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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2009 VMware, Inc.
  4.  * Copyright 1999-2008  Brian Paul
  5.  * All Rights Reserved.
  6.  *
  7.  * Permission is hereby granted, free of charge, to any person obtaining a
  8.  * copy of this software and associated documentation files (the
  9.  * "Software"), to deal in the Software without restriction, including
  10.  * without limitation the rights to use, copy, modify, merge, publish,
  11.  * distribute, sub license, and/or sell copies of the Software, and to
  12.  * permit persons to whom the Software is furnished to do so, subject to
  13.  * the following conditions:
  14.  *
  15.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17.  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18.  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19.  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20.  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21.  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22.  *
  23.  * The above copyright notice and this permission notice (including the
  24.  * next paragraph) shall be included in all copies or substantial portions
  25.  * of the Software.
  26.  *
  27.  **************************************************************************/
  28.  
  29.  
  30. #include "pipe/p_config.h"
  31. #include "pipe/p_compiler.h"
  32.  
  33. #if defined(PIPE_OS_UNIX)
  34. #include <dlfcn.h>
  35. #endif
  36. #if defined(PIPE_OS_WINDOWS)
  37. #include <windows.h>
  38. #endif
  39.  
  40. #include "u_dl.h"
  41. #include "u_pointer.h"
  42.  
  43.  
  44. struct util_dl_library *
  45. util_dl_open(const char *filename)
  46. {
  47. #if defined(PIPE_OS_UNIX)
  48.    return (struct util_dl_library *)dlopen(filename, RTLD_LAZY | RTLD_GLOBAL);
  49. #elif defined(PIPE_OS_WINDOWS)
  50.    return (struct util_dl_library *)LoadLibraryA(filename);
  51. #else
  52.    return NULL;
  53. #endif
  54. }
  55.  
  56.  
  57. util_dl_proc
  58. util_dl_get_proc_address(struct util_dl_library *library,
  59.                          const char *procname)
  60. {
  61. #if defined(PIPE_OS_UNIX)
  62.    return (util_dl_proc) pointer_to_func(dlsym((void *)library, procname));
  63. #elif defined(PIPE_OS_WINDOWS)
  64.    return (util_dl_proc)GetProcAddress((HMODULE)library, procname);
  65. #else
  66.    return (util_dl_proc)NULL;
  67. #endif
  68. }
  69.  
  70.  
  71. void
  72. util_dl_close(struct util_dl_library *library)
  73. {
  74. #if defined(PIPE_OS_UNIX)
  75.    dlclose((void *)library);
  76. #elif defined(PIPE_OS_WINDOWS)
  77.    FreeLibrary((HMODULE)library);
  78. #else
  79.    (void)library;
  80. #endif
  81. }
  82.  
  83.  
  84. const char *
  85. util_dl_error(void)
  86. {
  87. #if defined(PIPE_OS_UNIX)
  88.    return dlerror();
  89. #elif defined(PIPE_OS_WINDOWS)
  90.    return "unknown error";
  91. #else
  92.    return "unknown error";
  93. #endif
  94. }
  95.