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  1. /*
  2.  * Copyright (C) 2012 Intel Corporation. All Rights Reserved.
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person obtaining a
  5.  * copy of this software and associated documentation files (the
  6.  * "Software"), to deal in the Software without restriction, including
  7.  * without limitation the rights to use, copy, modify, merge, publish,
  8.  * distribute, sub license, and/or sell copies of the Software, and to
  9.  * permit persons to whom the Software is furnished to do so, subject to
  10.  * the following conditions:
  11.  *
  12.  * The above copyright notice and this permission notice (including the
  13.  * next paragraph) shall be included in all copies or substantial portions
  14.  * 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
  18.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  19.  * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  20.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  21.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  22.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23.  */
  24.  
  25. #ifndef DSO_UTILS_H
  26. #define DSO_UTILS_H
  27.  
  28. #include <stdbool.h>
  29.  
  30. /** Generic pointer to function. */
  31. typedef void (*dso_generic_func)(void);
  32.  
  33. /** Library handle (opaque). */
  34. struct dso_handle;
  35.  
  36. /** Symbol lookup table. */
  37. struct dso_symbol {
  38.     /** Symbol name */
  39.     const char  *name;
  40.     /** Offset into the supplied vtable where symbol is to be loaded. */
  41.     unsigned int offset;
  42. };
  43.  
  44. /**
  45.  * Opens the named shared library.
  46.  *
  47.  * @param[in]  path  the library name, or NULL to lookup into loaded libraries
  48.  * @return the newly allocated library handle
  49.  */
  50. struct dso_handle *
  51. dso_open(const char *path);
  52.  
  53. /** Closes and disposed any allocated data. */
  54. void
  55. dso_close(struct dso_handle *h);
  56.  
  57. /**
  58.  * Loads symbols into the supplied vtable.
  59.  *
  60.  * @param[in]  handle           the DSO handle
  61.  * @param[in]  vtable           the function table to fill in
  62.  * @param[in]  vtable_length    the size (in bytes) of the function table
  63.  * @param[in]  symbols          the NULL terminated array of symbols to lookup
  64.  * @return true on success, false otherwise
  65.  **/
  66. bool
  67. dso_get_symbols(
  68.     struct dso_handle          *h,
  69.     void                       *vtable,
  70.     unsigned int                vtable_length,
  71.     const struct dso_symbol    *symbols
  72. );
  73.  
  74. #endif /* DSO_UTILS_H */
  75.