src/video/mir/SDL_mirdyn.c
author Ryan C. Gordon <icculus@icculus.org>
Mon, 03 Feb 2014 14:47:48 -0500
changeset 8163 52f8629bdef2
parent 8159 427e8fdf6f69
child 9619 b94b6d0bff0f
permissions -rw-r--r--
Removed -force_cpusubtype_ALL cflag from Mac builds.

This was for PowerPC G3 (!) compatibility, and Clang doesn't even recognize
the flag anymore.
     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_MIR
    24 
    25 #define DEBUG_DYNAMIC_MIR 0
    26 
    27 #include "SDL_mirdyn.h"
    28 
    29 #if DEBUG_DYNAMIC_MIR
    30 #include "SDL_log.h"
    31 #endif
    32 
    33 #ifdef SDL_VIDEO_DRIVER_MIR_DYNAMIC
    34 
    35 #include "SDL_name.h"
    36 #include "SDL_loadso.h"
    37 
    38 typedef struct
    39 {
    40     void *lib;
    41     const char *libname;
    42 } mirdynlib;
    43 
    44 #ifndef SDL_VIDEO_DRIVER_MIR_DYNAMIC
    45 #define SDL_VIDEO_DRIVER_MIR_DYNAMIC NULL
    46 #endif
    47 #ifndef SDL_VIDEO_DRIVER_MIR_DYNAMIC_XKBCOMMON
    48 #define SDL_VIDEO_DRIVER_MIR_DYNAMIC_XKBCOMMON NULL
    49 #endif
    50 
    51 static mirdynlib mirlibs[] = {
    52     {NULL, SDL_VIDEO_DRIVER_MIR_DYNAMIC},
    53     {NULL, SDL_VIDEO_DRIVER_MIR_DYNAMIC_XKBCOMMON}
    54 };
    55 
    56 static void *
    57 MIR_GetSym(const char *fnname, int *pHasModule)
    58 {
    59     int i;
    60     void *fn = NULL;
    61     for (i = 0; i < SDL_TABLESIZE(mirlibs); i++) {
    62         if (mirlibs[i].lib != NULL) {
    63             fn = SDL_LoadFunction(mirlibs[i].lib, fnname);
    64             if (fn != NULL)
    65                 break;
    66         }
    67     }
    68 
    69 #if DEBUG_DYNAMIC_MIR
    70     if (fn != NULL)
    71         SDL_Log("MIR: Found '%s' in %s (%p)\n", fnname, mirlibs[i].libname, fn);
    72     else
    73         SDL_Log("MIR: Symbol '%s' NOT FOUND!\n", fnname);
    74 #endif
    75 
    76     if (fn == NULL)
    77         *pHasModule = 0;  /* kill this module. */
    78 
    79     return fn;
    80 }
    81 
    82 #endif /* SDL_VIDEO_DRIVER_MIR_DYNAMIC */
    83 
    84 /* Define all the function pointers and wrappers... */
    85 #define SDL_MIR_MODULE(modname) int SDL_MIR_HAVE_##modname = 0;
    86 #define SDL_MIR_SYM(rc,fn,params) SDL_DYNMIRFN_##fn MIR_##fn = NULL;
    87 #include "SDL_mirsym.h"
    88 #undef SDL_MIR_MODULE
    89 #undef SDL_MIR_SYM
    90 
    91 static int mir_load_refcount = 0;
    92 
    93 void
    94 SDL_MIR_UnloadSymbols(void)
    95 {
    96     /* Don't actually unload if more than one module is using the libs... */
    97     if (mir_load_refcount > 0) {
    98         if (--mir_load_refcount == 0) {
    99 #ifdef SDL_VIDEO_DRIVER_MIR_DYNAMIC            
   100             int i;
   101 #endif
   102             
   103             /* set all the function pointers to NULL. */
   104 #define SDL_MIR_MODULE(modname) SDL_MIR_HAVE_##modname = 0;
   105 #define SDL_MIR_SYM(rc,fn,params) MIR_##fn = NULL;
   106 #include "SDL_mirsym.h"
   107 #undef SDL_MIR_MODULE
   108 #undef SDL_MIR_SYM
   109 
   110 
   111 #ifdef SDL_VIDEO_DRIVER_MIR_DYNAMIC
   112             for (i = 0; i < SDL_TABLESIZE(mirlibs); i++) {
   113                 if (mirlibs[i].lib != NULL) {
   114                     SDL_UnloadObject(mirlibs[i].lib);
   115                     mirlibs[i].lib = NULL;
   116                 }
   117             }
   118 #endif
   119         }
   120     }
   121 }
   122 
   123 /* returns non-zero if all needed symbols were loaded. */
   124 int
   125 SDL_MIR_LoadSymbols(void)
   126 {
   127     int rc = 1;                 /* always succeed if not using Dynamic MIR stuff. */
   128 
   129     /* deal with multiple modules (dga, wayland, mir, etc) needing these symbols... */
   130     if (mir_load_refcount++ == 0) {
   131 #ifdef SDL_VIDEO_DRIVER_MIR_DYNAMIC
   132         int i;
   133         int *thismod = NULL;
   134         for (i = 0; i < SDL_TABLESIZE(mirlibs); i++) {
   135             if (mirlibs[i].libname != NULL) {
   136                 mirlibs[i].lib = SDL_LoadObject(mirlibs[i].libname);
   137             }
   138         }
   139 
   140 #define SDL_MIR_MODULE(modname) SDL_MIR_HAVE_##modname = 1; /* default yes */
   141 #define SDL_MIR_SYM(rc,fn,params)
   142 #include "SDL_mirsym.h"
   143 #undef SDL_MIR_MODULE
   144 #undef SDL_MIR_SYM
   145 
   146 #define SDL_MIR_MODULE(modname) thismod = &SDL_MIR_HAVE_##modname;
   147 #define SDL_MIR_SYM(rc,fn,params) MIR_##fn = (SDL_DYNMIRFN_##fn) MIR_GetSym(#fn,thismod);
   148 #include "SDL_mirsym.h"
   149 #undef SDL_MIR_MODULE
   150 #undef SDL_MIR_SYM
   151 
   152         if ((SDL_MIR_HAVE_MIR_CLIENT) && (SDL_MIR_HAVE_XKBCOMMON)) {
   153             /* all required symbols loaded. */
   154             SDL_ClearError();
   155         } else {
   156             /* in case something got loaded... */
   157             SDL_MIR_UnloadSymbols();
   158             rc = 0;
   159         }
   160 
   161 #else  /* no dynamic MIR */
   162 
   163 #define SDL_MIR_MODULE(modname) SDL_MIR_HAVE_##modname = 1; /* default yes */
   164 #define SDL_MIR_SYM(rc,fn,params) MIR_##fn = fn;
   165 #include "SDL_mirsym.h"
   166 #undef SDL_MIR_MODULE
   167 #undef SDL_MIR_SYM
   168 
   169 #endif
   170     }
   171 
   172     return rc;
   173 }
   174 
   175 #endif /* SDL_VIDEO_DRIVER_MIR */
   176 
   177 /* vi: set ts=4 sw=4 expandtab: */