src/gallium/auxiliary/util/u_dl.c

   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_LOCAL);
  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 }