAYLAND_MODULE(modname) thismod = &SDL_WAYLAND_HAVE_##modname; 161#define SDL_WAYLAND_SYM(rc,fn,params) WAYLAND_##fn = (SDL_DYNWAYLANDFN_##fn) WAYLAND_GetSym(#fn,thismod); 162#define SDL_WAYLAND_INTERFACE(iface) WAYLAND_##iface = (struct wl_interface *) WAYLAND_GetSym(#iface,thismod); 163#include "SDL_waylandsym.h" 164#undef SDL_WAYLAND_MODULE 165#undef SDL_WAYLAND_SYM 166#undef SDL_WAYLAND_INTERFACE 167 168 if (SDL_WAYLAND_HAVE_WAYLAND_CLIENT) { 169 /* all required symbols loaded. */ 170 SDL_ClearError(); 171 } else { 172 /* in case something got loaded... */ 173 SDL_WAYLAND_UnloadSymbols(); 174 rc = 0; 175 } 176 177#else /* no dynamic WAYLAND */ 178 179#define SDL_WAYLAND_MODULE(modname) SDL_WAYLAND_HAVE_##modname = 1; /* default yes */ 180#define SDL_WAYLAND_SYM(rc,fn,params) WAYLAND_##fn = fn; 181#define SDL_WAYLAND_INTERFACE(iface) WAYLAND_##iface = &iface; 182#include "SDL_waylandsym.h" 183#undef SDL_WAYLAND_MODULE 184#undef SDL_WAYLAND_SYM 185#undef SDL_WAYLAND_INTERFACE 186 187#endif 188 } 189 190 return rc; 191} 192 193#endif /* SDL_VIDEO_DRIVER_WAYLAND */ 194 195/* vi: set ts=4 sw=4 expandtab: */