reactos/dll/opengl/mesa/src/mesa/main/dlopen.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  20  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24
  25 /**
  26  * Wrapper functions for dlopen(), dlsym(), dlclose().
  27  * Note that the #ifdef tests for various environments should be expanded.
  28  */
  29
  30
  31 #include "compiler.h"
  32 #include "dlopen.h"
  33
  34 #if defined(_GNU_SOURCE) && !defined(__MINGW32__) && !defined(__blrts)
  35 #include <dlfcn.h>
  36 #endif
  37 #if defined(_WIN32)
  38 //#include <windows.h>
  39 #include <windef.h>
  40 #include <winbase.h>
  41 #endif
  42
  43
  44 /**
  45  * Wrapper for dlopen().
  46  * Note that 'flags' isn't used at this time.
  47  */
  48 void *
  49 _mesa_dlopen(const char *libname, int flags)
  50 {
  51 #if defined(__blrts)
  52    return NULL;
  53 #elif defined(_GNU_SOURCE)
  54    flags = RTLD_LAZY | RTLD_GLOBAL; /* Overriding flags at this time */
  55    return dlopen(libname, flags);
  56 #elif defined(__MINGW32__)
  57    return LoadLibraryA(libname);
  58 #else
  59    return NULL;
  60 #endif
  61 }
  62
  63
  64 /**
  65  * Wrapper for dlsym() that does a cast to a generic function type,
  66  * rather than a void *.  This reduces the number of warnings that are
  67  * generated.
  68  */
  69 GenericFunc
  70 _mesa_dlsym(void *handle, const char *fname)
  71 {
  72    union {
  73       void *v;
  74       GenericFunc f;
  75    } u;
  76 #if defined(__blrts)
  77    u.v = NULL;
  78 #elif defined(__DJGPP__)
  79    /* need '_' prefix on symbol names */
  80    char fname2[1000];
  81    fname2[0] = '_';
  82    strncpy(fname2 + 1, fname, 998);
  83    fname2[999] = 0;
  84    u.v = dlsym(handle, fname2);
  85 #elif defined(_GNU_SOURCE)
  86    u.v = dlsym(handle, fname);
  87 #elif defined(__MINGW32__)
  88    u.v = (void *) GetProcAddress(handle, fname);
  89 #else
  90    u.v = NULL;
  91 #endif
  92    return u.f;
  93 }
  94
  95
  96 /**
  97  * Wrapper for dlclose().
  98  */
  99 void
 100 _mesa_dlclose(void *handle)
 101 {
 102 #if defined(__blrts)
 103    (void) handle;
 104 #elif defined(_GNU_SOURCE)
 105    dlclose(handle);
 106 #elif defined(__MINGW32__)
 107    FreeLibrary(handle);
 108 #else
 109    (void) handle;
 110 #endif
 111 }
 112
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