Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11dyn.c @ 1245:fe7d081a4955
Patched to compile with debugging enabled.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Fri, 13 Jan 2006 01:30:21 +0000 |
parents | ed252764287a |
children | 19418e4422cb |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2004 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 |
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23 #if 0 |
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24 #define DEBUG_DYNAMIC_X11 1 |
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25 #endif |
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26 |
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27 #define __SDL_NO_REDEFINE_X11_HEADER_SYMS 1 |
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28 #include "SDL_x11dyn.h" |
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29 |
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30 #ifdef DEBUG_DYNAMIC_X11 |
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31 #include <stdio.h> |
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32 #endif |
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33 |
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34 #ifdef X11_DYNAMIC |
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35 #include <dlfcn.h> |
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36 #include "SDL_name.h" |
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37 #include "SDL_loadso.h" |
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38 static const char *x11_library = X11_DYNAMIC; |
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39 static void *x11_handle = NULL; |
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40 static const char *x11ext_library = X11EXT_DYNAMIC; |
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41 static void *x11ext_handle = NULL; |
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42 |
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43 static void *X11_GetSym(int required, const char *fnname, int *rc) |
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44 { |
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45 void *fn = NULL; |
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46 if (*rc) { /* haven't already failed on a previous lookup? */ |
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47 fn = SDL_LoadFunction(x11_handle, fnname); |
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48 #if DEBUG_DYNAMIC_X11 |
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49 if (fn != NULL) |
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50 printf("X11: Found '%s' in libX11 (%p)\n", fnname, fn); |
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51 #endif |
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52 |
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53 if (fn == NULL) { /* not found? Check libX11ext ... */ |
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54 fn = SDL_LoadFunction(x11ext_handle, fnname); |
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55 #if DEBUG_DYNAMIC_X11 |
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56 if (fn != NULL) |
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57 printf("X11: Found '%s' in libXext (%p)\n", fnname, fn); |
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58 else |
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59 printf("X11: Symbol '%s' NOT FOUND!%s\n", fnname, |
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60 required ? "" : " (...but not required!)"); |
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61 #endif |
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62 } |
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63 *rc = ((fn != NULL) || (!required)); |
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64 } |
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65 |
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66 return fn; |
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67 } |
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68 #endif /* defined X11_DYNAMIC */ |
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69 |
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70 /* Define all the function pointers... */ |
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71 #define SDL_X11_SYM(req,ret,fn,params) ret (*p##fn) params = NULL; |
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72 #include "SDL_x11sym.h" |
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73 #undef SDL_X11_SYM |
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74 |
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75 static int x11_load_refcount = 0; |
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76 |
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77 void SDL_X11_UnloadSymbols(void) |
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78 { |
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79 /* Don't actually unload if more than one module is using the libs... */ |
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80 if (x11_load_refcount > 0) { |
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81 if (--x11_load_refcount == 0) { |
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82 /* set all the function pointers to NULL. */ |
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83 #define SDL_X11_SYM(req,ret,fn,params) p##fn = NULL; |
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84 #include "SDL_x11sym.h" |
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85 #undef SDL_X11_SYM |
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86 |
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87 #ifdef X11_DYNAMIC |
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88 if (x11_handle != NULL) { |
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89 SDL_UnloadObject(x11_handle); |
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90 x11_handle = NULL; |
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91 } |
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92 if (x11ext_handle != NULL) { |
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93 SDL_UnloadObject(x11ext_handle); |
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94 x11ext_handle = NULL; |
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95 } |
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96 #endif |
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97 } |
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98 } |
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99 } |
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100 |
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101 /* returns non-zero if all needed symbols were loaded. */ |
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102 int SDL_X11_LoadSymbols(void) |
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103 { |
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104 int rc = 1; |
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105 |
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106 /* deal with multiple modules (dga, x11, etc) needing these symbols... */ |
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107 if (x11_load_refcount++ == 0) { |
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108 #ifdef X11_DYNAMIC |
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109 x11_handle = SDL_LoadObject(x11_library); |
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110 x11ext_handle = SDL_LoadObject(x11ext_library); |
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111 rc = ((x11_handle != NULL) && (x11ext_handle != NULL)); |
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112 #define SDL_X11_SYM(req,r,fn,arg) p##fn = X11_GetSym(req,#fn, &rc); |
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113 #include "SDL_x11sym.h" |
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114 #undef SDL_X11_SYM |
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115 |
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116 if (!rc) |
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117 SDL_X11_UnloadSymbols(); /* in case one of these loaded... */ |
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118 |
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119 #else |
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120 #define SDL_X11_SYM(req,r,fn,arg) p##fn = fn; |
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121 #include "SDL_x11sym.h" |
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122 #undef SDL_X11_SYM |
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123 #endif |
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124 } |
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125 |
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126 return rc; |
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127 } |
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128 |
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129 /* end of SDL_x11dyn.c ... */ |
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130 |