release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/include/c++/4.5.3/arm-brcm-linux-uclibcgnueabi/bits/cxxabi_tweaks.h

   1 // Control various target specific ABI tweaks.  ARM version.
   2
   3 // Copyright (C) 2004, 2006, 2008, 2009 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 /** @file cxxabi_tweaks.h
  26  *  The header provides an CPU-variable interface to the C++ ABI.
  27  */
  28
  29 #ifndef _CXXABI_TWEAKS_H
  30 #define _CXXABI_TWEAKS_H 1
  31
  32 #ifdef __cplusplus
  33 namespace __cxxabiv1
  34 {
  35   extern "C"
  36   {
  37 #endif
  38
  39 #ifdef __ARM_EABI__
  40   // The ARM EABI uses the least significant bit of a 32-bit
  41   // guard variable.  */
  42 #define _GLIBCXX_GUARD_TEST(x) ((*(x) & 1) != 0)
  43 #define _GLIBCXX_GUARD_SET(x) *(x) = 1
  44 #define _GLIBCXX_GUARD_BIT 1
  45 #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
  46 #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
  47   typedef int __guard;
  48
  49   // We also want the element size in array cookies.
  50 #define _GLIBCXX_ELTSIZE_IN_COOKIE 1
  51
  52   // __cxa_vec_ctor should return a pointer to the array.
  53   typedef void * __cxa_vec_ctor_return_type;
  54 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x
  55   // Constructors and destructors return the "this" pointer.
  56   typedef void * __cxa_cdtor_return_type;
  57
  58 #else // __ARM_EABI__
  59
  60   // The generic ABI uses the first byte of a 64-bit guard variable.
  61 #define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0)
  62 #define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1
  63 #define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1)
  64 #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
  65 #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
  66   __extension__ typedef int __guard __attribute__((mode (__DI__)));
  67
  68   // __cxa_vec_ctor has void return type.
  69   typedef void __cxa_vec_ctor_return_type;
  70 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return
  71   // Constructors and destructors do not return a value.
  72   typedef void __cxa_cdtor_return_type;
  73
  74 #endif //!__ARM_EABI__
  75
  76 #ifdef __cplusplus
  77   }
  78 } // namespace __cxxabiv1
  79 #endif
  80
  81 #endif