0f3e711eef
libstdc++-v3/ * configure.ac (--enable-linux-futex): Add new configure option. (HAVE_LINUX_FUTEX): New AC_DEFINE. * Makefile.in: Rebuilt. * aclocal.m4: Rebuilt. * configure: Rebuilt. * config.h.in: Rebuilt. * config/cpu/generic/cxxabi_tweaks.h (_GLIBCXX_GUARD_BIT, _GLIBCXX_GUARD_PENDING_BIT, _GLIBCXX_GUARD_WAITING_BIT): Define. * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_BIT, _GLIBCXX_GUARD_PENDING_BIT, _GLIBCXX_GUARD_WAITING_BIT): Define. * libsupc++/guard.cc: Include climits and syscall.h. (_GLIBCXX_USE_FUTEX): Define if futex syscall and atomic builtins are supported. (_GLIBCXX_FUTEX_WAIT, _GLIBCXX_FUTEX_WAKE): Likewise. (__guard_test_bit): New static inline. (__cxa_guard_acquire, __cxa_guard_release, __cxa_guard_abort): Use atomic builtins and futex syscall if _GLIBCXX_USE_FUTEX. config/ * futex.m4: New file. libgomp/ * configure.ac: Move futex checking into ../config/futex.m4. * configure: Rebuilt. * aclocal.m4: Rebuilt. * Makefile.in: Rebuilt. * configure.tgt: Rename have_tls to gcc_cv_have_tls to match 2007-10-15 ../config/tls.m4 change. From-SVN: r131399
87 lines
3.1 KiB
C++
87 lines
3.1 KiB
C++
// Control various target specific ABI tweaks. ARM version.
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// Copyright (C) 2004, 2006, 2008 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/** @file cxxabi_tweaks.h
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* The header provides an CPU-variable interface to the C++ ABI.
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*/
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#ifndef _CXXABI_TWEAKS_H
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#define _CXXABI_TWEAKS_H 1
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#ifdef __cplusplus
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namespace __cxxabiv1
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{
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extern "C"
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{
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#endif
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#ifdef __ARM_EABI__
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// The ARM EABI uses the least significant bit of a 32-bit
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// guard variable. */
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#define _GLIBCXX_GUARD_TEST(x) ((*(x) & 1) != 0)
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#define _GLIBCXX_GUARD_SET(x) *(x) = 1
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#define _GLIBCXX_GUARD_BIT 1
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#define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
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#define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
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typedef int __guard;
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// We also want the element size in array cookies.
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#define _GLIBCXX_ELTSIZE_IN_COOKIE 1
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// __cxa_vec_ctor should return a pointer to the array.
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typedef void * __cxa_vec_ctor_return_type;
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#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x
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// Constructors and destructors return the "this" pointer.
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typedef void * __cxa_cdtor_return_type;
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#else // __ARM_EABI__
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// The generic ABI uses the first byte of a 64-bit guard variable.
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#define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0)
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#define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1
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#define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1)
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#define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
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#define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
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__extension__ typedef int __guard __attribute__((mode (__DI__)));
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// __cxa_vec_ctor has void return type.
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typedef void __cxa_vec_ctor_return_type;
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#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return
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// Constructors and destructors do not return a value.
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typedef void __cxa_cdtor_return_type;
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#endif //!__ARM_EABI__
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#ifdef __cplusplus
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}
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} // namespace __cxxabiv1
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#endif
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#endif
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