src/libs/posix_error_mapper/posix_error_mapper.h

   1 /*
   2  * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef POSIX_ERROR_MAPPER_H
   6 #define POSIX_ERROR_MAPPER_H
   7
   8 #include <dlfcn.h>
   9 #include <errno.h>
  10
  11 #include <Errors.h>
  12
  13
  14 #define GET_REAL_FUNCTION(returnValue, function, parameters)            \
  15         static returnValue (*sReal_##function)parameters                                \
  16                 = (returnValue (*)parameters)dlsym(RTLD_DEFAULT, #function)
  17
  18 #define HIDDEN_FUNCTION(function)       asm volatile(".hidden " #function)
  19
  20 #define WRAPPER_FUNCTION(returnValue, function, parameters, body)       \
  21 returnValue function parameters                                                                         \
  22 {                                                                                                                                       \
  23         HIDDEN_FUNCTION(function);                                                                              \
  24         GET_REAL_FUNCTION(returnValue, function, parameters);                   \
  25         body                                                                                                                    \
  26 }
  27
  28 #endif  // POSIX_ERROR_MAPPER_H