include/llvm/Support/CBindingWrapping.h

   1 //===- llvm/Support/CBindingWrapph.h - C Interface Wrapping -----*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file declares the wrapping macros for the C interface.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_SUPPORT_CBINDINGWRAPPING_H
  15 #define LLVM_SUPPORT_CBINDINGWRAPPING_H
  16
  17 #include "llvm/Support/Casting.h"
  18
  19 #define DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ty, ref)     \
  20   inline ty *unwrap(ref P) {                            \
  21     return reinterpret_cast<ty*>(P);                    \
  22   }                                                     \
  23                                                         \
  24   inline ref wrap(const ty *P) {                        \
  25     return reinterpret_cast<ref>(const_cast<ty*>(P));   \
  26   }
  27
  28 #define DEFINE_ISA_CONVERSION_FUNCTIONS(ty, ref)        \
  29   DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ty, ref)           \
  30                                                         \
  31   template<typename T>                                  \
  32   inline T *unwrap(ref P) {                             \
  33     return cast<T>(unwrap(P));                          \
  34   }
  35
  36 #define DEFINE_STDCXX_CONVERSION_FUNCTIONS(ty, ref)     \
  37   DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ty, ref)           \
  38                                                         \
  39   template<typename T>                                  \
  40   inline T *unwrap(ref P) {                             \
  41     T *Q = (T*)unwrap(P);                               \
  42     assert(Q && "Invalid cast!");                       \
  43     return Q;                                           \
  44   }
  45
  46 #endif